From: "Greg Fuess" <gregory_fuess@yahoo.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: Fuel Consumption Questions
Date: Sun, 21 Mar 2004 00:19:23 -0600
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Hi Fellow Rotor heads,

I am getting very close to starting construction of an RV-7 (much closer
than last year when I said this! - should start in 8~10 weeks) and very
interested in the potential for the Renesis engine in this application
(can't wait for Tracy to get his installed so we can read the performance
reports).  I do have one question that is difficult for me to get my arms
around.  What kind of fuel burn are you guys experiencing that are flying
your 13Bs?  Turbocharged 13Bs? -at various power settings and altitudes?  Is
there a data reference site anywhere that could provide this information?

Ed Anderson's Rotary Power vs. 2-3-2 Cooling BTU calculation spreadsheet
indicated 12.4 to 14.9 gph at 5k to 6k rpm (all for 1,500' alt).  This seems
not to compare well to the lyconosaurus published consumption rates for a
180 hp engine, though I have read elsewhere on the internet that the rotary
consumption should be similar.  Am I misreading or misusing Ed's
spreadsheet, or should I get used to the higher consumption rate?  Are the
Lycoming consumption rates bogus?

I am something of a lurker here, but as I get closer to the "date", I am
getting more and more detail conscientious.  Appreciate any and all
thoughts.

Best Regards,

Greg Fuess