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The part is the chin for Wayne Roger's Ascot. This is just an experiment using the buck/hammerform that we had left over from the First MSA FormFest where we built an aluminum body skin.

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Doing it the hard way (one piece) by hand. Using the annular raising technique, I begin hammering around the edge. This technique could have been used all the way to completion, but tucking was used in addition.

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Long tucks are formed just to sho the amount of shrinking necessary. To make the shrinking process easier -- few tucks should have been formed at one time. More room is needed to hammer each tuck.

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Tucks of this size can get out-of-hand if you aren't careful. One of these tucks was about to get folded over -- so I flattend it our some before proceeding.

0-03a
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Hammering the tucks in turns out to be quite a chore.

0-03b
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Although at a point it looks hopeless -- the hammered tucks begine to give way to a finished part.

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The buck/hammerform was really not hard enough to handle the heavy tuck shrinking. A solid metal ball was used to finish the shrinking.

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Close-up of the aluminum after shrinking

0-06a
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Almost finished. Still needs to be trimmed and smoothed just a little more.

0-08
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A much easier way is to make the part from two pieces. A little shaping is done with the mallet -- but the process is speeded up using tucks.

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Just a few tucks are needed.

0-10
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After tucks have ben hammered down. This would have been much smoother had it been done on the steel ball.

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This is getting the bottom piece pretty close. I'll smooth it a little more with a wheeling machine.

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With the part held in place by clamping the flat spot -- it is marked for trimming.

0-13
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A sykes Pickavant hand trimmer is used for a clean cut.

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The bottom piece trimmed. It will be tightened up in a few places, smoothed a little and welded to the upper portion.