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Message-Id: <d1be393f8ddc2891eb265e9fd0d2d708@gmail.com>
From: Hans Conser <hansconser@gmail.com>
Subject: Re: [FlyRotary] Re: Rotor identification
Date: Sun, 26 Feb 2006 07:54:47 -0700
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
X-Mailer: Apple Mail (2.623)


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On Feb 25, 2006, at 5:03 PM, Lehanover@aol.com wrote:

>
> In a message dated 2/25/2006 6:49:45 PM Eastern Standard Time,=20
> crayd@cableone.net writes:
>>
>> I bought this pair of used rotors to build up a new motor so I can=20
>> retrieve my RV-6. They look different in the compression chamber=20
>> "tub" area, otherwise they look=A0identical. They both are marked "D"=20=

>> for the weight code. Can anyone identify these and verify if they are=20=

>> OK to use ? I am thinking if the compression ratio is different, it=20=

>> may run rough even=A0if they=A0weigh the same. I remember Ed posting=20=

>> something about a way to measure the depth, but I cannot find it in=20=

>> my sea of saved emails.
>> =A0
>> Chuck Dunlap
>> N616RV 13B
>>

Chuck they are definitely different CR, as they are from different=20
years across the split where Mazda increased the compression ratio. =20
The fully machined rotor depressions are 1989 or above.  The partially=20=

cast rougher depressions on the rotor on the left means it is 1988 or=20
newer, therefore a heavier weight and lower compression than the rotor=20=

on the right with a machined face.

Hans

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On Feb 25, 2006, at 5:03 PM, Lehanover@aol.com wrote:


<excerpt>

<fontfamily><param>Arial</param><smaller>In a message dated 2/25/2006
6:49:45 PM Eastern Standard Time, crayd@cableone.net =
writes:</smaller></fontfamily>

<excerpt>

<fontfamily><param>Arial</param><smaller>I bought this pair of used
rotors to build up a new motor so I can retrieve my RV-6. They look
different in the compression chamber "tub" area, otherwise they
look=A0identical. They both are marked "D" for the weight code. Can
anyone identify these and verify if they are OK to use ? I am thinking
if the compression ratio is different, it may run rough even=A0if
they=A0weigh the same. I remember Ed posting something about a way to
measure the depth, but I cannot find it in my sea of saved =
emails.</smaller></fontfamily>

<fontfamily><param>Arial</param><smaller>=A0</smaller></fontfamily>

<fontfamily><param>Arial</param><smaller>Chuck =
Dunlap</smaller></fontfamily>

<fontfamily><param>Arial</param><smaller>N616RV =
13B</smaller></fontfamily>


</excerpt></excerpt>

Chuck they are definitely different CR, as they are from different
years across the split where Mazda increased the compression ratio.=20
The fully machined rotor depressions are 1989 or above.  The partially
cast rougher depressions on the rotor on the left means it is 1988 or
newer, therefore a heavier weight and lower compression than the rotor
on the right with a machined face.


Hans


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