Bil4381
Well-Known Member
- Joined
- Oct 17, 2007
- Messages
- 884
Transfer Pumps,
The Regs for homebuilt aircraft where I fly, won't allow a fuel feed system like the ones described above. That is where the Aux tank only supplies fuel to the main tank.
My main and aux tanks feed the fuel selector valve, then to the gascolator, then to the electric diaphragm pump, then through the firewall to the mechanical pump and to the carb.
Thus I have two independent sources of fuel. True you can't transfer fuel but if the tanks feed the carburetor there is no need to.
During takeoff, landing and while switching tanks I turn the electric pump on.
Typically I use the main tank (6gals) for takeoff and landing and do all the cruise/climb and cruise flying on the Aux tank (10gals).
The gravity fed fuel from both tanks flows easily through the electric pump when it is off.
I have left the pump on, on the ground, when the tank was empty. No harm comes from it since it's a diaphragm pump. This is why they are popular.
Bill E
The Regs for homebuilt aircraft where I fly, won't allow a fuel feed system like the ones described above. That is where the Aux tank only supplies fuel to the main tank.
My main and aux tanks feed the fuel selector valve, then to the gascolator, then to the electric diaphragm pump, then through the firewall to the mechanical pump and to the carb.
Thus I have two independent sources of fuel. True you can't transfer fuel but if the tanks feed the carburetor there is no need to.
During takeoff, landing and while switching tanks I turn the electric pump on.
Typically I use the main tank (6gals) for takeoff and landing and do all the cruise/climb and cruise flying on the Aux tank (10gals).
The gravity fed fuel from both tanks flows easily through the electric pump when it is off.
I have left the pump on, on the ground, when the tank was empty. No harm comes from it since it's a diaphragm pump. This is why they are popular.
Bill E
