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Re: HyperDrivin' an Ultima box
Posted: Fri Jan 29, 2016 1:53 am
by Mr. ED
bdrmbully wrote:Ah the good ole hyper drive. I had a track master belt drive in one of my older ultima.
Much better belt on that. And you could add an rc10 hyperdrive on the spur side of it.
Oh, that's right. I did something like that on my early ghostrider
Re: HyperDrivin' an Ultima box
Posted: Fri Jan 29, 2016 4:11 pm
by tamiyadan
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Re: HyperDrivin' an Ultima box
Posted: Fri Jan 29, 2016 6:17 pm
by Typpo
fredswain wrote:Grunger73 wrote:
I designed industrial belt and chain drives for oil drilling applications for almost 5 years. The problem with the hyperdrive and most belts on rc cars in general is their size. They are undersized for the power levels. Size them properly with a wider belt and they are quite strong and reliable. The parasitic drag is always going to be higher with a belt than a gear. Even a gear system that changes to a right angle such as modern shaft drive 4wd cars. A proper chain drive, in spite of it's other shortcomings, has less power loss than a belt drive. There is a wonderful shock isolation characteristic of a belt drive that makes them very smooth but unfortunately since they require some form of tension they add a side load to the shafts that they are attached to. It's all about tradeoffs and compromise.
Based on your experience, can you recommend a reference for calculating an appropriate belt width for 1/8 and 1/10 scale off road?