Ninehigh
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| posted on 2/8/10 at 03:05 PM |
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Reversing thingy
I remember some WW2 Jeep-esque vehicle that could use all the forward gears as reverse ones at the flick of a switch or lever.
Hopefully someone else knows what I'm talking about, if it's a mechanism worth trying in a Bec?
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Peteff
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| posted on 2/8/10 at 03:12 PM |
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That was an Italian invention wasn't it ? 
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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Miks15
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| posted on 2/8/10 at 03:15 PM |
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if you have a reverse box you can do that in a BEC.
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adithorp
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| posted on 2/8/10 at 03:19 PM |
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Think you're talking about an Austin Champ which had a RollsRoyce engine. Post war (just) I think. Lots of national service guys ended up on a
charge for trying to see how fast they could go backwards.
http://en.wikipedia.org/wiki/Austin_Champ
The reverse boxes available from quaife, MNR, etc, act on the output just the same and give all gears in reverse.
adrian
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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Ninehigh
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| posted on 2/8/10 at 03:41 PM |
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quote:
Originally posted by adithorp
Think you're talking about an Austin Champ which had a RollsRoyce engine. Post war (just) I think. Lots of national service guys ended up on a
charge for trying to see how fast they could go backwards.
http://en.wikipedia.org/wiki/Austin_Champ
The reverse boxes available from quaife, MNR, etc, act on the output just the same and give all gears in reverse.
adrian
Yeah that sounds about right. Has anyone actually done it in a Bec or is it not locost enough?
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matt_claydon
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| posted on 2/8/10 at 04:02 PM |
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A 3.14 LSD in Sierra casing with built in reverse would sell like hot cakes.
There was a car (can't remember name) with a 2-stroke engine where you just stopped the engine and restarted it running backwards by turning the
key the opposite way when you wanted to reverse. This could be done on a four-stroke with some clever variable cam trickery.
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scootz
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| posted on 2/8/10 at 04:06 PM |
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quote:
Originally posted by Peteff
That was an Italian invention wasn't it ?
I believe that French engineers also had a hand in the design!
It's Evolution Baby!
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mcerd1
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| posted on 2/8/10 at 04:51 PM |
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I disn't think the quaife reverse boxes are strong enough to handle full speed backwards.....
quote:
Originally posted by matt_claydon
A 3.14 LSD in Sierra casing with built in reverse would sell like hot cakes.
I think there is a diff out there that does that already - but its a very long way from locost 
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MakeEverything
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| posted on 2/8/10 at 05:13 PM |
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quote:
Originally posted by matt_claydon
A 3.14 LSD in Sierra casing with built in reverse would sell like hot cakes.
There was a car (can't remember name) with a 2-stroke engine where you just stopped the engine and restarted it running backwards by turning the
key the opposite way when you wanted to reverse. This could be done on a four-stroke with some clever variable cam trickery.
Really bad for the bearings though.
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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scootz
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| posted on 2/8/10 at 05:19 PM |
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quote:
Originally posted by mcerd1
I disn't think the quaife reverse boxes are strong enough to handle full speed backwards.....
I thought it was a straightforward 1:1 arrangement...
It's Evolution Baby!
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mcerd1
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| posted on 2/8/10 at 05:29 PM |
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quote:
Originally posted by scootz
quote:
Originally posted by mcerd1
I disn't think the quaife reverse boxes are strong enough to handle full speed backwards.....
I thought it was a straightforward 1:1 arrangement...
its definatly strong enough forwards & 1:1
but backwards I'm not sure if its still a 1:1 and rememer seeing something about a max recomended speed / torque or something...
[edit]
found it dax sell them for the rush MC (for ~£900  ) with this little disclaimer:
quote:
The Reverse Gearbox is only suitable for engines up to 250bhp. Reverse gear must
only be used to manoeuvre the vehicle slowly. e.g. Parking.
[Edited on 2/8/2010 by mcerd1]
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g.gilo
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| posted on 2/8/10 at 07:15 PM |
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reversey thing
the device for making 2 strokes run backwards was called a siba dynastart,
it was a starter/dynamo/reverse all in one.
it worked by retarding the ignition to a point where the engine when given a kick backwards by the starter would run quite happily backwards. some old
2 stroke bikes with the ignition timing a bit retarded were known to run backwards when kickstarted, you only found out when letting the clutch out.
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