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Rob's REBVAIR Project
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Date: 1-12-2014
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Number of Hours: 4.00
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Manual Reference:
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Brief Description: Avionics cage: part 2
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Here are some photos that highlight my aproach to the panel. Like many others, I am cutting some fairly big holes in the original 0.032" panel mterial. In fact, there will be very little of the original metal left when I'm done. And like others, I plan on installing 0.060" cover plates with nutplates over these holes once the instruments are installed, to help replace some of the lost rigidity.
On the right of image 1 you can see the vertical reinforcement angles that I've installed behind the panel with flush rivets. These will ultimately hold the nutplates to which all 0.060" cover plates will be attached. I have placed these in strategic locations based on my placement of the instruments.
Image 3 shows an important limitation I (and I'm sure others) had to account for, but no one ever talks about: you can't have the radio stack start from the very bottom of the instrument panel because the instrument panel-firewall strut occupies the first half-inch of space. The radios are almost a foot long, and if you installed them at the very bottom of the panel (to try and maximize the already non-existent available panel space), the radio tray would run into that strut. So the avionics cage must start no less than a half-inch from the bottom. The good news is that, once bolted into the panel, the avionics cage is only a fraction of an inch above that strut, and it only takes a few shims to have it help support the cage.
I plan on installing a GTN650 tray (and wiring) above the SL-30...it's a relatively a small investment toward simplifying the addition of this instrument later on. I can always use it as a $150 glove box!
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view of rear of instrument panel
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veritcal reinforcing stringer
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clearance for the panel strut
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