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Grumman Ag Cat

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Ag Cat

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First flight

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Schweizer Ag Cat B
File:G164A on Floats.jpg
G164A on Floats

The Grumman G-164 Ag Cat is a single-engine biplane agricultural aircraft, developed by Grumman in the 1950s.


The Ag Cat was the first aircraft specifically designed by a major aircraft company for agricultural aviation.[2]

In 1955, Grumman preliminary design engineers Joe Lippert and Arthur Koch proposed the design for a "purpose built" crop dusting airplane as a means of fulfilling a pressing need in the agricultural community as well as the perceived need for Grumman to diversify its product lines. The first G-164, which was built by Grumman, accomplished its maiden flight on May 27, 1957 with Grumman test pilot Hank Kurt at the controls.[2][3]

At this time, the Grumman G-164 did not have a name. Leroy Grumman suggested "The Grasshopper." However, Dick Reade suggested "Ag-Cat," following Grumman's naming tradition using the suffix "-Cat" in aircraft names (e.g., F4F Wildcat and F6F Hellcat). Mr. Grumman agreed and the Grumman G-164 became the "Ag-Cat." [3]

Large military orders prevented the production of the Ag-Cat at Grumman's Bethpage facility. Grumman's Board of Directors chose to subcontract the entire program to the Schweizer Aircraft Company of Elmira, New York. Initial production was through a contract between Schweizer Aircraft Corporation,[4] and Grumman. The first Schweizer-built Ag-Cat, bearing registration number N10200 flew on October 17, 1958 under the control of Schweizer test pilot Clyde Cook.[3] Full production began in January 1959 with Schweizer delivering 12 FAA certified airplanes to Grumman by March 1959. The FAA granted type certification on January 20, 1959.[5]

The ownership of the Ag-Cat design has changed hands several times. Grumman transferred ownership to its commercial aircraft subsidiary, Grumman American, in 1973. The Grumman American subsidiary, which also owned the Grumman Gulfstream design series, was sold to American Jet Industries in 1978. From initial production through 1981, Schweizer built 2,455 aircraft under contract.[6] In 1981 Schweizer bought the rights to the design and continued production under the name Schweizer Ag-Cat.[4]

Schweizer sold the design to Ag-Cat Corp. of Malden, Missouri in 1995. That company entered banktruptcy and no aircraft were produced.[citation needed]

In February 2001 the design was sold to Allied Ag-Cat Productions Inc. of Walnut Ridge, Arkansas.[5] Allied Ag-Cat are not producing new aircraft although a related company operates a large fleet of Ag-Cats.

The basic airframe incorporates many safety innovations, including a pressurized cockpit to keep pesticides out, air conditioning and a fuselage structure that is designed to progressively collapse in the event of a collision.[4]

Floats were approved for the aircraft in the early 1990s in Australia.[citation needed]


File:Grumman G-164 Ag-Cat - Góraszka.jpg
An Ag Cat set up for wingwalking
Ag Cat
The basic model Ag Cat was certified with four different engines: the 220-225 hp (164-168 kW) Continental Motors radial engine, the 240 hp (179 kW) Gulf Coast W-670-240 radial engine, the 245 hp (183 kW) Jacobs L-4M or L-4MB radial engine and the 275-300 hp (205-224 kW) Jacobs R-755 radial engine. A total of 400 of this model were produced.[6]
Super Ag Cat A/450
The G-164A became the main model starting with serial number 401. This model featured a 450 hp (335 kW) Pratt & Whitney R-985 radial engine along with a higher gross weight, increased fuel capacity, larger diameter wheels and improved brakes.[6]
Super Ag Cat A/600
The A/600 incorporated the same improvements embodied in the A/400, but was powered by a Pratt & Whitney R-1340 radial engine of 600 hp (450 kW).[6]
Super Ag Cat B/450
The B/450 improved on the "A" model by increasing the wingspan from 35 ft 11 in (10.95 m) to 42 ft 3 in (12.88 m). The fin and rudder were enlarged and the fuselage was also lengthened.[6] The upper wing was raised on the "B" model by 8 in (20 cm) do reduce aerodynamic interference between the wings and improve cockpit visibility.[4]
Super Ag Cat B/525
The B/525 incorporated the design improvements of the B/450, but was powered by a Continental /Page R-975 engine.[6]
Super Ag Cat C/600
The C/600 first flew in 1976. It is similar to the model B/450 but has its fuselage further stretched to incorporate a 500 US gal (1,892 l) agricultural hopper. The model is powered by a 600 hp (450 kW) Pratt & Whitney R-1340 radial engine.[6]
Turbo Ag Cat D/T
The "D" model is similar to the C/600 but replaced the radial piston engine with a Pratt & Whitney PT6A turboprop powerplant of 680 shp (507 kW).[6]
Turbo Ag Cat D/ST
The D/ST model is identical to the Turbo Ag Cat D/T, but the engine was a Pratt & Whitney PT6A turboprop powerplant of 750 shp (559 kW).[6]
Turbo Ag Cat D/SST
The D/SST model is identical to the Turbo Ag Cat D/T, but is powered by a Pratt & Whitney PT6A turboprop powerplant of 850 shp (634 kW).[6]
Ag Cat B-Plus/600
Introduced in 1982 the B-Plus/600 is powered by a Pratt & Whitney R-1340 of 600 hp (450 kW). It has the larger hopper of the "C" model.[6]
Ag Cat B-Plus/450
Also made available for the first time in 1982 the lowered powered B-Plus/450 is powered by a Pratt & Whitney R-985 of 450 hp (335 kW). This model was available only as a custom order.[6]
Marsh G-164 C-T Turbo Cat
This aftermarket conversion was created by re-engining the Super Ag Cat C/600 with a Garrett TPE331-1-101 turboprop, de-rated to 600 hp (450 kW).[6]
Mid-Continent King Cat
This aftermarket conversion of the Super Ag Cat C/600 replaced the 600 hp (450 kW) Pratt & Whitney R-1340 engine with a Wright R-1820-202A radial engine that produces 1,200 hp (895 kW).[6]
Ethiopian Airlines Eshet
License-built Ag-Cat Super B Turbine with local content from 1986.[7]

Aircraft on display

Specifications (G-164B Super B Turbine)

Data from Jane's Civil and Military Aircraft Upgrades 1994–95[8]

General characteristics


See also

Aircraft of comparable role, configuration and era

Related lists


  1. ^ a b Wood, Derek: Jane's World Aircraft recognition Handbook, page 460. Jane's Publishing, 1983. ISBN 0-7106-0202-2
  2. ^ a b c Smithsonian National Air and Space Museum (n.d.). "Grumman C-164 Ag-Cat". Retrieved 12 May 2010. 
  3. ^ a b c Schweizer, William: The Ageless Ag-Cat: The Forty-year History of the Ag-Cat Agricultural Airplane, Rivilo Books, 1995 ISBN 0-9630731-1-7
  4. ^ a b c d Montgomery, MR & Gerald Foster: A Field Guide to Airplanes - Second Edition, page 14. Houghton Mifflin Publishing, 1992. ISBN 0-7232-3697-6
  5. ^ a b Federal Aviation Administration (February 2001). "Type Certificate Data Sheet No. 1A16" (PDF). Retrieved 1 January 2011. 
  6. ^ a b c d e f g h i j k l m n Taylor John WR: Jane's Pocket Book Light Aircraft - Second Edition, page 215. Jane's Publishing Company, 1982. ISBN 0-7106-0195-6
  7. ^ Lambert 1994, p. 70
  8. ^ Michell 1994, pp. 398–399.
  • Lambert, Mark, ed. (1994). Jane's All the World's Aircraft 1994-95. Coulsdon, Surrey, United Kingdom: Jane's Information Group. ISBN 0-7106-1160-9. 
  • Michell, Simon. Jane's Civil and Military Aircraft Upgrades 1994-95. Coulsdon, UK:Jane's Information Group, 1994. ISBN 0-7106-1208-7.

External links