Aux fuel pump
- Thread starter Neilr
- Start date
Yes, I fitted a Facet electric fuel pump beneath the tank 27 years ago. I can switch it on and off as needed, so as to run in series with the mechanical pump. There are no problems at all in doing this.
Ron.
Ron.
ghce
Well-Known Member
one good reason is that you can have fuel in the carb bowls immediately facilitating a fast start.
Another good reason is that pressurising the fuel line rather than drawing a vacuum can alleviate the symptoms of fuel vaporisation on those hot days where it can cause issue.
Graeme
Another good reason is that pressurising the fuel line rather than drawing a vacuum can alleviate the symptoms of fuel vaporisation on those hot days where it can cause issue.
Graeme
Spot on Graeme!
Ron.
Ron.
clive P62
Active Member
Hi Ron.
I have your pump set up fitted to my u/k 3500s since 1990 ( pretty sure you guys over there gave me the details)
Any signs of vapour lock in traffic you just switch on the small facet pump and in less than 5 seconds and your on your way with no break down.
Once on the move just turn pump off and run as normal on mechanical pump.
Clive.
I have your pump set up fitted to my u/k 3500s since 1990 ( pretty sure you guys over there gave me the details)
Any signs of vapour lock in traffic you just switch on the small facet pump and in less than 5 seconds and your on your way with no break down.
Once on the move just turn pump off and run as normal on mechanical pump.
Clive.
Hi Clive,
I do remember, I still have the airmails that you sent to me at the time.
You're absolutely right, the electric pump clearing any vapour lock issues in seconds after being switched on! Once on the go, switch off and return to the mechanical, or depending upon the ambient temps, you can leave it on for as long as needed.
Ron.
I do remember, I still have the airmails that you sent to me at the time.
You're absolutely right, the electric pump clearing any vapour lock issues in seconds after being switched on! Once on the go, switch off and return to the mechanical, or depending upon the ambient temps, you can leave it on for as long as needed. Ron.
j_radcliffe
Active Member
Low wing airplanes are set up in the same way. They have a fuel pressure gauge. You turn on the electric fuel pump prior to cranking, and allow the pressure to build up to about 5 psi. Then turn off, and then start on the mechanical fuel pump. That way you know both are functional prior to leaving the ground. You run both pumps for take off and landing. Mechanical pump only for taxi and cruise. In a plane the electric pump is known as a boost pump, although it does not boost performance, except when the mechanical pump fails. If the mechanical pump fails in cruise, then it is known to boost the pilots blood pressure!