markbitterlich(at)embarqm
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 Posted: Fri May 01, 2020 7:13 am Post subject: Magnetic heading sensor (ZH-4)Re: Magnetic heading sensor ( |
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Actually, the ADI was not the bad actor Rich, and EFIS was not necessary really but at the time Pax thought so. The sticking attitude and off flags were actually being caused by the Course Attitude Data Transmitter, or CADT. A synchro rack, and it would "stick". The A-6E's never had the problem and this was eventually resolved by replacing the Prowler CADT with the Intruder's DSDC, or Digital Signal Data Converter. I was up at Calverton working with flight test on this exact issue. The ASN-130 CAINS really was not the bad actor on the "OFF FLAG" issue although everyone assumed it was. Of course the ASN-172 solved that once and for all. The ASN-50 gyro was reliable. Nothing else in that system was. š Alpologies to the Yak List for boring info.
Mark
Mark
-------- Original message --------
From: Richard Romaine <romaine_richard(at)yahoo.com>
Date: 5/1/20 06:23 (GMT-05:00)
To: yak-list(at)matronics.com
Subject: Re: Yak-List: Re: Magnetic heading sensor (ZH-4)Re: Magnetic heading sensor (ZH-4)Re: Magnetic heading sensor (ZH-4)Magnetic heading sensor (ZH-4)
--> Yak-List message posted by: Richard Romaine <romaine_richard(at)yahoo.com>
I respect Markās point of view after his years of maintaining Grumman systems!
For anyone else contemplating pulling good systems to put in āglassā, please carefully put your old stuff on the shelf, I may need it someday. I still check to see the small circles go by on the attitude gyro every flight.
//
EA-6B ICAP II ASN(?)-130 INS was advertised to us as an improvement over -50 (not INS) but we flew off the boat using -50 for attitude source because -130 wouldnāt always throw an āoff flagā when it dropped offline, not good off night cat. On Forrestal class Cat 3 was shortest/hardest shot and often dumped -130 INS capability, so we asked Boss to avoid sending us to Cat 3...guess which one we got after that? (and stop calling me Francis). ADI ball was a work of art (but I didnāt have to maintain it/or its sources). Never did like the EFIS they replaced it with to get civilian ILS...at +/-90 the 2D display would flip flop to reorient with heading...adding another layer of confusion when (per NATOPS) you were relying on that for post stall recovery.
Guess thatās part of why I donāt like all the needless color on current generation of glass displays...rather have monochrome for a parameter unless thereās something wrong, then turn it red. Most of them look like someone puked crayola all over the display even during normal ops...
...and if pain in the tail was the only criteria, I would have been booted from the house years ago!
Cheers, Rich
Sent from my iPhone
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