Grumman/Gulfstream Projects

[hesham]

Hi,

here is a Grumman/Gulfstream G.II Projects,the first had lift fan as V/STOL aircraft and the second
had a supercritical wing.

[R] LIFT FAN & SUPERCRITICAL WING GII

Back in the sixties and seventies there was much discussion on aircraft capable of rising vertically or operating from STOL (Short Take-Off and Landing) ports; of cruising at sonic speeds and supersonic speeds. Grumman was active in many projects with an eye toward future civil products. NASA...

gulfbiz.jimdo.com

 

[hesham]

From, Gulfstream a tribute to the ultimate biz-jet, 1958-1991.

 

[hesham]

Hi

Flying Magazine

books.google.com.au

 

[Apophenia]

Source (for the image above): General Electric's Executive Turbines; by Robert I. Stanfield, Flying Magazine, May 1961, Vol. 68, No. 5, pp 36-38 and pg 68.

Note that this was not a Grumman design. Rather, this illustration - like the other examples in the linked article - are of GE's notional installations of their new turbine engines on existing (or then soon-to-be-realized) airframes.

What the article actually says is:

Grumman's Gulfstream. Still in the planning stage, the sleek turboprop would be adaptable for four CF700B aft turbofans; would probably carry wing-mounted pods of twin. While the fuselage would be retained, the wing could embrace a new configuration involving a moderate sweep, resulting in 500-mph-plus speeds

In other words, GE was looking for potential applications for its 2,850 lbf CJ610-1 and CJ610-2B turbojets ('civilianized' J85 variants) as well as the 4,200 lbf CF700-2B (an aft-fan turbofan based on a J85 core).