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Message-ID: <450616.32582.qm@web111514.mail.gq1.yahoo.com>
Date: Mon, 8 Nov 2010 09:26:17 -0800 (PST)
From: Tom Walter <roundrocktom@yahoo.com>
Subject: Re: Current "state of the art" in rotaries - potential Bearhawk install
To: flyrotary@lancaironline.net
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Dustin,

I'd recommend to start building the plane.  If scratch building, start on wings, 
then on fuselage.    You'll have a  few years to think about what engine to use 
during this process.  


13B - Normal porting.  180hp which is good for a Bearhawk
13B - Peripheral Port.  250hp  which is excellent.
20B - w/ normal porting.  300hp?   Initial Engine cost a little more expensive, 
but very doable as most rebuild parts will come from the 13B.

I'm thinking of 13B with normal porting, then a peripheral port.   Both engines 
being near identical for FWF installations, so conversion is not that 
difficult.  Goal is to get flying, get everything debugged, size radiators for 
40% larger than needed (so when HP is increased, they should remain the same for 
oil and water cooling).

Do you have plans on putting it on floats?  I.e. I can see the increase hp of 
the 20B, but for hp/weight trade off on a Peripheral Port 13B it gives a nice 
sweet spot of decent hp with less weight.

Elden Yates built the first Rotary Powered Bearhawk, he had it for sale on 
Barnstormers, but never did see a full report on his installation. Often when 
planes are resold, they are harder to sell unless fitted with an aircraft 
engine.  Just the way it it (Tom Yoehman never did sell his V6 Ford Powered 
Bearhawk, until he removed the engine and installed a good - but used 0-360 with 
fixed prop... sold a few weeks later).  


My goal is to build "simple, but light".   Hence engine choice, basic panel, 
13B, fixed prop.   I'll go with Dual Batteries, but other than than nothing too 
fancy (single alternator, etc).  


Nothing to show on the engine, but firewall locations (remember that 6 degree 
set back for the firewall!) and the Mount I'm planning on using. You can find 
cheap rusty cores when you go to mock up the engine mount.  I need the PSRU for 
nose, cowling, but lots to do before I get to that so no rush.

http://www.mykitlog.com/twalter

Tom Walter
Bearhawk QB#59