Newsgroups: rec.aviation.misc From: Ron Wanttaja
Date: Wed, 21 Jul 2010 07:40:02 -0700 Local: Thurs, Jul 22 2010 2:40 am Subject: Re: Can you ID this? Attitude Indicator / Artificial Horizon ClarkMills wrote: > Do you know which model of aircraft this came from? > http://remote.kiwi.gen.nz/ArtificalHorizon I've got one that's almost identical, except mine has the airplane symbol: http://www.wanttaja.com/ai.jpg These are "ball" type AIs, my presumption is that they date from the 50's or 60's rather than WWII. Your missing metal skin probably held the data plate. My dataplate is says: INDICATOR - ATTITUDE REMOTE Type MM-1 Spec MIL-I-25022 MFRS Model No 978K MFRS Part No 100990-01 Series B-1 MFRS Serial No AF53-2735 The manufacturer is listed as "Lear, Incorporated." However, as the AI was built to a Military Standard, the similar appearance of yours doesn't mean it was also built by Lear. My guess is that the Serial Number starting with 'AF53' means that it was made for the Air Force with a contract date of 1953. There's a separate tag for what I presume is an overhaul record. Company name "Universal Dynamic Scientific & Engineering Consulting Inc.", and says, "This Item Warranted for 3 Months" with the "3" hand-written in ink. The "Date of Overhaul" is very hard to read, but the center two digits are "96" and the last one might be a 1 or a 7. So I'm guessing it was overhauled in 1961 or 1967. Ron Wanttaja
If you want more pictures, even out of curiosity, of anything
(the wiper contacts for example) I'll do them for you.
If you can enlighten me about it's history that would be great.
Otherwise, enjoy the view. :)
Dimensions: 5.25" wide, 5" high, ~9" deep.
Comments: Notice that the sky is "grey" not blue. This is not fading,
it's like that. Note also that the ground is black.
There is no "plane" wire symbol on the glass.
Wed Jul 21 18:46:32 NZST 2010