f7

f7

Postby jmass » Fri Apr 27, 2012 8:50 pm

i seem to remember reading somewhere or maybe it was a MR video saying their was a streched version of the f7 and also the f9. i beleive it was streched by three feet.
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Re: f7

Postby Marquette » Fri Apr 27, 2012 9:41 pm

If I'm not wrong that's the FP7 and FP9. The extra space was for a boiler.
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Re: f7

Postby scaro » Mon Apr 30, 2012 9:46 am

4' was added to the length between truck centres, so 30' for a F7/F9 and 34' for an FP7/FP9.

most F units made on euro chassis more resemble FPs rather than Fs, this holds true in Z, N and TT. obviously the 34' length between truck centres is more common for euro locos than 30'.

a 34' chassis is also correct for second generation GPs (provided it's thin enough to fit under a hood.)

in the 60s it seemed to be that manufacturers would release the most 'advanced' or powerful model so that might be another reason FPs were popular as they were among the last F units. however, it's not the smartest choice if you are a prototype modeller, there were almost no FP9s in the USA, saudi arabia and canada had more.

the tillig F is closest to an FP9 as is the coastal engineering unit.
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Re: f7

Postby Richard-B » Tue May 01, 2012 8:22 am

Marquette wrote:If I'm not wrong that's the FP7 and FP9. The extra space was for a boiler.


You are -not- wrong!

Handy reference sheet attached: X2200 Magazine - Jan 1970

F-unit Phases_x2200s-1970.jpg
F-unit Phases... from X2200 - Jan 1970
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Re: f7

Postby ConducTTor » Tue May 01, 2012 9:57 pm

thx for that ^^^^
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