Grumman Turbine Series for Sale — Buy or Sell a Grumman Gulfstream I or Turbine Ag Cat Worldwide
The Grumman Turbine Series encompasses a distinguished family of aircraft from one of America's most celebrated aerospace manufacturers — including the executive and commuter workhorse Grumman Gulfstream I, the agricultural powerhouse Grumman Ag Cat in its turbine-converted variants, and the compact utility Grumman Mallard amphibian. Grumman's reputation for engineering excellence — forged in the heat of wartime aircraft production and naval aviation — carried through to these commercial designs, producing aircraft of exceptional structural integrity, robust handling, and outstanding service longevity. Grumman Turbine aircraft for sale attract buyers who recognise the lasting value of Grumman's engineering heritage, and Airplane Trade is the best marketplace to find and list them worldwide.
The Grumman Gulfstream I — Pioneer of Business Aviation
The Grumman G-159 Gulfstream I holds a unique place in business aviation history as the aircraft that effectively defined the large-cabin executive turboprop category. First flown in August 1958, the Gulfstream I was powered by two Rolls-Royce Dart turboprop engines and could carry up to 24 passengers in airline configuration or 10–14 passengers in luxury business trim. More than 200 Gulfstream I aircraft were built between 1959 and 1969, serving corporate flight departments, the US military (as the VC-4A and TC-4C), and regional commuter airlines. Many Gulfstream I aircraft entered the commuter airline market in the 1970s and 1980s after their corporate careers ended, and a number of survivors remain airworthy today as historic aircraft and executive transports. The Gulfstream I's broad cabin, outstanding range (over 2,000 nm), and the refined Dart turboprop engine's smooth, quiet operation set the standard against which all subsequent business turboprops were measured.
Grumman Ag Cat Turbine
The Grumman Ag Cat is one of the most iconic and effective agricultural aircraft ever produced. Originally powered by Pratt & Whitney R-985 or R-1340 radial piston engines, the Ag Cat has been widely converted to turbine power — most commonly using the Pratt & Whitney Canada PT6A-34AG or PT6A-15AG turboprop engine. The turbine conversion transforms the Ag Cat's performance dramatically: faster ferry speeds, better climb rates for efficient reloading cycles, greater reliability, and the ability to operate on Jet-A rather than increasingly scarce aviation gasoline. Turbine Ag Cats are highly valued in the agricultural aviation market for their large hopper capacity, excellent spray pattern, and the mechanical simplicity that makes them easy to maintain and operate in remote agricultural environments.
Grumman Mallard
The Grumman G-73 Mallard is a twin-engine amphibious flying boat produced between 1946 and 1951 that has become one of the most sought-after vintage amphibians on the market. Originally powered by Pratt & Whitney R-1340 Wasp radial engines, most surviving Mallards have been converted to turbine power using Pratt & Whitney Canada PT6A-27 or PT6A-34 engines. The turbine Mallard offers 10-seat amphibious capability with excellent range and the safety of twin turboprop power, making it ideal for island resort transport, seaplane tour operations, and serious private amphibian travel. Turbine Mallards are exceptionally rare and command premium prices at auction and private sale.
Performance — Grumman Gulfstream I
- Engines — Two Rolls-Royce Dart Mk 529-8X, 2,190 ehp each
- Maximum Speed — 348 mph (302 knots / 560 km/h)
- Cruise Speed — 316 mph (275 knots / 509 km/h)
- Range — 2,540 miles (4,088 km) with full fuel
- Service Ceiling — 30,000 ft (9,144 m)
- Rate of Climb — 1,900 ft/min (sea level, MTOW)
- MTOW — 35,100 lb (15,921 kg)
- Seating — Up to 24 passengers (airline) or 10–14 (executive)
Why Grumman Aircraft Hold Their Value
Grumman's reputation for building aircraft of extraordinary structural integrity and longevity is well-deserved and well-documented. The Gulfstream I's airframe was designed to military standards and has proven capable of accumulating flight hours that would be remarkable for any aircraft. The Ag Cat's biplane configuration and heavy-gauge construction make it virtually indestructible in the agricultural environment. The Mallard's marine-grade hull construction has allowed many examples to survive seven decades of amphibious operations. All three types are supported by passionate communities of owners and operators who have developed deep pools of expertise in maintaining and restoring these legendary machines.
Buying a Grumman Turbine Aircraft — Key Considerations
- Airframe Inspection — Engage a Grumman specialist for pre-purchase inspection; assess structural condition carefully, particularly around wing attach fittings, spar carry-through, and hull/float integrity on amphibious variants.
- Engine Condition — Dart engines on the Gulfstream I require specialist knowledge; PT6A engines on converted Ag Cats and Mallards are well-supported; assess SMOH and hot section inspection records carefully.
- Parts Availability — Rolls-Royce Dart parts for the Gulfstream I require specialist sourcing; PT6A parts for turbine conversions are widely available; assess parts support before purchase.
- Regulatory Status — Verify airworthiness certificates, AD compliance, and STC documentation for all modifications; turbine conversions must be properly certified.
- Type Rating — The Gulfstream I requires a specific type rating; confirm crew qualifications before acquisition.
Find Your Grumman Turbine Aircraft on Airplane Trade
Airplane Trade is the premier global marketplace for vintage and classic turbine aircraft including the Grumman Gulfstream I, Turbine Ag Cat, and Turbine Mallard. Browse verified listings from private owners, estate sales, and specialist dealers across North America, Europe, and the Caribbean. Each listing includes complete specifications, engine status, and direct seller contact. Whether you are a collector, an agricultural operator, or a seaplane enthusiast, find your Grumman on Airplane Trade today.