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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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  #21  
Old 05-18-2019, 03:20:15 PM
Power Power is offline
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Default Re: Cool Old Twin 6-71 DC Generator

[QUOTE=AngrySailor;1575200]: oh yeah, forgot about the wood plugs... been there a few times. Nothing too crazy, worst was a sea chest vent valve broke off. 2Ē line so not too bad but what a pile of water comes in with ~26í head pressure

Never had anything completely break off. Some of weld would go, get a good stream of water. Drive in wedges to slow/ stop leak, cut tin can & fit over pipe, wire it up and pack it with fast set hydraulic cement. Looks really strange to see daylight through hull.

Then, depending on how it looks, if need be, get the welder and weld in some bracing to hold pipe in place until get to next port. Hope don't hit heavy weather.
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  #22  
Old 05-19-2019, 10:55:25 AM
AngrySailor AngrySailor is offline
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Default Re: Cool Old Twin 6-71 DC Generator

Fired her up this morning for grins. Thought I was filming but guess I didnít hit record Both engines fired right up with that sweet Detroit music Didnít clutch the generator in though.
Hereís a pic of the brushes and slip rings.

Power, does pic 2 look familiar?
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  #23  
Old 05-19-2019, 01:13:18 PM
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Default Re: Cool Old Twin 6-71 DC Generator

Ah, so it DOES use the transformer method of deriving a neutral! Neat! I have only ever seen it in old engineering books. Looks like there are only two rings? So a single phase transformer then. Would be neat to get a photo of that, but it could conceivably be just about anywhere.

Bummer about the video. Maybe you'll get another opportunity...

Keith
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  #24  
Old 05-19-2019, 02:45:01 PM
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Default Re: Cool Old Twin 6-71 DC Generator

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Originally Posted by AngrySailor View Post
Fired her up this morning for grins. Thought I was filming but guess I didnít hit record Both engines fired right up with that sweet Detroit music Didnít clutch the generator in though.
Hereís a pic of the brushes and slip rings.

Power, does pic 2 look familiar?
Starboard commutator brush #1 looks close to replace.
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  #25  
Old 05-19-2019, 03:50:07 PM
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Default Re: Cool Old Twin 6-71 DC Generator

Power, does pic 2 look familiar?

Also WOOD WEDGES. Click image for larger version

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Also larger wood plugs with longer taper for tubes on main and auxiliary condensers, oil coolers.

Steel plugs for economizer and boiler tubes.
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  #26  
Old 05-19-2019, 06:01:00 PM
AngrySailor AngrySailor is offline
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Default Re: Cool Old Twin 6-71 DC Generator

You’re right. That brush does look worn. I’d hate to see the winch motors... they always get neglected. That last motor we sent ashore had no brush tension and a broken brush holder. When I asked when it was service last I got blank stares.
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  #27  
Old 05-19-2019, 07:13:18 PM
Vanman Vanman is offline
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Default Re: Cool Old Twin 6-71 DC Generator

Ooh, can you get some photos of the winch motors too?
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  #28  
Old 05-19-2019, 07:28:30 PM
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Default Re: Cool Old Twin 6-71 DC Generator

Guess I am showing my age.
I am not clear how grain is unloaded.
I thought winching was from my era, and today it is vacuumed out.

PS- if you are going to take pix, original DC winch controls are probably more interesting than DC motors.
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  #29  
Old 05-19-2019, 08:14:19 PM
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Default Re: Cool Old Twin 6-71 DC Generator

Oh, definitely the controls too, especially any nameplates.
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  #30  
Old 05-19-2019, 10:20:46 PM
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Default Re: Cool Old Twin 6-71 DC Generator

Pics coming tomorrow. Motors are Westinghouse. Controls are drum switches. I’ll grab pics. The motors are fairly small physically compared to the last ship. Here’s a pic of the last Ships DC motors... about 3 ton, 75hp if I remember right.

Power, yes, they vacuum it out or clam shell buckets. I haven’t been on a straight back in 10 years though! This ship did have a bucket elevator system in each hold, but it didn’t work well I guess and is now defunct.
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Old 05-19-2019, 10:41:17 PM
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Default Re: Cool Old Twin 6-71 DC Generator

I'm 10 miles from port of indiana.
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  #32  
Old 05-20-2019, 08:19:19 AM
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Default Re: Cool Old Twin 6-71 DC Generator

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I'm 10 miles from port of indiana.
Burns Harbor? Iíve been there a few times, used to haul coal out of KCBX on the Calumet river a bunch of times also. This ship hauls grain almost exclusively so I doubt weíll be visiting. If we do you could come for a tour.

Hereís one of the DC motors the 6-71ís would power. This is the aft windlass. Itís a 50hp westinghouse.
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  #33  
Old 05-20-2019, 08:47:11 AM
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Default Re: Cool Old Twin 6-71 DC Generator

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Originally Posted by AngrySailor View Post
Burns Harbor? Iíve been there a few times, used to haul coal out of KCBX on the Calumet river a bunch of times also. This ship hauls grain almost exclusively so I doubt weíll be visiting. If we do you could come for a tour.

Hereís one of the DC motors the 6-71ís would power. This is the aft windlass. Itís a 50hp westinghouse.
Yes burns harbor, I thought alot of grain goes outta there? TOUR! Yes of course.
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  #34  
Old 05-20-2019, 10:39:40 AM
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Default Re: Cool Old Twin 6-71 DC Generator

I’ve only ever hauled coal/coke out of there. We used to load Gypsum at Sydney mines Nova Scotia for Kingston Ontario, then run lightship to Chicago to load coke for a power plant in Point Tupper Nova Scotia. Rinse and repeat. This ship seems to run grain east from Thunder Bay to ports out the St. Lawrence. Sorel Quebec, Sept Isle, occasionally Hamilton Ontario or Windsor. I’ll drop a PM if we ever get down that way. Most ships are pretty easy to get a visit aboard if you know anyone on the crew. Just have your name added to the security list and good to go.
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  #35  
Old 05-20-2019, 01:20:41 PM
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Default Re: Cool Old Twin 6-71 DC Generator

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Originally Posted by AngrySailor View Post
This ship did have a bucket elevator system in each hold, but it didnít work well I guess and is now defunct.
I saw them long ago when they were popular Only advantage is low ship power consumption. Slow, PIA, Ones I saw made dust and need a man with a small dozer or bucket loader in hold to clean up. Another source of grain contamination. Faster than crane with clamshell.

The vacuum system is shore powered, so can shut down ship gen. Makes no dust, is fast and needs no cleanup- works like a vacuum cleaner. Does not contaminate grain with leaking fluids or grease.
I have only seen from end of pier.
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  #36  
Old 05-20-2019, 02:33:23 PM
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Default Re: Cool Old Twin 6-71 DC Generator

Apparently only a couple of the larger ports use a vacuum system. There are still front end loaders and sweepers to move the grain to the vacuum. Windsor is clam shell buckets. This is gonna be a blast from the past. Iíve been on self unloaders the last 9 years.

We ran the M/E today, damn sheís quiet! CAT C-18 generator was loudest piece of machinery running.
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  #37  
Old 05-20-2019, 02:50:50 PM
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Default Re: Cool old twin 6-71 DC generator

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No Jinx or Bad JU-JU intended but that ship looks just like the Edmund Fitzgerald.

COOL Dual Detroits. Isn't one engine run clockwise and the other counter clockwise? I'm sure Angry, You will just have to "Test" run those old Girl's to make sure they still "Sing" properly. I bet that on the older ships you sign on to that you are like a Kid in a Candy Store when you get down to the Engineering room!
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  #38  
Old 05-20-2019, 02:55:43 PM
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Default Re: Cool old twin 6-71 DC generator

No worries. They’re very similar! There’s still a bunch of the old style lakers out here. I prefer sailing on them to the newer ships. Times have changed since the Fitz sank. There’s no so much of a push from the companies to sail in bad weather. We often stay in port or at anchorage if the forecast is real bad. The captains know these ships aren’t new also so tend to be a little more cautious of the conditions. Heck this ship is 10 years newer than my last!
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  #39  
Old 05-20-2019, 03:26:51 PM
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Default Re: Cool Old Twin 6-71 DC Generator

So what year was She built?
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Old 05-20-2019, 03:27:12 PM
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Default Re: Cool old twin 6-71 DC generator

Kinda funny you riding ships older than you are. I rode some as old as I am (1943) but not older.
I was told on pneumatic (vacuum) systems that nozzle was moved around eliminating need for anyone in hold. Guess not.
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