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Post by yachtsmanwilly on Apr 16, 2021 17:36:27 GMT -5
Thats a good one SKY! I am definitely gonna look into this... theres fire detectors throughout, but I havent seen an annunciator. Hmmm. Theres a fire alarm board w/lights in the PH, but nothing downstairs. Theres a DC driven fire pump and the on/off switch (by ABS regs) is mounted outside the ER door on deck. Underway, that in itself is supposed to be valved "ON" and available. You can betyer bottom bux I'll look into that
Due to its age and "open air fiddley" its grandfathered for hand held CO2 units are all over the place (and UTD).
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Post by skycheney on Apr 16, 2021 19:16:59 GMT -5
Thats a good one SKY! I am definitely gonna look into this... theres fire detectors throughout, but I havent seen an annunciator. Hmmm. Theres a fire alarm board w/lights in the PH, but nothing downstairs. Theres a DC driven fire pump and the on/off switch (by ABS regs) is mounted outside the ER door on deck. Underway, that in itself is supposed to be valved "ON" and available. You can betyer bottom bux I'll look into that Due to its age and "open air fiddley" its grandfathered for hand held CO2 units are all over the place (and UTD). Wish I was there to help.
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Post by yachtsmanwilly on Apr 17, 2021 5:36:18 GMT -5
The BADGER starts running May 15th LOL... Right now its a little difficult to diagnose and then troubleshoot 55 years of age AND a multitude of "Handy Hank" guys field repairs etc. We're gonna work on it tomorrow; Nate will be here to assist. Some of it needs a TALL guy to do stuff that requires standing on piping (NG) and some requires a Basketball player with 20 FOOT LONG ARMS haha.
I think we'll start at the ER alarm junction box and see if a feed wire dropped off/out of the loom. It really needs to be something simple. Bill
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Post by yachtsmanwilly on Jun 2, 2021 6:15:06 GMT -5
So, in getting ready for some service, just going over some stuff on the tug and need some advice on a few issues, but the biggie is this: The F-M 38D had a really bad problem blowing oil/fuel outa the stack soaking the back end of the boat. The #1 engineer didnt have a clue, so whilst perusing an engine room log, I noticed some remarks about scavenging air regulation. Hmmm. Instead of turning valves and throwing switches, I paid attention to what was going on. Regulating the scavenging air to about 2" of Hg, the situation cleared up within an hour and commenced to burn the shit inside the stack to a point where its just about ash.
Theres cylinder pyrometers, and hopefully one on the engine to stack joint. Ideally, depending on load, what should we be looking at for EGTs? Tring to get away from having to cut a ma hole into the muffle to clean it.
While on top of the deck house in the stack shell, theres evidence of wet stacking on the 3-71 30Kw DC light plant. Theres virtually no way to really load up the unit; battery charging duties and air compressors for an hour ( 2 3hp units) and a few misc. DC motor like a pump, steering m,otor, and capstan probably base loads this guy at 2-3 Kw. Would there be any benefit in downsizing the injectors? Theres no smoke running or start up. The EGTs are unknown as well as injector size being UK. For the sake of talk, if they were N70s, would an N60 make a difference? Its set to run at 1200 rpm I believe. Volts are regulated via a rheostat on the DC board. Thanks Scrod! Ill trust you on this one LOL... ws
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Post by banned on Jun 2, 2021 6:53:10 GMT -5
371 271 all do that if they're not loaded. For some reason info on EGT is hard to find. The EMD target under load was 700 but those are 2 strokes and run much colder. Be careful cooking the oil out of the stack. I was part owner of a dinner boat in Freeport NY The "Lady Edna" It was a 3 deck steel catamaran with a wood superstructure. I converted it from a fishing boat the "hell Cat" out of Connecticut to a dinner boat first one in Freeport. It had a pair of 12 71's dry stack exhaust that was in a steel enclosure going through 3 decks with the exhaust pipes and mufflers inside and wrapped with mineral wool. Each stack had a 3HP fan at the bottom to blow air up through the stack and pull air through each engine room.
So running those engines so slow would build up oil in the stacks and that was bad because when you had to give it power droplets of black oil would blow out and get all over the passengers on the third deck. So we would take it out and crank it up every 3 weeks or so to burn the oil out. 3 guys taking the boat to yard for a haul traveling off the coast of Long Island crank it up and got the usual heavy smoke as the oil burned out of the stacks. This time the port side was smoking more and not cleaning up. So they go into engine room and look up into stack and see a fire. Then they made a critical mistake they turned the fan off. Hot oily vapor blew back into the engine space and throughout the boat it caught fire and in a few minutes it was out of control. The boat burned to waterline and sunk three crew jumped in the water and got picked up by CG. I bet Derek remembers it was all over the news. It was later determined that the port muffler had a hole in it so the mineral wool got saturated with oil and caught fire. They never should have turned off the fan even though it was feeding the fire it was also keeping the fire contained within a steel structure. Anyway be careful with that.
Brian
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Post by Avenger on Jun 2, 2021 8:55:18 GMT -5
I'm afraid to ask, don't you have a manual? Here's the relevant page for exhaust temps. Also, see note 2 about Average full load temps. Smaller injectors is not likely to help since the rating refers to full load output and the governor will throttle the injector to only deliver the fuel necessary for the load. However, IIRC those things are really OLD 2 valves? If they're that old, they're probably Low Valve or High Valve injectors, in which case they'll never run really clean, even at full load. If they are LVs or HVs or something else that archaic we can do a needle valve conversion which will clean them up considerably. You'll have to pull the valve cover and look at the tag on the injector to see what it is. Sorry Brian, no recall of the Lady Edna, although my memory is getting a lot like the president's lately.
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Post by yachtsmanwilly on Jun 2, 2021 9:35:56 GMT -5
371 271 all do that if they're not loaded. For some reason info on EGT is hard to find. The EMD target under load was 700 but those are 2 strokes and run much colder. Be careful cooking the oil out of the stack. I was part owner of a dinner boat in Freeport NY The "Lady Edna" It was a 3 deck steel catamaran with a wood superstructure. I converted it from a fishing boat the "hell Cat" out of Connecticut to a dinner boat first one in Freeport. It had a pair of 12 71's dry stack exhaust that was in a steel enclosure going through 3 decks with the exhaust pipes and mufflers inside and wrapped with mineral wool. Each stack had a 3HP fan at the bottom to blow air up through the stack and pull air through each engine room. So running those engines so slow would build up oil in the stacks and that was bad because when you had to give it power droplets of black oil would blow out and get all over the passengers on the third deck. So we would take it out and crank it up every 3 weeks or so to burn the oil out. 3 guys taking the boat to yard for a haul traveling off the coast of Long Island crank it up and got the usual heavy smoke as the oil burned out of the stacks. This time the port side was smoking more and not cleaning up. So they go into engine room and look up into stack and see a fire. Then they made a critical mistake they turned the fan off. Hot oily vapor blew back into the engine space and throughout the boat it caught fire and in a few minutes it was out of control. The boat burned to waterline and sunk three crew jumped in the water and got picked up by CG. I bet Derek remembers it was all over the news. It was later determined that the port muffler had a hole in it so the mineral wool got saturated with oil and caught fire. They never should have turned off the fan even though it was feeding the fire it was also keeping the fire contained within a steel structure. Anyway be careful with that. Brian Thats a great synopsis Brian! Thats going to the boss like RIGHT NOW! Thanks for the pic SCROD!! I know its in the book which for now is buried in the library. Just never pulled it out, The FB book(s) need some going over too. Just been busy getting the stuff up and running. The part owner/#1 engineer kinda bailed on us. Just a lot of stuff to figure out how and where. The guy was a valve turner/on-off switcher and it was all a big secret to him. He'd make weird adjustments not knowing what he was doing...and for me to figger out! ws
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Post by Avenger on Jun 2, 2021 9:52:59 GMT -5
Just to avoid any confusion, that is the F-M 38D8-1/2 book
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Post by banned on Jun 4, 2021 6:29:08 GMT -5
There you go I did the needle valve conversion on every 2 valve DD I owned used to get them from Brown Diesel in Staten Island Makes a HUUUGE difference
Brian
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