REFLECTOR:Rotary engine

Tue, 4 Nov 2003 07:13:41 -0800

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What is the BSFC up to on those larger rotaries?

They'll run about the same as a Lyc.  Rotaries run well leaned out to
150+ lean of peak EGT.  Guys flying claim as low as about 0.47 lb/hp-hr.
I got numbers of .49 - .50 on the dyno, but is hard to know whether they
are meaningful because on the dyno you don't know if you are on the prop
load curve.  Max power point (about 100 rich of peak) was more like 0.55
.  Of course this is all with 85-87 octane mogas (auto fuel) which
rotarys like just fine.

Al

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color=3Dblue face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:blue'>What is the BSFC =
up to on
those larger rotaries?</span></font></p>

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<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
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style=3D'font-size:12.0pt'>&nbsp;</span></font></p>

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margin-left:3.0pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>=

They&#8217;ll run about the same =
as a Lyc.&nbsp;
Rotaries run well leaned out to 150+ lean of peak EGT. &nbsp;Guys flying =
claim as
low as about 0.47 lb/hp-hr.&nbsp; I got numbers of .49 - .50 on the =
dyno, but
is hard to know whether they are meaningful because on the dyno you =
don&#8217;t
know if you are on the prop load curve.&nbsp; Max power point (about 100 =
rich
of peak) was more like 0.55 .&nbsp; Of course this is all with 85-87 =
octane mogas
(auto fuel) which rotarys like just fine.

<p class=3DMsoPlainText><font size=3D2 color=3Dblue face=3DVerdana><span
style=3D'font-size:11.0pt;font-family:Verdana;color:blue'>&nbsp;</span></=
font></p>

<p class=3DMsoPlainText><font size=3D2 color=3Dblue face=3DVerdana><span
style=3D'font-size:11.0pt;font-family:Verdana;color:blue'>Al</span></font=
></p>

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