Good morning all
I’m trying to identify the Pt No of a pneumatic valve that is buried within the Stirling throttle box and is used to actuate the landing lamp. All I have is the extract from the AP below which implies that it is a rectangular block with ports leading to the up/down lines and with 2 plungers which are depressed in turn by a lever connected to the landing lamp lever. It’s been suggested by Air Ministry that this is probably a Dunlop item but that’s about it. The block itself is approx 4″ x 2″ but IO’m unable to ascertain the depth but judging by the size of the ports its probably about 1″ deep.
If anyone out there can identify it or better still point me in the direction of one it would be greatly appreciated
regards
John
By: 12jaguar - 22nd August 2013 at 19:17
Hi Cees
Not quite, it’s fed by a tap off from the twin air bottles under the second pilots seat (as is the Brake relay valve) but otherwise is an independent system.
John
By: CeBro - 22nd August 2013 at 17:10
John,
Is that the same system as the valve connected to the rudderpedals for steering?
Cees
By: 12jaguar - 22nd August 2013 at 14:36
Thanks OEB
We’ve got the mod leaflets but nothing refers to the valve unfortunately. The next step will be to go to RAFM and see if we can get what passes for the Vol 3 copied although this is a large collection of sheets with no illustrations unfortunately. Does anyone know if Dunlop have a historical archive that may be able to assist or if there’s an AP that deals with pneumatic systems of that era?
John
By: Arabella-Cox - 22nd August 2013 at 13:28
John,
Can’t help I’m afraid on you’re specific valve but I had a similar issue with a valve for the Horsa.
I suspected mine was a Dunlop part – or made up from them – but drew a complete blank. The only thing I can think of is if you have any mod engineering sheets that make reference to the valve. In the case of the Horsa it listed the part with an AM Ref. of 26ED/XXXX 6YYYYYYY (can’t remember the exact part numbers) which indicated that it was Horsa specific and the Airspeed drawing number for it – so not a stock item.
Might be worth looking down that avenue.
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August 22, 2013 at 10:24 am