I'm building a (what I hope to be) high-speed car using two PF-XL motors together and some gearing up. However, there's a point where I have to rotate the axle with power (that comes from the 3 speed gearbox) 90 degrees to line it with the wheels (this is probably a long way around the barn to say it in english, but I got a picture to fill my lack of words). This is what I want to do:
(the position of the gears is incorrect: in my project the 8t gear would be one hole to the left)
My question is, assuming the structure holding the wheels is solid and won't bulge, what's the best gears to use so that they won't snap?
So far I've considered four combinations:
- The same as the image, except the 8t is a 16t
- The fat 20t with the fat 12t
- The skinny 20t with the skinny 12t (this one doesn't actually work for me unless I do some changes to the car)
- Two of those 4t gears that aren't very smooth
It stands to reason that the last option is the strongest because they don't snap unless they break apart. However, they're more suited to low speeds. With high speeds they aren't fluid at all and make a lot of noise. But my biggest problem with them is that they sometimes get stuck (the gear without power sometimes stops in a position where it blocks the gear with power and when the motors start again they can't rotate - this is really bugging me).
So, excluding the last option, what do you think?