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BB and Angier,
The amp load is somewhat normal (around 40 amps just for the
pump) during pump operation. But, it is not recommended that the pump
power come off the main bus, rather it should have its own wiring from
the Master Relay through the 50/60 A breaker, thence to the intermittent
contactors and ultimately to the pump. Its ground should be more
direct too as other than the starter, this is the highest draw on power.
Consider taking off at night with all the lights on (non-LED),
pump in operation lifting the gear, transponder making a reply, you are holding
the flap switch up and using your last remaining digit to key the mike for
departure contact. What do you think the load is? heh? heh?
If I had that all on the main bus it would burn...........
Grayhawk
In a message dated 4/26/2013 3:10:30 P.M. Central Daylight Time,
bbradburry@bellsouth.net writes:
Is that
an electric prop? Why are the amps maxed out?
B2
-----Original
Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On
Behalf Of
Greenbacks, UnLtd.
Sent: Friday, April 26, 2013 3:10 PM
To:
Lancair Mailing List
Subject: [LML] Re: Prop overspeed???
Today's
2hr flight was normal in all respects with the single exception
that
immediately after liftoff, the MVP-50 began screaming 'check RPM'. The
RPM
display was close to 4000 and fuel flow spiked.
Nevertheless engine
sounds remained normal. Sure got my attention.
At 6:29:28 and just as the
gear started to come up is when the RPM
indication spiked for all of
about
5 seconds. Haven't seen this before.
What would the common,
everyday prop overspeed sound like?? not that I ever
want to hear
it....
Angier Ames
N4ZQ
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