dilemma

[dodgydiy]

been working on my latest mid 2wd buggy, an update of my previous homemade job. the old car weighed in at 1366g and needed weight at the back to bring the balance rearward, added 150g around rear gearbox to get close to 60/40. the new car, without body as i havent even thought about what the body will look like, gives 60.1/39.9 weight distribution, and balance side to side within 5 grams. all up weight is 1299 grams so i need to add 175g to just get up to the weight limit. big question is where do i put it!!! three options really, front and rear, front rear and centre, or as much central as possible. have to say though its going to be fun finding somewhere to put that much weight!

[rcjunky]

you want all that weight right where the car balances on a pin and as low as possible. Using tungsten would be best I would suggest a heavier main chassis but you and all that weight in the center to make it agile, which is why mid motor is popular, its not so much the weight bias.

[alex97]

If your using heavy metals I suggest you get some osmium as its the densest metal in the world

[dodgydiy]

somehow i think i will be sticking to lead and brass....lol heavier chassis isnt an option because its a carbon tub, was thinking of a brass plate under the battery/electronics and a lead centre weight, although was wondering what the overall effect would be of weights front and back

[rcjunky]

the further forward/backward it is, the more swingy it will be, no good. Further out will increase roll

[RogerM]

Love to know how you got it that light in the first place!

[Peakey]

Originally Posted by alex97

If your using heavy metals I suggest you get some osmium as its the densest metal in the world

It's also brittle and damm expensive

[dodgydiy]

well heres a couple of pics. new car next to the old, new one is a bit longer, thinner and motor and battery a bit further back. weight distribution is much better, the old one needed a lot of weight at the rear to get near to the magic 60/40. also gone back to a pretty much standard b4 front end instead of the tc3 rack. rear end has changed quite a lot, its now more easily adjustable and contains a lot less parts overall, tc3 gearbox instead of b44 brings the spur further back and allows braces to be to the side of the gearbox rather than over.

the old car was quite a safe, easy car to drive, but propably lot that quick overall, exceeded its drivers abilities though..... the new car is a lot more responsive and seems to generate more grip overall, just need a bit of time on track to try and find a good setup, and also to design and make a bodyshell for it.

[dodgydiy]