RONNEFALK Speculation by Lefty, JQ just wants to talk PISTONS and how they work!
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- Опубліковано 14 лис 2021
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Love what you're doing for the sport
Man, another great explanation of how things actually work! I’m a guy who is not quite fond of troubleshooting, but when you have this knowledge of how things work, fixing them is SO much simpler! So for the information that you provide it’s absolutely fantastic to have these videos! I have a particularly strange, to me, issue with my Revo. I know this isn’t quite the correct place for such a vehicle, but it is suspension related. My front shocks, after I changed them to long travel, and added any and all components that would be of use in making it function properly, it’s doesn’t. The strange thing is, when the wheels are off it does. It travels quickly and with zero issues. I’ve changed nearly everything I can without actually swapping out the brand. As once the wheels are on, they’ll only travel about halfway back up. And again, with the wheels off, they snap right back to full motion. The rears don’t have the same problem. My very well educated friend in the sport said I may as well just go with a really heavy shock oil, and prevent them from full dampening. I haven’t yet gone to that extent. As it works well without those darned wheels, and last I checked, I kinda need them to run the truck. So, if anyone out there has any possible answers, I’d love to hear ya!
And once again, my second video, and I’m left completely satisfied! Keep doing what you’re doing!
Thank you for making these videos. Very useful.👍
Course is more useful!
Another interesting video! Thank you, JQ! 🖒
If only I learned this years ago...
I think it’d be nice if you made a video on tire selection. There’s actually not much really good info on it on the internet. And the brands’ tire selection guide isn’t very intuitive sometimes
I agree, a video on that would be useful to many of us.
The greatest man to grace the RC scene. Mr JQ
Another great video.
Great information, and very useful keep coming with it bro A+++++ video 👍💪
Naah I wont. You need to get the course!
Very informative, thank you. I'm curious, what range of shaft velocity (say, in mm/sec) is considered low speed for RC vehicles?
Hey jq, also very wrong kind of engineer here (civil) but your idea of angled piston holes having an effect on the characteristics of the shock package might make some sense actually. Once you said it, it took me back to out version of fluid mechanics where we calculate Hlf or head loss due to friction, and depending on the shape of the fitting/pipe a greater/lesser K value would be applied. We typically apply this for pressurized water/sewer conveyance systems, so if we think of the angled hole as a different type of fitting (a straight pipe vs a 45degree or 90degree fitting) there would be some minor losses that could add to that slightly different feel. Not the best engineer, but it did remind me of that and I thought possibly it could have some applicable theories 🤷🏽♂️
JQ, love your videos! I’m just getting back into R/C and found invisible speed. I will be signing up for sure.
Now we have a special offer👍🏽 If you joing the course you get a FREE new book. Check it out invisiblespeed.net/index.php?route=product/product&product_id=61
@@invisiblespeedrc awesome, Going to sign up now! If you ever need a software developer for the channel or invisible speed, hit me up! That’s my true profession, with R/C as my hobby (wife would say addiction). I actually do robotics and vision as my specialty but can build anything you want.
Great content. I love the idea that we can quantify the low speed and high speed performance from a piston. So I decided to make a spreadsheet with the AE 13mm pistons. Most of the pistons are 2mm thick, but they make a 2.5mm thick version. I understand what the 2.5mm pistons will do for high-speed dampening, but how would we quantify that? Maybe add 20% to the circumstance to compensate for a 20% thicker piston? It can't be that easy, right?
So u use the conical angled hole piston with the flat side down?
Hey jq...do the pistons have to fit snug in the bore of the shock body? There should be a slight gap between the piston and shock bore correct? What should that gap be?
Dude. Awesome video as usual
If you ever come to Connecticut please make a post my wife and I would love to have you over for dinner/drinks and a real learning session
I’m the car builder and my son is a two year driver. Stock buggy/mod buggy/ st truck 24:09
Great video, however im getting a little lost. On the xray xb8 nitro buggy the kit comes with 8 hole 1.2 pistons in the rear...with these pistons u would really jave to go heavy in the oil to stop the rear from dumping. So alot of the guys run 6 hole 1.35 in rear in instances where more support is needed. I even felt like the car had more pack and support. Shouldnt the 8 hole technically give more pack and support?
Fluid dynamics is non-intuitive. Given how many variables there are involved in car setup, unless you have access to an engineer experienced in fluid dynamics, just try different combinations.
I think DR to Mayako as well. He seems like the kind of guy to say f*ck it, this car has a chance at winning it all
i expect that DR might go JQ but i dont think its for the performance of the car lol. anther JQ designed car... because thats gone well in the past lol
@@MrSupermugen It has gone well in the past. And The Black Edition is among the best of the 1/8 buggies. Go somewhere else if you dont like JQ car.
@@daveshank1921 What? JQ himself said on a comment on Facebook that the buggy was shit, hence the big change... It drove horrible and had the worst QC ever, had some cool designs like the centre diff etc but didnt have the quality to back those designs up.
What? we seen mass improvement when the white edition came out then it didnt really get any better, when you drive a proper car like kyosho you go "oh shit ive been missing out!" instant invisible speed aboard a kyosho.
@@MrSupermugen idk, the car seems good. Mayako seems better
MrSupermugen must be a Drake fanboi that got butthurt and tries to troll every video with delusional lies. Get a life
As an M.E., coming from a mass-spring-damper point of view, I think quite a lot of people don't understand the difference between the spring and the damper.
It's explained in the full course. Each separate part of the suspension has it's own video.
I’ve always found less pack to give the car more movement. On high grip the car is too reactive with less pack. 8 holes seems to calm it down and limit the motion of the chassis. You can try and get the same LSC “feel” on the bench but on the track I think the LSC is actually affected by the amount of pack you’re running. When the track is loose and I need the car to react faster 5 holes, when the track is fast/high grip and I need more stability 8 holes
That is definitely the opposite. You need to run thick enough oil in 5 hole pistons, sounds like you are running them too soft.
Ryan, if it works for you then do it, rc cars have too mamy variables including driver input, shocks get effected by sway bars so much on our little cars its ridiculous.
@@MrSupermugen physics doesn't work uniquely for one person.
@@invisiblespeedrc see reply above, How much it comes into effect is determined by all the other variables...
Consider real racing, a bad driver's perfect car is far softer than a Good drivers - a good/drifter style driving may have stiffer bars to help the car rotate but in turn have a softer suspension package similar to the slower driver, You've said before, theres always a negative to a positive that law doesnt change no matter what where as physics is controlled by different elements, ie if something is hard, something else has be softer and in turn that then effects something else, look at Suspension arm angles you've changed a massive thing, how the bars roll the car, how the suspension takes small vs big hits(in your RC car case - slow and fast moving piston speeds, but how do you change the variable on high speed compression circuit? ie Landing a jump vs hitting fast bumps(again effected by the bars of moving the left and ride side more or less to each other), how the car will naturally squat and dive.
And as i quote JQ himself: " theres a big differnce between theory and reality"
Go Watch suspension dynamics used to create The gen 2 supercars and why roll bars/shocks are a controlled item, we are Currently in Gen 3 progress of which i was bought onboard to assist in the controlled suspension design, I by far dont know everything as every day we learn new things but I do know how physics work in suspension.
MrSupermugen yes this is true, for example with roll centers, or anti roll bars. But the effect of the setup changes and the physics are still the same. The requirements are different.
We had high and low speed damping with vrp game changers, but I’m thinking they got discontinued
Mantap bos ku semangat trus moga sukses selalu ya hadir menyimak bos ku
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While playing the engine, do not exceed a few degrees Celsius
What's the website to join up? Thanks
courses.invisiblespeed.net or invisiblespeed.net
@@invisiblespeedrc thanks!
Who actually makes thicker pistons these days? I’m not much of a fan anymore of the flapped dual rate pistons, would like to stay flat or conical and focus on thickness but it seems nobody is making them.
Of course it would be great to have dampers with actual shim stack valves, but how would you even begin to start educating regular racers, who have zero scientific/engineering background to be able to get even a remotely useful setup? I used to race motocross back in the days of 2 stroke bikes, just before shocks and forks came with high and low speed damping adjustment. Regardless, to do anything other than adjust the clickers, as in being able to make an objective and useful alteration would be next to impossible.
Are you suggesting that manufacturers give a basic shim stack setup, as how an mx bike is purchased, for example and hope that works for everyone? I think it’s far too involved and just way too many options with changing shims to alter the damping curves to be in any way useful for average racers. We would all just end up ruining the handling, imho. Far too many options and no real way to define what’s actually going on since it isn’t like you can actually feel what the dampers are doing at various parts of the track like you can in a real car/bike, we obviously have to rely just on what we can see the car doing, which isn’t nearly enough info. It’d be like trying to get a suspension tech to setup someone’s vehicle, car or bike, but only working from what he can see, as in no feedback from the driver. That’s a very hard task, to say the least.
What are you suggesting when you mention that no kind of racing vehicle uses dampers with the same, ancient design as we make do with? Shim stacks or something completely different?