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By: 18th February 2020 at 08:16 Permalink
-Sorry, photos didn't attach...
By: 19th February 2020 at 07:55 Permalink
-Welcome Oracal.
Is there a Blake's 7 reference in your moniker?
Thanks for the useful information; so I will investigate the Meteor. I have had a bit of a look on line and can see how the gearbox is attached to the auxiliary spar that runs in front of the engine, and I can see how the Heywood compressor pokes up. I also saw an extract from a manual for sale that seems to show the four studs sticking out of the aux spar. Will check Meteor/manuals to see if that is indeed where the two come from.
I have uploaded the SG.3/1 manual here: http://vhjet.com/home/publications/ - it is down the bottom under the Mk.30/31 heading.
I had taken the statement in the extract attached that ties Special Gearbox and SG as a definition for the abbreviation.
Cheers.
By: 19th February 2020 at 21:42 Permalink
-Thanks Oracal.
By: 21st February 2020 at 22:53 Permalink
-Hi Oracal.
Are you able to tell me the full titles of these pubs?
A.P.2240A, Vol. 2, Part 2
A.P.2240A, Vol. 6, Part 2, Rotol Auxiliary Gearbox and Drive
These entries come from the AAP for the Vampire Mk.30/31. Maybe the second one is Descriptive & Servicing for SG.3/1?
Cheers.
By: 21st February 2020 at 23:04 Permalink
-FYI, here are some gearbox IDs from my Nene notes (Nene 3 to 7 entries from a RR TSD):
Nene 3 - SG.2/1
Nene 4 - TG.4/1
Nene 5 - PCG.3
Nene 6 - PCG.3
Nene 7 - SG.2/1
Nene 2-VH - SG.3/1, N37L/2512
By: 21st March 2020 at 22:40 Permalink - Edited 21st March 2020 at 22:43
-Turns out one of the gearboxes does have a data plate. So this one is an SG.1/18. I have looked at two manuals, so it could be Meteor T.7 or F.8, for the starboard location. The other is missing its data plate. The main casing casting has the same part-number, and generally the arrangement is the same. However, the lubrication lines are different, there being an extra spur on one and a couple of other differences. I suspect this is a difference of mod status as one of the features on the unit missing the data plate appears in the parts book illustration for the /18, but does not appear on the unit with the data plate. Anyway, not planning on digging through mods right now to figure this out.
Posts: 282
By: Nicko - 18th February 2020 at 08:13
Does anybody know what aircraft this gearbox is from? Refer to attached photos.
I'm not sure what the part number is or if there is an AM ref number.
The gearbox is very similar to the SG.3/1 that was fitted to the Australian single-seat Vampires. These were fitted with the Rolls Royce Nene. I have attached a schedule of spares marked-up image to show this gearbox. SG stood for Special Gearbox. Thanks to Alan Allen, I do have the manual for the SG.3/1.
There are two of the 'mystery' gearboxes shown; one has a Dowty Mk.28 hydraulic pump fitted.
I'm guessing that the gearbox was bolted to the firewall like with the Mk.30 and Mk.31 Vampires.
The visible drive shaft from the engine then points forward or aft. I guess there are other possibilities.
Presumably it is from a UK design aircraft. It is a type that would have served in Australia. Is it necessarily military? Is it necessarily a jet as the Vampire is? I've been told it is not from the Firefly or Sea Fury.
Gannett? Canberra? Viscount?