Hobbs

I have seen dozens of Hobbs meters fail (they are used on plently of
devices, other than airplanes) but never in they way you suggest. As
others here have mentioned, their failure mode is that they just stop.
Frequently it's a mechanical (gear-drive) failure, and you can see the
meter "trying" to advance, but it doesn't. These are
escapement-controlled devices (like mechanical watches) so a considerable
speed error would be unexpected. They are esay to misread though (grin).



In article om,
says...


Ok, I am *almost* embarrased to ask this question, but here goes. Do
Hobbs meters ever "go bad"? No, this isn't a joke!

I recently took a flight from KLOU-KWWD-KLOU. It was IFR and I wrote
down my off and land times, which coorespond with the FlightTracking
times within a couple of minutes.

The hobbs time was 10.7. The flight time was 9.6. Not whining here,
but it was a little hard to believe that I had over an hour of taxi/
start time on this!

Just wondering..

--Man would that be some kind of AD-- LOL!

On Jul 3, 2:53 am, Airbus wrote:
I have seen dozens of Hobbs meters fail (they are used on plently of
devices, other than airplanes) but never in they way you suggest.

This was on an Arrow, and that is what I thought as to how it would
fail.. Interesting about being wired to the master...
I just recently started renting this Arrow, so I'll keep a closer
watch on the Hobbs and tach now.

I suppose that we can all dream for a slower hobbs