PHASE INFORMATION ELECTROMOTIVE DIV of GM

All model information given refers to "HO" scale, I have no info on other scales...

FT UNITS

    FT's were built between October 1939 and November 1945.
    There were 555 "A" units and 541 "B" units .
    These were equipped with 1350 HP 567 & 567a prime movers.
    The FT was produced with and without Dynamic brakes. There are no Phases, the only difference being the shape of the dynamic brake housings. The FTa had 4 portholes on side, small combination class lights/3 number numberboards with an option of 4 digit numberboards. There was a row of vents/intakes along the top with screened covers which ran from the door to end of the body. The FTb also had 4 portholes with an option for a 5th porthole. This allowed visibility for the hostler to move the units around the yard. The FTb also came in a short version. The exhaust fans were flat circular screened openings, two in front and two in rear of top panel. There was a small(lip)overhang at the top rear of the roof.
    Phase I DB housing..straight sides, 2 screened openings.
    Phase II DB housing..curved sides, 2 screened openings.
    Phase III DB housing..straight sides, 4 screened openings.
    Although the FT looks similar to the subsequent "F" units there are differences. The truck centers on the "A" units are 27'-03" and 26'-06" on the "B" unit. The remainder, F2 thru F9 had 30'-00" truck centers.
    Plans can be found in the Model Railroader Cyclopedia, Vol 2 on page 89.
    A great reference book is by Diesel Era "the Revolutionary Diesel EMC's FT". Edited by Warren Calloway has rosters for all FT's including builders numbers, dates etc.
    Stewart Hobbies Inc. PO Box 341, Chalfont, Pa. produces a FTa and FTb model. All 3 DB housings are included in the kits. The "B" unit with the 5th porthole is available and is included with those roads that had this option. These were introduced in 1996 and are still available.

F2 UNITS

    F2's were built between July 1946 and November 1946.
    There were 74 "A" units and 30 "B" units.
    These were equipped with 1350 HP 567b prime movers.
    The F2 followed the FT with a different(longer)body and all were alike. There was a row of vents and intakes along the top with screened openings similar to the FT. There was a gap in the screened opening near the rear of the body. There were only 3 portholes along the side and these kept the glassed windows. The exhaust fans were enclosed in raised circular housings and all were grouped in the center of the top panel. The dynamic brakes were housed in the body with two flat screened openings on the top behind the cab and ahead of the fans.
    All were delivered with small combination numberboards/class lights. There was a small(lip)overhang at the top rear of the roof.
    Plans can be found in the Model Railroader Cyclopedia, Vol 2 on page 92. This plan is for the F3 Phase I which is the same as the F2 units.
    Stewart Hobbies Inc. PO Box 341, Chalfont, Pa. produces the F3a,b Phase I. These were introduced in 1998 and are still available.
    Life-Like(P1K), 1600 Union Ave, Baltimore, Md. produces a F3a,b Phase I. These were introduced in 1999 and are still available.

F3 UNITS

    F3's were built between July 1945 and February 1949.
    There were 1111 "A" units and 696 "B" units .
    These were equipped with 1500 HP 567b prime movers. All phases had the dynamic brake fans inside the body with two rectangular openings just behind the cab for cooling air. These openings were flush with the body and can only be seen from the top. This spotting feature is a good way to tell as delivered F3's from the later F7's which had round cooling fans above top of the body. There was a small(lip)overhang at the top rear of the roof.
    Phase I..January 1945 to June 1947 Same as a F2..small combination numberboards/class lights; 3 portholes and no filters in the middle side course; tall fans; chicken wire screening in three pieces on the upper side course.
    Phase II..June 1947 to June 1948 large numberboards; tall fans/countersunk low fans optional; two portholes, center porthole eliminated and substituted with four horizontally slotted air filters between them; larger openings at the rear of the upper course; chicken wire screening covering the upper course and the entire area between the portholes in the middle course.
    Phase III..June 1948 to February 1949 large numberboards; Countersunk fans with grill type openings;two portholes with four horizontally slotted air filters sets between them;chicken wire covering the entire upper course only.
    Phase IV..August 1948 to February 1949 same as Phase III with a fabricated horizontal stainless steel grill covering the upper course; two portholes with four horizontally slotted air filters sets between them; These were equipped with F7 traction motors and are sometimes referred to as F5's.
    Plans for the Phase I can be found in the Model Railroader Cyclopedia, Vol 2 on page 89.
    Plans for the Phase lI can be found in Railroad Model Craftsman, Sept 70, pg. 28 & 29.
    Stewart Hobbies Inc. PO Box 341, Chalfont, Pa. produces the F3a,b Phase I. F3a,b Phase II early/late, F3a,b Phase III and Phase IV. These were introduced in 1998 and are still available.
    Life-Like(P1K), 1600 Union Ave, Baltimore, Md. produces a F3a,b Phase I. These were introduced in 1999 and are still available.
    Athearn, 19010 Laurel Park Road, Compton, Ca. produces a F7 can be used to model the Phase IV/F5's. These were introduced long ago and are still available.

F7 UNITS

    F7's were built between February 1949 and December 1953.
    There were 2366 "A" units and 1483 "B" units .
    These were equipped with 1500 HP 567b prime movers.
    Phase I..Horizontal Stainless grills along top; countersunk low fans; two portholes with four horizontally slotted air filters sets between them; similar to the F3 Phase IV/F5 except the dynamic brake fan, if so equipped, was a 36" diameter countersunk low fan. The small(lip)overhang at the top rear of the roof continued on these models.
    Phase II- Vertical stainless steel grill along top; two portholes with four horizontally slotted air filters sets between them; dynamic brake fan, if so equipped, was a 48" diameter countersunk low fan. The small(lip)overhang at the top rear of the roof was eliminated.
    Stewart Hobbies Inc. PO Box 341, Chalfont, Pa. produces the F7 Phase I and II. These were introduced in 1991 & 1992 and are still available.
    Athearn, 19010 Laurel Park Road, Compton, Ca. produces a F7a,b Phase I. These are still available as of this date 06/15/2000.

F9 UNITS

    F9's were built between January 1954 and May 1960.
    There were 87 "A" units and 154 "B" units .
    These were equipped with 1750 HP 567c prime movers.
    The F9's were all the same..A stamped(Farr-Air grille)of vertical stainless steel slots replaced the fabricated grill along top; four pair of sets of vertical louvers between two portholes. The front porthole was moved back and an additional paired set of vertical louvers was added ahead of this porthole and the cab door. No rear overhang. 48" DB fan.
    Stewart Hobbies Inc. PO Box 341, Chalfont, Pa. produces the F9a,b. These were introduced in 1991 and are still available as of this date.

FP-7UNITS

    FP-7's were built between June 1949 and December 1953.
    There were 372 "A" units and 0 "B" units .
    These were equipped with 1500 HP 567b prime movers.
    The FP-7's were all the same..A fabricated stainless steel grill along the top; four pair of sets of horizontal louvers between two portholes. The body was lenghtened 4' to accomodate the steam generator equipment. 48" DB fan. The truck centers was 34'-00".
    Atlas/Roco used to produce an FP-7. These were introduced in 1978 and upgraded in 1990 can still be found at dealers, undec bodies are also available.

FP-9 UNITS

    FP-9's were built between January 1954 and December 1959.
    There were 83 "A" units and 0 "B" units .
    These were equipped with 1750 HP 567c prime movers.
    The FP-9's were all the same..A stamped(Farr-Air grille)of vertical stainless steel slots replaced the fabricated grill along top; four pair of sets of vertical louvers between two portholes. The body was lenghtened 4' to accomodate the steam generator equipment. 48" DB fan. The truck centers was 34'-00". The only US units were the C&NW, no Southeastern roads bought these new.
    No manufacturer nakes a FP-9. Can be kitbashed from an Atlas FP-7.

GP-7's

    GP-7's were built between October 1949 and May 1954.
    There were 2724 GP-7's units and 5 GP7b units .
    These were equipped with 1500 HP 567b prime movers.
    All GP-7 Phases were built with High noses.
    Phase I..October 1949 to November 1950..There are seven 86" engine room doors on non-db units and seven short doors. One 86" door and thirteen short doors on db equipped units. There are three sets of louvers under the cab. There are two pair of 36" cooling fans on the roof. DB equipped units have 36" fans. Solid skirts at the fuel tanks. Sloped plates on pilots with slots for the mu hoses. Bolted stanchions. The rear air intakes had chicken wire over the openings.
    Phase II..June 1950 to March 1953..Same as Phase I with the addition of a box on walkway behind the cab(on long end). Slotted skirts at the fuel tanks on units with 1200g or larger after March 1952. Dynamic brake equipped units have 48" fan after August 1952. Sloped plates on pilots discontinued after mid 1952. Bolted Stanchions.
    Phase III..March 1953 to May 1954.. Same as Phase II except all seven engine room doors are 82" with or without DB. Pressed stanchions.
    Plans can be found in the Model Railroader Cyclopedia, Vol 2 on page 112.
    Life-Like(P2K), 1600 Union Ave, Baltimore, Md. produces a GP-7 Phase II. These were introduced in 1998 and are still available.
    Atlas Tool Co, Hillside, NJ. produces a GP-7 phase I. These were introduced in 1990 and are still available. Original models were made by Kato in Japan, are now made in China under the Classic name.
    Athearn makes a "GP-9" which has the features of a GP-7, the body molding dates to the 1960's when the motors were wide resulting in a wider(6" scale inches) body. The chassis and trucks were reworked in 1984 resulting in a narrower motor and sideframes which have become the DE-facto standard for "Blomberg M" trucks. As with most Athearn models is still available today 06/15/2000.

GP-9's

    GP-9's were built between January 1954 and December 1959 (August 1963 in Canada).
    There were 4092 GP-9's units and 165 GP-9b units.
    These were equipped with 1750 HP 567c prime movers. All GP-9 Phase I & II were built with High noses.
    Phase I..January 1954 to January 1955..There are seven 82" engine room doors with or without DB. There are only one set of louvers under the cab. There are two pair of 36" cooling fans on the roof. DB equipped units have 48" fans. Solid skirts at the fuel tanks. Pressed Stanchions. Straight pilots sheets.
    Phase II..June 1950 to March 1953..Same as Phase I with slotted skirts at the fuel tanks on units with 1200g or larger. Fuel filler moved forward after February 1957.
    Phase III..March 1953 to December 1959.. Similar to Phase II except only two 48" cooling fans and a 48" dynamic brake fan. Skirt at fuel tank is now cut-away. The first unit delivered with a low-nose was Phelps-Dodge #38, built in 1955. Southern Pacific #5872-5891 were also delivered in 1959 with low-noses. All other GP-9's Phase III were delivered with high-noses.
    Life-Like(P2K), 1600 Union Ave, Baltimore, Md. produces a GP-9, Phase II. These were introduced in 1998 and are still available.
    Front Range Products, 1341 Sherman Drive, Longmont Co. produced a GP-9, phase 2, model was introduced in 1987, good body but difficult to find today.

GP-18's

    GP-18's were built between November 1959 and November 1963.
    There were 388 GP-18's units and 0 GP18b units .
    These were equipped with 1800 HP 567d1 prime movers.
    Phase I..November 1959 to January 1962..There are seven 82" engine room doors with or without DB and seven short doors. There are two sets of louvers on the battery box ahead of the cab. There are two 48" cooling fans on the roof. DB equipped units have 48" fans. A thinner skirt at the fuel tanks. Air tanks mounted crosswise behind the fuel tanks. Pilots have boxes with slots for the mu hoses. Bolted stanchions. The rear air intakes had metal grids over the openings.
    Phase Ia..March 1960 to March 1962..Same as Phase I with a larger fuel tank for the C&NW and MP. The air tanks were moved above the fuel tanks resulting in a narrowed walkway side with 5 oval cutouts above the air tank.
    Phase II..January 1962 to November 1963.. Same as Phase Ia except the frame above the air tanks was narrowed and the slots eliminated. After May 1962 the "Pan top" fans were replaced with the "flat top" fans.
    Plans can be found in the Model Railroader Cyclopedia, Vol 2 on page 128.
    A great reference book is by Diesel Era "EMD's GP-18". Edited by Warren Calloway has rosters for all GP-18's including builders numbers, dates etc.
    Life-Like(P2K), 1600 Union Ave, Baltimore, Md. produces a GP-18 Phase I in both high-nose and low-nose. These were introduced in 1992 but are scarce today.

EMD GP-20's

    GP-20's were built between November 1959 and April 1962. This listing does not include the GP-9 Units modified by the UP.
    There were 260 GP-20's units and 0 GP-20b units.
    These were equipped with 2000 HP 567d2 prime movers.
    There were no phases, all shared the same basic body as the Phase Ia GP-18's.
    214 GP-20's were delivered with high-noses and 46 with low-noses. Only 15 delivered to the NYC lacked DB. Southeastern roads didn't order any GP-20's, N&W had a couple they inherited from the IT.
    Life-Like(P2K), 1600 Union Ave, Baltimore, Md. produces a GP-20 low nose. These were introduced in 1998 and are still available.

More EMD Information
S.A. McCall