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| FDR https://setup.teamxray.com/xsetup/legacy/viewtopic.php?f=101&t=19482 |
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| Author: | Anarizlock [ Mon Feb 06, 2017 19:07:25 ] |
| Post subject: | FDR |
I always be able to figure the FDR for 2wd, however for xb4 4wd with 1:2.5 ratio how do I do the formula ? the decimals are different ? (:) (.) AE SC5M 2.60:1 ratio Spur 84/19 84/ 19= 4.42 x 2.60 = 11.5 FDR for 6.5 motor XB4 81/20=4.05 x 1.2:5 ??? getting 4.86 fdr |
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| Author: | MarkBrown [ Wed Mar 01, 2017 10:06:00 ] |
| Post subject: | Re: FDR |
The internal ratio of the XB4 is 2.5 (35/14) , so the FDR in your example (81 spur / 20 pinion) is 10.125. |
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