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Team Juric
Australia
Приєднався 1 чер 2017
Design and build of a Lotus 25 Cyclekart.
We are also keen to share some good practices for engineering design and analysis in the race car or home built car space.
We are also keen to share some good practices for engineering design and analysis in the race car or home built car space.
Team Juric - Lotus 25 Cyclekart Design Part 3 – Seat, Steering, Universal Joints, Brakes & Bodywork
TEAM JURIC - DESIGN PART 3 - Seat, Steering, Universal Joints, Brakes & Bodywork
In Parts 1 & 2 we looked at
- Rule and Intent
- Layout and Architecture
- Dynamics
- Power Train
Originally, I was going to look at Chassis and Suspension Structures however, the content grew such that it’s now its own video, so it’s a 4-part Trilogy!
In this video, we will be looking specifically at:
Driver controls
• Seat
• Seat Belt
• Steering
• Universal Joints
• Steering Arm Rates
• Brake System
• Braking Weight Transfer
• Braking Tyre Forces
• Braking Acceleration
• Braking Torque
• Calliper Selection
• Line Pressures
• Master Cylinder Sizing
• Pedal Ratio and Foot Forces
• Pedal Box Brake and Accelerator
Bodywork
• 2d Faceting
• Buck/Male Mold
• Female Molds
• Bogging and Sanding
• Final Parts
• Perspex Wind Deflector
I start with the seat and cockpit layout; we’ve already covered the ergonomics but having a supportive seat holding you in place is key!
The steering system is broken down into each component.
I do a deep dive into the way Universal Joints work and how they fluctuate in speed with increased angle and joint phasing. Key takeaways are to have at least two at the same internal angles and 90 deg out of phase to make them a constant velocity joint!
Next, we design the entire braking system from braking potential, and tyre grip, to the selection of rotors, callipers, line pressures, master cylinders, pedal ratios, and foot forces.
The pedal box is broken down into what is important, STIFFNESS!!
Finally, a look at how I propose to make the beautiful, laborious bodywork. I’m sure you will all enjoy future videos of me block-sanding myself into oblivion!!
We hope you enjoy!
Leave us a comment below or DM us on Instagram or Facebook @teamjuric
Part Four Stuctures and the chassis build series are in the works so stay tuned!
#carbuild #chassis #design #builtnotbought #carbuild #cardesign #suspension #doublewishbone #midengine #rearengine #vehicles #vehicledesign #cyclekart #lotus25 #teamjuric #welding #fabrication #spaceframe #chassis #chassisfab #machining #steering #tubeframe #jig #cardesign #carbuild #projectcar #racecar #engineering #automotivedesign #engineeringdesign #camber #castor #caster #KPI #scrubradius #steeringgeometry #suspensiongeometry #formulalibre #beamaxle #ergonomics #driverplacement #steeringrack #vehicledynamics #gx200 #tav2-30 #rollrates #spring #springs #springrates #suspensiongeometry #dampers #rollcentre #rollcenter #cv #constantvelocityjoint #steeringrack #universaljoint #uj #pedalbox #brake #brakesystem #rotor #mastercylinder #brakepedal #bodymold #mold
In Parts 1 & 2 we looked at
- Rule and Intent
- Layout and Architecture
- Dynamics
- Power Train
Originally, I was going to look at Chassis and Suspension Structures however, the content grew such that it’s now its own video, so it’s a 4-part Trilogy!
In this video, we will be looking specifically at:
Driver controls
• Seat
• Seat Belt
• Steering
• Universal Joints
• Steering Arm Rates
• Brake System
• Braking Weight Transfer
• Braking Tyre Forces
• Braking Acceleration
• Braking Torque
• Calliper Selection
• Line Pressures
• Master Cylinder Sizing
• Pedal Ratio and Foot Forces
• Pedal Box Brake and Accelerator
Bodywork
• 2d Faceting
• Buck/Male Mold
• Female Molds
• Bogging and Sanding
• Final Parts
• Perspex Wind Deflector
I start with the seat and cockpit layout; we’ve already covered the ergonomics but having a supportive seat holding you in place is key!
The steering system is broken down into each component.
I do a deep dive into the way Universal Joints work and how they fluctuate in speed with increased angle and joint phasing. Key takeaways are to have at least two at the same internal angles and 90 deg out of phase to make them a constant velocity joint!
Next, we design the entire braking system from braking potential, and tyre grip, to the selection of rotors, callipers, line pressures, master cylinders, pedal ratios, and foot forces.
The pedal box is broken down into what is important, STIFFNESS!!
Finally, a look at how I propose to make the beautiful, laborious bodywork. I’m sure you will all enjoy future videos of me block-sanding myself into oblivion!!
We hope you enjoy!
Leave us a comment below or DM us on Instagram or Facebook @teamjuric
Part Four Stuctures and the chassis build series are in the works so stay tuned!
#carbuild #chassis #design #builtnotbought #carbuild #cardesign #suspension #doublewishbone #midengine #rearengine #vehicles #vehicledesign #cyclekart #lotus25 #teamjuric #welding #fabrication #spaceframe #chassis #chassisfab #machining #steering #tubeframe #jig #cardesign #carbuild #projectcar #racecar #engineering #automotivedesign #engineeringdesign #camber #castor #caster #KPI #scrubradius #steeringgeometry #suspensiongeometry #formulalibre #beamaxle #ergonomics #driverplacement #steeringrack #vehicledynamics #gx200 #tav2-30 #rollrates #spring #springs #springrates #suspensiongeometry #dampers #rollcentre #rollcenter #cv #constantvelocityjoint #steeringrack #universaljoint #uj #pedalbox #brake #brakesystem #rotor #mastercylinder #brakepedal #bodymold #mold
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Team Juric Lotus 25 Cyclekart Design Part 2
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Welcome back to Part 2 of the Team Juric Lotus 25 Cyclekart design series. In Part 1 we looked at - Rule and Intent - Layout and Architecture In this video, we will be looking specifically at: Dynamics • Ride and roll rates explanation. • Rear axle • Front axle • Ride and roll rates. • Load cases Powertrain • Engine and transmission • Final drive and chain We will be expanding our knowledge on ...
Team Juric - Lotus 25 Cyclekart Design - Part 1
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Welcome to Part 1 of the Team Juric Lotus 25 Cyclekart design series. This three-part series will cover the following scope. Part 1 -Rule and Intent - Layout and Architecture Part 2 - Dynamics - Powertrain Part 3 - Driver Controls - Structures including chassis and suspension - Bodywork In this video, we will be looking specifically at: - What is a Cyclekart - Scope of the Design Series - Why a...
Team Juric - Cyclekart Series Introduction
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Welcome to the Team Juric Cyclekart Series Introduction. We are very excited to share our Lotus 25 design and build series. I'm Phil, the project lead for the Cyclekart Project. As an engineer and project manager I got the itch to get back into the design and build of a car. I used to build FSAE/FStudent cars as well as a Formula Libre car, but I've got a young family and not enough moneys for ...
TEAM JURIC INTRODUCTION
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Welcome to Team Juric. We are super excited to share our design and build projects with you. We will be kicking off our cyclekart series shortly, plus many other projects we have. Our team is made up of the bosses Lulu and George, Jonty and Phil We look forward to sharing our journey with you and feel free to reach out or look us up on Insta or Facebook @teamjuric #cyclekart #builtnotbought #ca...
Wow! I don’t think I’ve seen a more clear and concise explanation of steering geometry! Thanks!
Thanks man! Glad you liked it. Do you have a project you're working on?
Just found the channel a few days ago and immediately binge watched the entire content😅 So awesome! Really appreciate the methodical approach and the neatness and clarity of your presentations. Grabbing popcorn for the next one!
I'm glad you liked it, what are you building? Unfortunately part 4 hasn't been touched in a while, the kids and work has kept me busy. I'll try to have another run at it before the end of the year
@@teamjuric I'm rooting for it:) Can appreciate your circumstances, i'm in the same boat! Not building anything quite yet, but I am exploring vehicle dynamics on a mk3 MX5, which, as far as road car chassis goes, seems quite beautifully designed/packaged.
Almost year has passed. Maybe overplanning is not the best thing for simple projects like cyclekart
Yeh, been busy with work unfortunately. Glad you watched it, did you get anything out of it?
Man, if I build one of these, a small block V8 is gonna go in it.
🤣small block weighs more than the car itself.
This is a nice familiy project. My sons and I would love to build something similar. Good luck to you and I really enjoy the series.
Thank you, it's a bit slow going but I'm hoping to get back into things soonish. Just have a crack at something with the kiddos, and work up to a bigger project! Good luck!
I cannot wait way too excited!!
I hope all is well!! I’m new to cyclekart and you are my professor!! I’m eagerly awaiting part 4 I hope it’s still in the works!!
I’m excited for part four!!
Thanks for making this build series!!
Thanks Paul! Appreciate your kind words. Part 4 is still in progress, I'm hoping to get some free time to finish off the pictures and start the recording! Cheers, Phil
@@teamjuric that’s excellent news!! Thanks Phil!!
Is there anything else you were interested in getting some more insight into? The next vid is less specific on cyclekarts and more a general chassis theory. Or are you more interested in cyclekart specific things
@@teamjuric I’m really enjoying watching how you’re applying general chassis design and actual race car dynamics to cyclekart cars please keep doing your thing!! Your karts gonna be a beast for real!!
Thanks for the feedback, unfortunately my take on cyclekarts is typically frowned upon by the majority of that community. So I'm just off to the side doing my thing, if I had the money I'd actually want to build my hillclimb/autocross car but this is the best way I can have fun
I think most people who look at this can read! Your into is over long?
Thanks chief, I'll keep that in mind for the next video I'm working on, hopefully you've enjoyed the main bits of content
@teamjuric I you didn't think I was being rude, but I wanted your content, which was great.your 16-inch wheels were, "Do you get yours from, and what's the cost
I got them off eBay, the ones most expert cyclekarters think are the worst ones. They were $75AUD each Yeh it's hard to tell on this, there are lots of experts and keyboard warriors who like to comment on here...
amazing content. thanks for sharing.
Thanks for the kind words. I have more videos being worked on at the moment, chassis and suspension structures. Was there any specific things you wanted to know more about?
@@teamjuric Hi, and thanks for asking. Apologies but the technical term escapes me, but how does one select front and rear spring rates to prevent unwanted oscillations? I think it's also called porpoising? Also, how critical is it to calculate roll rate? Your content is awesome. I spent over a year as an unofficial member of a Formula SAE team at a local college a few years ago. I've read every race car chassis and suspension book I can find - Adams, Aird, Costin and Phipps, Terry and Baker, Van Valkenberg and the Carrol Smith books. I also have Milliken and Milliken but it's so dense! Your content is the most detailed - and more importantly - accessible explanation of critical content that I've found. I just started cutting metal on a build that I've been preparing for/working on for many years. The base is a completely stripped '81 Bertone X1/9 body shell. What I'm doing is, think what Ferrari did with the 308 to build the 288 GTO - building a tubular chassis within the body shell and installing an Alfa twin cam + WRX transaxle in a longitudinal layout, with suspension based on a modified NA Miata geometry, preserving the inboard suspension pickups and building longer control arms to extend the OEM track from 56 in to ~60 in F/R. Similar to what Bilinski did with the front end of Midlana. Currently designing a street-specific roll cage to be build by a local speed shop after a design review, then I will fit up and tack tubing for the front and rear subframes then back to the speed shop for design review and final welding.
Hello! That sounds like a fantastic project, lots of scope to do a whole lot of fun sub projects!! I do like the x1/9, it's such a beautiful car, there is something special about the wedge style and pop up head lights that just put a smile on my face! Combine that shape and some better dynamics and a twin cam and you're going to have an absolute beast!! Id never heard of the Midlana until today, that looks super fun. For your questions about dynamics 1. Porpoising related oscillations are due to sensitive underbody aerodynamic interaction with the ground, complicated and not relevant to any of us, that term is very specific to high downforce stiffly sprung racing cars. 2. However for unwanted oscillations the very short version is, your dampers/shock absorbers do the job of absorbing, transmitting and dissipating the majority of the oscillations. 3. Slightly longer version, you will always get oscillations, but unwanted is very subjective, a passenger car doesn't want to be so stiff that you shake the fillings out of your teeth, but then a race car doesn't want floaty type oscillations that is comfortable for ride as aero platform control is so critical. So the challenge is picking what kind of behaviour you want and starting from there, RCVD does go into detail on this with good guidance on the two methods (ride frequency or travel). 4. I'll be getting into a lot more detail of roll rates in my next video that I'm currently working on, but essentially it is important. The relative roll stiffness of each axle is pretty much the main tool used to adjust the over/under/neutral steer balance of the car.
Promo'SM 💯
Such a great overview. Designing my cyclekart now. Where did you find the CAD model of the engine and ‘torque converter’ (or did you just make it?)
Thanks mate, I found the CAD models off GrabCAD. I try to avoid having to draw off the shelf gear.I always google them first to see if a model exists and if not I psych myself up and spend hours making dodgy simplified CAD models in between lots of swearing and crying. Link to the torque converter cad I think I used. If you have any questions or need a sounding board ping me a message in Facebook or insta messenger. grabcad.com/library/torque-converter-comet-tav2-30-100-gtc-tc2-1004-40-41p-1-bore-1/files Cheers, Phil
Found the engine there but missed this. Nice! Thank you!
@@coultl6556 my pleasure
Hearing you mention FSAE is awesome. I've been involved with cyclekarts for a while and have videos on them on my channel but am now at university an very involved with the Formula Student team there. Cyclekarting really is a hobby for those who miss being involved with formula student!!! Love the video, excited to watch the rest
FStudent is such a good experience for engineers, it's a shame that a small number of students get to do it or an equivalent project during school. What team are you part of and what aspect of the car are you involved in? Cyclekart is a great hobby for those who miss it, it's not all about the race, it's about the process and journey. There isn't a lot of appreciation of how much work is involved in not physical construction but also getting the design right so you don't ruin the fun. I'm glad there are others like you who get that these videos are not about building a cyclekart that will $hit on everyone and ruin everything. For me I'm just sharing the process and rationale behind my choices, ala design event... Im still trying to get the chassis video done before Christmas but there is a lot to go...
If you don’t mind me asking is there any specific programs you use for suspension design/kinematics?
Hi Gavin, I used CAD and excel for my own kinematics for cost reasons, but at Monash I used and the team still use Susprog3d, which is excellent. Robert Small who wrote the software is super helpful and has been supporting it for over 20 years, I think he is up to build 1500! There are others like OptimumKinematics which is great, but it's very expensive and does almost the same as Susprog3d... Depending on the use case, maybe start with the optimumK trial and see if you want to invest in it. What project are you working on?
@@teamjuric Thanks for the reply! I am actually planning on doing a very similar build to yours. I am trying to make a cyclekart inspired miniaturized lotus super 7. I plan on using independent front suspension and a fixed rear axle driven by a 125cc atv motor with about 7.5hp with a three speed transmission. I am going to try a chain driven front engine setup given the offset seating in the lotus and the very rearward driver position. I am also going to use the same or a very similar wheel and hub setup as a cyclekart. For the general floorplan I will us a wheelbase/track of ~177.5 cm x 97.5 cm. The whole build has a lot of similarities to the bloody mary hillclimb car.
That sounds awesome! Id love to see your progress. Hit me up if you have any questions, you can send me a message on insta or Facebook if you are on those
Very comprehensive explanation of these complex tech design details! Kudos!
Thank you, Ive got another video in the works
Outstanding presentation. Many years ago Road & Track Magazine ran a series of articles on designing a sports car. This kind of information, what and how, as you have presented it. Provided, at a level just below engineering school levels, for the gear head with some mechanical knowledge to understand. Steering mechanics applies not to just cycle cars, but to any four wheel,and two in front three wheeled vehicle. Thank you very much for the refresher. You have me hooked. Its going to be interesting.
Glad you enjoyed it! I should have been more clear as it's not meant to be specifically about cyclekarts, it's just the project I'm building, the content is actually for wider consumption and can be applied to anything. I'm lucky enough to have been exposed to this and I take the knowledge for granted, hopefully this is accessible to anyone who is actually interested in learning
Can't wait!! Looks awesome
Me neither
Stupid question, I'm sure, but why not just point the steering wheel axis at the rack pinion shaft and vice versa, so that in conditions of minimal distortion of the space frame there is approximately zero angle on the UJs?
Not at all, it's a good question actually. Ideally it should be, but it's easier to fabricate them horizontally because I'm rusty. Eventually I want to simplify it to a single shaft and a bushing as the bearings and UJs are heavy.
buggatti also used alloy wheels in the 1920s
Many thanks for your efforts in providing valuable technical design information for cyclekart builders. Looking forward to future episodes.
I'm glad you liked it. The next episodes are still a bit away, but hopefully something before the end of the year.
I am currently building a wood mock up of my kart project similar to yours, it is a bit of a challenge to package my XLT body into a mid engine kart with A arm front suspension.
I'm not familiar with an XLT body, what is that? The challenge is the fun bit 😁 To be honest I actually don't like driving the cars, I just like the design and build journey
@@teamjuric XLT = extra, large, tall.
Oh dear, I should have read your original post again. I thought you were talking about a type of car not yourself 🤪
Just heard of cyclekarts for the first time today. Instantly love all the karts and the simplicity, along with really honing race craft. Thought I knew about suspension until today. Great video and great info!
They are really great, I wouldn't say that racing is really the intention and I'm going a bit off the beaten track with mine compared to the more conventional cyclekarts. Glad you found the deep dive useful! What projects are you working on?
a lot of planning going into this one I cant wait to see you start some fabrication I was thinking about building a Cyclekart 5 years ago but they where not very common in Australia so I decided to build a half scale lotus 7 instead.
Thanks man, I'm so rusty with this whole thing I went back and did everything step by step from first principles. I've been fabricating the chassis, but it's been slow going with moving house and work. They're not common but there are a few people building them, would you consider building one? What motor did you use in the 7?
@@teamjuric yeah there are a few now but not 5 years ago, I probably would considder building one now but I want to build my 62 mini with honda driveline and suspension before I start any more random projects. As for the "cubman" I used a 125cc 3+1 mini quad bike motor so it has 3 forward speeds and reverse its more of a microcar than a gokart as it also has full lighting and instruments as well. I have the build series on my channel if you have time.
The mini with the Honda motor is a great combination. That's neat, I'll have a look at your vids!
Going on like this and will end up with V12 engines.
Hi David, I do not think I was advocating doing anything other than following the guidelines to keep to the original intent of cyclekarting. I am just sharing some basic engineering and vehicle dynamics principles. You're drawing a long bow to suggest that using a car that was on the cusp of moving away from wire wheels or explaining how castor or trail works means we will end up with v12s in CycleKarts... Have you actually watched the videos or are you just assuming what my intentions are?
Wow... you literally blew my mind. That was a brilliant tutorial, I only realise now how little I knew. Thanks so much for your time and effort. You just perfectly illustrated the generosity of makers and the beauty of shared knowledge.
Thank you! I was fortunate enough to be taught by a real diverse group of amazing people and I hope I'm doing them justice by sharing some of that knowledge and if you read the comments I'm learning lots from the community. Being curious and having the community mindset is so important. If there are other things you're interested in please let me know. I'm using the cyclekart as the basis for this (which has aggrieved some people) however all these principles apply to any vehicle, if I had the money and time it would actually be a motorbike engined open wheeler that would be the project basis, but this project is a great compromise of cost, complexity and fun!! Do you have a project you're working on?
Great comment. I'm from Brazil and amazed how friendly and talented cyclekart groups are. Hope someday I have one. Congrats to you ali.
It is a great community! What inspiration car would you base your cyclekart on?
Very good explanation thanks
Thank you for watching, hopefully it gives you some food for thought
The smaller the drive sprocket, the more the chain has to 'turn' on the link and the hotter it will run. (and the quicker it wears out or breaks) Reynolds Chains in the 1950's (when they were premier chain maker in the world) stated that 19t was minimum recommended for drive sprockets with an even number of teeth for driven sprockets. Saying this, Japanese manufacturers and off road bikes have been running drive sprockets as low as 11 teeth although 14 or 16 is more common (down from norm of 17t-18t in 1960's-70's) One other thing you should take into account, motorcycle hubs are not designed for lateral forces so increasing cornering ability can cause them to break, usually around the bearing rather than spoke flanges. Instead of moving axle or engine, a chain roller tensioner may be better, particularly as drive will only be one direction as CVT usually 'free wheels' rather than enables engine braking
Thanks for the advice, the duty of this car is low im not super concerned about longevity. I'm going to see what the installation stiffness of the wheels is specifically at the hub, it is where most wheels fail. Yeh the chain tensioning is not my strong suit but I still like having positive adjustment of the chain at static and then you can do the fine adjustment with a sprung chain tensioner. You sound like you've build a few cyclekarts?
@@teamjuric Actually, I haven't but been thinking about building one as I'm too old to be falling down at high speed nowadays. The wheels rarely fail on bike (C50-CB100), even when overloaded a bit but when smaller hubs are used to save weight on race bikes they crack , particularly if 'ventilated' to aid cooling. AHRMA (American Historic Racing Motorcycle Association) requires drum brakes on all pre-1974 bikes (which can fade pretty quick compared to discs). I have melted the centres out of brake pads when 'trying a bit' using organic instead of sintered pads (even if organics work much better in the wet) Hubs have a pretty easy fix though, have a shrink fit plate to support outer edge of brake drum so it can't flex, either in drum or just on edge as basically the drum brake hub is a 'U' with bearing support on lower end extended to the open end Cheap way to go racing was get a street Honda CB350 and modify things as and when you could afford it, just stripping them down to basics shed around 60 lbs (there were over 3 million CB350's made and are still pretty common for a bike that went out of production in 1973) I was a motorcycle mechanic, shop manager, instructor, etc for 50 years but unlike most I actually studied things (failed engineer, couldn't do the math, even with a slide rule, LOL) You kinda lost me with your calculations even when they were well explained (the steering/weight transfer, etc was excellent, understood things much better since I tried studying it in the 80's and again in the 90's) I've seen a lot of broken stuff over the years, some I even broke myself 😁. Always try to figure out why things broke, often I could tell customers what they did, usually shocked the hell out of them as they were 'just riding along' All for now
I wondered how long it would be before I saw some professional design engineers enter this sport; it was inevitable but feels slightly outside the spirit of what in the USA and UK is intended to be a very low cost eccentric motor sport spawned in the home garage.
I am building my car in my home garage at an extremely low cost, the minister of finance aka my wife wouldn't sanction anything ridiculous. It's a pity so many people see this as outside of the spirit, I'm not building it to win some non-existent competition. This endeavour has really given me some enjoyment and a nice cost effective creative outlet for me. I honestly thought the spirit of cycle karting is to have fun building your own car from scratch, joining a good community and learning something. You're not the first and won't be the last to comment like this, but I'm going to keep having fun building my car in my home garage and hopefully pass on some knowledge to people who are interested in how to design and build a car from scratch.
Same thing happened to go-karts.
There is a difference in that go karts were pretty much a competition from the start which brings money, this will never be anything other than a hobby as it's freedoms give you the chance to express yourself, the manifesto makes it clear this is not about competition etc...
Be under no illusions. A British person can design and build a rocket in their garden shed 👍
With ingredients stolen from under kitchen sink 😂@@jrea424
I want to make a cyclekart and the comments here are making me kind of sad bc i want to build something not specific to this time period. Dont mind using the engine and basic construction, but i want to make the body something of my own. This is probably the closest thing ive seen, but way more above my understanding of how to make one as far as the chassis goes. I think thats what the complaints commentary are saying also. But i think this car is cool anyway.
Hi Joshy-Z, The thing I like about cyclekarts is that they're a great balance of cost, complexity and design freedom to make something really fun to build and drive! I've also found most people in the community are curious and very supportive I don't get too caught up in people's opinions on what is "real" and isn't (I'm more curious as to why they feel a particular way), just do your thing, fun is subjective, build something you enjoy. What body were you thinking of doing? With respect to the explanations, I'm documenting my process, it can be overwhelming but I try to lay it out in a more typical design process that a race car follows, but this doesn't need to be followed. You follow the process that makes sense to you. I guess because I go from first principles, hopefully for some who has a car with heavy steering, or has a really touchy brake pedal, can use these explanations to understand how to get to the bottom of it, maybe... I'm happy to talk through anything if you're interested. Thanks for your kind words too! Cheers, Phil
@teamjuric I want to build something that is a hybrid of a modern F1 car and the cars from the postwar era. No wings or serious aero, but basically a high nose car with a traditional by cyclekart standards rear. There wouldn't be wings or anything like that, but there might be some flow dynamics I would want to come from the floor I intended on building. I'm not good at the calculations of CFD, I just want to drive something I would actually like to see. I thought cyclekarts would be the way, but I guess there is some gatekeeping here, and it's disappointing. I just feel like if you can build it, you should be able to race it. These guys don't really even race, they just have fun. I don't understand why they have these limitations on who should be allowed to if you show up for the same reasons. There is no prize money. Cyclekarts should be building your fantasy car at economical prices. I'm not Adrian Newey.
That would be mega!!! I love the idea of mixing old and new, super cool idea. I think the gatekeeping is the minority, there would be some events to avoid but I'm sure the majority would be keen for something like what you're proposing. There is probably some reluctance due to the dickhe@d factor with people taking these things too far with competing as these cars are super freaking dangerous, but as long as it's clear it's not just about performance or trying to win some imaginary competition they are generally cool. Call it a cyclekart, do your thing, I cannot wait to see it!!
That’s not a cycle kart that’s just your project kart interesting as it maybe good luck with that. I won’t be back
Hi Jeff, what aspects do you feel don't meet the CycleKart intent? I'm getting lots of feedback that it's not a cyclekart, but when I ask what specifically is the problem no one can articulate their position, so I'm feeling pretty confused by the commentary.
Dude! This is what the playlist is designed for…👍
Hi, sorry I don't understand what you mean. Could you explain
@@teamjuric you could bundle all your videos in the series in order into a playlist available on a tab named “playlist’s” from your home page. I started watching video one and skipped back to the intro, then the team. Then video 1, 2, 3 ect. As they are currently presented all the videos in the series are out of order… Hope that makes sense?
@@Mannin_Watch_Time I appreciate the help, I'll fix this up to make it clearer
Great content, but I feel you have moved away from the original concept , but that just my thought . One thing i would like to know is where did you get the steering rack from, as i missed that bit of your presentation.
Hi Paul, what aspect do you feel I have moved away from the original concept? I do try to stick to the guidelines mostly. The rack is a 420mm unit from Ali express. a.aliexpress.com/_mPNa2cO
Thanks for making these very informative and accessible videos @teamjuric ! Definitely a lot to digest here. 😅 I was wondering, I’ve seen a lot of cyclekart races that are on dirt tracks. How do you feel the tarmac based design you’re aiming for here would fare off road? Keep up the great work!
Thanks Andy. Great to hear you're enjoying it, and there is a lot to digest but feel free to reach out any time, happy to talk things through. Honestly I wouldn't have a clue how it would go on dirt. It would probably be too stiff and low, but I think the spool would definitely be decent for traction. I'll have to take it on the dirt to see what it does when I eventually finish it😂
do you sell this chissie I'm in the U S
Hi Jeff, unfortunately I am not selling the plans just yet but once I've completed with the first car I'll consider selling the plans
Sorry to trouble you Enjoying your videos Is there any competition or races for cycle karts Also the yacht fitting you mention for your pedals .,Can you please tell me what they are what brand etc
No trouble at all! Happy to answer any questions! In America there are many events, a few in the UK, but in Australia there aren't any currently. From my understanding they don't really encourage racing or competition, it's more an artistic project as the cars are pretty dangerous... We used to use LM76 slide rails, now the Monash team use Treotham drylin T rail guide, otherwise we did use some Jib rails one year from a yacht, but they're all essentially the same. T Rail with a dovetail and a linear bearing with mounts on it and a detent for positive locking.
@@teamjuric Thank you Sorry but a bit high brow for me Who supplies this equipment? Any chance of some photos? Building a front engined race car where this could be used for clutch brake and accelerator pedal assembly Thanks again David
This is the website for the linear rail. treotham.com.au/bearings/linear-technology/t-rail-guides This is some close ups of the Monash cars rails m.facebook.com/story.php?story_fbid=pfbid0FnxpiESYoCcgEwgiq3GypYGLZG2oR98Y9EEBDy7o9Gyg5fHWpkxirdFCGtvGBLP2l&id=185745901446670&mibextid=Nif5oz
@@teamjuric thank you much appreciated
Any time. Also my series just uses the CycleKart as the project basis, however everything I cover can be applied to any car
Anyone that can actually understand your explanation of u-joints, doesn't need you to explain u-joints to them. LOL This is way too technical for the "built out of junk" intent of cyclekarts, for me... and, I have to wonder why if you were willing to step away from the intent - right from the get-go - by using a tribute car outside of the timeline parameters - why not use this as an opportunity to explore a late model open wheel class, which falls closer to your recipe, anyways? The motorcycle wheels could be swapped out for 13" trailer tires (highway speed rated) on a set of wide and a set of narrower rims, tread patterns could be found that would be suitable to specific surfaces, and the 8hp (301cc) clone motors used, real 4 wheel brakes, limited slip rear axles, safety considerations, etc... a long ways from a legends car, but a much more serious racer than a cyclekart. Much like this video series, it's just food for thought. ;)
I'm happy with my project, it's the right cost and complexity for now. I'm getting back into the groove of the design and build. Ideally I want to then go back and build the hillclimb car, but it's too expensive for me right now so I'll stick to my Lotus... With respect to the UJs explanation, I had someone explain it to me when I was younger so maybe this will help someone else...
500 cc Honda for extra uhm, excitement 👍🦘🇦🇺
What I'd love to do for some excitement is to get a 4 cylinder cbr250 engine, spin that sucker up to 15k rpm!
Bro applying Formula 1 physics to adult go carts...😕
I'm just applying engineering to my project.
This could nearly make me not bother to build one, whilst it might satisfy his ability to convert his very knowledgable engineering skills into practice it almost takes the fun out of wanting to make a car and discover it’s short comings for myself. I wish him well with his endeavours but as these are not ‘racing’ cars I cannot see the point evaluating the vehicle dynamics to this degree.
@metalmicky Hi Micky, the beautiful thing about this hobby is that you do what you feel comfortable with and most importantly have fun. I didn't make these videos to ruin the hobby for anyone. I appreciate your feedback and I'm sorry that it wasn't for you. This isn't for everyone, it's unfortunate that the project Ive used to document my design and build hobby is so contentious and gatekept, but don't let me be a barrier to your enjoyment. To be honest I'd much rather build a hillclimb car, but it's expensive and this is fun, so I'll keep doing the thing that I get great enjoyment from. Hopefully you have a great learning experience and we can one day have a beer and a laugh over our different ways of seeing the world.
Does anyone know if a cycle car could be made to be street legal?
I wouldnt recommend it, they aren't very safe or practical
Not even close to legal.
A reverse trike would be easier to build and be legal.
You show the front axle stub 90deg to the kingpin. If you were to angle the axle stub to 90deg to the road, but kept the kingpin angle your steering would have a reduced effort. Angle the axle stub
Hi thanks for the comment. With respect to the stub axle perpendicular to the king pin, I only did that to illustrate the effect in an exaggerated case. Normally the stub angle would be 1-3deg relative to the horizontal depending on how much static camber you design into the system. Changing the stub angle will move the contact patch relative to the steering axis, but it's at the expense of camber so it is a parameter to adjust but it's generally not common to adjust camber for steering effort... On some setups like gokarts you can only adjust camber with kpi, but I like to decouple these two as they have different effects.
@@teamjuric Ah, understood! Now it makes sense. Sorry 🙂
All good! I like having these conversations, I always go back over the content and make sure what I've presented is somewhat accurate, as I'm very rusty with some of this stuff!
Thanks. This is one of the best explanations I've ever seen.
Thank you!
Fantastic explanation, thank you for sharing!
Glad it was helpful!
The best and simplest explanation of steering and suspension geometry I have seen, thanks
Thank you!!
@Fur8002. Seconded.
@@pommunist really glad it was helpful
My muddle son was part of formula student here in the uk. My uni race build was for a 24hr peddle car race. Cycle karts fall nicely between the two. A benefit beyond build cost vs proper hillclimb cars is the running cost. Just the saftey gear is a lot of money these days regardless of entry fees, tyres etc etc etc.
CycleKarts are a nice middle ground, there isn't a competition as such but you can make of it whatever you want. Yeh I shudder to think what the costs of competing in hillclimbs are now... I still like watching them, but it might be a bridge too far for me now unfortunately
Cute! Good luck with the channel. You remind me of something I remember as Hanahs Bug some years back with a teen girl restoring her VW.
Hannah's Bug
Thank you, by the time I'm done my kids are going to be teenagers so maybe they'll be finishing it off
A friend with older kids built a playhouse and his tip was to build mine with adult headroom and 25 years on we're still using it. I think its a smart move building a cyclekart not a kids size, at least not the size they are now. Hopefully you'll ALL get to finish it and enjoy it, and others down the line.
Amazing video and project - new sub. I'm a moto guy brand new to Cyclekarts so this is like university for me. I understand moto rake and trail but now we add another axis in too - interesting stuff. The answer to "if there's interest, I'll do more detailed videos" is a resounding yes - if you have time and would do that for us.
Thanks mate! Be aware that I'm not doing the normal CycleKarts thing, I'm going a bit over the top with the engineering on some things so just keep that in mind. But the theory will apply to any car. If there is an area you want more detail on let me know and I can add it to a future video. The only caveat is that I'm slow at releasing new content as it takes me ages do the editing so it might be a little while...
Probably the best explanation of articulated independent suspension design I have ever seen.
Thank you
Another producer who talks over music, why? why? why?
Hi Joe, Im very new to this so I'm very interested in your feedback. I try to keep the music as low as possible so it's not a distraction. However can you elaborate on your comment, what exactly about the music frustrates you?
Joe...have cup a tea and a lie--down. I thought it was absolutely fine. Can't please everyone huh 🤔
Thanks again Phil., and keep up the good work. Looking forward to new installments, and I"ll try not to go off half cocked again
All good man, ask the worst thing to happen is we both learn something 😜
Where did you come up with 40" for width?
Hello, I got it off the CycleKarts Australia Official Facebook page as one of the 6 standards for CycleKarts in Australia. It specifies Maximum 40" track width from outside of tyres.
Hello, I got it off the CycleKarts Australia Official Facebook page as one of the 6 standards for CycleKarts in Australia. It specifies Maximum 40" track width from outside of tyres.