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Jims RV-8
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Date:  1-14-2014
Number of Hours:  3.00
Manual Reference:  7-9
Brief Description:  Right Wing skin rivets!

Skyking Bob was back in town for a few days so it’s a perfect time to do some skin riveting which take 2 people. We had planned to get together last night, but I was still feeling the effects of a cold, so we postponed until tonight. With the top skins you have the option of either back-riveting or using the normal drive-buck method. Since back-riveting usually gives a nicer finish on the skin, we both decided that was the preferred method.

Previous back-riveting has been done with a plate sitting on top of the workbench with the flush rivet facing up. The rivet gun is placed on top, and the manufactured head is driven down against the plate to form a nice flush rivet/skin connection. Unfortunately, due to the size of the wing, laying it down - there is no solid plate to back rivet against, but rather, Bob has to hold a large, 3 lb. bucking bar (that looks like a “cancel stamp”) against the wing skin, while I am on the other side driving the rivet with the back-rivet set. It worked out really well once we got into a rhythm… Bob would put a rivet in the hole, I would see it come thru, he would give the “READY” call, once he was on the rivet with the bucking bar – which was my cue that it was safe to drive the rivet. I would then drive the rivet and check it with the gauge. If it was good, I called out “GOOD” and that was Bob’s cue that it was safe for him to move the bucking bar off the current rivet onto the next rivet. Sometimes I would give the under-driven rivet another short burst – but invariably, then it becomes an over-driven rivet. We took right at 3 hours, including breaks for me to cook some chicken on the grill, and we got almost all of the top skins done on the right wing – and we only had 3 bad rivets. There is a row of rivets that we will have to drive the old fashioned way as the wing stand structure is in the way. And of course, the bottom spanwise rivets can be done with the squeezer – and that’s a one man job. A good night building!
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