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peter scott
Joined: 18 Dec 2007
Posts: 7213
Location: Edinburgh
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 Posted: Mon Jan 26, 2015 7:34 pm Post subject: Speedometer for Attack and Retreat! |
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1939 SS Jaguar 2 1/2 litre saloon |
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Ellis
Joined: 07 Mar 2011
Posts: 1386
Location: Betws y Coed, North Wales
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| Posted: Mon Jan 26, 2015 8:38 pm Post subject: |
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What was that from Peter?
An Austin Champ could travel as fast in reverse as it could forward but not at 130 mph!
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mikeC
Joined: 31 Jul 2009
Posts: 1809
Location: Market Warsop, Nottinghamshire
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| Posted: Mon Jan 26, 2015 8:47 pm Post subject: |
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| That's feet per minute (x ten), so only 15mph! |
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Ellis
Joined: 07 Mar 2011
Posts: 1386
Location: Betws y Coed, North Wales
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| Posted: Mon Jan 26, 2015 8:55 pm Post subject: |
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15.9090909126 mph to be precise 
First World War tank?
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mikeC
Joined: 31 Jul 2009
Posts: 1809
Location: Market Warsop, Nottinghamshire
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| Posted: Mon Jan 26, 2015 9:07 pm Post subject: |
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It's an Air Ministry instrument, so presumably some kind of tug for moving aircraft on the ground?
edit: although why would that require a trip reading? |
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peter scott
Joined: 18 Dec 2007
Posts: 7213
Location: Edinburgh
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goneps
Joined: 18 Jun 2013
Posts: 601
Location: Auckland, New Zealand
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| Posted: Mon Jan 26, 2015 11:23 pm Post subject: |
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| mikeC wrote: | It's an Air Ministry instrument, so presumably some kind of tug for moving aircraft on the ground?
edit: although why would that require a trip reading? |
Might be a Hobbs (hours) meter rather than a mileometer. I wondered about a glider winch, but 15mph would be too slow for that. |
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peter scott
Joined: 18 Dec 2007
Posts: 7213
Location: Edinburgh
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| Posted: Mon Jan 26, 2015 11:40 pm Post subject: |
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Don't know about the trips but perhaps similar to this? Helicopters perhaps?
Peter
Or, perhaps something like this?
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1939 SS Jaguar 2 1/2 litre saloon
Last edited by peter scott on Tue Jan 27, 2015 12:07 am; edited 1 time in total |
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goneps
Joined: 18 Jun 2013
Posts: 601
Location: Auckland, New Zealand
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| Posted: Mon Jan 26, 2015 11:49 pm Post subject: |
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Peter,
Helicopters would have the standard type of VSI as shown in your second picture. Apart from having very limited maxima, the first instrument would be far too busy to scan while flying, particularly when flying on instruments alone.
Richard |
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peter scott
Joined: 18 Dec 2007
Posts: 7213
Location: Edinburgh
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| Posted: Tue Jan 27, 2015 12:11 am Post subject: |
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| mikeC wrote: | It's an Air Ministry instrument, so presumably some kind of tug for moving aircraft on the ground?
edit: although why would that require a trip reading? |
Yes, I'm coming round to Mike's suggestion.
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Peter_L
Joined: 10 Apr 2008
Posts: 2680
Location: New Brunswick. Canada.
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traction39
Joined: 19 May 2009
Posts: 399
Location: South Wales
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| Posted: Tue Jan 27, 2015 12:55 am Post subject: |
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Description updated...says it is a barrage balloon winch gauge.
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Alistair
Citroen Light 15 1953, "12" 1939,
Riley 9 Special 1932 |
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Rick
Site Admin
Joined: 27 Apr 2005
Posts: 22782
Location: UK
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JohnDale
Joined: 19 Mar 2008
Posts: 790
Location: Kelvin Valley,Scotland
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| Posted: Tue Jan 27, 2015 11:12 am Post subject: |
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The Pyrene MkVl airfield fire engine with Wilson box could travel as fast in reverse as forward due to a change direction transfer box. Tugmaster aircraft tugs only had a Wilson box with standard reverse - both with Rolls Royce power. The MkVl also fell over if swerved to miss a camel on the runway & the surge in the water tank took over. Pedalling up the tug in a morning to adjust the gearbox bands took 100 presses of the gear change pedal - that's why tug drivers had big calves(at least in one leg) Cheers,JD.
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