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Artificial Horizon Replacement

 
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mt



Joined: 21 Mar 2008
Posts: 19

PostPosted: Sat Jan 02, 2010 10:12 pm    Post subject: Artificial Horizon Replacement Reply with quote

What I think is the original ADI type just failed in our F-35 (wont find level at start). Is is better to replace the original or have it overhauled? Suggestions on what to replace it with or where to overhaul? Are non-autopilot ADI's universal or are there differences?

Thanks
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bgwells
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Joined: 01 Sep 2005
Posts: 23

PostPosted: Sun Jan 03, 2010 3:15 am    Post subject: RE: Artificial Horizon Replacement Reply with quote

If you have the original style AH, then it's larger than the more modern day AH. It is vacuum driven and so as long as what you are replacing it with, is the same hole size and vacuum, then no worries. I don't think you will find any autopilot connections with this unit. Do you have a auto pilot in your F35?

As far as overhaul, you would just have to contact a list of instrument shops and let them tell you what the cost is to overhaul or replace. The older instruments are hard to get parts for so many shops just will not work on anything this old, due to lack of parts source for what ever it needs. The good side is there were lots of them made and plenty of old ones still around and on the shelf. I would guess that you could post ad on Barnstormers or Beech swap page and get a replacement. Have you already removed yours?

New style will be smaller and will have to have an adapter to fit the original large Beech cut out hole.

I think the least costly way to go is to find a serviceable unit and replace.

Good Luck.

Bryan
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VinceGlorioso



Joined: 25 Feb 2008
Posts: 16
Location: Fort Myers, Fla.

PostPosted: Mon Jan 18, 2010 4:35 pm    Post subject: What I would have bought Reply with quote

If you fly your Bonanza IFR, I would suggest a new SigmaTek 5000B-60 (unlighted) or 5000B-62 (lighted) if you do not already have a low vacuum annunicator, as this instrument also has a ball (inclinonmeter) that will be in front of your eyes, instead of to the side.
Vince Glorioso C35
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VinceGlorioso



Joined: 25 Feb 2008
Posts: 16
Location: Fort Myers, Fla.

PostPosted: Tue Jan 19, 2010 3:26 pm    Post subject: Oops ... Reply with quote

I remember now why we did not buy the AI with the low vacuum warning flag: If you have the original 4" vacuum system with the wet pump, the flag will show because that is not enough vacuum to pull the flag out of view. Just buy a new lighted or unlighted AI with the ball, and consider getting a low vacuum indicator that is adjustable to the slightly lower vacuum system in the vintage Bonanza's.

It is dangerous to have a vacuum pump fail and have you not notice it, or enter a spin because you didn't have the ball centered in a stall.

Just my opinion, of course.
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