The Instrument you can live without

The AI. In reading the FAA Instrument Flying Handbook, it says you can
derive all of the necessary flight information from the other 5 instruments.

Chris G.

Chris W wrote:
Brad Zeigler wrote:

Hobbs meter.


I guess I need to be more specific. If, before an IFR flight, you had
to remove one of the instruments in the image linked below, which one
would it be?

http://www.thewishzone.com/aviation/...nstruments.jpg

Other than a compass, and navaid radios you have no other device to
prevent you from impacting the ground unexpectedly. To be even more
clear, you don't have a GPS!

Chris G. wrote:

The AI. In reading the FAA Instrument Flying Handbook, it says you can
derive all of the necessary flight information from the other 5
instruments.

But you can get all of the info provided by the TC or the DG from a single
instrument, and you can get all the info provided by the VSI from two.

George Patterson
Drink is the curse of the land. It makes you quarrel with your neighbor.
It makes you shoot at your landlord. And it makes you miss him.

Chris G. wrote:

The AI. In reading the FAA Instrument Flying Handbook, it says you can
derive all of the necessary flight information from the other 5
instruments.

I agree, but the loss of any one of them is not that difficult to deal
with. The real problems start when you lose more than one. And if you
lose the AI, you're probably going to lose the DG too.

Now if you have a GPS, all you need is the the TC. The GPS lags too
much to tell be useful for roll information, but it can be sufficient to
give you everything else. In a pinch. I certainly wouldn't choose to
fly IMC that way, but it might be fun to try under the hood...


-m
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