*This message was transferred with a trial version of CommuniGate(tm) Pro*
I got a chance to clean off some of the dirt and grease this evening. I found a couple more data
plates. It is a 120 volt, 60 Hz, 2 phase model with a 5 kW output rating. The engine is a military
standard model with something like 52 CI's with I think a 2.5 inch bore and 3 inch stroke. The
engine is water cooled by a condenser type set-up. There is no water pump. The distributor is a
magneto type that doesn't need an external power source to provide spark and is made by Fairbanks
Morse. The starter is an Autolite unit. There is a small box mounted next to were the battery goes
that had several small parts in it. One item I found in it was a 4 inch cable with battery clamps on
both ends so it looks like the generator is made to use two small batteries side by side. Possibly
12 volt M38A1 batteries. The generator unit is longer then it is round. There is one box with two
regular 120 volt outlets and one large round connector with two sockets, one red and the other
white, that reminds me of a two pin 28 volt slave cable connector on M series vehicles but larger.
Thanks,
Bryan R.
'53 GMC XM220 2.5 Ton Shop Van
'63 M43 Ambulance
MVPA member #20324
jonathon wrote:
>
> I just talked to a guy I know that has a similar sounding generator unit,
> the part about the pulley on the end of the main generator is what got me
> thinking about this. This unit is called a PU-21 made in 1945 and is
> powered by a Hercules ZXB (should be similar to a ZXA other than bore
> diameter if I remember correctly). The main generator unit is larger in
> diameter than it is long. It's a 400Hz machine with a rotating permanent
> magnet field and puts out 4kW 120V 3Phs. The pulley on the end drives a
> small DC generator which is rated at 28VDC 0.75kW. Obviously this is an
> aircraft ground power unit. Could it be that you have a newer version of
> basically the same thing??????
>
> je
This archive was generated by hypermail 2b29 : Thu Jun 01 2000 - 22:37:12 PDT