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Build chronology milestones
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Chronology |
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April | June |
| May 2007 |
19th: Finally, got some time to work on the bellcranks.
Here's the left assembly clecoed to some scrap clamped in the
vice for final reaming to press-fit the bronze bushings.
Adjustable reamers are OK, but not fool-proof. The holes got
a bit hex-shaped, but managed to round them out for final
smoothing.
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19th: The poor man's arbor press: a 15mm socket and the
bracket and bushing in the bench vice for the press fit part.
A word of caution: go slow reaming out the inside of the
bearing for the 5/16" steel sleeve, so as not to put too much
torque on the bronze-aluminum joint. |
Still later on the 19th, test assembled the bellcranks:
The right one, on the bottom, went together smoothly. The
AN3-6A bolts called out on the plans for the brackets seemed
too short, so I went up to AN3-7A with one AN960 washer. The
left one needed shims, used regular printer paper. Clecoed up
the left number 9 rib. This one gets the 4th rivet hole in
the clips cut off, as they are on the flange side of the rib
and stick out past the vertical stiffeners. I used my
adjustable square to line up the clips with the rib face, but
won't drill out to #30 until the wing skins are fitted, for
final adjustments flush with the skin. | 
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