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psm(at)att.net
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Posted: Fri Aug 06, 2010 6:25 pm Post subject: No Title

Hi Steve,



I've been using one of the Harbor Freight guns with a sharpened and smoothed

chisel to cut the heads off spar rivets. I drill the head first and then use

the power chisel to remove the remaining parts of the head.  I have another

rivet gun with a pin installed to punch rivet stems out of the spars.  This

one is a more expensive aircraft riveter with a 3x or 4x designation - a

much more powerful gun than the Harbor Freight one with a higher quality

trigger.



I opted for bolts (mostly AN4s) to hold the new spar parts together rather

than the large solid bucked rivets.  I felt more confident in my skills to

employ standard aircraft bolts and nuts rather than learning how to buck

rivets on those huge ones that are extremely critical to the safety of the

plane.



Perhaps two years ago I would have worried about the impact a pound or two

of bolts might have on the cruise speed of my plane.  Today I am more

concerned about having a safe plane than the last knot or two of speed.



Paul

XL installing upgrade

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