clearconcepts
Posts: 64
Joined: 2/24/2004
From: Creston, IA, USA
Status: offline
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Man, there has been way too much talk of going 100mph like it's a piece of cake, just a matter of a new motor and higher gear, etc.
Like 99% of guys think their cars are faster than they really are, and very few really know how difficult it is to get an extra few mph over what they have achieved so far. Going from 60mph to 90mph will take something like 2X the horsepower... it gets progressively harder to get faster. There are technical formulas for this that I don't know, but I have read before from others.
Basicly... it's the same reason why a mustang or corvette can do maybe 160-180mph with 400hp, but it takes 700 or 800hp to squeeze a 200mph run, and twice that, like 1500hp to get to 230-250mph. These are not actual #'s but if you look it up, that's the way it works.
Besides getting the motor and batteries with the power to go 100mph, there is the major problem of keeping it on the ground, and in one piece. You can't run 80mph down most neighborhood streets... they are way too rough for a pan car. There is no traction, and once you get it going that fast, it can go airborne with a little bump. I have a 1/10 pan car... i know how squirrelly they are on streets... it's bad. Even a good stock motor can be touchy to keep the rear from swapping with the front when you accelerate.
At 100mph it's so fast, the body will crush in. Check out Cliff Lett's 100mph cars... he had to reinforce the body, and make sure the car ran perfectly true, etc or it was uncontrolable even for a professional. I have a video of one of the Insane Speed Runs at a high bank oval race where he did 97mph. Most of the guys trying to make the speed runs had touble controlling the power to get it up to speed, and once the got over 70 or 80 some have mechanical failures... or wipeouts and blow-overs.
BTW, I don't think rubber or capped tires will hold together at 100mph... they might shred.
Yes, it's relatively easy to strap in enough horsepower to do 100+ now with all the brushless motors and Lipo batteries. But even then you will need a special place to run it, and good aerodynamics to keep it on the ground. Heck there's a video of a boat doing 120 mph on finedesign's site. I'm sure a car can do that too... but it's not so easy as it's being made out here...
Good luck, and post some videos if you get it to work. If I get some lipos and a gps I might have to find a good smooth place to run and see how fast I can get my 1/10 pan car to go.
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RE: 100mph? - 
