Key.Aero Network
Register Free

Results 1 to 3 of 3

Thread: Louis Newmark / Lear Siegler / Smiths: Attitude & Heading Reference Systems (AHRS)...

  1. #1
    Join Date
    Jan 2012
    Location
    MUC/Germany
    Posts
    7

    Louis Newmark / Lear Siegler / Smiths: Attitude & Heading Reference Systems (AHRS)...

    Hi there,

    surely there are tech experts in this forum who encountered the AHRS I am
    interested in - short story: Has any one got information/hints or literature on
    the AHRS of the Hawk aircraft which must have been in use until the early
    2000s?

    Any hints would be highly appreciated,

    Erik.

    -----------------------------------------------------------------------

    Longer version of the story: Some time ago I obtained a test set labeled Smiths Industries
    (dated 1987 and last caled until 2001, RefNo 6C/6641376):

    Click image for larger version. 

Name:	testset-1.jpg 
Views:	3 
Size:	782.7 KB 
ID:	261773 Click image for larger version. 

Name:	testset-2.jpg 
Views:	8 
Size:	482.8 KB 
ID:	261774

    After a first posting in pprune it is clear now, that the test set was used on a
    reference system (probably Hawk) that was initially developed by Lear Siegler and later made by
    Louis Newmark who have even later been bought by Smiths. The test set probably was in use until
    the early 2000s - I think it is from the Hawk since the AHRS panel from this looks very similar
    to a section of the test set:

    Click image for larger version. 

Name:	panel-hawk.gif 
Views:	1 
Size:	102.6 KB 
ID:	261775

    Click image for larger version. 

Name:	panel-testset.gif 
Views:	0 
Size:	115.4 KB 
ID:	261776

    Looking at the cables that came with the test set I guess the set was plugged between the
    LRUs and the cockpit instruments to test either of them. As vintage avionics of the 1970thies
    is my hobby I'd be very happy to get hands on a complete system and thus part nos would be
    very helpful (fantastic would of couse also be the air publication related to this system)!

    Click image for larger version. 

Name:	testset-stickers1.jpg 
Views:	1 
Size:	74.2 KB 
ID:	261781Click image for larger version. 

Name:	testset-stickers2.jpg 
Views:	0 
Size:	55.3 KB 
ID:	261782Click image for larger version. 

Name:	testset-stickers3.jpg 
Views:	0 
Size:	71.1 KB 
ID:	261783

    Currently there are components of a simpler (perhaps earlier) system from the Buccaneer on
    eBay - this seems to be a compass only system (i.e. no attitude reference): Display, Panel and a
    HSI from the Hawk (?)
    as well.

    If interested in my other avionics activites, look at my YouTube movie regarding the
    Tornado's INS and the Tornado-PEC-Page on research on an archaic, early digital
    computer...

    Thanks, Erik.

  2. #2
    Join Date
    Jan 2012
    Location
    MUC/Germany
    Posts
    7
    Just in case, the links to the eBay-Auctions in my original posting are going defunc in the
    future, here some data of the parts I guess being not from the AHRS6000 but from the
    "compass only", earlier system used on the Buccaneer:

    Gyro, Louis Newmark, NDN8739-01 with Gyro-Assy; System CN13-04; Part.No. NDN8715-01
    Panel "Gyro Comp", Part.No. 1055, Ref.No. 6B/3098; Compass G.M. Mk6 (Under license from Lear Siegler)

    Click image for larger version. 

Name:	GYRO0.jpg 
Views:	0 
Size:	20.7 KB 
ID:	261922 Click image for larger version. 

Name:	PANEL0.jpg 
Views:	0 
Size:	31.4 KB 
ID:	261923

    These two instruments I guess may be the right instruments for/from the AHRS6000 as
    used on the Hawk - but not sure (?):

    Attitude Indicator; Part.No. 6714-03; Ref.No 6A/6370014, Louis Newmark under license from Lear Siegler
    Horizontal Situation Indicator; WL/307RNA/MS/2, Smiths Industries

    Click image for larger version. 

Name:	ADI0.jpg 
Views:	0 
Size:	38.6 KB 
ID:	261920 Click image for larger version. 

Name:	HSI0.jpg 
Views:	2 
Size:	47.6 KB 
ID:	261921

  3. #3
    Join Date
    Jan 2009
    Location
    North Wales
    Posts
    340
    I put a reference to this in "Historic" not because it is particularly old but there are a lot of knowledgeable people frequenting that forum.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

 

- Part of the    Network -

KEY AERO AVIATION NEWS

MAGAZINES

AVIATION FORUM

SHOP

 

WEBSITES