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Better dea for electric reverse..??


7ishNZ

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I was trying to come up with a better idea than a ring gear and auto style starter motor... how about this...

 

What about using an auto starter motor with a small multi-rib v-belt pulley in place of the stock gear, driving to a similar but larger pulley on the driveshaft, with the belt being tensioned by a slip roller when reverse was required. You could control the motor with a micro switch that energized when the belt was tight, and you could ensure that the belt did not drag on the driveshaft when not in use... That way you would prevent the large shock loadings of a fixed ring gear, it would reduce the current drain of a solenoid( not required) and the high start torque power drain, and you could mount it anywhere you had space.

 

Comments, anyone??

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I was trying to come up with a better idea than a ring gear and auto style starter motor... how about this...

 

What about using an auto starter motor with a small multi-rib v-belt pulley in place of the stock gear, driving to a similar but larger pulley on the driveshaft, with the belt being tensioned by a slip roller when reverse was required. You could control the motor with a micro switch that energized when the belt was tight, and you could ensure that the belt did not drag on the driveshaft when not in use... That way you would prevent the large shock loadings of a fixed ring gear, it would reduce the current drain of a solenoid( not required) and the high start torque power drain, and you could mount it anywhere you had space.

 

Comments, anyone??

 

What's wrong using the quaife reverse box unit?

 

 

I used to have a reverse box for my hayabusa

http://mjmturbos.com/images/reversemount.jpg

Edited by BusaNostra
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Who needs reverse? I pulled mine out last week. Saved 28 lb. Plus I get exercise pushing my car backwards. hahaha

 

http://thekneeslider.com/images/stealthtryke5.jpg

 

I have a quaife reverse box like the picture above, and love it. I have a narrow driveway that I back up into the garge every time. But my car came with it, and if it goes bad, I am out of luck! and will be pushing like Hank.

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I have Quaife reverse also. Holding up so far with 22k miles of 'street' driving. Has leaked since new - Quaife says that's gonna happen unless you install breather tube and recovery tank - I did not. Quaife also says ok to run on less than full level of lube. I put in about 50 ML of lube per year and just drive (usually about 2.5-3k miles/year) - I have an old garage and don't mind the oil drips. I believe the design is dog engagement in 'forward' position, so not much power loss. Reverse is geared and quite 'whiney' when in use. Most annoying feature is the almost 1/4 inch of lash it has that helps the car go into occassional 'death oscillations' under light throttle (no doubt contributed to by the light bike flywheel). Tricky to drive smoothly, but you get used to it. Let a friend try the car for the first time and they will quickly admire your advanced driving skills! But a few eye blurring 11k rpm run-ups through the gears make that all go away.

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  • 2 months later...
http://thekneeslider.com/images/stealthtryke5.jpg

 

I have a quaife reverse box like the picture above, and love it. I have a narrow driveway that I back up into the garge every time. But my car came with it, and if it goes bad, I am out of luck! and will be pushing like Hank.

 

Any more information on the CNC'd carrier the Quaife is mounted in (in the photo)

 

T

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  • 9 months later...

i have been thinking of removing the reverse box for a while now - BUT after touring round scotland we were on a tiny narrow road when a huge 40 ton lorry came the other way - - road blocked.. hmmm i couldnt back up (even tho i had a reverse as there were lots of cars behind me) but the lorry driver kept crawling forward! his rear trailer wheels nearly ran over the top of the right front wheel! woaaaahhhh! reverse quick.. blasting the air horn and reversing as much as i could i saved being squidged...

 

think about it first..

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