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Date: Thu, 4 Dec 2008 17:19:38 -0500
From:  <taspilot@cox.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Renesis fuel burn
Cc: Rino <lacombr@nbnet.nb.ca>
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Rino
Please remove me from your mailing lists.
taspilot@cox.net

---- Rino <lacombr@nbnet.nb.ca> wrote: 
Thanks Tracy and Ed.

I know the EM2 is not reading right -- yet,  I am working on it.  I just wanted to know what I should expect for a reading.  I just changed the prop pitch -- again, it is now set at 18 deg. at 75 percent radius.  During the last prop. static test I got a maximum reading of 14.4 gph. 5985 rpm, map 29.   I know the engine is producing some power, I just sent in my Climb Test Report and recorded 3820 ft. for a 3 minute climb.  The Glass Goose was 1900 lb. gross for the test.  I keep the climb speed at 100 mph to have enough air flow to cool the engine.  I am working on the cooling system at the moment.   I would probably get a better climb rate at a speed around 80 mph.

For Ed.  
I flew in Tom's aircraft and I know this one performs better.  Tom's Glass Goose has a 160 hp Lycoming.
No water landings yet.  I am at the airport, until next summer - it is cold up here!
The prop is a 4 blade, 65 in. ground adjustable Warp Drive.  The redrive is the RD-1A with a ratio of 2.176:1.  I do not want to run the engine above 6500 rpm.  I am trying to achive 6500 rpm at top speed level flight.

One reading during flight: rpm 6350  MAP 29.6, fuel burn 10.8, EGT 1800  (i figure it was very lean).  I get about 120 mph level flight with an engine speed of 6000 rpm at 2000 feet, The airstrip is at a level of 490 ft.  I figure it is not too bad for a Glass Goose.

Rino


  ----- Original Message ----- 
  From: Tracy Crook 
  To: Rotary motors in aircraft 
  Sent: Saturday, November 29, 2008 4:10 PM
  Subject: [FlyRotary] Re: Renesis fuel burn


  If you haven't calibrated the EM2 fuel flow yet, the GPH reading does not mean anything.  Don't make any decisions based on that reading.   Calibrating the fuel flow is the most difficult and time consuming parts of EM2 setup.   That's the down side of doing it with such an inexpensive flow sensor ($0.00) since it has none.   The other option is to use a Floscan flow sensor with the EM2  but they are pricy.

    At 30" of manifold pressure and best power mixture setting and 6400 RPM you should get a fuel burn somewhere around 15 - 18 GPH.  The exact amount will depend on other factors like exact mixture setting, your intake manifold, exhaust system, air temp, etc.

  Tracy Crook


  On Thu, Nov 27, 2008 at 6:32 PM, Rino <lacombr@nbnet.nb.ca> wrote:

    Where can I get information on fuel burn and power for the renesis?
    The maximum fuel burn I can get on takeoff is 11.7 gph (reading on the EM2) at 64 00 rpm.   The EM2 is not fully calibrated yet!   I think I should be able to get a higher fuel burn than that.

    The other part of the problem.  What should be the intake manifold runner length on the Renesis.  Best power has to be between 6000 and 6500 rpm limited by the propeller and redrive configuration.   I cannot use more than 65" dia. prop.

    The present runner length is 17" and I think it is not enough.

    Rino Lacombe
    Renesis powered Glass Goose