what will this do?
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- Опубліковано 3 жов 2020
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p at has still not paid kev for the xmaxx
Hi
kevin We only trust you, do you answer RC questions?
BOOSTEDLASER YES I need help I have a 8S slash 4X4 ultimate 160MPH I need help which tires and battery’s doo you recommend
Cap packs are supposed to be closer to the esc so it detects a power drop usually happens at high speeds when there is a large demand for more power and battery cant keep up.it picks up that power drop. It doesn't really help with speed as much.
If the battery is able to deliver what the ESC demands then the capacitor pack won't offer any benefits. But say you have a 30C battery where the ESC can use a 60C? Then the caps will be able to deliver a higher current until they're discharged so the 30C battery can act like the 60C for a bit of time. If your demands involve a lot of brief hits the caps could make a good improvement, but steady state power won't be affected once the caps are discharged and may in fact slightly reduce the power due to their increased resistance.
Set up a drag race where the car/truck won't be able to do a back flip and all of the power available can be used....which would mean a small C rating battery. Install the caps and you'll see a much improved punch off the line while the top speed won't be affected because the caps will have been discharged by that time.
I think you are absolutely spot on. I think most of the people seeing differences are the ones using cheaper batteries. But if that really is the case then I would think you would be better off buying lower c batteries to save money and just using a cap bank 🤷♀️
And keep in mind real amps and amps on a sticker. When off or close a par of caps does the trick (shortly)
Also the cap should be the closest to the esc to work properly (that’s what they teach to me).
In my yeti it’s like night and day, so much more punch I can backflip it even weighting a lot.
I can guarantee you that this is incorrect.
Capacitors of that size simply lack the capacity to give you notably higher current, the entire point of a cap pack is for smoothing the voltage, aka lowering your ripple during high demand.
Also a lot of capacitors used in cap packs are known as ultra-low impedance, specifically to reduce the increased resistance.
I have a ridiculously big cap pack simply because I had a bunch of Rubycon ZLH's sitting around, I gain no top speed nor punch from it, it purely cuts my ripple down.
U have to agree with you on this one capacitors in car audio help smoothen out voltage drain from your charging system same with anything else it is to push more power out of the limited amps from the smaller cell battery. So my point to what I'm inputting is that a capacitor is useless unless you have a regenerating source. Now make it solar that would benefit it with a capacitor
Hey Kev, I run a capacitor pack and I can assure you, you will NEVER feel the difference because there is no appreciable difference in performance.
Long story short:
Capacitor packs are only to smooth the voltage going to your ESC, because under load your batteries are not a constant voltage and will rise and drop when used aggressively.
The entire point is purely to keep the ESC happier, it could be the difference between popping an ESC and not popping it.
When you slam the throttle it wants current and the capacitors are really good at giving that current with also something the voltage like you said
If you have lower c rated batteries it can help
Kev, you need to hit 88mph for the capacitor to work and take you back to the future 🤣👍🏻
Capasitor packs seem to be pointless more weight more things to go wrong
Capacitors are basically batteries but that can be charged and discharged at the same time.
Kev is going to hit 203mph!!!🥳🥳 .... just give him a chance, and he'll do it!
I predict he stops at around 100-150 mph.
Great Vid Kev. Your Xmaxx got some grunt. Capacitors really only benifit Speed run cars, or other RC cars pulling really high current. The Capacitors store energy, when you running at the ragged edge 'top' speed pulling lot of Amp draw, RC Car can cut power or intermittently cut power "Ripple" the Capacitors help Iron Out the ripple & prevent power loss, by giving that extra bit of Current draw when needed. For most applications you Won't notice a difference & majority of 150AMP + ESC's come with built in Capacitors that provide enough for everyday RC bashing. But for extreme bash setups & particularly high Speed run cars/drag cars they are very useful. Might be worth putting one in your 200mph project Kev. Best soldered as Close to ESC as possible 👍
Cap packs are more for speed runs. Have to have them soldered as close to the esc as possible. My limitless get over 100mph with a ripplekiller 27/34 max6 and blx185 motor. Struggles to get to 100mph without it
been watching your channel for about 2 - 3 months now and love it, not had a 'hobby grade' rc for 20+ years, but because of you im now the best part of £2k into it, i feel very new to it all and utterly love it, but thanks to you i am able to get what i feel is the best knowledge to realy enjoy this hobby and make many memories with my son that i will cherish forever, keep up the good work Kev, Gaz, Redditch 😁😎
Kev, the capicitors will help deliver a more consistant voltage for longer. If you were to watch battery voltage during current draw you would see that number fluxuate by millivolts. The caps help store batteries voltage during those voltage spikes and drops giving the esc a more consistant voltage. I think the idea In RC cars is this transfers to a more consistant battery and "eliminates" the battery sag.
How many have caught themselves yelling every time you crash your rc
"Oh no tumble wumble"
hahaha
Me too
I did the other day and my buddy looked at me weird... I was like.. No Kevin Talbot in your life? Do you even RC?! lol
@@anarchydirector hahaha love it that's a quality comeback👊
Every single crash is a "tumble wumble" for me now!
I suspect the extra weight of the capacitors probably cancels out the benefits.
Cheers
Jim
I love kev cos the kids are the bosses
Man....that truck broke both control arms😱putting down power😏🔥
Hey Kev, some info on super capacitor banks - You will want one for your absolute highest speed run cars, but its unnecessary for most offroad applications. Good ESCs already have a few super capacitors anyways. Take a look at the power wire side of your HobbyWing Max-6 ESC. Those 3 big capacitors are the same style found in that bank you have. There are only 3 caps on the Max-6 because thats all that is necessary for off-road racing and bashing. What capacitor banks do is stabilize the voltage to the ESC. Normally the voltage of a LiPo sags under heavy power draw (under acceleration and high demands like speed running). When you plug in a capacitor, the capacitor fills with charge until it reaches the voltage of the battery. Then, when the ESC draws power, because the high power spikes will hit the capacitors first and then the battery recharges them, this stops much of the voltage sag that is normally found. As you saw, in offroad its not a big enough difference to notice, but in 100+ MPH speed run cars that are drawing 100+ Amps under acceleration, those capacitors will stabilize the input voltage and make acceleration much smoother. But in the end, the input voltage is still the same so you wont see much of a difference in top speed. In most cases maybe 1 or 2 MPH on a 100+ MPH speed car. In offroad, you may see a slight nit better power because the voltage isn't sagging under acceleration. Hope this helps Kev, good lock with the 200 MPH car, you will definitely want a capacitor bank in-between the LiPos and their ESCs on that car to stop that voltage ripple/sag I was talking about earlier. I think the Limitless is a stable enough car to handle the speed. The real issue is going to be strong enough electronics to handle that power demand. Look into the Castle Creations XLX2. It is by far the most popular ESC for speed runners for a reason. It maxes out at 8S but can handle REDICULOUS amounts of amperage draw, with some people recording up to 300 amps on board. The KV of those motors is too high for 12-16S anyways and you need to focus more on amperage than voltage at this point if you want to go faster. 2 x XLX2 ESCs and 16S would probably be enough to push the car to 200+ MPH so long as you sort out the other issues.
!NEW SERIES SUGGESTION! - Speed on a Budget
You would do custom builds for certain speed brackets under a certain price range.
For example
30mph under 100
40mph under 150
50 mph under 200 and so on !
I think it would be a great way to do custom builds on a budget and it would attract lots of viewers! Plz like to Kev can see!
Hey Kevin, since you like crawlers you should check out the Lego crawler truck! Could be fun to mess with, maybe even convert to proper electronics and whatnot.
Today I love rc cars so much because of you kev. thank you for your entertaining video 👍👍👍
Super excited for that 200mph car, you are the sole reason i've gotten into the RC hobby lately, i bought my first hobby grade truck 2 weeks ago, i got a Redcat Volcano EPX.
Id love to get a Maxx one day! Little out of my price range at the moment, so watching you tear them up here will have to do!
From what I understand the cap needs to be soldered close to the eSC as possible. So, I plan on soldering 8mm bullet connectors, and put bullets on the cap, you can make bullet end caps with shrink tubes to test with and without :)
Hey Kevin you need to solder the cap pack as close to the esc as possible for it to make a difference.
These capacitater banks kick in when there is more power/current demand then the batteries can deliver in extreme situations. When your rig does standing backflips, then it is a clear sign, that you don't need such a bank. I theory such a bank protects the batteries more then it helps with performance. Any ESC has some capacitater build in and if you look at the small ESCs from the Arrma 3S and 4S line, they have some extra capacitater soldered to the battery cables as well.
For the general Basher you should get the same performance out of your rig without or you batteries are too week anyway.
There is one big advantage having not capacitater bank: fewer connectors that can come apart during hard bashing and this is one of the main causes why the rigs quit driving. And then there is definitely no performance until replugged...
😘
Great vid kev love the comparisons and tests
Capacitor packs can be much smaller and give the same voltage and (usually much more) current for a small period of time. The difference in current doesnt matter since the battery can supply the maximum current the esc handles anyway. Therefore the only differences are that the capacitor pack is lighter and is empty faster. In some cases less weight does matter and then the capacitor packs have the advantage.
Kev I really hope you get property and land soon it will be so cool
3:50 Traxxas tough baby!
I commented on one of your old videos on an Hbx Rampage 1:18 truck. I just bought one. Love it and will eventually get into larger cars. Love your videos and love your attitude. Cheers from Missouri USA. Keep making great videos and the whole world will get into RC or whatever you are doing! Lambo's, Monster Trucks, whatever!
In an electrical setup capacitors do make sense for example in FPV racing quads it is taking voltage spikes out meaning we have a way better and solid FPV feed the ESC's high power draw wont effect our video feed. In 4WD cars I see much less reason to have other than saving your ESC for high demand scenarios. The capacitor is like a reserve tank storing electrical capacity and smoothing out voltage spikes from the main power. I am not surprised at all you couldn't feel any difference. Maybe the ESC did. Many high performance ESC's already have several capacitors already installed. I hope my comment helps to put this one to rest.
Glad to see Jack Septic Eye is branching out
I love Kevin Talbot's vids! From Brisbane Australia! Kevin is so enthusiastic!
Kev when is the speed car going to being complete
It’s a working progress
I wacth his to see the speed car
yeah when is it?
no set date guys, its my hobby so not gonna rush it. waiting on the new esc's and motors at the moment
He says in the video at the end
The breakage sound effect followed by sad music and the car limping back cracks me up every time. Much respect for time spent editing.
The Peakeater stores electricity so that it is immediately there when you accelerate quickly. This protects the Esc
Title: What will this do?
Me: A lot of things!
Nice review on the tyres. I will get some when I get a xmaxx again !
Love your videos can't wait to see the 200 mile an hour car to keep me posted and updated I am officially a fan
Did you checken Out the Carten m210 chassis?
Ur the one that got me into the hobby
What did you start with? I'm also keen to start :)
@@rufflesal Go back to 2016 on Kevin's Channel and search X-Maxx.... you'll find your (clean shaven) answer there lol...Great Channel for Everything RC!! (And finding the limits of these poor X-maxx's lol....... and sub to Kevin's bash friends, Claire, 8S Steve.. all of them.. it's infectious and you'll love every second!!
Same
Nice Kev! great racing there!!
Love your RC cars
In case of ESC or PWM controller, the controller does not use continuous amount of current, but high frequency pulsing current, which may not be good for the battery. This is why there are capacitors in the ESC, I guess. So the caps might help, however, there should be a few ceramic capacitors in parallel to the electrolytic ones as the electrolytic cap suffers from high ESR and ESL. There should be an inductor as well, so battery, then caps, then inductor, then caps, then ESC.
I like how you are honest and you put how when something does not work or breaks on video and tell us viewers what not to get such as the new gopro
In theory adding a large capacitor pack can improve the voltage under extreme load but only for a fraction of a second, IF you have an extreme power system and IF you have lipos with a poor discharge rate and IF your a professional racer then maybe you will see a very slight difference for a fraction of a second, maybe. Other than that there realy is no performance benefit. As for keeping the ESC cooler and giving it an easier time, yes, there is some truth in that especially if your ESC does not have large enough capacitors fitted as standard, however, any decent ESC like a hobbywing for example has enough standard capacitance from the factory and will not benefit. If you have a cheap ESC that would benefit from the capacitor pack that frankly your better off spending the money on a better ESC rather that the capacitor bank. But full credit to Kevin Talbot for proper testing.
Kev in short the cap pack keeps a more stable voltage which will help out the esc and in alot of cases increase the life span of the esc. They are used for alot of speed run cars and at the hobby shop i work at people use them often.
The xmax gotta still be one of the best rc cars around for sure bro 👍👍
Love to see a ballooning comparison between new & old tires?
Capacitors were originally put in RCs to disapate heat. If you can remember back in the day of the Tamiya hornet they were at the back of the car and had little fins attached with a hot don’t touch sticker and it all connected to the “not esc” but “sc”
I’m not saying I’m right here but it’d make sense if these just absorbed the heat as energy taking the heat off the Esc helping prevent it get too hot🤷♂️🤷♂️🤷♂️
Great video Kev! I just replaced my orange xmaxx arms with the traxxas hd ones. I went orange upper and green lowers and i think it looks amazing.
Thinking about it, the capacitor pack basically feels like its trying to achieve what brushed motor setups have done for ages. with the 3 capacitor in parallel / series bridged. but with brushless setups, no caps 9on the motors. Since the Esc is a whole lot more efficient plus, brushless takes the loss from voltage spikes and drops when the brushes get hot and brittle, eventually breaking apart slowly.. I dont think on a brushless setup the capacitor pack would make any difference noticeable in speeds or response. Possibly like a Fuel Surge Tank used on drag cars, perhaps the capacitor pack works in the same manner... Im curious to see how it would affect an brushless motor setup. VIDEO IDEA PERHAPS Kevin?????? :D
As far as I know, about the only thing the caps do is smooth out the power delivery, especially in terms of spikes in the current. Saves you esc’s from getting popped. I’d have thought more useful for your speed run cars for consistency.
Nice Kev, I'm going to get one for my channel!!!!!💪🏿💯🔥
Meh I’ve never seen a huge difference with them, I had a x maxx with one and it didn’t seem any different, but those tires are sweet kev
MGM has always taken good care of me. They should be able to set you up with whatever you need. 15 hours in my truck is insane amount of power.
Can’t wait to see what yours does with 2X powder.
Keep up the progress.
Hey thanks Kevin. I been wondering if ripple killers did anything.
That's a really cool track. Looks fun
I just started watching some of v2 Vids videos and just noticed the sticker in your X Maxx
Yes! I'm early, hi Kevin. I hope you see this comment, you are my inspiration and you helped me get started with RC, I don't have a lot but I managed to get a Luctan s912, I'm hoping to get either an scx24 or the arrma granite when I save enough, thank you so much for getting me into this amazing hobby and I LOVE your channel.
The capacitor bank helps when you slam on the throttle and do standing backflips because the esc wants current and the capacitors are really good like 10x the lipos at giving that current
Hey Kev capacitors don't make it faster, it is a battery saver. They store bulk energy and deliver it rapidly without putting that strain on the batteries (stopping them overheating).
Congrats on 750k subs kev! Hope you get the 1M soon!
thanks bro
Those skyrc gps devices are tough, I wouldn't worry, haha. Mine has slid down the road, been in three pieces, and still works.
I use super capacitors, but for a very different reason. I am powering a crawler with two 18650 cells (because its super light weight and i just wanted to try it), and those batteries can only put out 5 amps. So i put some super caps in and it runs full speed for about 10 seconds then gets slower. But with a crawler, im almost never running full speed so it just feels normal. I dont think your xmaxx is battery limited like that, so you shouldnt see any difference. You could run some really tiny 1000mah batteries though and it would run just like 5000mah batteries for a few seconds. I cant see how thats useful, but it might be fun.
Nice Kevin's xmaxx and kraton!
Kevin, You nearly were beaten by that 1/8th Thunder Tiger (Red and White) in race at 5:36, 4s 1/8th giving you a run for your money!
Haha I spotted my car, myself and my 144001 truggy in this video 👀 good to meet you finally last week.
All the capacitor bank would do is store power for quick bursts and smooth out the power during high demand situations. You would have to be hooked up to a computer or meter to see the difference having the bank or not.
You need to upgrade the rustler 4x4 with the new sledgehammers. It can do a STANDING BACKFLIP on its stock low gear! (I would recommend the low gear bc the electrics get hot even on low gear regardless of my fans) I am running a basically stock rustler 4x4 with tekno driveshafts, sledgehammer tires, and powerhobby fans on 3s. I love you kev!
That sound when you roll an rc over!!! I just painted up a new body for Schumacher, not gonna be long till I roll it over though seeing as I run it on 3s all the time.🤷🏻♂️
Cap packs should protect the esc from shorting out or cooking. They shouldn’t change any top speed or performance. You should see a change in the log reading.
Hey kev, can you make a video about how you clean your cars?
I believe in you that you can make a 200mph rc car kev😀
I'm guessing but maybe you could see difference with some rubbish batteries?
the capacitor will also protect the esc from voltage spikes and is really good to have if you go 6s and beyond also reduces signal noise i believe
For bashing I don't think they matter. I think they smooth out the power for speed builds and the ESCs last longer
Love these videos kev keep it up ❤️❤️🔥🔥🙌🏻🙌🏻 you should try the proline belted trenchers I love them i use them on my rustler Vxl
It’s about time you reviewed the capacitors.
I've seen differences with capacitors on track cars. The capacitors make the brakes stronger
Made a difference when you did that flip..
If you have batteries with a high current rating the cap packs won’t do much. However if you have typical 30c or so batteries and each is capable of higher current the capacitors ‘can’ help. The ESC already has power capacitors but the higher value and lower ESR (series resistance) of multiple caps in parallel can help under load.
Cap pack are for over gearing an rc to protect voltage drop to the esc so the esc won’t melt down but adding speed I don’t see it either 👍👍💯💯💯
Yes, capacitors do improve the truck.
Seems like there might be a little more "punch" with the caps but top speed seems the same
Just a pleasure to watch ur videos no matter what the content
Kev keep up the entertainment mate👍🏻👍🏻
Love you're vids can't wait
That literally just happened to me last week where my drive cup broke in half. It didn’t even damage the dog bone but it did put me out of commission though
if that is a LOW ESR Electrolytic capacitors they are great to clean the electrical noise and absorb voltage spikes to prevent damage on the ESC but need to be connected as close as possible to the ESC.
I think I heard Vinny say that the capacitor causes X-Maxx a-arms to suddenly break!
Those wheels look a lot better
kev the cap pack is used for reducing ripple voltage: when you pull the throttle the battery voltage drop a bit 2-3 volts (depend on the battery and on the stress put on the electronics)
and 2-3 volt less are equal to less rpm, look at fpv view of a drone, you can see the voltage and observe how change on high acceleration
.....but we dont use caps in FPV for sag compensation; we use them for filtration, especially from the absurd amouny of voltage spikes caused by the motor braking which which backfeeds huge spikes through the system and upsets the gyro, cam and vtx.
There is literally no reason to use them on an RC car unless your BEC can't provide enough current for the servo and rx combo causing brownouts. A combo notorious for that was Castle + Savox + Spektrum. The Castle BECs were always weak and the Savox servos would always glitch or brown out with Spektrum rx's.
I dont even know why these car cap packs became a thing when most ESCs have sufficient size caps already in them, which is compared to a drone which as the drones got smaller and lighter took off the aliminium caps and went to ceramic smd capacitors to suppress more spikes in an environment that requires a far cleaner signal.
If people even need a cap for their RC car just put it on a JST out of the rx.
@@grounddodger3212 thats right most of them, but for speedrun they can be useful
@@edoardos6426 nah, not on something like these cars. The batteries are huge compared to what we run. The reason we care so much about sag is because we try to throw the smallest battery possible on a quad and them whack 4 motors on it that ask for as much power as a 1/8 scale racer or 1/6 scale basher.
The amount of energy those caps can store vs what the battery can put out would be neglible at best.
FPV quads just abuse batteries. The batteries in these cars dont cop anywhere near the same flogging
@@grounddodger3212 im not the One Who use them Just check Philip jolley he use them
Stop stabbing the gas. Smooth application of power, boys.
Hey Kev! Thanks for the Video and the Review of the Cap-Pack.
I wonder if you've connected the Cap-Pack correctly? At 1:14 I can see (well, at least think I can see :)), that the positve pole from the left LiPo is going directly to the ESC. Additionally, I can see at 1:13 (again, at least I think I can see) that the positive pole from the right LiPo is connected to the negative of the Cap-Pack.
Long Story short: As far as I know, the positve and negative pole of the Cap-Pack need to be connected to the positve and negative of the ESC. It must not be inbetween the LiPos and the ESC, but in parallel. But again, I can barely see, what's the complete wiring. Was just wondering and didn't wanted to hold it back. :)
Have a nice day mate and enjoy your hobby!
Best regards from Munich, Michael
Ur the best kev you are the reason I watch UA-cam
All they will do is reduce voltage drop when you hit the throttle, no additional power. I would think it will make a partially discharged battery seem like it has a little more juju left in it, but not much.
They are there to reduce voltage ripple. Something like that is more for a short burst run
Try a tough burnout. In a burnout, the esc is stressed. It may help. Try it out.
It should maybe make a difference if you have low discharge rate batteries. The caps have a much, much higher discharge rate than any battery, but if your setup is already limited by the ESC you won't see a difference. So try some smaller batteries, and you should see better acceleration with the caps.
Keep at it you can break that speed record to , maybe the cap packs could help with the speed cars esc's.
Kev, do u tape up the holes at all on the rims? Def helps on ballooning.
From watching with the kapister when you had it on it seemed more stable
Cap packs i thought were there to prevent power spikes which cause things like servo glitches and burning ESCs