shame on garmin??

The key is REDUNDANCY. Lets say computer one has a probability of
breaking of .01 (1 out of 100). Computer B has a probability of
breaking of .01. If their probabilities of breaking are independent of
each other then the probability of BOTH breaking is .0001 (1 in
10,000).

Perhaps each G1000 install should be accompanied by a totally seperate
GPS/Com, much like it has totally seperate AI, airspeed and altimeter.

Robert M. Gary wrote:
Mxsmanic wrote:
Robert M. Gary writes:

I wish more companies had such great service.

Great service is a good thing, but a better thing is equipment that
doesn't need service to begin with. Having great service doesn't help
when your equipment fails in flight.

If you've discovered a way to produce 100% defect free products let me
know. Would you come work for me? I'll pay you $2.5m each year we are
100% defect free.

-Robert

Doug wrote:
The key is REDUNDANCY. Lets say computer one has a probability of
breaking of .01 (1 out of 100). Computer B has a probability of
breaking of .01. If their probabilities of breaking are independent of
each other then the probability of BOTH breaking is .0001 (1 in
10,000).

Perhaps each G1000 install should be accompanied by a totally seperate
GPS/Com, much like it has totally seperate AI, airspeed and altimeter.

It does. There are two GPS units, with two antenna. The antenna are
located in the base of the comm antennas. (some students get confused
by the GPS antenna behind those, but its just for XM weather).

Before take off part of the take off checklist is to go to the aux page
and see the signal strength for both GPS units. I've had the GPS fail
in flight and only noticed a "ALERT" pop up, but no change in service.

-Robert, G1000 CFII

On 6 Oct 2006 10:08:22 -0700, "Robert M. Gary"
wrote:

It does. There are two GPS units, with two antenna. The antenna are
located in the base of the comm antennas. (some students get confused
by the GPS antenna behind those, but its just for XM weather).

Actually, on the newer installs the LH antenna fin is an
XM/COM/GPS-in-one. RH fin is just COM/GPS and the only other
protuberance on the upper center fuselage is the OAT probe.

Doug writes:

The key is REDUNDANCY. Lets say computer one has a probability of
breaking of .01 (1 out of 100). Computer B has a probability of
breaking of .01. If their probabilities of breaking are independent of
each other then the probability of BOTH breaking is .0001 (1 in
10,000).

The problem is common-mode failures. If one computer has a software
bug, the other one will have it, too, unless the two computers contain
different software. So just duplicating parts won't necessarily help.
You just end up with two G1000's rebooting instead of one.

--
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