29-04 Riveting Forward Bottom Skins and Bottom Skin

By a stroke of good luck, I realised that by making a support leg and fixing it to a plank of wood, the structure would be a perfect width to fit between my bench and a beam across the workshop, offering an ideal place to clamp and fully secure everything during riveting.


Cherry Rivets

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After final-drilling #20 the holes in the lower drag fittings through the skins, CR3213-5-5 Cherry Rivets are set.

I was concerned that my Taylor Pneumatic T-7891N Blind Riveter would struggle with these larger rivets, but it coped really well and made the process very easy.


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The Cherry Rivet Process Manual details tolerances on stem flushness after setting.


Muffler Shroud Ramp

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Even though it’s only a small amount of Proseal needed to seal the rear edge of the Muffler Shroud Ramp, I used my pneumatic syringe.

This helped to force the sticky stuff into the small gap prior to riveting.


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The masking tape again helped to tame the Proseal monster!


Riveting

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The other rivets are obviously a two-man job, but pretty straightforward with generally good access.

We found the special elevator bucking bar worked well to set the rivets between the spars.


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A small number of AN426AD4’s need the bolts pushed back out of the way to gain access.The manual suggests you set these last.


I was pleased to get the Cherry Rivets set with no dramas. Onwards and upwards!

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