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  #11  
Old 01-30-2018, 09:47 AM
asw20c asw20c is offline
 
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It appears the rotisserie manufacturer that Larry suggested is not in business any longer. At least the web link seems to be dead.
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  #12  
Old 01-30-2018, 10:18 AM
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Sam Buchanan Sam Buchanan is offline
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Quote:
Originally Posted by asw20c View Post
If you only attach an engine stand at one end, presumably at the firewall, and simply let the aft end rotate on an adjustable height table or saw horse, then I would agree with you that there isn't much thought that needs to go into how to align the rotation axis.
Very true.

Different airplane but same use of the engine stand/sawhorse:



The Legal Eagle was a fun build.
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Last edited by Sam Buchanan : 01-30-2018 at 06:17 PM.
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  #13  
Old 01-30-2018, 01:48 PM
TASEsq TASEsq is offline
 
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Anyone got an older thresher laying about?

https://youtu.be/WPz3-BIc-c8

All 4 videos are pretty interesting watching the development of his idea.
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  #14  
Old 01-30-2018, 02:52 PM
mturnerb mturnerb is online now
 
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Quote:
Originally Posted by Jared_Solomon View Post
I lined up the bottom of the engine stand plate with the bottom of the firewall. So the access of rotation would mimic rolling the fuselage on flat table. I then laid the aft end of the fuselage on an adjustable height sawhorse I bought from Lowe's. Whenever I rotated the fuselage the aft end would just roll a few inches on the sawhorse.

You can see the sawhorse at the aft end of the fuselage in the pic below

How did you fabricate the angles attaching the firewall to the engine stand?
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  #15  
Old 01-30-2018, 11:16 PM
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nzrv8 nzrv8 is offline
 
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Quote:
Originally Posted by asw20c View Post
Really? Seems to me if you rigidly attach an engine stand with a single degree of freedom (roll) at both ends of the aircraft and the axis of rotation does not accurately align and go through both, then you run the risk of tweaking/bending the fuselage. If you only attach an engine stand at one end, presumably at the firewall, and simply let the aft end rotate on an adjustable height table or saw horse, then I would agree with you that there isn't much thought that needs to go into how to align the rotation axis.
Although now that I think about it some more, you can have a single degree of freedom on one end, but you will need 3 degrees of freedom on the aft end, hence the offset attachment from the OP's photos.
Regarding the rigidity, I found that there was more than enough 'slop' in the shaft of the rotating head that allowed the fuselage to move up and down as required during rotation. The slop in the engine stand equated for about 6 inches of up and down free movement at the rear of the fuselage, which was more than enough to allow the fuselage to rotate unhindered.
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