latest screwup

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tmbg
Class C
Posts: 613
Joined: Wed Feb 07, 2007 11:05 am
Location: Atlanta, GA (4A7)

latest screwup

Post by tmbg »

It's been awfully quiet in here lately... you guys aren't making enough mistakes!

anyway, I was drilling the rear spar doublers to the rear spar, and on the left one I managed to accidentally put it together with the doublers on the forward side, and I caught it when a couple holes were unusually hard to drill. I now have an extra hole in the rear spar and one hole that's been figure-8'd. Once I assembled it correctly, I drilled the extra hole through the doublers, and I intend to fill it with a rivet. I have 3/8" on centers between the holes.

For the figure-8'd hole, I made a scrap of 0.032" that I'll use against the spar to give the shop head more meat to grip. Is this acceptable?

Here's a pic. Click here for the big version.
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Ian
RV-7 SB, chugging toward final assembly
IO-360-C1C 200hp obtained.
Hartzell BA prop received.
James Cowl ordered.
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Spike
Chief Rivet Banger
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Post by Spike »

Im not sure about your fix for the figure 8 hole. Those rivets are used in sheer, not tension. When the rivet expands in the hole it probably wont work well. You might want to call Van's on this one.
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tmbg
Class C
Posts: 613
Joined: Wed Feb 07, 2007 11:05 am
Location: Atlanta, GA (4A7)

Post by tmbg »

I'll call them now. I imagine they're going to tell me to back it up with another rivet, and I can do that.
Ian
RV-7 SB, chugging toward final assembly
IO-360-C1C 200hp obtained.
Hartzell BA prop received.
James Cowl ordered.
N773WW reserved!

tmbg
Class C
Posts: 613
Joined: Wed Feb 07, 2007 11:05 am
Location: Atlanta, GA (4A7)

Post by tmbg »

they said that it's not a big deal if the problem with the hole is just in the spar web and not in the doubler material. He said if it makes me feel better I can use the bit of doubler material to support the rivet head, but to use 0.040" for the doubler.
Ian
RV-7 SB, chugging toward final assembly
IO-360-C1C 200hp obtained.
Hartzell BA prop received.
James Cowl ordered.
N773WW reserved!

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