r1_pete
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| posted on 7/5/09 at 10:18 AM |
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BEC Reverse...
Not wanting to hijack the ebay link thread....
I'm seriously thinking of a BEC project when the MGB's done, and reverse was a consideration, how do these reverse box's work? ebay
item 230341393590, a westfield reverse box.
It looks like it mounts on the chassis and drive is permanently through it, can reverse be engaged in any gear? or in theory go through the gearbox in
reverse - scary.
Take it it means a second gear lever.
If they are permanently spinning, whats the life span like.
I'm thinking along the lines of a Morgan three wheeler replica with a Moto Guzzi V twin.
Are there any better alternatives etc...
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richardh
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| posted on 7/5/09 at 10:34 AM |
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quaife do one and its pricey (i have one) they are clunky though
MNR have a new design one
there was another stand at stoneleigh (cant recall name but they do diffs and boxes etc)
Electric reverse units
might be more but those are ones i know of
Time for a change!
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Gergely
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| posted on 7/5/09 at 10:36 AM |
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I also like the look of the 3 wheelers, particularly the Pembletons.
On the below site there is a writing on a Moto Guzzi upgrade where the owner mated the engine to the 2CV gearbox, so reverse is not an issue. This
could well be something of interest to you...
Pembleton owners link
Gergely
Our build pictures
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jimgiblett
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| posted on 7/5/09 at 10:39 AM |
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Elite were at the show with a geared reverse box.
I was very impressed with the new MNR reverse box. Still a "prototype"?
I stand to be corrected but I think it differs friom the other geared reverse boxes in that in forward mode it is a direct coupling and only in
reverse does drive go via a meshed gear arrangement. Thus less losses, less noise and less wear.
It is on my Xmas list.
- Jim
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MikeRJ
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| posted on 7/5/09 at 10:39 AM |
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quote:
Originally posted by r1_pete
It looks like it mounts on the chassis and drive is permanently through it, can reverse be engaged in any gear?
Correct, you can go as fast backwards as you can forwards.
quote:
Originally posted by r1_pete
Take it it means a second gear lever.
Yes.
quote:
Originally posted by r1_pete
If they are permanently spinning, whats the life span like.
Not the most reliable bit of kit Westfield have made for sure, and of course they absorb some power as well.
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hobbsy
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| posted on 7/5/09 at 11:15 AM |
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quote:
Originally posted by jimgiblett
I was very impressed with the new MNR reverse box. Still a "prototype"?
I stand to be corrected but I think it differs friom the other geared reverse boxes in that in forward mode it is a direct coupling and only in
reverse does drive go via a meshed gear arrangement. Thus less losses, less noise and less wear.
Hmm sounds very interesting, not heard of this one before.
Is it of similar dimensions and weight to the quaife / westfield / elite reverse boxes I've seen?
Cost?
Shame I've just had a new prop made but could always get it altered to suit.
I like the idea of no losses.
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richardh
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| posted on 7/5/09 at 11:21 AM |
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its the same as the quaife, same prop connection and same mounting holes
Time for a change!
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Hellfire
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| posted on 7/5/09 at 11:22 AM |
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MNR Reverse Box
Phil
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hobbsy
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| posted on 7/5/09 at 11:42 AM |
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I did do a search for "MNR reverse" or similar and got no hits!!!
But thanks for the link, I'll have a read!
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motorcycle_mayhem
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| posted on 7/5/09 at 12:06 PM |
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My experience is that the Westfield Tunnel Lubrication System (WTLS) doesn't consume very much power, though it does generate a little heat in
use. I ran the WTLS and then the centre bearing set-up (morning/afternoon) on a rolling road. Very little difference (if any). This was, however, with
an engine developing very little power (it's only a GSXR750). It does, however, generate noise and vibration.
My last one snapped it's shaft on a downchange, causing the prop to take a chunk out of my left leg.....
What the WTLS does do though, is make the whole concept of reversing effortless. If you're happy doing a bit of maintenance, it's a damn
good system.
If you're on a track though, my advice isn't to use it.
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adam1985
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| posted on 7/5/09 at 04:10 PM |
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quote:
Originally posted by motorcycle_mayhem
My last one snapped it's shaft on a downchange, causing the prop to take a chunk out of my left leg.....
ouch what happened
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