[ARC5] A pair of questions
Craig
cvcantwell at verizon.net
Tue Nov 14 10:44:19 EST 2017
Hey guys, I'm basing my load information off what I can find in the
various manuals that I have, and giving myself some padding. The SCR-274
book shows something around 15 amps for the configuration my airplane
had. When you delve into the SCR-269 books, the info get really screwy.
One book lists the input power as only .5 amps @ 24VDC, but when you
look at the schematics, it has internal fuses of 20 or 35 amps for the
inverters, depending on which one gets installed, if I'm understanding
the drawings correctly. It also has another call out for either a 2 amp
or 5 amp fuse for power in the same section of the book. What else is
weird, is that the marker beacon receiver gets it's power from the -269
and it draws about .5 amps itself.
Here is a quick run down on what has to be powered:
BC-696 Transmitter
BC-458 Transmitter
BC-453 Receiver
BC-454 Receiver
BC-455 Receiver
BC-456 Modulator
RC-43 Marker Beacon
RC-36 Interphone
SCR-269 Compass system
There are a total of 5 dynamotors and 1 inverter that power all this
equipment. There are (3) DM-32's, (1) DM-33, (1) PE-86 and (1) PE-89 or
PE-109. There is one more big inverter that provides more 115/400cy and
some 26/400cy power for other things onboard, but that isn't included,
as it's a huge power hog (250 watts per phase). It's probably why each
engine run a 100 amp generator.
I probably need to dig out the microfilm and chase down the wiring
diagrams for the power panels, as they have breakers and fuses that
range from 1 amp to 100 amps, all accessible from the cockpit, and I
can't tell from what I have on the desk here, what goes with what circuit.
Craig
More information about the ARC5
mailing list