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Date: Sun, 26 Sep 2010 07:38:05 +0800
Message-ID: <AANLkTimwcVwEdBVwDWkh_8dcKHfX=VQf3R2F92yGuLyD@mail.gmail.com>
Subject: Re: [FlyRotary] Re: simple dyno
From: Andrew Martin <andrew@martinag.com.au>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Kely, Bill, George

I have the RD1-c gearbox so bar rpm will be 2456 if and only if I can get
there with my non-tuned intake & exhaust.
1350mm x 90mm is 53.15=94x3.542=94

72" and 75=94 is way too long, according to the spreadsheet I=92d be lucky =
to
get 1300 prop rpm. the biggest I would attempt with the Renesis is
1500x100mm or 59.055=94x3.937=94, I apologise for the earlier confusion, I=
=92m
Australian and work best with metrics.

the calculation is over my head also, I just copied it from the spreadsheet=
.
it lost formatting in the copy paste, the 3 & 5 are power of. X section =3D
width.

Longer, thicker bars would only be useful if you wanted to plot hp at lower
rpm or could produce more Hp than I=92m expecting. I just need a load on th=
e
engine to run it, thought I may as well have something that gives a result,
whether it is accurate or not is immaterial, if changes to the engine resul=
t
in higher rpm=3D progress, lower rpm =3D regression.

Andrew martin

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Kely, Bill, George<div><br></div><div>I have the RD1-c gearbox so bar rpm w=
ill be 2456 if and only if I can get there with my non-tuned intake &amp; e=
xhaust.</div><div>1350mm x 90mm is 53.15=94x3.542=94</div><div><br></div><d=
iv>
72&quot; and 75=94 is way too long, according to the spreadsheet I=92d be l=
ucky to get 1300 prop rpm. the biggest I would attempt with the Renesis is =
1500x100mm or 59.055=94x3.937=94, I apologise for the earlier confusion, I=
=92m Australian and work best with metrics.</div>
<div><br></div><div>the calculation is over my head also, I just copied it =
from the spreadsheet. it lost formatting in the copy paste, the 3 &amp; 5 a=
re power of. X section =3D width.</div><div><br></div><div>Longer, thicker =
bars would only be useful if you wanted to plot hp at lower rpm or could pr=
oduce more Hp than I=92m expecting. I just need a load on the engine to run=
 it, thought I may as well have something that gives a result, whether it i=
s accurate or not is immaterial, if changes to the engine result in higher =
rpm=3D progress, lower rpm =3D regression.</div>
<div><br></div><div>Andrew martin</div><div><br><br>
</div>

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