On Tue, 06 Sep 2005 09:14:49 +0200, Greg Farris
wrote:
In article ,
says...
I rent from a Cessna dealer FBO at VNY. The procedure there is:
Throttle - open 1/4 inch
Mixture - Idle Cutoff
Propeller area - Clear
Master Switch - ON
Beacon - ON
Aux Fuel Pump - ON
Mixture - Advance full - 2 to 3 seconds, then return to Idle Cutoff
Aux Fuel Pump - OFF
Ignition - START
Mixture - Advance full, when engine fires
Works every time for me.
BTW... same procedure when the engine is hot - EXCEPT - Mixture -
advance full - 1 second, then return to Idle Cutoff.
Pretty close to the standard method - but why use a "timed" method to
determine fuel flow from the pump, when there is an instrument in front
of you that gives precise information? If you didn't have a fuel flow
guage, or suspected that it wasn't working, this would be a good backup
method - but on the ones I've flown this guage is always working, and
gives a reliable indication for the starting procedure.
G Faris
The reason given by the FBO was that the fuel flow meter in "some"
of the injected 172's is either slow to respond or doesn't read
accurately at the aux fuel pump flow rate. And it is easier to
flood the engine using the fuel flow meter. Don't know how true
that is, but the timed method (using a simple one thousand, two
thousand count) is accurate enough.
I guess if you are flying your own plane or the same one every time,
using the fuel flow meter would be more convenient once you knew
what the fuel flow meter should read to properly start your engine.
The only place I see a problem would be starting a hot engine.
Apparently you don't want as much fuel in there under that
condition. Maybe that would be a lower fuel flow rate.
Ron Kelley
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