Comment

Comment by Don Morrisey on October 29, 2014 at 7:56pm

Dave, I'm doing something similar to you for the low fuel alarm. First this Cole Hersee warning light/buzzer installed in the panel(after testing it I think the "buzzer" will be heard even with headset on, it's very loud): http://www.colehersee.com/home/item/cat/231/4112-RC000/
It will be wired in conjunction with this mechanical switch installed in the header tank:
http://www.aircraftspruce.com/catalog/appages/fuelwarn.php?clickkey...

Comment by David J. Beaulieu on October 29, 2014 at 9:14am

Don,

You got it...the rubber hose portion of the return line will also incorporate a check valve (located in that compartment) prior to bottom of the header tank return connection.  The sump is mounted per Skytek's specs , and you can see that the the top of the sump is not aligned with the fuel supply outlet of the header tank.  I think the slight misalignment is by design, as it actually makes it a bit easier to put on the rubber connection hose!

Cheers!

Dave

Comment by David J. Beaulieu on October 29, 2014 at 9:04am

Joe,  I guess I went thru some of the "process" you went also,  Fussed around with custom made Atlee Dodge header tank behind the instrument panel, put it all aside and went with the Skytek design. In my opinion it was a simpler, more rigorously tested, overall better design for my needs.  I have retrofitted my wings with 1/2" 5052 lines for the vent/returns and will likely do so for the supply from the wing tank to fuselage and kind of mimic the Skytek install with respect to fuel flow routing.  Forward of pilot seat will be 3/8", s/s braided hose to a manual shutoff (ball valve type lever) along the left side of the fuselage interior, thru the coarse filter, then thru the firewall bulkhead to fuel pump manifold, fine fuel filter, red cube flowmeter to the injection rail. I have no definite plan at this point to install an additional sump/coalescer...there are a lot of mixed opinion regarding the need.  The only components I purchased was the header tank and sump along with their access, and closeout panel for the header tank.  I installed the header tank with nutplates to facilitate removal if necessary.  I did purchase an optical fuel low warning system ( http://www.aircraftextras.com/FuelSensor1.htm ) to at least have an "idiot light" on the panel in case the header tank draws down too low, I opted for visual only, no aural alert. 

As always interested in all thoughts, suggestions and opinions...

Dave

Comment by Joe Harrington on October 28, 2014 at 11:29pm

Dave, are you using any other Skytek components in your fuel system? I am installing a 912iS and had originally designed and constructed the complete fuel system before Rotech Research and Skytek co-designed and, more importantly, fully tested a fuel system that would work in an electronic fuel injection system. Even though I had many months of design and fabrication tied up into my original fuel system, I threw it all in the garbage and bought the complete fuel system from Skytek. In the end, I could not argue with the thoroughness that Rotech and Skytek put into their fuel system. I would think that it would work equally well for the UL Power injected engines.

Comment by Don Morrisey on October 28, 2014 at 10:06pm

So Dave, does the supply line come off the lower sump tank and the return will hook up to the bottom of the header tank? Then there will be a connection between the header tank and the sump tank? Do I have that right? I plan to use the Skytek system as well albeit for a rotax 912is.