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Task: Canopy Roll Bar
This entry is composed of two work sessions. We first clamped
a large piece of angle to the bottom of the plywood. I measured
and marked the exact width and height of the rollbar. Using
1" wide oak, we cut blocks to use as end stops for the
roll bar assembly to ensure dimension.
the roll bar was clamped down to the correction dimension
and the inboard and bottom edges were sanded to the correct
angles, we cut the plywood around the roll bar leaving about
a 1/4" edge.
Next we measured the center of the F-631E splice plate and
drilled it into position.
Here we've opened most of the holes up to #30.
Next we marked a 1/4" line down from the top edge of
the channel as our horizontal reference.
We then marked in 1/4" from the center joint and in 2
1/32" up from the inside edge. We put a piece of masking
tape down, marked the two end hole locations and then removed
the tape. Laying the tape down flap on a piece of metal allowed
us to measure the length between the two marks and divide
that length by 19 (spaces between rivets). That gave us 20
rivet holes. We placed the tape back on the rear channel and
marked the vertical line. Then we used a centerpunch to mark
the position of each hole and drilled #40.
We repeated the above steps for the top of the channel as
well. Then we layed the F-631-B lower strap on the roll bar
and clamped it down at the center point. Using small c-clamps,
we progressively drilled each hole using the channel as a
Here is the final product! It looks great! next we will drill
the F-631 upper strap in place and then open all holes to