Mailing List flyrotary@lancaironline.net Message #54577
From: Al Gietzen <ALVentures@cox.net>
Subject: RE: [FlyRotary] My Mistral Engine Status
Date: Wed, 20 Apr 2011 08:51:52 -0800
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
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Steve wrote:

 

3.  At 50% power, my fuel flow is 11 GPH rich and 9GPH lean.

This doesn’t seem right – at 50% power my 20B will run 9-10 gph leaned.

 

The tangential style mufflers are too power-robbing

My 20B got 265 hp at 6300 rpm on the dyno with the tangential muffler and secondary resonator. With 9.0 : 1 rotors and normally aspirated that’s not all bad.

But perhaps more importantly I now have 213 hour on the inconel tangential and 321 SS secondary; and they are still in good condition. And it is reasonably quiet.

Al G

 

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