Ed Batchelor Posted December 7, 2009 Share Posted December 7, 2009 Came accross this recently, I am only guessing that it came out of an airoplane since it has 2 inputs and not many vehicles are twin engined (OK except tanks and no doubt a few other odities) Anyhow, does anyone recognise it, there should be two signal generators, the indicator unit has another input and a second needle (not visible as it is shorter than it should be). The generator has the following on the body: Generator Mk 11A for engine speed indicator Mk11 ref no 6A/400 serial no 7677 / 40 Indicator has "engine speed" "hundreds rpm" on the front. Also has "The record electrical co ltd" "broadheath, manchester" "ref 6A/442" "serial no 616 / 35" Saved it from inevitable scrapping, not sure why it just looked interesting I guess. No idea if it is military, wont be out of a spitfire....maybe a mosquito! Anyhow maybe someone can shed some light on it? Regards, Ed Quote Link to comment Share on other sites More sharing options...
Jessie The Jeep Posted December 7, 2009 Share Posted December 7, 2009 It could also be off a twin engined boat. Quote Link to comment Share on other sites More sharing options...
Ed Batchelor Posted December 7, 2009 Author Share Posted December 7, 2009 Yes could be nautical I suppose, I dont know what engine speed your average plane engine goes up to. The dial only starts at 1800 and goes up to 3000 odd which must rule out diesels of the "era" I should imagine. Lets hope someone recognises it! Quote Link to comment Share on other sites More sharing options...
Bodge Deep Posted December 7, 2009 Share Posted December 7, 2009 6A prefix serial number is often seen on Air Ministry equipment... aircraft part? Quote Link to comment Share on other sites More sharing options...
woa2 Posted December 7, 2009 Share Posted December 7, 2009 (edited) The reference number 6A/400 is an RAF part number. I suggest it's from a 2 engined aircraft - Wellington, perhaps? Or it could be an RAF boat? Edited December 7, 2009 by woa2 Added a bit Quote Link to comment Share on other sites More sharing options...
Jessie The Jeep Posted December 7, 2009 Share Posted December 7, 2009 It's the RPM range that is odd. Just a quick look at a B-17 RPM clock shows the range from 0-4500 with the red line being about 2600rpm. The range shown in the photo starts at 16, presumably 1600rpm. What ever it is has a high idle rpm, or lower end speed is not important. Could it be off a generator of some kind, that runs at normal operating rpm or nothing? Quote Link to comment Share on other sites More sharing options...
Ed Batchelor Posted December 7, 2009 Author Share Posted December 7, 2009 My thoughts were that it was probably avaiation related, hence the posting. RPM range is 1600 to 3200. I have no knowledge of plane engines so not sure what the usual "working" rev range would be. Good to hear a few people having some useful input. Quote Link to comment Share on other sites More sharing options...
Jessie The Jeep Posted December 7, 2009 Share Posted December 7, 2009 (edited) Hampden, Wellington and Anson Rev Counter. See near the bottom of this page. http://spitfirespares.com/SpitfireSpares.com/Pages/instruments7.html Edited December 7, 2009 by Jessie The Jeep Quote Link to comment Share on other sites More sharing options...
honeileen Posted December 7, 2009 Share Posted December 7, 2009 All we need now is the data plate so we can get a Hampden on the airshow scene:cool2::-D:-D Christian Quote Link to comment Share on other sites More sharing options...
Bodge Deep Posted December 7, 2009 Share Posted December 7, 2009 Jesse wins a coconut! Quote Link to comment Share on other sites More sharing options...
Ed Batchelor Posted December 7, 2009 Author Share Posted December 7, 2009 Well done that man!! Now anyone got a wellington in their garage....minus a tacho!! Would be good to find a home for it, any suggestions? Are any of these war birds still left? Quote Link to comment Share on other sites More sharing options...
Jessie The Jeep Posted December 7, 2009 Share Posted December 7, 2009 Only two left intact. One at RAF Hendon, the other at Brooklands. Quote Link to comment Share on other sites More sharing options...
Jessie The Jeep Posted December 7, 2009 Share Posted December 7, 2009 Here's the Hendon example, and here's the tail section of one at the Wellington Aviation Museum, Morton in Marsh. Quote Link to comment Share on other sites More sharing options...
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