Colin, I run 2 Facet pumps (from ACS) parallel because I do not have an engine driven pump. I have one pump running whenever the alternator has output, the other is additional through a switch in the dashboard. My fuel pressure reads just on 1 psi with standard fuel tank full, and a little below 1 psi with full tank almost empty, plane level. With one pump I have 5 psi, 2 pumps 5,5 psi. The fuel flow test with 17° nose up showed that the gravity feed is not producing enough fuel flow. I had to amend my Ops Manual to perform Takeoff and approach/landings with both pumps on.
Another benefit for the use of pumps is that you are less susceptible for bubbles in the fuel system. A friend crashed his BX-2 (Cherry) 4 weeks ago because of what it looks currently where bubbles in the fuel system. He is ok and will be released from hospital today...... Christian OE-VPD http://www.members.aon.at/oevpd -----Original Message----- From: Colin [mailto:crain...@cfl.rr.com] Sent: Donnerstag, 03. Juli 2003 17:39 To: KR builders and pilots Subject: KR>Carb fuel pressure Netters, Does anyone know how much fuel pressure to run if adding an electric fuel pump to a gravity flow setup for takeoffs and climbs, go-around etc... I have an 1835VW with Ellison carb, gravity flow. I want to add an electric pump to make sure during initial climbout, and on approach to landing/possible go-around I am protected against fuel starvation. Colin Rainey KR2(td) crain...@cfl.rr.com Sanford, Florida FLY SAFE!!!!_______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html
