[TowerTalk] Prop Pitch Motor
TexasRF at aol.com
TexasRF at aol.com
Sun Mar 14 20:19:49 PDT 2010
Gene, the current draw at startup is a bunch higher than the running
current. Sorry, don't know how much higher.
You are probably ok with the 3 #12 wires but you might want to test it on
the ground before a final commitment.
As long as the motor starts, you will be in good shape and the extra
voltage drop will only help slow down the start up.
The prop pitch motors were designed for 28VDC so that is probably a good
voltage to use. The speed will be proportional to the voltage so lower than
28 volts will slow them down a bit. They are already a tad on the slow side
so use your own judgement.
73,
Gerald K5GW
In a message dated 3/14/2010 9:58:38 P.M. Central Daylight Time,
w2lu at rochester.rr.com writes:
What is the maximum DC voltage used successfully/recommended for one of
the "small" PPM's ? What speed was accomplished and how was the brush life
at that voltage ?
I 'm building a power supply to put at the base of the tower and can
change the voltage from about 30 to 48 volts in 6 volt steps. Cable to PPM will
be 100 feet of 3-#12's. I'm figuring about 0.5 ohms and about a ten amp
demand i.e. a 5 volt drop.
Any suggestions will be greatly appreciated.
Thanks,
Gene / W2LU
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