For the Mopar and Hobart collector who must have everything.
- Thread starter Carmine
- Start date
Newport 66
Old Man with a Hat
That's pretty cool...
I wouldn't mind owning this firedome powered Sheppard....originally a diesel
I wouldn't mind owning this firedome powered Sheppard....originally a diesel
Carmine
Old Man with a Hat
lol, yup.
stubs300
Senior Member
When you mention a Hobart, this is what I think of as I used them for Years in the Air Force.
Air Force orders ground power units from Essex Electro for aircraft maintenance
Air Force orders ground power units from Essex Electro for aircraft maintenance
stubs300
Senior Member
I wasn't in aircraft maintenance so I can't answer. It's airplane stuff, I just flew on them, and would occasionally would start em up and shut them down.
"400 Hz...DC" ???
I am thinking that is probably 28 volts DC and 277 Volts AC at 400 hertz. A combo unit.
Dave
pomonamissel
Senior Member
i've got a chrysler ind flathead six hobart arc welder that was my great uncles . it still runs .
Think of a standard car alternator, which produces alternating voltage at a frequency proportional to the rpm of the alternator. Pass this alternating voltage thru some diodes and you get a DC voltage with ripple component. At slow speed the ripple is large, at high speed it's fairly low.
This big generator will run at governed speed such that the output voltage alternates at 400 cycles. Then the output is chopped to DC with a small amount of ripple. The alternator will have two voltage taps, one at 28V and the other at 277V. The max current output times the voltage for each tap when added together will be 72,000 watts. This is a big MF generator and needs to treated with great respect or it will bite your ***!!!
This big generator will run at governed speed such that the output voltage alternates at 400 cycles. Then the output is chopped to DC with a small amount of ripple. The alternator will have two voltage taps, one at 28V and the other at 277V. The max current output times the voltage for each tap when added together will be 72,000 watts. This is a big MF generator and needs to treated with great respect or it will bite your ***!!!
That is a VERY odd way of rating somethings output.
stubs300
Senior Member
All I know about those is how to start up, shut down, and how to put power onto the Jet. It's a external power cart.
Carmine
Old Man with a Hat
300Nutter
Senior Member
When I went to a small college, had to wash pots & pans in the cafeteria to make gas money for my old Dodge.
Hobart was the name of the big mixer that they used to make mashed potatoes and such.
I had to wash out that old mixer bowl many nights late, standing in a puddle of dirty dish water.
Hobart was the name of the big mixer that they used to make mashed potatoes and such.
I had to wash out that old mixer bowl many nights late, standing in a puddle of dirty dish water.
Some aircraft have systems requiring:
1) 115 VAC 3 phase, 400 Hz power.
2) 28 VDC power
3) 270 VDC power
Some aircraft have systems requiring only 2 of the above.
That works for me, but the description of the generator says 400 Hz DC. So how can it be both? If it has a cycle it has to be AC, not counting dirty DC.
I read the description as having both 400 Hz, (obviously AC), and two voltages of DC. That damned comma in there, doncha know??
Yes its more complicated, but I figured the short story would suffice. Too much detail is boring.
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