Anyone know what this is?

[Icesythe7]

The pictures do not include a plate with name/specs nor does the listing and I'm curious as to what it is and specs.

 

[Scoobyshep]

View attachment 903324

The pictures do not include a plate with name/specs nor does the listing and I'm curious as to what it is and specs.

The power connector is a GPC connector its for aircraft. I bet you a dollar its 28vdc and or 3 phase 120v 400 hz

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[Triple Jim]

It appears to be a motor-generator set that takes 60 Hz 3 phase input at 10 kW, and puts out 400Hz AC. I base that on this page that I found with a Google search for the NSN.

https://www.aviationpurchasingplatf...-generator-company-llc/6125007248947/kurtmd2/

 

[Icesythe7]

It appears to be a motor-generator set that takes 60 Hz 3 phase input at 10 kW, and puts out 400Hz AC. I base that on this page that I found with a Google search for the NSN.

https://www.aviationpurchasingplatf...-generator-company-llc/6125007248947/kurtmd2/

Thanks for the responses, really like the design of it was thinking about grabbing it if it was even slightly useful to me but it would appear as it is not.

 

[Scoobyshep]

Thanks for the responses, really like the design of it was thinking about grabbing it if it was even slightly useful to me but it would appear as it is not.

If you have money to blow there is ways to make 60 hz power. Or any non rotating things should work (resistive heat lights etc. No motors)

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[Triple Jim]

If you have money to blow there is ways to make 60 hz power. Or any non rotating things should work (resistive heat lights etc. No motors)

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The trouble is that this unit appears to have an electric motor driving a 400 Hz generator to convert 60 Hz AC to 400 Hz AC,

 

[Scoobyshep]

The trouble is that this unit appears to have an electric motor driving a 400 Hz generator to convert 60 Hz AC to 400 Hz AC,

In that case an extremely cool paperweight?

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[Light in the Dark]

I don't know for certain, but definitely looks like 400hz flight line equipment.

 

[Scoobyshep]

I don't know for certain, but definitely looks like 400hz flight line equipment.

I can tell you for sure its for aircraft. The square 6 pin plug is for aviation ground power.

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[jeffhuey1n]

A long time ago, back in 1986 or so, I was stationed at Hill AFB and we had some ancient power carts called MD3’s. They were capable of self propulsion at an underwhelming speed of 20 feet per minute or there about. The last one I saw was being towed behind an aircraft tug and was headed for the AGE shop. The tug made a RH turn but the MD3 kept going straight. The pin connecting the tow bar to the MD3 sheared. It kept going and rammed someone’s pickup. We replaced all of them with Hobart power carts. They weren’t self propelled. It took 3-4 guys to move one from one helicopter to the next (tug not available).
They produced 28 VDC at 400hz if I remember correctly. Don’t hold me to that, it was my first year in the AF after serving four years in the Marines. Lots of memories but really fuzzy details.

 

[jeffhuey1n]

Here’s a link to one in the AF museum:

MD-3 Ground Power Unit

This unit was designed to provide 28-volt DC 1500 amp, 115/220-volt AC three-phase electrical power for B-47 aircraft for ground operation and start. It also can be used with other aircraft (such as

www.nationalmuseum.af.mil

 

[Scoobyshep]

A long time ago, back in 1986 or so, I was stationed at Hill AFB and we had some ancient power carts called MD3’s. They were capable of self propulsion at an underwhelming speed of 20 feet per minute or there about. The last one I saw was being towed behind an aircraft tug and was headed for the AGE shop. The tug made a RH turn but the MD3 kept going straight. The pin connecting the tow bar to the MD3 sheared. It kept going and rammed someone’s pickup. We replaced all of them with Hobart power carts. They weren’t self propelled. It took 3-4 guys to move one from one helicopter to the next (tug not available).
They produced 28 VDC at 400hz if I remember correctly. Don’t hold me to that, it was my first year in the AF after serving four years in the Marines. Lots of memories but really fuzzy details.

Typically they produce 28vdc and 120 400hz. Aircraft use the high frequency because motors and transformers can be smaller and lighter

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[G744]

Yep, a 400Hz 1HP motor can turn 5200 RPM, and is about the size of a Quaker oats cardboard can.

 

[Guyfang]

Yep, a 400Hz 1HP motor can turn 5200 RPM, and is about the size of a Quaker oats cardboard can.

We had 200 KW and a 100 KW motor converter sets, (General Dynamics) on our hawk site. 220/416 volt, 50 hertz to 416 three phase, 400 hertz. Both of them slept 4 people across. Kinda handy in the winter, when we were locked up on site. Ear plugs and Micky Mouse head phones. Might also be a good reason I wear hearing aids.