dumb Hobbs question

Center_Mid · August 12th, 2003, 11:18

In the 172, does the Hobbs meter start running only when the engine starts, or when the master switch is turned on?

So, if I flick the master on to get an IFR clearance while the engine is turned off, am I running up the Hobbs time?

Eagle · August 12th, 2003, 11:35

the hobbs runs off the oil pressure if I remember correctly, so if the engine is not running, it doesn't advance.

EatSleepFly · August 12th, 2003, 12:12

That is correct....unless the owner changed it around or something. Theres a lot of different ways people rig Hobbs meters, but like Eagle said...Cessnas come from the factory with it hooked to oil pressure.

ananoman · August 12th, 2003, 19:10

Enjoy it while it last, most twins run off the master switch.

DanTheMan · August 16th, 2003, 15:43

I've heard that some twins run the hobbs off of the oil pressure in one of the engines, and if you know which one, you can taxi out on the other engine and save a couple bucks. anyone heard of this? Not that I would do it, just curious.

Luftpost · August 16th, 2003, 17:10

Ever tried to taxi a twin with just one engine operating??

I'd rather run the hobbs meter.

DanTheMan · August 16th, 2003, 17:21

never tried to taxi a twin at all!

hopefully soon!

EatSleepFly · August 16th, 2003, 18:40

C-337's taxi just fine on one engine!

DanTheMan · August 17th, 2003, 12:09

Didn't get it until I went looking for a picture of a c-337!

c-337

August 12th, 2003, 11:18	#1
Center_Mid Junior Member Join Date: Jun 2003 Location: Seattle, WA Posts: 213	dumb Hobbs question In the 172, does the Hobbs meter start running only when the engine starts, or when the master switch is turned on? So, if I flick the master on to get an IFR clearance while the engine is turned off, am I running up the Hobbs time?

August 12th, 2003, 11:35	#2
Eagle Banned Join Date: Oct 2000 Posts: 1,272	Re: dumb Hobbs question the hobbs runs off the oil pressure if I remember correctly, so if the engine is not running, it doesn't advance.

August 12th, 2003, 12:12	#3
EatSleepFly Old Skool Join Date: Dec 2002 Location: ?? Posts: 4,600	Re: dumb Hobbs question That is correct....unless the owner changed it around or something. Theres a lot of different ways people rig Hobbs meters, but like Eagle said...Cessnas come from the factory with it hooked to oil pressure.

August 12th, 2003, 19:10	#4
ananoman Senior Member Join Date: Dec 2002 Posts: 916	Re: dumb Hobbs question Enjoy it while it last, most twins run off the master switch.

August 16th, 2003, 15:43	#5
DanTheMan Junior Member Join Date: May 2003 Location: SoCal Posts: 184	Re: dumb Hobbs question I've heard that some twins run the hobbs off of the oil pressure in one of the engines, and if you know which one, you can taxi out on the other engine and save a couple bucks. anyone heard of this? Not that I would do it, just curious.

August 16th, 2003, 17:10	#6
Luftpost Junior Member Join Date: Nov 2001 Location: Missouri Posts: 89	Re: dumb Hobbs question Ever tried to taxi a twin with just one engine operating?? I'd rather run the hobbs meter.

August 16th, 2003, 17:21	#7
DanTheMan Junior Member Join Date: May 2003 Location: SoCal Posts: 184	Re: dumb Hobbs question never tried to taxi a twin at all! hopefully soon!

August 16th, 2003, 18:40	#8
EatSleepFly Old Skool Join Date: Dec 2002 Location: ?? Posts: 4,600	Re: dumb Hobbs question C-337's taxi just fine on one engine!

August 17th, 2003, 12:09	#9
DanTheMan Junior Member Join Date: May 2003 Location: SoCal Posts: 184	Re: dumb Hobbs question Didn't get it until I went looking for a picture of a c-337! c-337

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