There is a list of R1155 publications here Kev: http://www.royalsignals.org.uk/raf.html
I think you may have to register with them. I saw the AP once in the early 70s when servicing the equipment for marine craft and there was a fairly good explanation on the differences between the different suffixes and in places, details of which suffix was on which aircraft fleet. Can’t for the life of me remember the detail now of course!

There was one model to stay away from, this had inadvertently been built using plumber’s flux on the soldered joints. It was taken out of air use and retained at Technical Training schools if I recall. I’m certain it wasn’t the suffix ‘A’.

It would appear that you have an original unit. Many were bought by Radio Amateurs as war surplus in the 60s and one of the first preferred modifications was to remove the d/f circuit entirely because amateurs didn’t need d/f. I think you have a comparatively rare box and I’m sure that there will be a cockpit restoration waiting for it somewhere!

I’m not able to offer any guess on the serial number or value. Restored to pristine and working condition do fetch many £ hundreds I seem to recall.

This might be worth looking at: https://www.google.com/search?q=ap+for+R1155&ie=UTF-8&sa=Search&channel=fe&client=browser-ubuntu&hl=en

Mid-upper turret?

http://cgi.ebay.co.uk/Lancaster-Turret-Lincoln-Shacklton-B17-/320669102808?pt=UK_CPV_Aviation_SM&hash=item4aa95e32d8

Scott, I would hate to send you down a blind alley in your search, but the only 112V DC electrical system that I know of was in the Valiant – also equipped with Avons. Perhaps there was a scheme to use them on Canberras in place of the cartridge starters but getting several batteries together to raise 112V is no mean feat and maybe the idea didn’t progress further because of this. See: http://en.wikipedia.org/wiki/Vickers_Valiant What you can do with this information to lead you to the electric starters info I have no idea, but good luck anyway.

“The pressure on the handle is akin to trying to jack up a very heavy car”.

Ha! Just wait until they all look to you to close the doors again. OK for the first few pumps but when the weight of the 2 doors gradually comes on……. when you get to your desk you’ll definitely look like this > 😮
Where did the fancy yellow steps come from?
Rgds, Aerial

Just a passing thought…..

Everyone up to now seems to be looking to other members of the Avro piston aircraft family, but is it worth having a look at Vulcan airframes? They started life toward the end of the in-service period of the piston types and may share components that were in common use at that time.

I’m of an era long after Lancaster went out of service but if the AP system worked in the same way as that post-war, then I would be looking for the answer in the Vol 6. If I recall from many years ago, the Vol 1 was leading particulars (and generalisations – my words), Vol 2 was Mods, Vol 3 was the Spares Schedule (list of bits – my words), Vol 4 – not sure, think it was something to do with test schedules or was it Routine Maintenance schedules (?), Vol 5 was handling notes, safety warnings and so on. Vol 6 (I’m fairly sure) was the Repair Manual.
As I say, it’s been a long time that I have seen the Vol 1 to 6 system and the memories are a little clouded these days.
Perhaps someone with the real breakdown of APs would be kind enough to come on and confirm or clarify my uncertainties. Has anyone got sight of a full suite of Shackleton APs to use as an example?
Regards, Aerial

“I find it rather amusing no one has suggested checking the groups own website” Well I for one, didn’t know of it’s existence! (But I do now and it is in my favo(u)rites!!
Regards, Aerial