ALCO 251

Discussion of products from the American Locomotive Company. A web site with current Alco 251 information can be found here: Fairbanks-Morse/Alco 251.

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Re: ALCO 251

Postby Typewriters » Sun Jun 21, 2015 5:40 pm

Thank you!

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Re: ALCO 251

Postby EDM5970 » Tue Jun 23, 2015 9:35 pm

The US Coast Guard uses 251s for main propulsion on two classes of cutters. The 210 foot cutters have a pair of 16-251s, I believe rated at 3200 HP each, while the 270s have a pair of 18-251s, rated at 3500 HP each. I've had the pleasure of standing between a pair of the 18 cylinder engines, running at about half speed. :-) The Polar class icebreakers (Polar Star and Polar Sea) each have SIX 251s. I believe the US government and some of the utilities are the largest purchasers of new 251 engines and parts at this time.
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Re: ALCO 251

Postby NorthWest » Tue Jun 23, 2015 10:04 pm

The interesting thing about the 210ft RelianceClass WMEC cutters is that the 251s replaced Cooper-Bessemer FVBMs, which are a marine version of the FDL family in the late 1980s (Like a reverse version of the planned Century Super-7s?). The 251s are conservatively rated.
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