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02-08-2014, 10:45 AM
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Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,828
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Drilling begins
As much as I hate to do this mod, I think it will make the forward spar much more attached to the fuse. The forward spar is only held on by 16 rivets by way of HS 714 and then on to the sheet metal forward spar. The mod captures HS 710 (upper angle) and more than doubles the amount of rivets grabbing the forward spar.
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7A Slider, EFII Angle 360, CS, SJ.
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02-08-2014, 02:16 PM
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Join Date: Dec 2011
Location: Meridian ID, Aspen CO, Okemos MI
Posts: 2,641
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I'm not sure what to say Bret. That is a hard one. Good luck.
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rockwoodrv9a
Williamston MI
O-320 D2A
Awaiting DAR Inspection
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02-08-2014, 04:14 PM
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Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,828
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I have successively removed the HS 404 and 405 ribs today  the hardest part was drilling from the rear towards the front to remove the rivets that hold the 404 and 405 together. I used a 12 in 40 drill, flex with a rag holding the bit perpendicular to the flange 3/4 the way through, drilled the manufactured head slightly with a 30, took a sharp wood chisel to remove the head, took a 16 nail turned down to fit in the 40 hole, taped to the rivet gun on 20 psi, taped a nut on my tungsten bucking bar for the back stop dolly and pulled the trigger ever so slightly. Clean holes! I got the procedure idea from Walt's post but had to come up with an idea to do this single handed.
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7A Slider, EFII Angle 360, CS, SJ.
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02-08-2014, 06:16 PM
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Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,828
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Quote:
Originally Posted by ILikePike
Pictures Bret?
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well, kinda getto, but it worked.
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7A Slider, EFII Angle 360, CS, SJ.
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02-08-2014, 06:26 PM
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Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,828
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So if you did the HS like me, the manifactured heads are facing rear, and HS 405 is installed so that it is dificult to drill, I had to bend the 12inch 40 drill while drilling to get a straight shot in the MH of the rivet. These are the tools I used. Kinda back yardish but it worked.
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7A Slider, EFII Angle 360, CS, SJ.
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02-08-2014, 07:16 PM
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Join Date: Dec 2005
Location: San Pedro
Posts: 1,013
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Good Man
You made the right decision and you'll never have to wonder about any 'what if's". Van's has been proactive here and I support those who choose to do the mod. Please update us as to your progress. Good Man!!!
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Building finally
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02-09-2014, 11:35 AM
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Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,828
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no holes were harmed in the making of this film...pic
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7A Slider, EFII Angle 360, CS, SJ.
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02-10-2014, 06:51 AM
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Join Date: Mar 2008
Location: Clarksboro, NJ
Posts: 827
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I have lost track of those who do and do not have cracks - are you doing this because you have cracks, or as a preventive measure ?
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02-10-2014, 07:38 AM
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Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,828
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Not flying yet, preventive measure only. I think this is a weak point in the HS. Going to beef it up with the SB. If you look at the lower angle, there are only four rivets going into each side of the HS, four more inboard but I look at it as only 4 rivets holding each side of the forward spar onto the fuse! kinda scary!
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7A Slider, EFII Angle 360, CS, SJ.
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02-10-2014, 09:18 AM
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Join Date: Jan 2010
Location: Denver, CO
Posts: 1,964
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Quote:
Originally Posted by bret
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"Picture says 1,000 words." ..and most of them are not allowed in this forum! |
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