Please explain drawbacks?

In canards we have small sumps up against the fuselage to more or less provide a low spot for access to fuel. They have been known to run dry when fuel is down to gallons and fuel is sitting mostly in leading edge.

More importantly in a canard pusher a sump canister closer to the engine can significantly reduce the size and run of the high pressure fuel circuit.

In uncoordinated flight the high rate of flow of the EFI circuit could pump a small sump dry and return the fuel to the main part of the tank where it would not be returning to the sump in use. The sump or surge tank could avoid this.

 

Chrissi & Randi
www.CozyGirrrl.com
CG Products, Custom Aircraft Hardware
Chairwomen, Sun-N-Fun Engine Workshop

 

In a message dated 9/1/2011 5:41:09 P.M. Central Daylight Time, rwstracy@gmail.com writes:

Sumps can work but frequently require fixes for their drawbacks.   If you don't have a really good reason for needing one, why use one?

Tracy