New hi-speed project

[BrianG]

Yay, the car came in! Despite Ofna's site saying it only comes with the single speed tranny, it actually does come with the two speed. The slicks will have to be replaced with foams or something as I can tell they're gonna balloon like crazy. Quality is really nice at first glance.

It's gonna be a huge vehicle though! The chassis is normal size, but there is a lot of space in the front and rear ends of the shell. I'll be able to make a little shelf in those areas to add weight as needed for traction and to help compensate for weight distribution somewhat.

The first thing I'm gonna do is make a new brake servo plate. The existing one leaves no room for the motor. So, I'll fab up a fiberglass sheet and cut out a new plate. Don't know yet if I want to just push the servo out to the side more or re-orient the servo so I have room to use a motor adjustment tool.

The receiver box acts like part of the rear bulk support, so I'm gonna have to fab up a new system for that since it's coming out. I'll probably use aluminum for strength. Fiberglass is strong, but flexes too much.

There will be plenty of room for lipos. I measured roughly 210mm long X 60mm wide X whatever mm tall, and those are conservative measurements.

I won't be able to hit the speeds I want with the stock spur clutchbell options. So, I'll have to mix and match the spur gears as needed. Because the spurs are specific to 1st and 2nd speeds, these are my options:
1st gear: 49T and 47T
2nd gear: 45T and 44T
Also, I need to find spur/pinion combos that will maintain the proper mesh for both first and second speeds. So, I was thinking of using the 49T spur for first, and the 44T spur for second. If I use a 20T pinion for first and a 25T pinion for second, I can attain theoretical speeds of 93mph and 130mph respectively. A little short of what I was hoping for, but should still be fun!

Sorry, no pictures yet. The camera is currently unavailable.

[BL_RV0]

u should enter it in the Radio Controlled Car Action's Second Annual Fastest RC Car Competition.
check out the vid, its nic case with his brushless tc3 winning. 134.4 mph.
http://youtube.com/watch?v=yI5xLNeNDO8