Junkyard's work thread.....maybe haha

[Truck Shop]

Well they better figure out how to make that potato masher make more HP and Torque or it won't sell worth Sh!t.----Fact. But the biggest problem with engines like that
are too many moving parts, always has been. First lesson for a design engineer-Keep it simple.

Truck Shop

 

[John C.]

The other issue was there was no electric starter big enough to turn that monster 8 1/8 engine over fast enough to start it. All I've worked on or seen was an air start with air directly injected into the cylinders. Each engine had a huge air tank in the space that was fed by the same air pressure they used to fire torpedoes with. I don't remember the high pressure but the start pressure in the tank was around 300 PSI.

Last item is the physical size of opposed piston engines. Two cranks makes for a tall motor. Here is a photo of some surplussed Fairbanks engines.

 

[old-iron-habit]

The other issue was there was no electric starter big enough to turn that monster 8 1/8 engine over fast enough to start it. All I've worked on or seen was an air start with air directly injected into the cylinders. Each engine had a huge air tank in the space that was fed by the same air pressure they used to fire torpedoes with. I don't remember the high pressure but the start pressure in the tank was around 300 PSI.

Last item is the physical size of opposed piston engines. Two cranks makes for a tall motor. Here is a photo of some surplussed Fairbanks engines.

View attachment 188908

Looks like the ones they took out of our local municipal power house about 15 years ago. Our city owned utility buys power normally but fired up our generators manually when the weather got bad and power outages were more often than not going to happen. I would have liked to have scored one but they cut them up in place for scrap and ease to remove them. Now we got 3 automated 3516 Cats for backup to the purchased power from the big box store utility.

 

[Truck Shop]

I was wondering about the physical size myself, as small as the engine compartments are on trucks these days and all the crap piled on the outside of that engine it must
be a real turd to work on. The DD15 is bad enough jammed in a Cascadia. Look at the PacCar engine flop.

Thread Hi-Jack

Truck Shop

 

[DMiller]

The Colt Pielstick engine/generators we had at the nuke were started by Compressed Air, had two compressor/receiver systems permanently married with multiple cross connect prevention systems, way too over engineered. Worked off 650psig average pressure, minimum for a roll off was 450psig. Had three rolls capability before ran too low to roll it off. They are actually sold/serviced by Fairbanks Morse in the US. Had to be up, running at speed(514RPM) and loading the emergency systems on the buss in 14 seconds, 6.2mw generators.

 

[hvy 1ton]

Cummins picked up a DOD contract last year to design an opposed cylinder diesel for use in armored fighting vehicles. Looks like the contract was a joint venture between Cummins and Achates.

 

[willie59]

I'm going deep into the cobwebs in my head, and I may be full of beans, but didn't the Brit's make some kind of crazy engine like the horizontal opposed engine being discussed here?

 

[Junkyard]

No worries on the hijack! We’re all here to shoot the $hit and learn!

 

[John C.]

I seem to remember the slang name for the Brit engine was a comerknocker. I saw a video on here somewhere of a truck with one I think. Most likely something Nige posted.

 

[DMiller]

Yeah the Brits had a penchant with over technified machines seemingly forever. Was a Commer Truck and engine, nicknamed the Commer Knocker:


https://en.wikipedia.org/wiki/Commer_TS3

 

[DMiller]

BTW in that picture I posted, the Green pipe is 8" schedule 40 steel, the system it is off of is the Intercooler heat exchanger, the one at the end of the engine is the jacket water and there is a third LARGER unit on the opposite side Engine Oil cooler(the radiators for this). There is a manual Stop Bypass handle, I enjoyed being the tech to Test that function with the engine under full power, took Both hands and a braced foot to pull the governor off full fuel to bring the big pig to a stop. The governor is just to the left of that stop lever, Isochronous Woodward. The Yellow pipes are fuel, the air start feed is the lines converging on the T with the red handled half turn valves under the governor and lube oil pump. 750 gallons engine oil in this one.

 

[John C.]

The Fairbanks were about the same in size but didn't put out as much horsepower. The two in my photo probably were around 1,000 horses while the gen sets on the ship I was on were 1,450. The Pielstick when I got out of the service was advertised as one horse per cubic inch. We had Woodwards on those as well but the manual stop was a rack trip lever. Push the button on the end and move the short lever to stop and you could feel the snap as the racks dropped to no fuel. The Fairbanks on the ship had dry sump oil systems and the oil was held in a tank on the upper level of the space. It was 350 gallons and it really sucked to change oil. It had to be done with a little back and forth handle on a pump mounted on the wall putting out maybe a quart of oil with each stroke.

That's an great photo. Those monster engines are impressive but today you see the same output in a lot smaller packages.

 

[StanRUS]

Cummins picked up a DOD contract last year to design an opposed cylinder diesel for use in armored fighting vehicles. Looks like the contract was a joint venture between Cummins and Achates

Cummins (Achates) OP 4cyl 8piston going into Bradley vehicle within a few weeks for DOD testing.
Fairbanks (Achates) OP 5,000Hp + is in production
Two-Stroke NOISE

37mpg, that is okay

 

[DMiller]

Sounds eerily similar to a 6V53

 

[John C.]

Looks like you have to pull the whole front end off the truck to work on it.

 

[Birken Vogt]

Looks like you have to pull the whole front end off the truck to work on it.

Well that is nothing new....

 

[DMiller]

Pretty much true on the nothing new, Ford and independents have been removing cabs to work heads on 6.0, 6.4 even the late 7.3 engines as was faster than working under the hood. Late model GMs I have heard are as bad or worse on the Duramax.

 

[RZucker]

Sounds eerily similar to a 6V53

Nailed it....

 

[Junkyard]

Go Greyhound! Haha. Good luck in a drive thru with that! You don’t suppose it really is a 6v-53 with some fancy camouflage......

 

[StanRUS]

Good luck in a drive thru with that!

Drive thru, drivers shut off racket making engines

@Mr. Miller
Try this URL http://www.pielstick.com/
Pielstick Licensees manufacturing S.E.M.T series engines around the world over the years 38, currently 8.
Complex design / Jumo 223 24cylinder 48 piston operating @ 4,400rpm; never reached that design intent.

Link for Engine Junkies
https://oldmachinepress.com/2015/09/26/junkers-jumo-223-aircraft-engine/