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Ok, if you run the flux center shaft/gear in the x tranny, pn hpi100905, it is just like locking the X tranny in 1st gear.
With that tranny ratio and your 6s/1600kv combo you could run a 52/25 spur/pinion combo. That would get the motor well away from the tranny. If the motor mount does not have enough adjustment, you could go with a 47/23 spur/pinion setup and that would yeild the same ratio (about) I figured that you are using 40 series bowties (by the pics) which are around 5.75" tall. Set the motor and mount up with out a pinion, and place the battery in the chassis, adjust the motor as close to the battery as you feel comfortable (leave 1-2mm between) and measure from the center of the spur gear to the center of the motor shaft. The 52/25 combo would place the center of the motor shaft about 40mm from the center of the spur, the 47/23 would give around 37mm. Your 52/17 combo is about 36mm, so the 52/25 would most likely get the job done. Plus you only need to buy the flux center shaft/gear and the 25t pinion from mike, (25-30 bucks for the 2) which is much cheaper than another lipo or motor... Calc info for the 52/25 gearing with flux tranny ratio: Differential Ratio: 3.3076923076923075 Transmission Ratio: 2.215277777777778 Other Ratio: 1 Spur Tooth Count: 52 Pinion Tooth Count: 25 Total Voltage: 22.2 Motor KV: 1600 Tire Diameter (inches): 5.75 Tire Ballooning (inches): 0 Motor Current Draw: 0 Motor coil Ω: 0 Spur/Pinion Ratio: 2.08 : 1 Total Ratio: 15.24111 : 1 Tire Circumference (inches): 18.06 inches (458.83 mm) Total Motor Speed: 35520 RPM Vehicle Speed: 39.87 mph (64.04 km/h) Effective KV Value: 1600 If you have room you can run the smaller 49-47t spurs to up the speed a bit... I went thru all of this with my flm chassis savage... Hope the info helps! And keep in mind with the flux internals on the tranny you can use motor brakes and motor reverse, instead of mech brakes. |
linc, you rule:yipi:
I will give this a try and order some extra parts and see what I come up with. Thanks for the help. Didn't think about the extra size on the pinions:oops: Just mean another 2 weeks before this thing is running. |
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Ya I am just too stubborn for that. After all the time and cash into this thing there is no way it is going to sit there.:intello:
Besides, its driving the wife nuts that it is not done yet. She will probably driving it anyway. She is scared of my Baja. |
Well got everything mounted up. Made some risers for the ESC plate to lift the controller up a bit higher. Have the Lipo, motor and ESC all installed and everything fits very good now. Just waiting on the tranny gear and the larger pinions as well as a new rx and I am ready to go.
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Well got it all running and all I can say is this thing is NUTS!!!!! At least for as long as the rear pinion lasted. Blew it completely apart. Ring gear got a bit chewed as well. Now I just have to figure out different ring and pinions. May go with FLM bulks as well. Gonna be fun when I get this thing running consistently.
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Well got the diff fixed and was able to get a full pack on the truck. Changed to a new pack and started running and that's when everything went wrong. Heard a load snapping noise and shut it down right away. Damage was a chewed steel spur, chewed RCM pinion. So I thought no big deal, just change them out. Went to pull off the pinion and the motor shaft came with it.
Snapped the shaft right off. Also the end bell (?) came off as well. Only good thing is the diffs are fine. Guess it is going to be a while before this is running again until I get the Medusa either repaired or refunded. |
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That sucks. It's happened to me before, but only with a castle CMS36 motor.
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That is a real bummer. hope i have better luck with my conversion.
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Ya, hoping next go around will be better. New to all of this so hopefully I will figure this out sooner or later.
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