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

From: sqpilot@earthlink

To: Rotary motors in aircraft

Sent: Tuesday, March 30, 2004 8:06 PM

Subject: [FlyRotary] Re: No rev-2 flying yet (Tracy, see comments in red)

Hi, Ed.....I am not trying to answer for Rusty.....just trying to add my results, as my two injectors in the TWM throttle body are all the way over on the cool side of the engine also.   I don't think I ever heard the engine crank longer than 3 or 4 seconds before coming to life, both early morning, (40 degrees), mid day ( 70 degrees), or evenings (50? degrees). Most of the time, it fires up within the first one or two revolutions.  I still have fuel dripping out of the throttlebody intake holes immediately after shutdown, but I think that is because it is still too rich.  I finally got my EGT installed, and it is showing around 700 degrees at an idle speed of around 1500 rpm. (It shows approximately the same temps around 2500 rpm, maybe up to 790 degrees).  Anyways....as far as starting, I only wish my car would start that easily.  Just one more opinion.  Paul Conner

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

From: Ed Anderson

To: Rotary motors in aircraft

Sent: Tuesday, March 30, 2004 12:36 PM

Subject: [FlyRotary] Re: No rev-2 flying yet (Tracy, see comments in red)

I am curious Rusty about how easy/hard to start on a cool morning with the injectors 30" away.  On my last manifold all 4 were approx 24" away and starting on a cold morning was a b----, I would sometimes use up the battery charge.  Now all 4 injectors are approx 5" away from the inlet to the combustion chamber and it starts on the first turn or two of the prop.

 

Ed

 

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC

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

From: Russell Duffy

To: Rotary motors in aircraft

Sent: Tuesday, March 30, 2004 1:15 PM

Subject: [FlyRotary] Re: No rev-2 flying yet (Tracy, see comments in red)

This may occur because in one fraction of a second you are  opearting at WOT (lots of fuel flow)  and the next down to idle.   

 

 

In thinking about this some more, it would make sense that I didn't have nearly the same problem before.  In the rev-1 version, I had the primary injectors in the block, and the secondaries were only about 14 inches away.  Now, all four injectors are about 30 inches away, so there's a lot more fuel left in the intake when you chop the throttle.

 

I agree with Tracy that this isn't my normal operating mode, but when testing the engine, I like to try everything I can think of, so there won't be any unpleasant surprised in flight.  FWIW, the turbo used to throw a nice flame out the short pipe when I'd chop the throttle, but I don't know if that would make it to the end of a longer pipe, through a muffler.  

 

Rusty (off to test my O2 reading on the EM-2)