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Reply to "Difference between the F7 and the F9?"

Another F9 difference from the F7 is the front porthole.   It is moved about 1/2, toward the rear I think, on the F9.    The 48 inch dynamic brake fan is a big difference as mentioned and the I think the side grills may be different than a typical F7.

I did an opposite conversion in the 90s.   I had some of the Old Atlas Roco F9s and and Pennsy did not have F9s, so I wanted to convert them to F7s.     I ignored the fan because the amount of body work was too much for me.   I think replacing the 36 inch fan with a 48 inch would be much easier.   You would not need to worry about the area beneath the fan.    Going from 48 to 36, I would have had to get very nice body work in the area where I removed the fan.

The Roco units had steam generator stuff on the rear roof panel, and I filed and sanded all that off.    I also removed the 5th vent with sanding etc.    And I drilled out a new porthole window in the right location for the F7.    I cut off the old porthole frame and then made a patch panel from very think styrene that fit exactly between the rivet strips vertically and horizontally where the old portal was located.   finally Keil LIne, Now Scale City Designs, had a cast porthole window frames for F units which I purchased and in stalled.  

Those old rocos had cast on handrails and grabs and gigantic coupler openings.     I cut off all the cast on grabs and replaced them with fabricated wire ones.    I cut off the pilots and put pennsy style pilots on the units.   I also put antennas on them for PRR Trainphone.

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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