Tue Jan 08, 2019 11:32 am
#1663681
Question for anyone flying an SR22.
How do you use the fuel boost pump?
On the ground in most aeroplanes with low wings and two position fuel cocks I teach to swap tanks as part of the preflight actions.
Often start on one side then swap tanks for the runup and take off using that tank.
If it takes a while for the engine to stop running on one tank I run it for a little longer than the expected fuel off endurance, change tanks while taxying if I want it to run longer on the tank I will use for takeoff. ***
In any case on the ground I like to do this with the electric pump off so that the engine pump is proven to be operational.
I prefer to do the runup with the electric pump off as well.
The Cirrus SR22 checklist does not have anything about turning the fuel pump off after engine start.
It is optional on or off in the cruise.
So I am curious since I do not fly this type as to what Cirrus pilots on here do on the ground after engine start.
Do you leave the electric boost pump on for taxy runup climb cruise and approach? Or do you give it a break on the taxy and in the cruise?
In most aeroplanes the electric pump is a support unit rather than an essential full time unit.
***I often ask pilots how long will the engine run on the ground before it stops with the fuel turned off.
This especially when the fuel is swapped from one side to the other as part of the checklist, but too quick for the engine to potentially stop. A Cessna 172 will run for longer with the fuel off than the amount of time I have seen pilots take to change left and right.
One would hope that the engine would stop on the runup if there was a problem with the fuel flow before takeoff if there’s a problem.
How do you use the fuel boost pump?
On the ground in most aeroplanes with low wings and two position fuel cocks I teach to swap tanks as part of the preflight actions.
Often start on one side then swap tanks for the runup and take off using that tank.
If it takes a while for the engine to stop running on one tank I run it for a little longer than the expected fuel off endurance, change tanks while taxying if I want it to run longer on the tank I will use for takeoff. ***
In any case on the ground I like to do this with the electric pump off so that the engine pump is proven to be operational.
I prefer to do the runup with the electric pump off as well.
The Cirrus SR22 checklist does not have anything about turning the fuel pump off after engine start.
It is optional on or off in the cruise.
So I am curious since I do not fly this type as to what Cirrus pilots on here do on the ground after engine start.
Do you leave the electric boost pump on for taxy runup climb cruise and approach? Or do you give it a break on the taxy and in the cruise?
In most aeroplanes the electric pump is a support unit rather than an essential full time unit.
***I often ask pilots how long will the engine run on the ground before it stops with the fuel turned off.
This especially when the fuel is swapped from one side to the other as part of the checklist, but too quick for the engine to potentially stop. A Cessna 172 will run for longer with the fuel off than the amount of time I have seen pilots take to change left and right.
One would hope that the engine would stop on the runup if there was a problem with the fuel flow before takeoff if there’s a problem.
MichaelP
Wandering the World
Wandering the World