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I'm big on "the diet" as well. Over the years my plane had a few different radios, ADF's and whatnot installed in it.
Its pretty common for shops to run new wiring and just cap the old stuff, rather than spend the time to remove the old wiring. I've done half of my insti panel, gutted as much of the old stuff as possible. Removed old ADF systems, DME and other stuff that can be replaced with modern gear, and literally a box full of wiring.
My (calculated) change was about 21 lbs.
If you really wanted to save weight, the obvious solution would be to ditch the vacuum system, and go to a DC and/or Glass install. Then 3 bladed props. Then... then... then...
There is no problem that cannot be solved with the correct application of money.
Leighton
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