External difference between F3 and F7?

Discussion in 'F7' started by friscomike, Apr 25, 2017.

  1. friscomike

    friscomike Administrator Staff Member Administrator Frisco.org Supporter

    Howdy,

    What were the external differences between the Frisco's F3's and F7's besides the grill on the sides? I have to complete sets of F3 and want to convert them to F7's for use in the TWMRC's Frisco operations.

    Happy rails,
    Mike Corley
     
  2. meteor910

    meteor910 2009 Engineer of the Year Staff Member Frisco.org Supporter

    Mike -
    The easiest way to answer your request would be to obtain a copy of the October, 2006 issue of Model Railroader. There is an excellent article in there, "Modeler's Guide to F-Units", which is well illustrated. Any chance you can get your hands on a copy of that issue?

    There also is a great article in the January, 1970 issue of Extra 2200 South, "All About F's", but that one understandably will be harder to obtain.

    Briefly, stay away from trying to modify SLSF 5000 and 5001, they were unique on the Frisco, Phase 2 F3's. Their side was largely covered with chicken wire. The rest of the F3's, SLSF 5002-5017, were Phase 3 units. They had low fans, like the F7's, had a completely different d/b set up than the F7's (but no worry, SLSF did not have d/b's on the F3's or the F7's), and had a chicken wire grill along the top openings on the body sides. The F7's had a fabricated Farr horizontal side grill covering those top side openings. Take a look at pics of Frisco F3's and F7's to easily see the difference. Internally, they both had 1500 HP 567B engines, but the later F7's had 1500 HP 567C's. The F7 fabricated grill is available as a part from, I think, either Details West or Detail Associates.

    Simply changing the side grills will make an F7 "looker" out of a F3, as long as there is no d/b. There are several other detail differences, but few will notice. Best thing to do is look at pics of the two units and make the changes you see.

    These comments apply to A-units. Will you be doing any B's? As long as the F3 is low fans, the side grill will be the main difference. Again, there are some other little differences.

    Ken
     
  3. friscomike

    friscomike Administrator Staff Member Administrator Frisco.org Supporter

    Thanks Ken, your comments are very helpful. I have access to all the magazines at the Texas Western and will check them out! I haven't delved into Frisco diesels so my knowledge about them is thin.

    I will be doing B's. The photos I have of F7's in Fort Worth show full sets ABBA. The F3's I have are all Athearns, so I will check the differences in photos.

    Mike C
     
  4. TAG1014

    TAG1014 Frisco.org Supporter Frisco.org Supporter

    Ken--Does that issue of Extra 2200 South have an issue number, like #117, #121 etc? So it might be easier to track it down.

    Thanks,
    Tom G.
     
    Last edited: Apr 26, 2017
  5. meteor910

    meteor910 2009 Engineer of the Year Staff Member Frisco.org Supporter

    Tom, Mike -
    The January, 1970 issue of Extra 2200 South was issue Number 20. The article "All About F's" is on pages 19-21.
    Ken

    ps - There also was a roster of KCS diesel power (as of 1970!) on pages 25-27, plus a technical article on page 28 on "Wheel Slip Detection". The early issues of X2200S (those done by the Dovers in Cincinnati, OH) were a great resource, much missed.
     
    Last edited: Apr 26, 2017
  6. TAG1014

    TAG1014 Frisco.org Supporter Frisco.org Supporter

    Thanks Ken!

    TG

    Edit/PS: Too bad subscribing to 2200 South was such an ordeal. The issues were SO irregular, back when I subscribed I was a young working fellow and moved several times. I forget how the mail forwarding system worked then, but it seemed like it was a real tussle for any continuity to try to build a collection of Extra 2200. After I gave up trying to subscribe, once in a while, I could find single copies at a hobby shop. Too bad White River Productions wasn't around to restore order to Extra 2200 South. I'd love to have a complete run of X2200!

    TG

    Extra Edit: It would be really nice if those early X2200S issues could be reprinted and included in some kind of a large volume. Seems like there would be a some interest from modelers and railfans perhaps in subscribing to such a project
     
    Last edited: Apr 30, 2017
  7. meteor910

    meteor910 2009 Engineer of the Year Staff Member Frisco.org Supporter

    I had a complete set, but after the Dovers quit publishing it, it seemed X2200S turned into just a locomotive picture magazine, with very few of the meaty detail articles I loved, such as "All About F's", and frequent locomotive rosters. The Dovers (I met the Mr when we lived in Cincinnati, 1974-1977 in a hobby shop) were very particular about the magazine, and had some very qualified assistant editors. Prior to our recent move to Florida, I sold all the issues except for the original ones edited by the Dovers, which I kept. X2200S is no longer published as far as I know.

    K
     
    Last edited: Apr 28, 2017
  8. friscomike

    friscomike Administrator Staff Member Administrator Frisco.org Supporter

    Thanks for the replies Ken. Your help was spot on!

    Mike C
     
  9. TAG1014

    TAG1014 Frisco.org Supporter Frisco.org Supporter

    I was lucky enough to come up with a copy of the October 2006 Model Railroader with the F-Unit feature that Ken Wulfert recommended. The F-Unit article is great reference to have all that information in one place. But it was kinda disheartening to see how far Model Railroader has slipped. The '06 magazine has 124 pages, while the current issue (June '17) only has 84 pages. The '06 mag is chock full of articles and information while the '17 issue is, well, just thin. It looks like there would be just about as much model railroading information, products, photos and layout ideas today as there was in 2006. Model Railroader now is a pretty poor third to RMC and N Scale Railroading. Just my opinion...

    Tom G.
     
    Last edited: May 2, 2017

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