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Building Engine Mount

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zenithlist(at)yahoo.com
Guest

Posted: Mon Mar 31, 2008 6:34 pm Post subject: Building Engine Mount

I am building an engine mount for Corvair/601XL per William Wayne manual which calls for 1/2" firewall spool tubes and diagonal tubes of 3/4".  When mating the diagonal tubes to firewall spool tubes, do I "squeeze" the ends of 3/4" diagonal tubes down to 1/2" prior to welding or do I leave the 3/4" diagonal tubes as-is and somehow "fill" in the gap due to different sizes?



  ">one month of Blockbuster Total Access, No Cost.  [quote][b]

zenithlist(at)yahoo.com
Guest

Posted: Mon Mar 31, 2008 11:12 pm Post subject: Building Engine Mount

I am building the engine mount for Corvair/601XL according William Wynne manual which calls for 1/2" round tube for firewall spools and 3/4" round diagonal tubes.  Do I need to "squeeze" the ends of 3/4" diagonal tubes to 1/2" to properly mate with the firewall spools or do I leave the 3/4" as-is and somehow "fills" the gaps, due to different tube sizes, when welding?



  ">Get A Month of Blockbuster Total Access, No Cost. W00t

  ">Get A Month of Blockbuster Total Access, No Cost. W00t  [quote][b]

ashontz

Joined: 27 Dec 2006
Posts: 723

Posted: Tue Apr 01, 2008 3:28 am Post subject: Re: Building Engine Mount

I'm still waiting for my conversion manual from WW. What welding method does he recommend? I was thinking of trying to make my own engine mount as well using my oxy-acetylene torch I bought for aluminum welding. Any recommendations for good info on how to weld steel with an oxy-torch?



[quote="zenithlist(at)yahoo.com"]I am building an engine mount for Corvair/601XL per William Wayne manual which calls for 1/2" firewall spool tubes and diagonal tubes of 3/4".  When mating the diagonal tubes to firewall spool tubes, do I "squeeze" the ends of 3/4" diagonal tubes down to 1/2" prior to welding or do I leave the 3/4" diagonal tubes as-is and somehow "fill" in the gap due to different sizes?



  ">one month of Blockbuster Total Access, No Cost.   	  Quote: 	
		  [b]

larry(at)macsmachine.com
Guest

Posted: Tue Apr 01, 2008 6:35 am Post subject: Building Engine Mount

John,

It's better to squeeze the tube edges to maximize the strength of the 

weld.  Always try to minimize gaps as they do interfere with joint 

integrity.



Larry McFarland 601HDS at www.macsmachine.com



John Smith wrote:

 	  Quote: 	
		   I am building the engine mount for Corvair/601XL according William 

 Wynne manual which calls for 1/2" round tube for firewall spools and 

 3/4" round diagonal tubes.  Do I need to "squeeze" the ends of 3/4" 

 diagonal tubes to 1/2" to properly mate with the firewall spools or do 

 I leave the 3/4" as-is and somehow "fills" the gaps, due to different 

 tube sizes, when welding?

 *

 *

larry(at)macsmachine.com
Guest

Posted: Tue Apr 01, 2008 6:49 am Post subject: Building Engine Mount

Hi Andy,

The optimum process would be TIG.  Oxyacetylene is a close second as you 

have good control of the heat involved.  Should be easier by far to do 

the mount with the

gas process.  I used to gas weld aluminum tanks, but couldn't get 

comfortable flying a gas welded tank.   You'll learn more by reading a 

little and practicing with sample

tube pieces first.  I always make weld joint samples before the fact to 

"tune up" the process in my head.  Close those gaps before welding.



Larry McFarland 601HDS at www.macsmachine.com

ashontz wrote:

 	  Quote: 	
		   



 I'm still waiting for my conversion manual from WW. What welding method does he recommend? I was thinking of trying to make my own engine mount as well using my oxy-acetylene torch I bought for aluminum welding. Any recommendations for good info on how to weld steel with an oxy-torch?



 --------

 Andy Shontz

 CH601XL - Corvair

 www.mykitlog.com/ashontz

ashontz

Joined: 27 Dec 2006
Posts: 723

Posted: Tue Apr 01, 2008 8:03 am Post subject: Re: Building Engine Mount

Thanks Larry. What kind of filler is used when welding steel like for an engine mount. Currently I'm only familiar with MIG and stick arc welding steel as well as what I've done gas welding aluminum. I still have to learn myself some steel gas welding.



 	  larry(at)macsmachine.com wrote: 	
		  Hi Andy,

The optimum process would be TIG.  Oxyacetylene is a close second as you 

have good control of the heat involved.  Should be easier by far to do 

the mount with the

gas process.  I used to gas weld aluminum tanks, but couldn't get 

comfortable flying a gas welded tank.   You'll learn more by reading a 

little and practicing with sample

tube pieces first.  I always make weld joint samples before the fact to 

"tune up" the process in my head.  Close those gaps before welding.



Larry McFarland 601HDS at www.macsmachine.com

ashontz wrote:

 	  Quote: 	
		   



 I'm still waiting for my conversion manual from WW. What welding method does he recommend? I was thinking of trying to make my own engine mount as well using my oxy-acetylene torch I bought for aluminum welding. Any recommendations for good info on how to weld steel with an oxy-torch?



 --------

 Andy Shontz

 CH601XL - Corvair

 www.mykitlog.com/ashontz

John Bolding

Joined: 23 May 2006
Posts: 281

Posted: Tue Apr 01, 2008 1:55 pm Post subject: Building Engine Mount

Kent White, who can weld cast iron to a loaf of bread without burning 

either, uses RG45  on 4130,  all ( well, nearly all)the Bearhawk guys use it 

as well.  A good read on gas welding is under Budd Davisons'  website 

www.airbum.com,  find the link to "Zen and the Weld Puddle" (or close) , 20% 

is UNDERSTANDING the basics, the other 99% is practice.

John



---

larry(at)macsmachine.com
Guest

Posted: Tue Apr 01, 2008 3:22 pm Post subject: Building Engine Mount

Andy,

I use an ER70-2 copper coated rod for 4130 aircraft steel.  3/32 and 

1/16th inch sizes.



Larry McFarland



ashontz wrote:

 	  Quote: 	
		   



 Thanks Larry. What kind of filler is used when welding steel like for an engine mount. Currently I'm only familiar with MIG and stick arc welding steel as well as what I've done gas welding aluminum. I still have to learn myself some steel gas welding.

ashontz

Joined: 27 Dec 2006
Posts: 723

Posted: Tue Apr 01, 2008 3:45 pm Post subject: Re: Building Engine Mount

Thanks to both of you. I'll have to try it out.



I have Kent White's video etc... on gas welding aluminum. Very informative. It's actually relaxing to watch too. he's like listening to a hyponotist or something.

zenithlist(at)yahoo.com
Guest

Posted: Tue Apr 01, 2008 7:12 pm Post subject: Building Engine Mount

">one month of Blockbuster Total Access, No Cost. [quote][b]

zenithlist(at)yahoo.com
Guest

Posted: Tue Apr 01, 2008 7:25 pm Post subject: Building Engine Mount

I think squeezing the tube ends would be better as well.  

  Is heating up the tube ends and give them a good wack with a hammer a good way to squeeze them?  What do people use to cut the notches at the end of diagonal tubes to mate with firewall spools.

  



LarryMcFarland <larry(at)macsmachine.com> wrote:

  [quote]--> Zenith-List message posted by: LarryMcFarland 



John,

It's better to squeeze the tube edges to maximize the strength of the 

weld. Always try to minimize gaps as they do interfere with joint 

integrity.



Larry McFarland 601HDS at www.macsmachine.com



John Smith wrote:

[quote] I am building the engine mount for Corvair/601XL according William 

 Wynne manual which calls for 1/2" round tube for firewall spools and 

 3/4" round diagonal tubes.  ">one month of Blockbuster Total Access, No Cost.  [quote][b]

larry(at)macsmachine.com
Guest

Posted: Wed Apr 02, 2008 7:12 am Post subject: Building Engine Mount

John,

You only have to place the tube on a hard surface and tap with a ball 

peen hammer.  I'd not recommend you heat beforehand and hammer because 

you may start a crack.

Getting the profile fit for the spools is usually done on a grinding 

wheel.  A Dremel disk would work, but slower.



Larry McFarland 601HDS at www.macsmachine.com



John Smith wrote:

 	  Quote: 	
		   I think squeezing the tube ends would be better as well. 

 Is heating up the tube ends and give them a good wack with a hammer a 

 good way to squeeze them?  What do people use to cut the notches at 

 the end of diagonal tubes to mate with firewall spools.

 */LarryMcFarland <larry(at)macsmachine.com>/* wrote:

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