flyrotary@lancaironline.net Mailing List Archive

If your pressure is dancing around with the throttle steady, I would suggest you might have a leak in the induction system unless you are right on the point where the EC-2 is switching between addresses. If the fluctuation continues when you move the throttle slightly, I would think leak. If you check for leaks, don’t forget the tubing going to the controllers and monitors.

Bill B

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook
Sent: Wednesday, April 01, 2009 10:31 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: RV10 Transition Training \ EM2

One or two tenths is not significant (1 map address covers about 7 tenths of manifold pressure) so that could not be the problem. Several very rough spots is a major tuning problem.

Tracy

On Tue, Mar 31, 2009 at 10:26 PM, Bobby J. Hughes <bhughes@qnsi.net> wrote:

That will work Tracy. I don't think I have major tuning problems but I need to see the map table addresses and each rotors EGT to be sure. My manifold pressure jumps around one or two tenths and is hard to hold at a constant setting. The mixture is manually adjustable to 7500 rpm or 34" + depending on prop settings. But I have several very rough spots that would keep me from flying. My manifold pressure ports are located in the super charger discharge manifold and I suspect they are seeing pulses.

Bobby

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook
Sent: Tuesday, March 31, 2009 6:06 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: RV10 Transition Training \ EM2

Hello Bobby,
I can have your EM3 ready in a week if that works for you. Always remember that autotune is not a fix for major tuning problems. If there is a significant snag in the EC2/3 tuning , it means that something is wrong or that the tuning procedure is not fully understood. Always find out which it is before flight.

Tracy

On Tue, Mar 31, 2009 at 12:26 PM, Bobby J. Hughes <bhughes@qnsi.net> wrote:

I completed another major milestone this weekend in preparation for first flight. All I can say is holy s***. I flew with Alex D just south of Dallas. With the IO-540, 3 adult males, full fuel and air conditioner we where seeing 2k per minute climb rates. This plane is amazing. Hopefully my little Renesis at 34" MAP and 100 pounds lighter will produce about 80% of this performance.

I would like to borrow or rent a EM2 that has not been installed with auto tune capability for a couple of weeks. I have an EM3 on order but no firm delivery date yet. I will pay at a minimum shipping both ways.

Bobby J Hughes

DAR inspection hopefully next week.