bending a wing spar

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Feb 16, 2015
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17
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south africa
I am building a 750 cruzer. The main wing spar is too long for my press brake and I would like some input as I would like to stagger bend it(the spar) . By this I mean bend say 15 degrees ,then move the piece up and bend the remainder , increase the bend angle and repeat the process till the whole spar is bent. Comments please, thanks
 

TFF

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Apr 28, 2010
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16,180
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Memphis, TN
You might be able to do it in 5 degree increments. You defiantly don't want to have a point identifiable as the stop start point in the bend.
 

proppastie

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Feb 19, 2012
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5,454
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NJ
It's not rocket science- clamp and then bend over the edge of a table with a mallet a little at a time. Nothing says it has to be brake formed.
better practice on some scrap....hardened material is not easy to keep straight. if you practice with soft steel it is not the same......you might decide to get it properly bent in a brake....but careful.... most heating air conditioning guys do not know the meaning of the term "bend radius" and you could end up with expensive scrap their machines are usually set up for sharp bends on soft steel.....a "no no"
 
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