Recent content by JohnFM3

Is there something I am missing?

Any other insight for me too follow?

Ok, so in looking into this, I have come to some decisions I need to make. Considering the following.. At max final output RPM (wheel), I need 336 rpms Can someone explain why I wouldn't want a 1:1 ratio at the axle so that drive line speed matches axle speed? In cars such as my jeep, the...

I don't know if you have ever been Wheeling, but we feel we need Bullet Proof due to terain. We want this to follow us in the trail, and needs to be able to take the abuse that Wa trails can give it. Further more, I have seen 1 optmia blue top run a winch on a jeep with a dead engine up a 35...

If I have done my math correctly There is 63 360 inches in a mile. 10 in tire has 31.4 in Cir and would require 2018 rotations per mile (33.6 rpm's) 15 in tire has 47.1 in Cir and would require 1345 rotations per mile (22.4 rpm's) (assuming 1mph on both above numbers) So I need a max...

Ok, so I just had a thought that I need to learn how to figure out to assist in the beginning design. How to determin RPMs needed at the axle to meet the desired speed. The speed may not be abtainable via smaller tires due to input RPMs needed. May need to reconsider tire size. Hmm John

I want to build a buddies son a Rock Crawler out of his Power Wheels Jeep. Mainly as we just finished the 74 CJ 5, and his son is trying to treat his power wheel the same way his father (my friend) treats his jeep. So we figure its time for a real metal frame and tires. Heres my question...