From: "Finn Lassen finn.lassen@verizon.net" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: First successful RV-4 Renesis engine run
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Message-ID: <f913da82-fba0-a6bc-cf84-b528f3e36314@verizon.net>
Date: Mon, 8 Jun 2020 20:56:06 -0400
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Yep.Except the next run pressing that button didn't do anything. But did 
go smooth.
Third run today couldn't get it to run smooth (didn't try hard).

When does shift from rough to smooth, RPM goes up and get a more 
continuous sound. When rough it's almost as if it doesn't fire half the 
time, yet mixture monitor shows close to ideal. Weird!

So still a mystery. Stuck seal? Air in fuel?
I have a returnless system. Regulator just after fuel pumps, returning 
directly to tank. 3/8" alum tube 3' to firewall, then a 3/8" EFI hose to 
a Standard filter sitting on top of engine and from there 5/16" EFI hose 
to Tee to primary and secondary fuel rails. Pressure sender at end of 
secondary fuel rail (where the damper normally sits). After the first 
run where I got up to operating temps, I could hear fuel boil after 
shutdown. Tracy is also using a returnless system in his RV-8, so it can 
be made to work. However, I may need to move the fuel filter into the 
fuselage so it doesn't get heated by the engine. Of course if the prop 
was on it would cool some.

Finn

On 6/8/2020 7:44 PM, Stephen Izett stephen.izett@gmail.com wrote:
> Progress Finn.
> Must have been encouraging the it went smooth!
>
> Cheers
>
> Steve
>
>> On 9 Jun 2020, at 12:26 am, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
>>
>> I fixed the engine monitor so it now shows RPM. Had been running it at real low RPMs. Still, very rough.
>>
>> Happened to press button 3 (Cancel) on the EM3 (not EC3) and engine started running smoothly (tested up to about 3,000 PRM). Still without prop.
>>
>> Could be a coincidence, will have to let engine cool down and try again. But first time out of 5 or more runs where it started running smoothly.
>>
>> Now I need to fix an oil lead at filter adapter and move exhaust pipe away from bottom of fuselage so it doesn't melt it and perhaps put on a prop.
>>
>> Finn
>>
>>
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