There's a few ways to modulate the fuel pump correctly. The MegaSquirt EFI system can handle sending PWM out to the fuel pump to maintain the correct psi.
Ford has a Fuel Pump Driver Module (FPDM) that takes a PWM input signal, outputs PWM at 20-30 amps driving current (fuel pump or any accessory).
For SSR relay route, Hella H41773001 handles 32A
I'm not sure, but also a nitrous solid state relay might work too. All of this is untested, just saved up in my research folders for version 2.0 of plane. Finding a good external fuel pump is the hard part. Aeromotive A1000 handles PWM, but at a price ~$400. Can't find any external Walbro's that will, only internal.
- Matt Boiteau
On 8/23/2017 10:51:37 AM, alex <flyrotary@lancaironline.net> wrote:
What fuel regulator do you guys recommend?
My current setup uses a duplex fuel valve (came with the kit) drawing fuel from either L or R front tank and returning it to the same tank. The L & R rear tanks pump their fuel into their respective front tanks, via a facet pump on each wingtip.
I like Tracy's idea of regulating fuel pressure by modulating the fuel pump.
As a crude method I had considered a DC controller on the primary pump a while back to get more "electrical" range out the batteries when crossing water with a possible alternator failure, but that's a project for a few years away.
What's everyone using on their conventional return system setups and any reasoning behind it?
Alex Molteno