I'm not an aerodynamics expert either, but I am an aerospace engineering student who is big into race cars and I might be able to weigh in a bit on the aerodynamics. I think the current body you are using produces a lot of lift, we can see a pretty good side view of the body at 13:25. Lift will be generated behind the driver pod and behind each of the wheel wells as the body slopes downward. This produces lift by creating low-pressure vortices behind these elements which will suck the car off the ground thus producing lift. Real race cars and road cars alike run into this issue as well (If you've pushed your car you feel a pretty distinct moment where it becomes very uncomfortable and skittish at high speed, this is the point where the car is producing enough lift to make it very light relative to the ground and it feels very unstable). Race cars offset this with increased rear and front wing angle, which is trading drag for downforce, but since this is a high-speed car obviously you don't want to create a lot of drag. You should look into getting the lowest drag body you can find and focus your downforce creating elements on the bottom of the car, taking advantage of side skirts, venturi tunnels, and huge diffusers which real race cars are banned from using since they create a ton of downforce and very little drag. If you want to stick to this more traditional LMP looking body you can help manage the lift biggest lift generating structure (the pod) by using a thin vertical wall that runs from the apex of the driver pod to the wing, this is what modern LMP cars use if you google "LMP car" you'll see what I mean. I'm loving the project, I cant wait for you to smash the record!
I feel like most engineers watching these vids just cringe. You have a great write up but this bloke is simply not interested in hearing what others have to say. He reminds me of my management....throw more MONEY and POWER at the problem, that will surely fix it.
@@Popomcgo It's not that he isn't interested. Kev is a VERY smart guy, if he starts talking aerodynamics for 10mins during his video he will lose views. Sure, you engineers might find it super interesting but the majority won't. He almost never waffles on about minor details for anything. It's how he makes his videos :)
I have been running MGM for over 10 years now and they are awesome. Martin at MGM is a pleasure to work with as well. When I first made the switch he took the time to face time me and go over all the programming settings. The amount of settings on them are insane especially when setting up for boats. Good luck man …….
Don't forget how it all started and my personal favorite: "Let's see if this works...." Love watching Kev and friends have fun and smash records. Just not cars this one time.
Kev is the reason my grown backside bought. Typhon 6s and started tinkering with it. Kids and parents come up to me in awe!!! Can’t wait to see you smash the world record with this. Thanks for everything man
A guy by the name of Matt Marshall from Ottawa, IL (USA) actually did a very similar setup as this using the exact same ESCs shortly after they became available, and used German, Lehner motors directly driving spools as this also--and while I don't know what the current speed he is at, the last time I saw the project he was producing a central motor mount for a solid fuel rocket motor to assist the electric motors. Really, no joke. The rocket motor can only fire once before requiring a new one, though. Very expensive per top speed run. He said the rocket motor would arm if all was going correctly in the run, and then auto-ignite at a specific speed once armed, taking the vehicle to maximum speed (or possible destruction)! I'm going to tell him to contact you, some how, as your projects are very similar.
I don't like being sceptical, and I really do hope it does get at 203 without taking to the skies :D But I doubt it will in its current configuration. Will be a bloody good show though!! And who knows, Kev might get lucky :D Here is hoping :)
@@rafaellozanosolis1338 Very true, such endeavours always are 🙂 That's why my comment only targets its current form. The wide body relatively short le Mans style racecar with more power than the sun 😂😂 and 600mph theoretical wheelspeed 😁 Will enjoy seeing Kev attempting to get that thing up to speed. Cheering for ya Kev!! Drive the wheels off of it 😁😂
Hi Kevin, here are some ideas on increasing speed once you get to about 150 mph, aerodynamics becomes extraordinarily important, just as important as power. -ideally, change your whole body design to being more long and skinny, if you look at land speed record cars you will see what i mean. -But since that will mean a complete redesign, here are some ideas to improve your current car: -ADD A TAIL!! This sounds really weird, but extending the rear of the car out to a gentle point increases aerodynamics extraordinarily, because it eliminates the low-pressure area behind the car that pulls it back. Lookup "aerodynamic tail" to see what I'm talking about. -Enclose the rear wheels. Tires cause a lot of air turbulence, and hence drag, especially since you are using foam tires. If you can figure out a way to cover the front wheels too, that would be great, but it might be harder since the front wheels have to steer. -Change the batmobile-style rear fins to just regular fins. Again, turbulence. -Try and replace as many parts as you can with carbon fiber. You are right in that weight really only affects acceleration, and not top speed, but you are going to need decent acceleration if you want to get over 203 in any reasonable amount of space. Also, figure out a way to gear the thing down. I remember you said in a previous episode it was geared to 600 something mph. you are going to need more torque to get through the air at 200 mph, at that speed air is very "thick". Gear it to like 250 mph. -Finally, if you start to have issues with the motors overheating, consider adding small air scoops to direct air at them. And by small I mean SMALL! like 3/16th of an inch tall, and maybe 1 1/2 inch wide. No bigger, because they will cause too much drag. At 200mph, plenty of air will pass through them. Also, make sure the air has a way out, otherwise air will build up inside the body.
Yeah. He's not scientific enough about this. He needs to read up about this stuff for sure, even just the people on places like arrma forum who speedrun limitlesses.
I have to say I was skeptical at first but this project does look more and more promising as each video gets uploaded. But I do think kev you're getting caught up in the moment and not thinking about how to expand this idea in the future. You need to test these Ideas as soon as you put on modifications like the new ESC's or the new plastic chassis because one wrong move and it is back to the drawing board,I get that glue needs to dry but the same principles apply (not a hate comment just trying to help)but I think you also need to fix other problems, for example friction if you have seen my previous comments on this project you will see my concerns regarding the problem(once again and I know you didn't ask but I'm just trying to help I think we can all agree we want to see that RC car break the world record)
I firmly believe he knows exactly what he is doing. The version being presented to his viewers is more of a journey to 203 ( if he makes it) but in reality he knows what it will take to get there he is just going at it from a model of upgrading like most rc people do. He could probably slap something together in 2 weeks and be done with it but for something so expensive and monumental he wants as much traction online as possible. Between this and his eBay stuff he needs the content to pay the bills so to speak. Im guessing 22 videos by completion before he stops this "series"
Good luck Kev! The only advice I have is balance every thing. And foam high traction tires. Like the 80mph 1/8 scale GTP nitro cars use. Air flow & Downforce like the 100mph outrigger hydroplanes use. You rock brother!
Kevin, you’re enthusiasm is contagious. I suggest that you not cut out your the wheel wells. This will allow the air to smoothly pass along side the car without entering and exiting it creating drag. You may have to use body mounts to extend the body outward, but I hope it works without that. Do not drill any unnecessary holes in that belly plate. You want is as smooth as possible. It may add three minutes to disassembly but it is buying you mph. Best of luck! I will be watching. I look forward to checking out your eBay special because being broke sucks.
With the effort you're already putting in, Kev, get a whole new custom chassis made up. It will make things easier to work on, it'll look better and it'll be more beneficial, I think. I'm enjoying your progress with this project and already looking forward to the next update on it. :-)
Agreed but after reading that email from the guy who’s got the current record there’d be nothing better than beating his 202mph with nothing more than an off the shelf car just with a little added POWER!!!! His thing doesn’t even look like a car so the more car like Kev’s looks the better 👍🏻
not with stock tires that handle 120 at best. LOVE Kevs effort but HATE peoples optimism as to how stock cars are going to handle double design speed....
Some aerodynamic statement about this 200+project car, 1. It will have enough downforce thanks to ground effect. 2, it will have a really low drag, almost negligible. 3. The rear wing end-plates are there to reduce vortexes, 4. If something is to fail aero-wise it’s that because of the torque you tilt back on the rear wheels, reducing your only source of downforce. Which might lead to lift. Hope this helped someone understand.
Shes lookin epic. Loving the build. Good work! For the bottom plastic is it possible to have one end a tab kind of like a television remote battery lid and 2 or so dedicated screws and the whole sheet come off giving you chassis access.. idk just thinking out loud. . But thank you for correctly telling people the number of S's and clearing confusion. . Cheers. Best of luck on your way to 600 mph!!!
Won‘t work... That’s like trying to climb a hill in highest gear. The wheelspeed has to match the desired speed of the car. Otherwise, the motors just stall and the current is crazy high. That’s probably why the other ESC got demaged.
600 mph wheel speed in the air is one thing on the ground it is completely different you lose most of that he needs 203 mph wheel speed on the ground the objective it to have enough torque to reach 203 wheel speed pulling the weight of the car it's a balance you got to figure out easy on paper but a practical application paper is not always right easier said than done
@@chrisblanks1906 That's true, but he certainly doesn't need 600mph wheelspeed. The whelspeed without load (In air) has to be somewhere higher the desired speed, like 300mph without load to reach 200mph on ground. With 600mph wheelspeed, the motors will operate in a very inefficient area at very, very high current. Just take a look at the record holders vehicle specs.
Kev, I appreciate your sentiment in making this series as you are - Adapt, improvise, overcome. I appreciate how you understand it will take time to do this. What we here in the comments, the engineers of us anyway, are just trying to help you see what obstacles are coming along and to prevent them, or at least know what to do when they do arise. With the amount of drilling and modifying, you need to get this chassis re-made. The holes will weaken the chassis, and with the amount of power you are adding, you WILL end up with chassis flex. It will accelerate so fast that the back end will squat down and it will flex in the middle. One way to prevent this is to make it longer. A longer chassis will add to the aerodynamic stability, mean you can use longer venturi tunnels, utilise a diffuser, create side skirts too, keep the weight far more centred. You could even incorporate largely closed wheel arches to prevent air build up within the body and shape the tub directly behind the front wheels to move dirty air from tyre squirt away from the underfloor using a similar concept to Formula One barge boards. I'm not great with CAD or CAM, but there are people out there who could design and 3D print an updated chassis to utilise so many design concepts. One wrong move with the chassis, one hole too big, one ESC mounted too far out, and it's game over for the whole project. Your chassis or tub or whatever you wish to call it, is what everything else bolts on to, so you need to get it right.
Mount the wing to directly to the wheels so that all of the down force goes to the wheels and not shocks. It was banned in all professional racing because it was too good
Yes that's what mr mclaren was thinking 🤔 just before a gust of wind hit his special wing at speed lifting his rear tires in the air and flew his car in to a shed
@@bananasstuff3344 if the spoiler is tall enough and at an extreme degree of angle, it can actually become a wing lifting the car Some racing still use spoilers, F1 has front and back spoilers, bonneville salt flats let's people use them still
@@bananasstuff3344 no F1 cars use wings safely. modern gp motorcycles use wings for stability at high speed. Nascar use small lip spoiler. They don't go flying off the track because of some wind If the spoiler is made correctly, a gust of wind will not lift the rear wheels off the track. Old style tall and large spoilers can be dangerous
In other words that electric motor associated with those batteries generates a wheel speed that is about 600 mph on ground... that's why Kev Is about to change the Power unit
just some Ideas Kev 1) polyurethane wheels ? they used as racing car engine mounts, can be molded. shoyld be nice grip also 2) seing now you going to have all locked 4wd, steering servo only probably needs to turn like 5mm as sharp turning results to tumble wumble at high speeds. 3) velcro the front body splitter to the chassis incase at speed of 180mph and more a small bump and slight amount of wind gets into the front of the body will rip the body or cause some serious handling issues. 4) make sure the front of the chassis is lower than the rear of the chassis. measure from the ground to the chassis plate. make sure all the weight of batteries and everything is on the car when doing it. Eg: look at all drag cars. front is lower than rear so the front doesnt pick up air and flip the car. PS. Wayne from South Africa 🇿🇦
You’re awesome brother definitely learning a lot about R/Cs watching you and your character is hands down! Luv keep up the epic work looking forward to your next video 😁
Me too actually cause I have a GTR RC and I have a broken axle and it comes with a speed boost on the Remote controller and my brother broke the turning wheel on the Remote controller
Amazing project! Rooting for you mate! if I may suggest, building a basic metal rollcage around the ESCs...so if the car flips, you have some solid protection for them.
2 ways to make a car fast. 1) do it the right way with the right parts. 2) throw so much money at it that it has no choice but to go fast. this is definitely choice 2. i like it.
No Kev - Sorry but you can only go by the series voltage mate-the parallel cells are there to boost the output C rating - However if you call it 4/8/16 S with a x2 (times 2) on the end it doesn't sound any less powerful to me or anyone else who knows Ohms law. All the best.
Yeah. It's a little clickbaiting-y but I guess its not wrong... technically? I dunno. I suppose there are that many cells present, just not all of them are doing what he thinks.
lmao way to make it seem like Nic got in touch with you. Clearly the way the email reads, you got in touch with him first, asked for help, and now you're saying naaah I'll do it myself. WHAT?
Finally the record car video. U don't tell us how we need to do our jobs to get our rc better and u not judge. You do everything by your way and thats what I want to see. That's why I like your videos kev!
Kevin. Love the undertray 👍 if you were to drill a few access holes I think it should be fine. Locked diffs 👍 hope it works. There's always a chance that adding some skirts on the side of the chassis could help with downforce, it'll stop air traveling under the car and help decrease the air pressure under the car. Can't wait to see it go. 👍😷
I have 2 suggestions for you. You should try and put some bigger wheels on it and it is going to go faster but it is better than gearing because there will be no extra friction. Another thing you should try is film it in slo motion while it is going fast so you can see what is going on with it and what is slowing it down. I am positive that you will beat the record!
I have followed you since I got into the hobby and you are truely a legend mate! Love your entusiasm and the content you provide. ❤🍻👊 Wish you all the best with this project and looking forward to see you break the WR! Keep up the awesome work bro!
Kev, would love to see you paint up the 3 Corvette bodies as Red, White, and Blue. They are the flag colors of the UK & USA! Also, love you trying to beat Nic’s speed record all on your own....that’s how it should be, just you & your “mates” as an RC community.
