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Saw a weird "Semi-Diesel" industrial engine

diesel4me

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A guy I know who works at a cranberry bog as a maintenence man keeping the equipment and pumps running ,showed me a rather strange industrial engine recently..

Its a Hercules that came off an old water pump that was in a city water supply system as an emergency back up ,in case power was lost..
It was made in the early 50's he thinks,and it had only 50 something hours on it,according to the meter when they bought it at a surplus auction,it now has over 6000 hours though!..they run it 24/7 for several months a year ..

Whats strange about this engine is it burns diesel fuel,but it HAS spark plugs!--and a coil and a distributor....the compression ratio is around 15:1 as far as he can determine by what sparse info is available on these engines at the library,and he hasn;t seen much posted about them online either really..

He says it starts right up easily,even in colder weather,only a few times did he have to use ether to coax it along when it was below 10 degrees a few times...

After seeing it ,I thought to myself--too bad I couldn't put some 10MM spark plugs in my 6.2 ,if it had a distributor or a way to hook one up you'd never need glow plugs again!...not sure if it would work though,being a "true" diesel with 22:1 compression ,it might not make a hot enough spark to ignite cold diesel fuel...maybe it would allow for some exotic alternate fuels to be used though...
 
the early military deuce and a halfs were multi fuel engines too. they are of that same vintage.
 
diesel only needs the heat of compression to ignite. 22:1 is very high for a diesel as well. the only reason its that high is because its naturally aspirated. 4 stroke turbo diesels are considerably lower. in the 16-18:1 range -ish.
 
the early military deuce and a halfs were multi fuel engines too. they are of that same vintage.


One day not that long ago while taking a tour of a favorite junkyard,I came across a huge straight six Continental "Multi-Fuel" engine that evidently was removed from one of several large military trucks they purchased at auction..thing had a tag stating it was rebuilt too,had the date and mileage stamped into it..painted all pretty olive drab green..probably ran nice too I bet..not after lying there for months though probably..

I felt sad,seeing it lying there in a mud puddle in the middle of a gravelly area surrounded by weeds..someone is probably in need of one somewhere,and here's a (formerly) good one lying there rusting..:(..if it didn't weigh 2000 lbs it would be the ultimate "bug out" vehicle power plant!..
 
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