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                           Engines-List Digest Archive
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                     Total Messages Posted Sat 07/29/06: 2
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Today's Message Index:
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     1. 06:43 AM - Re: Rear Prop Gov. Questions  (Gary Casey)
     2. 09:40 AM - Re: Re: Rear Prop Gov. Questions  (Hopperdhh@aol.com)
 
 
 
________________________________  Message 1  _____________________________________


Time: 06:43:28 AM PST US
From: Gary Casey <glcasey@adelphia.net>
Subject: Engines-List: Re: Rear Prop Gov. Questions

--> Engines-List message posted by: Gary Casey <glcasey@adelphia.net>

I'm afraid I can't answer the questions you ask, but can add that  
there is a "gotcha" on the rear governor.  Between the governor and  
the engine there is a thin steel plate that is very important.   
Sometimes, because it is stuck to the gasket on each side, it gets  
unknowingly discarded.  The gasket will probably seal without the  
plate, but possibly - and this has happened many times - the gasket  
will sooner or later blow out with the resulting total oil loss.  I'm  
not sure if this plate is only in the "D" dual mag engine or in all  
the rear-mounted governors.  Another important thing is to make sure  
that the steel line (make sure it is steel, not aluminum) to the  
front of the engine is supported in the proper locations.  There is  
an old AD note that covers this.

Gary Casey
>
> I am thinking of putting an IO-360-A1A engine in my RV-7A.  It  has  
> been
> flying with an IO-360-A1D6 which has a front mounted governor.
>
> Could someone on the list please tell me approximately what the  
> thickness  of
> the rear mounted prop governor adapter pad is on an IO-360-A1A?  I  
> have  an
> old one that measures about 2 1/16 inches.  Is there a thinner one   
> available?
>
> The dimension I need is from the accessory case to the prop   
> governor itself.
>
> Also, will the McCauley governor off the left front of my IO-360- 
> A1D6 work
> on the rear of the -A1A?  As far as I can tell there is about 3  
> percent
> difference in the drive ratio -- 0.866 vs 0.895.  I would assume  
> that the  governor
>
> could be adjusted for this difference.  Is there some other reason   
> why it
> won't work?
>
> Thanks,
> Dan Hopper
> RV-7A


________________________________  Message 2  _____________________________________


Time: 09:40:12 AM PST US
From: Hopperdhh@aol.com
Subject: Re: Engines-List: Re: Rear Prop Gov. Questions


Gary,

Thanks for the information.  I have printed it out and will make sure  I have 
the plate if I should have it.

do not archive

Thanks, 
Dan Hopper
RV-7A


In a message dated 7/29/2006 9:44:36 A.M. Eastern Daylight Time,  
glcasey@adelphia.net writes:

-->  Engines-List message posted by: Gary Casey  <glcasey@adelphia.net>

I'm afraid I can't answer the questions  you ask, but can add that  
there is a "gotcha" on the rear  governor.  Between the governor and  
the engine there is a thin  steel plate that is very important.   
Sometimes, because it is  stuck to the gasket on each side, it gets  
unknowingly  discarded.  The gasket will probably seal without the  
plate,  but possibly - and this has happened many times - the gasket  
will  sooner or later blow out with the resulting total oil loss.  I'm   
not sure if this plate is only in the "D" dual mag engine or in all   
the rear-mounted governors.  Another important thing is to make  sure  
that the steel line (make sure it is steel, not aluminum) to  the  
front of the engine is supported in the proper locations.   There is  
an old AD note that covers this.

Gary  Casey
>
> I am thinking of putting an IO-360-A1A engine in my  RV-7A.  It  has  
> been
> flying with an  IO-360-A1D6 which has a front mounted governor.
>
> Could someone  on the list please tell me approximately what the  
>  thickness  of
> the rear mounted prop governor adapter pad is on an  IO-360-A1A?  I  
> have  an
> old one that measures  about 2 1/16 inches.  Is there a thinner one   
>  available?
>
> The dimension I need is from the accessory case to  the prop   
> governor itself.
>
> Also, will the  McCauley governor off the left front of my IO-360- 
> A1D6 work
>  on the rear of the -A1A?  As far as I can tell there is about 3   
> percent
> difference in the drive ratio -- 0.866 vs  0.895.  I would assume  
> that the   governor
>
> could be adjusted for this difference.  Is there  some other reason   
> why it
> won't  work?
>
> Thanks,
> Dan Hopper
>  RV-7A