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Bonanza Nose Bowl replacement

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citabriapilot(at)comcast.
Guest

Posted: Sun Nov 11, 2007 7:22 am Post subject: Bonanza Nose Bowl replacement

 	  Quote: 	
		  

Anyone have any experience or information on changing the nose bowl  
	


on a J35. Any one have a J 35 nose bowl for sale.

Thanks Bob

steven.d.dortch(at)us.arm
Guest

Posted: Mon Nov 12, 2007 6:18 am Post subject: Bonanza Nose Bowl replacement

A friend of mine, restoring a B model Bonanza, split his nose bowl horizontally at the bottom of the Air inlets. He then fabricated a strong system that reattaches it. This way he could get the engine in and out easier. 

Having said that he is about the best mechanic I know. He has the engineering data worked up and has been told that approval should be no problem. It added a small amout of weight. 



Blue Skies, Steve

1948 Straight 35

San Antonio 



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BobsV35B(at)aol.com
Guest

Posted: Mon Nov 12, 2007 6:50 am Post subject: Bonanza Nose Bowl replacement

Good Morning Steve,

  

 It appears that your friend is reinventing the wheel!

  

 Beech splits the nose bowl cowl on their factory turbocharged airplanes for  the same reason. They do it about in the middle of the bug eyes. I would tend to  duplicate what Beech has done if I wanted to split mine.

  

 Happy  Skies,



Old Bob

AKA

Bob Siegfried

Ancient Aviator

Stearman  N3977A

Brookeridge Air Park LL22

Downers Grove, IL 60516

630 985-8503   

  In a message dated 11/12/2007 8:19:48 A.M. Central Standard Time,  steven.d.dortch(at)us.army.mil writes:

  	  Quote: 	
		  -->    Beech-List message posted by: "Dortch, Steven D MAJ NG NG"    <steven.d.dortch(at)us.army.mil>



A friend of mine, restoring a B    model Bonanza, split his nose bowl horizontally at the bottom of the Air    inlets. He then fabricated a strong system that reattaches it. This way he    could get the engine in and out easier. 

Having said that he is about the    best mechanic I know. He has the engineering data worked up and has been told    that approval should be no problem. It added a small amount of weight.    



Blue Skies, Steve

1948 Straight 35

San Antonio

flyv35b(at)minetfiber.com
Guest

Posted: Mon Nov 12, 2007 9:40 am Post subject: Bonanza Nose Bowl replacement

The nosebowl on my V35B has a center  section that is riveted to the remainder using doubler plates.  I think  this is probably the same on all models with the IO-520 engine.  It would  be quite easy to drill out the rivets, which would allow lifting the engine  almost straight upwards instead of the extreme tilting that is now  required.  The rivets could be replaced with nutplates and screws which  would allow for future removal of the top nosebowl piece.  This is how the  T-34 nosebowl is built if I'm not mistaken.  Of course this would require a  field approval and 337 form as this probably goes beyond what constitutes a  minor modification.  I'm really surprised that someone has not obtained a  multiple STC for this modification.

  

 Cliff Hanson   A&P/IA

 [quote]   ---

BobsV35B(at)aol.com
Guest

Posted: Mon Nov 12, 2007 11:40 am Post subject: Bonanza Nose Bowl replacement

Good Afternoon Cliff,

  

 Sounds like you have one of the old style nose bowls that were modified at  the factory to accommodate the canted engine starting with the S35. 

  

 Once they ran out of the old ones, that upper section was no longer used  and the nose bowl was once again a one piece item with the exception I mentioned  earlier. In those factory turbocharged airplanes, they split the nose bowl on  each side about half way from the top to the bottom of the air inlets. The  flange was riveted to one half and screwed to the other to provide easy removal  for engine changes.. 

  

 Once again, why reinvent the wheel? 

  

 Happy  Skies,



Old Bob

AKA

Bob Siegfried

Ancient Aviator

Stearman  N3977A

Brookeridge Air Park LL22

Downers Grove, IL 60516

630  985-8503

   

  In a message dated 11/12/2007 11:41:55 A.M. Central Standard Time,  flyv35b(at)minetfiber.com writes:

  	  Quote: 	
		     The nose bowl on my V35B has a    center section that is riveted to the remainder using doubler plates.  I    think this is probably the same on all models with the IO-520 engine.  It    would be quite easy to drill out the rivets, which would allow lifting the    engine almost straight upwards instead of the extreme tilting that is now    required.  The rivets could be replaced with nutplates and screws which    would allow for future removal of the top nosebowl piece.  This is how    the T-34 nosebowl is built if I'm not mistaken.  Of course this would    require a field approval and 337 form as this probably goes beyond what    constitutes a minor modification.  I'm really surprised that someone has    not obtained a multiple STC for this modification.

    

   Cliff Hanson     A&P/IA

	






See what's new at AOL.com and Make AOL Your Homepage.

  [quote][b]

village_pizza(at)vermonte
Guest

Posted: Mon Nov 12, 2007 1:44 pm Post subject: Bonanza Nose Bowl replacement

Old Bob, Your Mail is coming in from Matronics,

and it looks like html,

We are using beech-owners(at)beechcraft.org,

Now I am all confused!!!  ,

Kostas



BobsV35B(at)aol.com wrote:

 	  Quote: 	
		   Good Afternoon Cliff,

 Sounds like you have one of the old style nose bowls that were 

 modified at the factory to accommodate the canted engine starting with 

 the S35.

 Once they ran out of the old ones, that upper section was no longer 

 used and the nose bowl was once again a one piece item with the 

 exception I mentioned earlier. In those factory turbocharged 

 airplanes, they split the nose bowl on each side about half way from 

 the top to the bottom of the air inlets. The flange was riveted to one 

 half and screwed to the other to provide easy removal for engine 

 changes..

 Once again, why reinvent the wheel?

 Happy Skies,



 Old Bob

 AKA

 Bob Siegfried

 Ancient Aviator

 Stearman N3977A

 Brookeridge Air Park LL22

 Downers Grove, IL 60516

 630 985-8503

 In a message dated 11/12/2007 11:41:55 A.M. Central Standard Time, 

 flyv35b(at)minetfiber.com writes:



     *The nose bowl on my V35B has a center section that is riveted to

     the remainder using doubler plates. I think this is probably the

     same on all models with the IO-520 engine. It would be quite easy

     to drill out the rivets, which would allow lifting the engine

     almost straight upwards instead of the extreme tilting that is now

     required. The rivets could be replaced with nutplates and screws

     which would allow for future removal of the top nosebowl piece.

     This is how the T-34 nosebowl is built if I'm not mistaken. Of

     course this would require a field approval and 337 form as this

     probably goes beyond what constitutes a minor modification. I'm

     really surprised that someone has not obtained a multiple STC for

     this modification.*

     **

     *Cliff Hanson A&P/IA*





 ------------------------------------------------------------------------

 *

 *


	


-- 

-‘?’-FLY-‘?’-

   Kostas

 V35A N44CM

 Springfield VT.

flyv35b(at)minetfiber.com
Guest

Posted: Mon Nov 12, 2007 1:57 pm Post subject: Bonanza Nose Bowl replacement

Hi Bob,

  

 What is your opinion then of modifying  the nose bowl to use nut-plates for easy removal like the factory?   Couldn't that be a minor modification?

  

 Cliff

 [quote]   ---

BobsV35B(at)aol.com
Guest

Posted: Mon Nov 12, 2007 2:42 pm Post subject: Bonanza Nose Bowl replacement

Hi Cliff,

  

 I think I would consider doing it as a minor alteration on my own airplane,  but I am not so sure I would want to send one out of the shop that way.

  

 There are some fights I don't mind fighting and others where I would  sooner not compete!

  

 Gotta think on that one some more.

  

 Happy  Skies,



Old Bob

AKA

Bob Siegfried

Ancient Aviator

Stearman  N3977A

Brookeridge Air Park LL22

Downers Grove, IL 60516

630 985-8503   

  In a message dated 11/12/2007 3:58:17 P.M. Central Standard Time,  flyv35b(at)minetfiber.com writes:

  	  Quote: 	
		     Hi Bob,

    

   What is your opinion then of    modifying the nose bowl to use nut-plates for easy removal like the    factory?  Couldn't that be a minor modification?

    

   Cliff

	






See what's new a [quote][b]

flyv35b(at)minetfiber.com
Guest

Posted: Mon Nov 12, 2007 4:25 pm Post subject: Bonanza Nose Bowl replacement

That's pretty much the way I feel  about it.  I just thought that if the factory did that very thing on  essentially the same model plane and part (with the IO-520 engine), you could  reason (and argue if need be) that it was a minor  mod.

  

 Thanks for your  input.

  

 Cliff

 [quote]   ---

steven.d.dortch(at)us.arm
Guest

Posted: Mon Nov 12, 2007 7:55 pm Post subject: Bonanza Nose Bowl replacement

OK, OK When I called my buddy up he told me that he modeled his mod on the later model. Said it sure made it easier putting the engine in. 



I thot this list was dead. Take a little trip to the middle east and a lot of things change. Where else are Bonanza discussions going on? 



I just moved mine to Boerne Stage Airport NW of San Antonio.  Waiting on a hanger. 



Blue Skeis, 



Steve D

48 Straight 35



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