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#21
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backup for vacuum pump/attitude indicator failure
I have the precise flight setup. I've never had to use it but, my sense
is that the vacuum failure light may be the most valusable component. Blanche wrote: Concerning the scan to recognize a failure...In addition to the backup, Precise Flight also offers a lamp that is triggered by vacuum pump failure. An immediate warning rather than waiting to discover it. True, it doesn't offer any redundancy, but minimizes the time to identify a problem. Of course I recognized my AI failure immediately -- I was turning right and the AI turned left.... |
#22
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backup for vacuum pump/attitude indicator failure
Maule Driver wrote:
I have the precise flight setup. I've never had to use it but, my sense is that the vacuum failure light may be the most valusable component. The light is good if you don't have one. ---- Directed to the OP (I'm sure MD knows this): If you go with the Precise Flight, be sure you check the shuttle valve frequently as described for preflight in the POH Supplement. The shuttle valve can stick and then when you need it, it doesn't work. Just the act of checking it causes the valve to operate and probably helps keep it from sticking. Also be sure you understand the operating limitations - altitudes and power settings where it works and doesn't. |
#23
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backup for vacuum pump/attitude indicator failure
On Sun, 19 Nov 2006 16:45:31 -0600, Jim Macklin wrote:
yes See the current "Tech Topics" article in CPA Magazine. It's not quite as clear-cut an answer as this. - Andrew |
#24
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backup for vacuum pump/attitude indicator failure
On Mon, 20 Nov 2006 13:43:01 -0500, Dave Butler wrote:
Also be sure you understand the operating limitations - altitudes and power settings where it works and doesn't. I have to say: I don't like this system. One time when you want happy gyros is when low and busy...like on a missed approach. But the full-throttle of the missed means that the gyros are spinning down. Plus, of course, there's the fact that it does nothing for an AI or plumbing failure. - Andrew |
#25
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backup for vacuum pump/attitude indicator failure
On Mon, 20 Nov 2006 10:49:16 -0600, dlevy wrote:
I finally said screw it..... I ordered the electric backup attitude indicator from Sporty's. $1,871.45 with the AOPA discount. All of the other options are not really usable. This way I have two indicators inches apart that require no switching, batteries, cables, etc.... I'm leaning towards one of the portable GPS units that come with the ability to use an electronic "gyro" (no parts actually spinning). They tend to be more expensive than the Sporty's AI, but not by that much. And they tend to have some fun additional features (ie. weather, HITS, and even traffic). But what I most like about this solution is that it's not just an AI/vacuum backup. It is also backing up electrical power and GPS. - Andrew |
#26
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backup for vacuum pump/attitude indicator failure
I have a lowrance 100 and a palm with hanger18 software for backup attitude.
It's a cable nightmare and the palm has to have fresh batteries. It's not real reliable either. Imho, nothing beats the Sporty's option. "Andrew Gideon" wrote in message news On Mon, 20 Nov 2006 10:49:16 -0600, dlevy wrote: I finally said screw it..... I ordered the electric backup attitude indicator from Sporty's. $1,871.45 with the AOPA discount. All of the other options are not really usable. This way I have two indicators inches apart that require no switching, batteries, cables, etc.... I'm leaning towards one of the portable GPS units that come with the ability to use an electronic "gyro" (no parts actually spinning). They tend to be more expensive than the Sporty's AI, but not by that much. And they tend to have some fun additional features (ie. weather, HITS, and even traffic). But what I most like about this solution is that it's not just an AI/vacuum backup. It is also backing up electrical power and GPS. - Andrew |
#27
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backup for vacuum pump/attitude indicator failure
Blanche wrote: Concerning the scan to recognize a failure...In addition to the backup, Precise Flight also offers a lamp that is triggered by vacuum pump failure. An immediate warning rather than waiting to discover it. True, it doesn't offer any redundancy, but minimizes the time to identify a problem. Of course I recognized my AI failure immediately -- I was turning right and the AI turned left.... The concern about noticing a failed pump quickly is one of the reasons I got the voice annunciator system. That and the gear warning horn is hard to distinguish from the stall horn. I now have something like 8 channels hooked up and I like it. -Robert |
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