I have a Jack & Heintz R1 400 amp aircraft generator. I'm going to the
Delta steamboat meet near Rio Vista Ca. this weekend and plan to take
the generator along to sell it as there are many do-it-yourself people
The two main reasons that someone would buy this generator are to
build a welder or as a motor for an electric vehicle.
I have found several websites with directions and schematics for
building welders but have not been able to locate much info on using
this type of generator as a motor.
Does anyone know of a source of this knowlege that I can print out and
show to prospective buyers?
Not to argue, but a 400 AMP generator is pretty large. Are you sure
that this is not a 400 CYCLE generator. 400 HZ stuff is, or at least
was, quite common on aircraft.
Can't help with making it "motor", but will say that if it gets used
that way, it will not be optimum.
Take care. Have a good trip on the Queen, and please post pix when
you get back.
Don't know where you will find the printed info., but I ran a 1975
Fiat 128L coupe on a 400 amp aircraft Generator years ago. I used a
simple dual voltage control (24/48 and field weakening for speed
Nope. He is referring to the various surplus DC generators running
around 400rpm and rated at 200, 300, or 400 amps. Very compact package,
around 7" in diameter, 14" long for the 300 amp version. Lots of info on
the web "aircraft generator welder" gets a bunch of good hits.
had them in their catalog as recently as last
year, don't see anything on them now.
Brian, those 300 and 400 AMP DC generators were very common military
surpluss for many years, and they made EXCELLENT electric motors. Some
airplanes even used "starterators" - starter generator cominations.
My 400 amp generator that I used in the Fiat put out about 20 HP on 48
volts without field weakening, and about 80 for short periods with
field at about 15%. I limitted my weakening to about 30%, +/-. It
would get the heavy little fiat up to 50mph with the 400 amp breaker,
which prevented me from getting more than about25 or mabee 30 HP out
of it before tripping.
I converted a totally rusted-out VW beetle about 25 years ago to
electric power. I got a Kaylor adaptor that holds the old
flywheel and clutch assembly and mates to the VW transaxle.
It has the 16-tooth spline to take standard jet engine starters
or starter/generators. I got a GE starter/generator. it was
rated at 400 A 28 V continuous as a generator, or 1300 A 30 V
for one minute as a starter. I don't think I ever got it up to
400A, as my trolling motor batteries didn't have terminals that
could handle that. I did cruise around the neighborhood with
it, and it worked. I had 4 90 A 12 V batteries in it, and built
a field controller that was hooked to the "gas" pedal. The only
down side to it was that particular motor was very noisy,
especially with about 30 V on the field. Without an armature
controller, the motor idled at about 3000 RPM. It would cruise
at about 30 MPH on the level at 125 A or so, and 250 would get
it ZIPPING up a steep hill. I intended to convert it to a
hybrid with a motorcycle engine, but never finished the project.
(No way could it be licensed, the body was hanging in pieces.)
Your motor doesn't have the series field connection that a
starter/generator would have, so it probably has to be run in
the shunt mode. You need to connect the field to 28 V first,
and then connect the armature to whatever power source will run it.
Hey Leo and Clare and RoyJ,
Wow!! Sounds impressive!! I stand corrected. Sorry.
One thing that should be emphasized if Leo uses one as a motor is the
need for some sort of a minimum field current protection or fixed
shunt so it can't get a runaway.
Take care. Good luck, and Leo, please post pix if you do get it