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Grumman unbuilt pre-1945 fighter designs

Antonio

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I'd like to see drawings from the following model numbers

G-25 Navy High Altitude fighter with two V-1710
G-29 two seat Navy fighter with pusher V-1710
G-30 two seat Navy fighter with V-1710
(Probable design date for all three should be between 1936 and 1938. Since USN preference was for radial engines, that projects look very interesting, specially that twin high altitude fighter...perhaps a Grumman "P-38 equivalent". Who knows)

WWII era designs

G-57 naval fighter with P&W R-2800 and turbojet
G-59 F6F development with R-4360
G-60 F6F development with R-4360 and supercharger
G-61 F6F development with an auxiliary GE jet
G-62 Small jet fighter
G-67 Proposed F7F-2 with an I-20 turbojet behind the R-2800 nacelles
G-68 Proposed Navy Fighter with a TG-100 propeller turbine

G-62 should have been Grumman's first all jet design, preceding the G-71 which can be seen at American Secret Projects Pg 31)
G-57 and G-68 sound as ancestors of G-79A and B respectively. See American Secret Projects Pg 34)
G-67 is very interesting for me because it's a kind of link between the F7F and the G-75 (See American Secret Projects Pg 32)

Any help will be very welcome. Thanks in advance.

Source: Information from Gruman Aircraft since 1929. René J Francillon Ed Putnam received from Lark
 

Tailspin Turtle

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As you wish ( More on Design 67 sent directly but your email addresses didn't work)

Note that both the Design 29 and 30 are described as single seaters.

I only have a written description of the Design 25: The airplane is a twin-engine monoplane of all metal construction. It is powered with two Allison 1710 liquid-cooled engines, developing a total of 2,000 horsepower and driving three-blade tractor propellers of the controllable type thru extension shafting. The engines are housed in nacelles, which extend aft to support the tail surfaces. A fin and rudder on each nacelle provides a twin tail to take full advantage of the separate slipstreams. The pilot is located in the fuselage forward of the wing. The landing gear is of the "tricycle" type and is completely retractable. Landing flaps are provided and the wings fold to reduce the space required for stowage. The arresting hook attaches to the rear end of the fuselage, which terminates a short distance aft of the wing.

It sounds a lot like a P-38...
 

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VictorXL188

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Based on the description of the Model 25, and also the general layout of the Model 29, I've come up with this as a possible look to the Model 25 using P-38 components for the Allison V-1710s etc. It's a bit rough I'm afraid!
Grumman Design 25.jpg
 

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