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Re: (erielack) ERIE PASSENGER Fs

On Wed, 31 May 2000, A Samostie wrote:

> Hi All.
> Another question on F units in general...
> Why did some have the high-profile roof fans (with the cylindrical
> housing rising above the roof line), while others had the more
> "streamlined" low-profile fans?  Was there any difference between the
> two other than appearance / clearance?
> 
> Were the two types of fans available on all F units (F3, F7, F9), or did
> they switch exclusively to low-profile fans on later units?  Which was
> the "standard" fan?  
> 
> Cheers,
> Alan <"quahog_@_sprint.ca">

EMD changed to low fans in mid '47 F3 production, it was probably an economic
decision. F units had three types of raditor fans through their production, the
below the roof FT fans, the high shroud F2 and early F3 fans and the lower
profile F3, 7 and 9 fans. Fan types weren't an option, just production changes.

The exterior design of the fan wouldn't be the performance factor, the rating
of the fan mechanism itself would be.

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