REFLECTOR: Bus, Battery & Back Order
Terrence Miles
terrence_miles at hotmail.com
Wed Jun 15 14:27:26 CDT 2005
Hi to everyone but in particular to Brian, Keith, Al G, and Kurt who I think
are deep into wire issues.
Here's what I got.
For Electrics: Here's my current plan and why. Two big batts in the nose.
One stacked on top of the other. For now I am going to slap the ground
leads together and run them in parallel with B&C L60 alternator (60 amps)
and the B&C external voltage regulator and the o'volt protection.
I may one day with not a lot of effort, put in a 2nd aux battery contactor,
but I see its practical value as limited due to what follows next.
I have decided in favor of a single power bus. I can't see a strong enuf
reason to break things into separate buses to power up or shed in event of
alternator problems. I will instead pull out a checklist and do a load shed
procedure at each components control head/ panel switch/CB/whatever. (Two
mags, by the way until I have her in the air and de-bugged)
When I re-read the Nuckols stuff on dual batt & single alt, I decided it
wasn't for guys like me. I can put two equal amphr batts right side by
side...read no #2awg wires running all over hell. I don't have dual EI's.
Sure as sh--t the day I loss a alternator would be the day the #1 comm would
be TU and I have to repower the main load buss to access #2 comm and get
myself confused say 2 years down the road by which time all the electron
theory will be faded into dim memory.
GRT stuff: Single AHRS system, 2 screens, EIS in the radio stack, no
airspeed&Alt add-on to the EIS in favor of round dials below the GRT
screeens. Decided basically to abandon the two spare power leads. I am
told a solenoid controlled contact can draw an amp to 1.5 amps just to hold
closed, and the diodes will cost you a volt in pressure.
Some of the above was driven by electrical abnormal checklist drafting.
Some from the local tower operator/Cozy guy/ex USAF avionics tech. For
backup, his personal philos is a bag of external hand helds.
What do you four think of this? Anybody else want to chime in?
I called Affordable panels this week. He is an RV vendor...uses the
Approach Hub stuff. He is very backed up. I am looking to make the major
buy with Stein Air. Anybody have any comments on him?
Where's everybody else on this topic. Are you guys going to wire up your
own intercomponents in the avionics rack?
Last but not least...anybody else waiting for engine mounts and exhaust
systems besides me??
Regards,
Terry
Regards,
Terry
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