PRR Baldwin Passenger Sharks

Baldwin DR6/Pennsy BP20  Wikipedia says naturally aspirated. But apparently only a very few of these were built.  There were two different prime movers used. One was an 8 cylinder naturally aspirated. 608NA.

The Pennsy units appear to have been powered by a 6 cylinder turbocharged unit. 606SC  There had to be (2) prime movers and gensets to get the 2000 hp rating.

RF16 Shark nose.  Wikipedia says turbocharged. Powered by a 608A Baldwin unit. 1600 hp. Appeared to be a reliable unit. There is reference to these being repowered in later years with Alco prime movers.

Mike,

Thanks for the information.  

I have conflicting information.  Pennsy Power II says the passenger sharks had 8 cylinder, 1000hp engines.  These would be the normally aspirated engines.  As you have discovered, another source says they used the 606sc, which was supercharged. I think your data is correct.  I will continue to search.  Hopefully, I will find a definitive answer.

Thanks again,

Ed

Ed:

I did a further search for the 606SC prime mover after the original infomation, which yeilded:

The DS-4-4-1000 Baldwin Switcher wikipedia blip.  This info shows both prime movers were used in this unit.   That's where the turbocharged info was. At that point I assumed the 606SC motors in the BP20s were turbo-charged, but maybe they weren't. Interesting to note the small number of these units (39) Two, possibly three different body styles, only the Sharknose was Pennsy (27) 18A and 9B  The other 12 units were termed "Baby face" with a couple of double cab units (CNJ). 

Mike,

Pennsy Power II, page 258, stated that the BP-20's had two 8 cylinder engines rated at 1000hp each.  These had to be the 608NA, the normally aspirated engine.

http://railroadlocomotives.blo...nes-in-photos-2.html

This is where I found that the 608NA was replaced by the 606sc.  Both were rated at 1000hp.

Then, the info from Wikipedia, quoting the 2nd Diesel Spotters Guide,  states that the 606sc was exclusive to the Pennsy.

Apparently, there are conflicting statements as to what was in the BP-20's.

Such a worry to get it right!

Cheers,

Ed

Ed: I have the Weaver TMCC BP20.  I never really thought about the sound, I think it has Alco sounds??   We could ask Neil Schorr he was tech support on this project. I sent him an E-mail this morning. 

I sure wish I could find one of the Weaver 2 rail PRR BP 20's for sale. I've looked everywhere with no luck. I was on Weaver's list for the second run but they cancelled it.

According to the John D. Hahn book (Withers Publishing) "Baldwin Cab and Transfer Units", the Pennsy BP20s all had the 606SC diesel.   2 per unit.   

This is also confirmed in "Diesels from Eddystone" by Dolzall.   In the Dolzall book they state that the 606sc superceded the 606na on the Pennsy order.   

I think I saw a Weaver BP20 for sale on Ted Schneff's table at the Chicago show.    http://railsunlimited.ribbonra...oxValley/layout.html.   

I don't mean to be picky, and I am far from being an expert on the nuances of Baldwin diesels, but I think we ran over a derail a few posts back.

The Baldwin 2000-hp passenger diesels all had two engines.  The older ones had two eight-cylinder 608-NA normally aspirated engines, and, somewhere between the first and last one, they changed to six-cylinder 606-SC turbocharged engines to get the same horsepower.

My personal experience with Baldwin is limited to switchers, transfer units and AS-616's, so I'll keep my nose out of the discussion of which passenger units had 8 or 6-cylinder engines.  I just wanted to clarify that the 606-NA could not have been used in a 2000-hp passenger unit because it only produced 600 (later 660) horsepower instead of 1000.

You are right - I guess.   I went back and looked and the book says the 606SC replaced the 608NA on the PRR order.   I misread the book the first time.     And yes it does state that the 2000 HP units had 2 prime movers and generators each rated at 1000 HP.

I was reading conflicting information and you guys cleared it up.  Thanks very much.

BTW, what prime mover did the AS616 have?  Which horn did it use?  That may be my next project.

Thanks again,

Ed

AS-616 used the 8-cylinder turbocharged engine, the 608-SC, to make 1600 hp.