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Ag Cat
G164B AgCat.jpg
Ag Cat G-164B
Role Agricultural aircraft
Manufacturer Grumman
First flight 1957[1]
Introduction 1957[1]
Schweizer Ag Cat B
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]


An Ag Cat set up for wingwalking
Grumman G-164A Ag Cat
G-164 Ag-Cat
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[edit]

Specifications (G-164B Super B Turbine)[edit]

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

General characteristics


See also[edit]

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". 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[edit]

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Grumman_Ag_Cat — Please support Wikipedia.
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17 news items

Columbus Telegram
Thu, 04 Sep 2014 17:26:06 -0700

The company specializes in the Grumman Ag Cat, an ag aerial spray plane that got its start in the 1950s. Storm's long-range goal is to build the plane in David City, he said, but until then he said the company would continue to be involved in building ...
Australian Flying
Sun, 31 Aug 2014 22:36:49 -0700

... Geelong Harley Davidson in conjunction with the EJ Whitten Foundation, and attracted an estimated 700 motorcycles to Lethbridge, where many riders paid $20 for a one-circuit joyflight in aircraft including an Antonov AN-2, Nanchang and Grumman Ag ...
Albany Democrat Herald
Thu, 10 May 2012 09:51:17 -0700

Wooldridge, who said his 1978 Grumman Ag Cat was not insured, has two other planes, including a crop duster. The Ag Cat was moved to a nearby hangar Thursday afternoon. No total damage estimate had been made. The engine appeared to be OK, ...


Wed, 26 Mar 2014 10:11:57 -0700

Owner and pilot, Hallett Griffin, said although he also had one of his Grumman Ag-Cat spraying airplanes on display, people were more interested in the Hupmobile. "Back in the 1920s, when the Hupmobile was released, most of them went to South Island ...
The Roundup
Tue, 27 Aug 2013 09:41:15 -0700

Also returning for a thrilling performance are Gene Soucy flying his Grumman Ag Cat and wing walker Teresa Stokes. New performers include Jeff Boerboon in his Extra 300 and Skip Stewart flying his Pitts Special. “All these performers are fantastic ...
Thu, 10 May 2012 13:00:21 -0700

The Linn County Sheriff's Office said the pilot, Kent Woolridge, 68, had landed the Grumman Ag Cat biplane at about 8:15 a.m. but when he applied the brakes, one malfunctioned and the plane ended up on its nose in a blackberry patch. The plane's ...
Casper Star-Tribune Online
Thu, 19 Aug 2010 23:06:22 -0700

POWELL -- Sounding like a diving World War II Grumman Hellcat determined to strafe an enemy position, the crop duster dives from the sky. In his Grumman Ag-Cat, Orville Moore is pursuing enemies, but those adversaries are invasive weeds and insects ...
Albany Democrat Herald
Wed, 16 Jun 2010 16:01:11 -0700

He has taken his Grumman Ag-Cat up frequently since February. “It's been about three times what it usually is,” Woolridge said. “We're just at the end of it for wheat and starting to spray grass seed.” Wheat farmers in particular have gone to the ...

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