As mentioned in the previous post, it was discovered that the shaft for the adjustment knob on the backup altimeter is positioned such that a slot needed to be crafted to allow the instrument to be nested in the instrument panel. Looking closely at the photo below one can see how the shaft for the adjustment knob touches the flange on the instrument that would normally be inserted into the 2 1/4" hole in the panel … thus requiring the need to cut a slot for the shaft to protrude through the panel.
One can see the shaft for the adjustment knob
on the UMA altimeter touches the flange on the instrument. This necessitates creating a slot in the instrument
panel for the shaft to protrude through.
To create the slot, a Dremel outfitted with a
cutting wheel was used to begin the slot. This was followed by abundant use of small jewelers
files to slowly shape the slot until the altimeter seated nicely in the panel.
Backup altimeter sitting in its soon to be permanent
home. The hand filed slot was made just slightly bigger than the instrument’s shaft.
Now having a functional mounting cutout for the
altimeter, the right instrument panel was temporarily installed so the altimeter
could be set in place for a test fit to verify clearances in the vicinity of
the muffin fan. Fortunately, there is
enough clearance now that installing the fitting for the static air line should
no longer be an issue.
Although there is not an abundance of extra room
in the vicinity of the muffin fan, the static port (one with the red plug) on
the altimeter clears the muffin fan nicely … although, for this photo the angle of the camera
makes it appear as though there is less clearance than there actually is.
All that is left to do with the right instrument
panel section is rivet the glove box in place and send the assembly out for powder