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Rear Prop Gov. Questions

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Hopperdhh(at)aol.com
Guest

Posted: Fri Jul 28, 2006 9:21 am Post subject: Rear Prop Gov. Questions

 

 I searched the archives, but couldn't find answers to these  questions.

  

 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

Hopperdhh(at)aol.com
Guest

Posted: Mon Jul 31, 2006 10:31 am Post subject: Rear Prop Gov. Questions

I posted this last week, but didn't get answers.

  

 Maybe someone on the list could point me to a picture of a rear mounted=2 prop governor so I could get a feel for how much room there is.  Probably=2 an O-6 would be the same.

  

 Thanks,

 Dan

  

  

 I searched the archives, but couldn't find answers to these=2 questions.

  

 I am thinking of putting an IO-6-AA engine in my RV-7A.  It=2 has been flying with an IO-6-AD6 which has a front mounted governor.

  

 Could someone on the list please tell me approximately what the thickness=2 of the rear mounted prop governor adapter pad is on an IO-6-AA?  I have=2 an old one that measures about 2 /6 inches.  Is there a thinner one=2 available?  The dimension I need is from the accessory case to the prop=2 governor itself.

  

 Also, will the McCauley governor off the left front of my IO-6-AD6 work=2 on the rear of the -AA?  There is about  percent difference in the drive=2 ratio -- .866 vs .895.  I would assume that the governor could be=2 adjusted for this difference.  Is there some other reason why it won't=2 work?

  

 Thanks,

 Dan Hopper

 RV-7A

Dale Ensing

Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC

Posted: Mon Jul 31, 2006 4:15 pm Post subject: Rear Prop Gov. Questions

Dan,

 I'll try to get a decent picture tomorrow of my rear mounted govenor.0 However, my set up is a Woodward govenor on a O-360 in a 6A. But, if you think0 it well help I'll send the picture.

 Dale Ensing

  

 From: Hopperdhh(at)aol.com (Hopperdhh(at)aol.com) 

  	  Quote: 	
		     Maybe someone on the list could point me to a picture of a rear mounted0   prop governor so I could get a feel for how much room there is.  Probably0   an O-360 would be the same.

       

   Thanks,

   Dan

_________________
Dale Ensing
RV-6A
Aero Plantation
Weddington NC

aerobubba(at)earthlink.ne
Guest

Posted: Tue Aug 01, 2006 3:51 am Post subject: Rear Prop Gov. Questions

Hi Dan- 

 

 	  Quote: 	
		  I posted this last week, but didn't get answers.

 
	


Funny how that goes sometimes, with all the talent on this list!



 	  Quote: 	
		  Maybe someone on the list could point me to a picture of a rear mounted

prop 
	


 	  Quote: 	
		  governor so I could get a feel for how much room there is. Probably an 

O-360 would be the same.


	


It appears on page 2-4 of parts catalog PC-406-1.

 

I've an RV-8 with an IO-360-A1B6D with a Czech gov on the back so there is

no direct correlation to your installation.  My pad is about 7/8 thick and

I have about 4 1/8 between the rearmost part of the gov (the end of the

cable attach bolt) and the firewall. 



I do believe that all the gov's except Woodward have the same (AN)

footprint.  



According to what I get out of the parts catalog, the correct adaptor for

your installation would be #75545 if the case has studs and #78594 if your

installation uses cap screws.  Perhaps there is a part number on the

adaptor you have?  I wouldn't be at all surprised if you've got all you

need already!



Sorry I couldn't be of more direct assistance-



glen matejcek

aerobubba(at)earthlink.net

Hopperdhh(at)aol.com
Guest

Posted: Tue Aug 01, 2006 4:16 am Post subject: Rear Prop Gov. Questions

Dale,

  

 I think that other replies may have answered my question -- at least0 about the adapter.

  

 do not archive

  

 Thanks,

 Dan

  

  

  

 In a message dated 7/31/2006 8:17:36 P.M. Eastern Daylight Time,0 densing(at)carolina.rr.com writes:

    Dan,

   I'll try to get a decent picture tomorrow of my rear mounted0   govenor. However, my set up is a Woodward govenor on a O-360 in a 6A. But, if0   you think it well help I'll send the picture.

   Dale Ensing

    

   From: Hopperdhh(at)aol.com (Hopperdhh(at)aol.com) 

    	  Quote: 	
		       Maybe0     someone on the list could point me to a picture of a rear mounted prop0     governor so I could get a feel for how much room there is.  Probably an0     O-360 would be the same.

           

     Thanks,

     Dan



	
[/quote]

chaztuna(at)adelphia.net
Guest

Posted: Wed Aug 02, 2006 6:04 am Post subject: Rear Prop Gov. Questions

 	  Quote: 	
		   

 I searched the archives, but couldn't find answers to these questions.

  

 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 	


 Dan,

  My adapter & Woodward governor assembly is 8.75" total length from the gasket surface of the accessory cover. I hope this helps. I suspect that your governor will work "as is". If an issue surfaces after the conversion, the unit can be modified by any competent prop shop.

 Charlie Kuss

Hopperdhh(at)aol.com
Guest

Posted: Wed Aug 02, 2006 6:21 am Post subject: Rear Prop Gov. Questions

Charlie,

  

 What plane and engine do you have?

  

 do not archive

  

 Dan

  

  

 In a message dated 8/2/2006 10:06:31 A.M. Eastern Daylight Time,0 chaztuna(at)adelphia.net writes:

 

    	  Quote: 	
		  

I searched the0     archives, but couldn't find answers to these questions.

 

I am0     thinking of putting an IO-360-A1A engine in my RV-7A.  It has been0     flying with an IO-360-A1D6 which has a front mounted0     governor.

 

Could someone on the list please tell me0     approximately what the thickness of the rear mounted prop governor adapter0     pad is on an IO-360-A1A?  I have an old one that measures about 2 1/160     inches.  Is there a thinner one available?  The dimension I need0     is from the accessory case to the prop governor itself.

 

Also,0     will the McCauley governor off the left front of my IO-360-A1D6 work on0the0     rear of the -A1A?  As far as I can tell there is about 3 percent0     difference in the drive ratio -- 0.866 vs 0.895.  I would assume that0     the governor could be adjusted for this difference.  Is there some0     other reason why it won't work?

 

Thanks,

Dan0     Hopper

RV-7A 	


Dan,

 My adapter & Woodward0   governor assembly is 8.75" total length from the gasket surface of the0   accessory cover. I hope this helps. I suspect that your governor will work "as0   is". If an issue surfaces after the conversion, the unit can be modified by0   any competent prop shop.

Charlie Kuss

[/quote]

chaztuna(at)adelphia.net
Guest

Posted: Wed Aug 02, 2006 6:49 am Post subject: Rear Prop Gov. Questions

Dan

  I'm building an 8A. I'm using a parallel valve 360.  The governor is out of an old Apache, but has been converted for use with my current setup.

 Charlie



  	  Quote: 	
		   

  Charlie,

  

 What plane and engine do you have?

  

 do not archive

  

 Dan

  

  

 In a message dated 8/2/2006 10:06:31 A.M. Eastern Daylight Time, chaztuna(at)adelphia.net writes:

  

  	  Quote: 	
		  

  I searched the archives, but couldn't find answers to these questions.

   

  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 	


  Dan,

   My adapter & Woodward governor assembly is 8.75" total length from the gasket surface of the accessory cover. I hope this helps. I suspect that your governor will work "as is". If an issue surfaces after the conversion, the unit can be modified by any competent prop shop.

  Charlie Kuss

Hopperdhh(at)aol.com
Guest

Posted: Wed Aug 02, 2006 1:48 pm Post subject: Rear Prop Gov. Questions

Thanks Charlie and others for the info.

  

 Here are a few more questions I have:

  

 As far as I can tell from my measurements with the engine not assembled0 yet, it looks like the end of the governor will come back about even with the0 firewall.  Does anyone else with a -7A know if this is OK?  In other0 words, it is OK for the governor to extend into the recess a little?  Will0 it clear the sides of the recess enough to allow for engine movement?

  

 Also, would someone please explain the metal plate that sometimes gets0 thrown away with the gasket.  I need to come up with one of these, I0 guess.  Exactly where does it go, and what purpose does it serve?

  

 Dan Hopper

 RV-7A

  

  

 In a message dated 8/2/2006 10:53:21 A.M. Eastern Daylight Time,0 chaztuna(at)adelphia.net writes:

 Dan

 I'm building an 8A. I'm using a parallel valve 360. 0   The governor is out of an old Apache, but has been converted for use with0my0   current setup.

Charlie



    	  Quote: 	
		  

 Charlie,

 

What plane and engine do you0     have?

 

do not0   archive

 

Dan

 

	
[/quote]

aerobubba(at)earthlink.ne
Guest

Posted: Thu Aug 03, 2006 3:41 am Post subject: Rear Prop Gov. Questions

Hi Dan-



 	  Quote: 	
		  Also, would someone please explain the metal plate that sometimes gets 

thrown away with the gasket. I need to come up with one of these, I guess. 

Exactly where does it go, and what purpose does it serve?

 
	


 The metal plate goes between two gaskets, and the trio is then placed

between the gov and the case.  It seems that there is an oil passage that

is too close to the edge of the mating surfaces, and without the plate the

gasket material can blow out and port all you oil overboard.  IIRC, there

is at least one such scenario in the archives.  And, yes, it's quite easy

to chuck the plate with the gaskets.  You may wonder how I know that...



glen matejcek

aerobubba(at)earthlink.net

recapen(at)earthlink.net
Guest

Posted: Thu Aug 03, 2006 3:59 am Post subject: Rear Prop Gov. Questions

My jihostroj governor doesn't even come close to the recess.....

  

 If my engine vibrates enough for it to touch - even once - I got significantly larger problems.......



 [quote]--

recapen(at)earthlink.net
Guest

Posted: Thu Aug 03, 2006 4:17 am Post subject: Rear Prop Gov. Questions

I don't recall getting a 'plate' with my Jihostroj governor.



Details please!  How thick, what shape, what material, specific to governor brand, where in what manual is it referred to, anyone got pictures.....?



Ralph Capen



--

chaztuna(at)adelphia.net
Guest

Posted: Thu Aug 03, 2006 4:54 am Post subject: Rear Prop Gov. Questions

 	  Quote: 	
		  --> RV-List message posted by: "glen matejcek" <aerobubba(at)earthlink.net>



  Hi Dan-



 >Also, would someone please explain the metal plate that sometimes gets 

 >thrown away with the gasket. I need to come up with one of these, I guess. 

 >Exactly where does it go, and what purpose does it serve?

  

  The metal plate goes between two gaskets, and the trio is then placed

 between the gov and the case. 	


 Glen,

  You have me confused by the use of the word "case" above. I was under the impression that these items were located between the governor and the adapter. Am I wrong? Do they go between the adapter and the accessory case?

 Charlie Kuss



  	  Quote: 	
		   It seems that there is an oil passage that

 is too close to the edge of the mating surfaces, and without the plate the

 gasket material can blow out and port all you oil overboard.  IIRC, there

 is at least one such scenario in the archives.  And, yes, it's quite easy

 to chuck the plate with the gaskets.  You may wonder how I know that...



 glen matejcek

 aerobubba(at)earthlink.net



 



 



 



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Hopperdhh(at)aol.com
Guest

Posted: Thu Aug 03, 2006 8:33 am Post subject: Rear Prop Gov. Questions

Glen,

  

 I too need some clarification.  I have a governor, an adaptor, and an0 accessory case.  At which joint does the metal plate go?  Apparently0 the metal plate must have a rough surface or serrations, etc., that hold the0 gaskets better.  Is this true?

  

 I'll look over the parts and see if I can tell where the oil passageway is0 that is close to the edge.

  

 Something that I had never thought about is that the prop pressure must run0 well above engine oil pressure -- perhaps 150 PSI?  That means that the0 front main bearing is being lubricated by this pressure too, since there are no0 seals between the prop feed and the 2 bearing surfaces on the front main0 bearing.

  

 Dan Hopper

 RV-7A

  

  

  

  

  

  

  

  

  

  

  

 In a message dated 8/3/2006 7:43:36 A.M. Eastern Daylight Time,0 aerobubba(at)earthlink.net writes:

 -->0   RV-List message posted by: "glen matejcek"0   <aerobubba(at)earthlink.net>



Hi Dan-



 	  Quote: 	
		  Also, would someone0   please explain the metal plate that sometimes gets 

thrown away with0   the gasket. I need to come up with one of these, I guess. 

Exactly0   where does it go, and what purpose does it serve?


	


The metal plate goes0   between two gaskets, and the trio is then placed

between the gov and the0   case.  It seems that there is an oil passage that

is too close to0the0   edge of the mating surfaces, and without the plate the

gasket material0can0   blow out and port all you oil overboard.  IIRC, there

is at least0one0   such scenario in the archives.  And, yes, it's quite easy

to chuck the0   plate with the gaskets.  You may wonder how I know that...



glen0 ==================================================es0 Day0   0                        0                       

  -->0 ==================================================              - NEW MATRONICS LIST WIKI -

_-=0 sp;0                        0 ->0 =========================p;0              - List Contribution Web Site0   0                        0 ==================================================



[/quote]

gyoung

Joined: 09 Jan 2006
Posts: 211
Location: Republic of Texas

Posted: Sat Aug 05, 2006 1:38 pm Post subject: Rear Prop Gov. Questions

I can attest to the dumping oil overboard scenario having just

experienced it on my trip to Oshkosh. The Lyc in my Navion has a similar

adapter for the prop governor with a thin plate sandwiched by two

paper-thin gaskets. One of the gaskets let go (at the high pressure

port) and it was pumping a quart out every 2 hours. It turned out to be

one of the cheapest to fix problems I've had but it was unnerving and

could have been worse. Be careful if you have that setup. Use the

manuals to be sure you get it right.



Greg Young



 	  Quote: 	
		    

  The metal plate goes between two gaskets, and the trio is 

 then placed between the gov and the case.  It seems that 

 there is an oil passage that is too close to the edge of the 

 mating surfaces, and without the plate the gasket material 

 can blow out and port all you oil overboard.  IIRC, there is 

 at least one such scenario in the archives.  And, yes, it's 

 quite easy to chuck the plate with the gaskets.  You may 

 wonder how I know that...

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