From: "Steven W. Boese" <flyrotary@lancaironline.net>
Received-SPF: none
 receiver=logan.com; client-ip=157.56.110.103; envelope-from=SBoese@uwyo.edu
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Request for Performance specs on VAF
Thread-Topic: [FlyRotary] Re: Request for Performance specs on VAF
Thread-Index: AQHRJXn5PbU3yDA1U0CnfduSmUcNsp6ov+pB
Date: Mon, 23 Nov 2015 00:54:56 +0000
Message-ID: <BN3PR0501MB1138A8D31C2FD1995FE0D64EB9070@BN3PR0501MB1138.namprd05.prod.outlook.com>
References: <list-8184742@logan.com>
In-Reply-To: <list-8184742@logan.com>
Accept-Language: en-US
Content-Language: en-US
received-spf: None (protection.outlook.com: uwyo.edu does not designate
 permitted sender hosts)
spamdiagnosticoutput: 1:23
spamdiagnosticmetadata: NSPM
Content-Type: multipart/alternative;
	boundary="_000_BN3PR0501MB1138A8D31C2FD1995FE0D64EB9070BN3PR0501MB1138_"
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Nov 2015 00:54:56.5201
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: f9cdd7ad-825d-4601-8e9c-a325e02d52da
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN3PR0501MB1138

--_000_BN3PR0501MB1138A8D31C2FD1995FE0D64EB9070BN3PR0501MB1138_
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

Charlie,


Full throttle was used with the mixture set to about 60 degrees lean of pea=
k EGT.  Running rich of peak gives significantly more power at the expense =
of higher fuel consumption:  higher speed but smaller mpg.


The performance of the two blade Performance Propellers and Aymar Demuth wo=
od props were similar to the 3 blade Warp Drive prop.  I didn't like the fo=
re/aft flutter of the wood prop at low power settings which may have contri=
buted to the RD1A front bearing coming loose in the housing and slamming fo=
re and aft to the point where aluminum from the casting and front plate wer=
e welded to the sides of the outer bearing race leaving pits in the casting=
 and plate.  The bearing never did spin in the housing.  This may not have =
happened if more crush had been applied to the bearing by the front plate. =
 A 0.010" thick brass shim behind the bearing and a new front plate seem to=
 have held up so far.


The two AC cores that were located behind the stock cooling inlets have bee=
n removed.  The radiator in the cowl is in the location under the PSRU wher=
e the oil to air heat exchanger was originally located.  This minimized the=
 weight change from adding the scoop system and the CG is still fine.  The =
intent was to eliminate all heat exchangers from inside the cowl and this m=
ay be possible with the two cores in the scoop.  Warm weather testing will =
tell, but that is months or hundreds of miles away.  There sure is a lot of=
 empty space in the forward cowling area now.


Steve


________________________________
From: Rotary motors in aircraft <flyrotary@lancaironline.net> on behalf of =
Charlie England <flyrotary@lancaironline.net>
Sent: Sunday, November 22, 2015 4:03 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Request for Performance specs on VAF

Thanks, Steve. I assume that all three measurements were at full throttle, =
right? (MAP ~=3Dambient air pressure?)

Haven't you flown with a regular wood prop in the past? Was it faster than =
the Warp Drive, or about the same speed?

And if I'm reading correctly, you still have your 'stock' radiators install=
ed & had just blocked off the airflow to the stock coolers?

Charlie


--_000_BN3PR0501MB1138A8D31C2FD1995FE0D64EB9070BN3PR0501MB1138_
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
<style type=3D"text/css" style=3D"display:none;"><!-- P {margin-top:0;margi=
n-bottom:0;} --></style>
</head>
<body dir=3D"ltr">
<div id=3D"divtagdefaultwrapper" style=3D"font-size:12pt;color:#000000;back=
ground-color:#FFFFFF;font-family:Calibri,Arial,Helvetica,sans-serif;">
<p>Charlie,</p>
<p><br>
</p>
<p>Full throttle was used with the mixture set to about 60 degrees lean of =
peak EGT.&nbsp; Running rich of peak gives significantly more power at the =
expense of higher fuel consumption:&nbsp;&nbsp;higher speed but&nbsp;smalle=
r mpg.</p>
<p><br>
</p>
<p>The performance of the two blade Performance Propellers and Aymar Demuth=
 wood props were similar to the 3 blade Warp Drive prop.&nbsp; I didn't lik=
e the fore/aft flutter of the wood prop at low power settings which may hav=
e contributed to the RD1A front bearing
 coming loose in the housing and slamming fore and aft to the point where a=
luminum from the casting and front plate were welded to the sides of the ou=
ter bearing race leaving pits in the&nbsp;casting and plate.&nbsp; The bear=
ing never did spin in the housing.&nbsp; This may
 not have happened if more crush had been applied to the bearing by the fro=
nt plate.&nbsp; A 0.010&quot; thick brass shim behind the bearing and a new=
 front plate seem to have held up so far.</p>
<p><br>
</p>
<p>The two AC cores that were located behind the stock cooling inlets have =
been removed.&nbsp; The radiator in the cowl is in the location under the P=
SRU where the oil to air heat exchanger was originally located.&nbsp; This =
minimized the weight change from adding the
 scoop system and the CG is still fine.&nbsp; The intent was to eliminate a=
ll heat exchangers from inside the cowl and this may be possible with the t=
wo cores in the scoop.&nbsp; Warm weather testing will tell, but that is mo=
nths or hundreds of miles away.&nbsp; There sure
 is a lot of empty space in the forward cowling area now.&nbsp; </p>
<p><br>
</p>
<p>Steve&nbsp;<br>
</p>
<br>
<br>
<div style=3D"color: rgb(0, 0, 0);">
<hr tabindex=3D"-1" style=3D"width: 98%; display: inline-block;">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font color=3D"#000000" face=3D"Calib=
ri, sans-serif" style=3D"font-size: 11pt;"><b>From:</b> Rotary motors in ai=
rcraft &lt;flyrotary@lancaironline.net&gt; on behalf of Charlie England &lt=
;flyrotary@lancaironline.net&gt;<br>
<b>Sent:</b> Sunday, November 22, 2015 4:03 PM<br>
<b>To:</b> Rotary motors in aircraft<br>
<b>Subject:</b> [FlyRotary] Re: Request for Performance specs on VAF</font>
<div>&nbsp;</div>
</div>
<div>
<div class=3D"moz-cite-prefix">Thanks, Steve. I assume that all three measu=
rements were at full throttle, right? (MAP ~=3Dambient air pressure?)<br>
<br>
Haven't you flown with a regular wood prop in the past? Was it faster than =
the Warp Drive, or about the same speed?<br>
<br>
And if I'm reading correctly, you still have your 'stock' radiators install=
ed &amp; had just blocked off the airflow to the stock coolers?<br>
<br>
Charlie<br>
</div>
<blockquote type=3D"cite">
<p><br>
</p>
<br>
</blockquote>
<br>
</div>
</div>
</div>
</body>
</html>

--_000_BN3PR0501MB1138A8D31C2FD1995FE0D64EB9070BN3PR0501MB1138_--