flyrotary@lancaironline.net Mailing List Archive

If you are using the larger injectors in primary position (like anything above around 460 cc/min) then idle can get to be a bit on the rich side, lowering fuel pressure can help out on this end - but the reduced flow on the top end can cause leaning problems.

I fly with 460 cc/min injectors and find that 43 psi gives me the best all around performance. Larger injectors may do better with slightly lower pressure.

----- Original Message -----

From: Mike Wills

To: Rotary motors in aircraft

Sent: Sunday, May 04, 2008 11:06 PM

Subject: [FlyRotary] Re: Renesis First Start

That's interesting. When I was first starting to test my rotary I had to back the fuel pressure way down to get it to run relatively well. I'm backed off as far as the Aeromotive regulator will go and indicating about 33psi. Now that things are running better maybe I should try to bump it back up a little. I think Dave Leonard told me he had to go down on pressure as well. What is the consensus opinion?

Still some little tuning issues but it's running well enough to taxi around now. Runs great above 3000 RPM. Maybe a revisit to fuel pressure will help.

Need to find a DAR and get this thing inspected/flying!

Mike Wills

RV-4 N144MW

----- Original Message -----

From: Bobby J. Hughes

To: Rotary motors in aircraft

Sent: Sunday, May 04, 2008 5:50 PM

Subject: [FlyRotary] Renesis First Start

Saturday with the help of Mark Steitle I was able to start my renesis. Had to run higher rpm's to keep to it running. Wideband O2 showed lean at lower rpm's. Today after adjusting the fuel pressure to 42 psi (was 30 psi) I was able to idle much lower. My Advanced Flight System EFIS\ engine monitor fuel injector circuit is not putting out a tach signal so no idea on the actual rpm's. Two primer clicks and it starts right up.

Bobby J Hughes