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Generators & Electric Motors General Discussion Antique Generators and Old Electric Motors: Questions and answers about restoring and showing old power generation systems.

Generators & Electric Motors General Discussion

Cool Old Twin 6-71 DC Generator


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  #41  
Old 05-20-2019, 03:59:05 PM
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Default Re: Cool Old Twin 6-71 DC Generator

When I first started at UPS in 1976, They had some these old Grumman built, Chevy powered package cars. They were 1953 vintage and I am 1952 vintage. http://www.curbsideclassic.com/curbs...ficial-cc-van/

By 1976, the bodies and frames were getting real loose! Fast, straight-away driving was a butt puckering experience to keep it on the road. They were the stovebolt 235 with updraft carbs and a vane governor. You would be hammer down trying to pass someone in high gear and then all the sudden the vane closed down and it fell on it's face, and you had to retreat back to your lane.
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  #42  
Old 05-20-2019, 04:45:17 PM
AngrySailor AngrySailor is offline
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Default Re: Cool Old Twin 6-71 DC Generator

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So what year was She built?
She was built in ‘52. Last ship I sailed on was built in ‘43.

Power, I think there is limited movement. You still have to clean the last bit by hand.

I bet a strategic piece of twisted up coat hanger would have fixed that vane governor
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  #43  
Old 05-21-2019, 12:39:09 AM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: Cool Old Twin 6-71 DC Generator

Angry Sailor, Your power transfer gear is in the D.D.series 71 engine and gears manual. Both engines turn the same direction. ALClick image for larger version

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  #44  
Old 05-21-2019, 01:57:15 AM
Vanman Vanman is offline
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Default Re: Cool Old Twin 6-71 DC Generator

That is unbelievably cool!

I wonder if horizontal engines could be used, and the whole assembly could go under the floor of my bus, in place of the single engine that's there now?

Redundancy, run one engine most of the time, alternate between the two every so often, double power on grades, man, that would be sweet!
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  #45  
Old 05-21-2019, 08:35:03 AM
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Default Re: Cool Old Twin 6-71 DC Generator

That would be cool! I wonder if they would sound different every time they’re clutched in together or if it would be even noticeable that the phasing between them would be different every time. It may not sound as even as say a 12v71
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  #46  
Old 05-21-2019, 11:14:43 AM
miltruck miltruck is offline
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Default Re: Cool Old Twin 6-71 DC Generator

Because all cylinders fire every stroke, I believe that the phasing is less critical than with a 4 cycle engine. I'm guessing about 300-325 hp at 1700-1800 rpm. If the exhausts are water cooled, I will bet that the noise is really not that bad, just a lot of gear noise. The complete unit w/ gear case must weight close to 2 tons if everything has an iron case/block/head.

A variation of this setup was used in WWII for one of the diesel versions of the M4 Sherman tank, about 375-400 hp or so. Problem was fuel supply for the military at the time was mostly gas so not a lot of them were deployed. Plus the Ford V-8 gas version of the M4 had 500 hp, weighed a lot less than the dual diesels and had more ground speed. Both engines must have sounded great (loud) cooped up in the steel hull of the tank. Would hate to try and start one of these in a hurry during the Battle of the Bulge with the thermometer hovering just above zero. Would need a blow torch stuck in the blower to heat the intake air up so it would maybe even fire with the old style injectors and the low compression pistons of the day. Those tanker crews were real men.
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  #47  
Old 05-21-2019, 02:40:55 PM
AngrySailor AngrySailor is offline
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Default Re: Cool Old Twin 6-71 DC Generator

Dry exhaust but it’s piped up the funnel outside the engine room and insulated. I ran them a couple days ago, didn’t clutch them in but ran them up to operation rpm. They weren’t loaded so noise wasn’t too bad but then again I LIKE Detroit music! The blowers were probably the loudest noise. She’s got 4 oil bath air filters so that probably quiets her down some too.
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Old 05-21-2019, 02:53:00 PM
Power Power is offline
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Default Re: Cool Old Twin 6-71 DC Generator

Quote:
Originally Posted by Vanman View Post
That is unbelievably cool!

I wonder if horizontal engines could be used, and the whole assembly could go under the floor of my bus, in place of the single engine that's there now?

Redundancy, run one engine most of the time, alternate between the two every so often, double power on grades, man, that would be sweet!
With all the accessories, maybe 9-10,000 pounds. Wonder how the bus would handle it. Vanman, did you say steering feels a bit light
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  #49  
Old 05-21-2019, 05:21:45 PM
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Default Re: Cool Old Twin 6-71 DC Generator

Haha, these are mid-engine buses, so I'd need to get the power steering in top shape!

My three axle bus weighs around 20k, give or take, and GVW is 45k, so would technically be doable. But that's a LOT of extra weight to be carrying around lol.
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