Traxxas Bandit - Testing Aero vs No Aero - Does Aero Slow You Down???
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- เผยแพร่เมื่อ 21 ก.ย. 2024
- #traxxas #rccars #gensace #powerhobby #3dprinting #radiolink #traxxasrc #traxxasracing
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Excellent video!
😎💯💢🤙👍
What an exciting video (for me anyway)! Thanks so much for doing this! Great results!
Here is something to ponder. The physics behind aero drag - if you double your speed there is 4x the drag. At 53 mph your gained about 2 mph vs without aero. You went 106 mph (just so happens to be 2 x 53 mph!) with your car with aero on 6s. If you could run it without aero (which of course you can't... maybe a lot of weight and a prayer would get you close though), you would in theory be able to do about 114 mph (2 mph x 4 = 8 mph 106 mph + 8 = 114 mph!). I may be oversimplifying things a bit but at near 100 mph the extra drag could be quite a bit.
Now, I am running the same front spoiler as you but trimmed down to 40% of its original size. The aerodynamics may be a bit different but lets just say I have half the drag you do on the front (my shocks may add a little so 50% seems fair I guess) and lets say the rear wing makes the same drag as the front (it may make more.... it looks more aggressive and has the mounts too.... but it is hard to say as on the back of the car there may be less resistance... IDK).
Long story short, I hit a best of 98.7 mph on 3s in my car and a typical run is about 97.5 mph (with some weight added to the front plus my mini spoiler). I am sure the weight slows the car down a little as it may make the voltage sag a little more during a speed run (but otherwise shouldn't have much impact on top speed). I bet with the front and rear wing I would be more around 93 mph on a typical run and maybe an all time best of about 94 mph. I guess I may have to test this.....
I was going to run the car today but I was busy and it was a bit warmer than ideal. I also, I am really nervous as my last few runs haven't been great. I get stressed out dong the runs lol. I wish I had a better road! Also, I am running the stock transmitter and range is an issue for me. I think at around 60 to 70 mph I do not have enough downforce and if I hit the throttle too hard, this is where I run into issues with the front of the car lifting (with my most powerful 3s LIPOs). At 80 and above I seem to have enough and the car is planted.
I will for sure get it out there in the next few weeks though! I play on cutting down the broken front spoiler to about 60% of the original size and see how that performs too.... should be interesting.
Thanks again for doing this! What are your thoughts?
All signs proved your theory!!! A down force is obviously necessary at these speeds, hence why most people just add weight and call it a day. Adding weight will slow you down off the line, but will help keep it planted at high speed. Where as the aero we are using is lighter and will be quicker off the line and keep you planted at higher speeds. The real question is how much down force is really needed??? The guy who posted the 3d files made them for a 2wd rustler, that body has more of a parachuting affect, and may need more downforce to counter act. Active aero sounds intriguing. I think having a variable wing hooked up to a servo mixed with throttle input could be useful. Could be possible at a certain speed you can have less downforce with a large enough surface area with it being almost parallel with the ground. Then again theres guys breaking 220 mph in a limitless with no aero like we are using. Just some horizontal stabilizers on a slip streamed body.
Regardless, I its more fun trying to make a slow car fast, then an already fast car even faster.
Hi! I'm not too sure what you are trying exactly, and it would be interesting to have an explanation about that. Litterally, we can see the difference between aero and no aero in a straight line. but aero componenets where iniatially made for turning at high speed, and can be detrimental in the straights. That's why LMP use low downforce, and why Chaparal tried some excentric variable pitch airfoils. ANother thing of interest, is why would you want these on a buggy? That's a cool idea, but that's going to load the suspention, and jumps are going to be much more scary (especially if the front wing generates more downforce than the rear wing). I think there's much more to learn from this experiment than just a 2mph difference. And thanks for the video! Best regards.
Sorry for the delayed response.
I'm by no means an expert, but love to tinker. I love the challenge in making something such as the bandit go faster, even though there are better platforms. What I have found, at about 80 to 90mph, the front end picks up and you loose control. Most people who speed run 2wd bandits and rustlers just add weight to the front and call it a day, I went a different route and 3d printed freely available aero from thingiverse. Another youtuber channel briansrcstuff thought adding aero was slowing him down as well as keeping his bandit planted. I was just proved what we both had figured out. My next goal is to figure out hom much does it actually need to keep it stable. I can't design parts for nothing, but have a few ideas I want to try.
I should have made this all a little clearer in the beginning. I just want to get to the fun stuff!!! Also its still kinda weird talking to myself in front of a camera, but I think I'm getting better!!!
Nice. That Velineon putting in work doing over 50 on 2s. Is it truly safe/bashable/repeatable/continuous running on 3s or 4s with this gearing? When you're "done" speedrunning it, do you think you could make a drift car out of it or nah?