GP-9's or GP-7's

[GCH]

I am confused as to weather or not the Milw Road had any GP-7's. Case in point, I have purchased the MILWAUKEE ROAD 1928-1985, and on page 231, the caption states that two Joes are assisted by a GP-7, yet nowhere have I read in the book MIlw owned any GP-7's.

Also this link of the milw roster does not have any GP-7's listed, only GP-9's;

http://www.trainweb.org/milwaukee/roster.txt

Is this a typo or True graemlins/confused.gif

George H

[BoxcabE50]

Is that the Scribbin's book?

It's an error, of unknown origins. They owned several phases of GP9. Never a GP7.

:D

Boxcab E50

[William Cowie]

Which raises the question from dummies like me: what exactly is the difference between these two (other of course than the horsepower rating)? In other words, can someone show the spotting differences in pictures? smile.gif

[GCH]

Yes it is the Scribbins book, and thanks for the response. I really like the book, do you have it?

Thanks George H

[GCH]

William:
I don't have any reference material in front of me, but they look the same to me also, like you said other than horsepower I don't know

George H

[Flash Blackman]

On another thread; same subject:

http://www.trainboard.com/ultimatebb.php/ubb/get_topic/f/13/t/002000.html

I don't think there is much external difference.

[BoxcabE50]

Originally posted by GCH:
Yes it is the Scribbins book, and thanks for the response. I really like the book, do you have it?

Thanks George H Unfortunately, I do not have a copy. I've one whole shelf of publications about the Milwaukee Road. Hoping that after Morning Sun V5 and V6, plus the Steinheimer book re-issue, that I'll be able to budget money more toward modeling.

Nice to see you here again! Hope you will join in more often!

:D

Boxcab E50

[ak-milw]

They did have SD7's! graemlins/220.gif

[Cthetrains]

ok..a Scribbins book with an error?..ok, flukes exist..as for the difference between GP-7's and GP-9's...outwardly..none....just horsepower and maybe heavier bearings...I spent 2 weeks on that question back in my younger years..(maybe 6 or 7 years ago)

[Flash Blackman]

Originally posted by John Moore:
To add to Flash's comments the GP-7 was the road switcher version of the F-7 at the same horsepower, 1500, while the GP-9 was the road switcher version of the F-9 at 1750 horsepower.
On the GN the GP-7 was rated at 1150 tons at 15 mph while the GP-9 was rated for 1350 at 15 mph. Both on a 1% grade. Both could be dynamic or non dynamic brake equipped, and both could be equipped with steam generators for passenger service. Passenger versions of both would usually have the airtanks roof mounted to make room for a larger split tank to carry water for the steam generator, what has been referred to as the torpedo tube version. On my road the 7s had three vents below the cab walkway while the 9 had only one.

Also to add there were a few GP-9ms that were built from components from traded in FTs and were only rated at 1350 horsepower and were virtually indistinguishable from the regular GP-9s. http://www.trainboard.com/cgi-bin/ultimatebb.cgi/ubb/get_topic/f/13/t/002000.html?#000002

[BoxcabE50]

Cory-

Actually there are a couple of tiny spotting features. Differences between GP7,a nd GP9.

The fastest is their battery box doors. On a GP7, there are three sets of louvers. On a GP9, there is either one set, or none.

Also, the GP9 lacks some small louvers back near the radiators, which are found on a GP7.

Otherwise, they're twins.

:D

Boxcab E50

[Cthetrains]

ya..I should start checking my books before answering these..but you have to admit..going past you at 30 mph, there are no differences

LoL