The Grumman G-73 Mallard is a classic twin-engine amphibious aircraft built for one of aviation’s most romantic missions: connecting land, water, remote coastlines, island communities, private estates, and luxury destinations with equal confidence.

Designed by Grumman after the success of its earlier amphibians, the Grumman G-73 Mallard brought larger cabin comfort, radial-engine power, and refined post-war engineering to the amphibious aircraft market. It is a flying yacht with wings — practical, elegant, rare, and unmistakably nautical in spirit.

For aviation buyers searching for a Grumman Mallard for sale, classic amphibious aircraft, twin-engine seaplane, vintage flying boat, radial-engine amphibian, collectible post-war aircraft, or luxury island-hopping aircraft, the Grumman G-73 Mallard is one of the most charismatic aircraft in its category.

Key Takeaway: The Grumman G-73 Mallard is not simply an aircraft — it is a post-war amphibious icon, ideal for buyers who value rare engineering, water-capable adventure, vintage luxury, and the romance of arriving where runways are optional.

Powerplant, Systems & Technical Highlights

The Grumman G-73 Mallard is powered by two Pratt & Whitney R-1340-S3H1 Wasp nine-cylinder radial engines, each producing approximately 600 hp. This gives the aircraft its unmistakable sound, strong water-operation character, and the deep mechanical personality that only large radial amphibians can deliver.

Technically, the Grumman G-73 Mallard was built around serious utility. Its twin-engine layout, amphibious hull, retractable landing gear, high wing, and robust Grumman construction make it a rare aircraft that can operate from both conventional airports and suitable water surfaces.

Technical highlights include:

• Powerplant: 2 × Pratt & Whitney R-1340-S3H1 Wasp radial engines

• Power output: Approx. 600 hp each

• Engine layout: Nine-cylinder air-cooled radial engines

• Aircraft category: Twin-engine amphibious transport aircraft

• Crew: 2

• Passenger capacity: 10 passengers

• Maximum speed: Approx. 187 kt / 215 mph / 346 km/h

• Range: Approx. 1,199 nm / 1,380 mi / 2,221 km

What makes the Grumman G-73 Mallard technically attractive? It combines radial-engine twin power, water and runway capability, large-cabin practicality, and post-war Grumman durability in an aircraft that feels both functional and deeply collectible.

For buyers asking, “Is the Grumman G-73 Mallard a practical amphibious aircraft?” the answer is yes — for the right owner or operator. It is best understood as a specialist classic amphibian, offering extraordinary access and presence, but requiring proper maintenance, water-operating discipline, and careful documentation review.

Exterior & Cockpit

The Grumman G-73 Mallard has one of the most graceful silhouettes in amphibious aviation. Its boat-like hull, high wing, twin radial nacelles, broad tail surfaces, and tall stance create the unmistakable look of a classic seaplane built for both elegance and hard work.

Unlike many purely utilitarian aircraft, the Grumman G-73 Mallard carries a sense of post-war luxury. It looks equally natural beside a marina, on a lake, at a coastal airfield, or in a collector’s hangar.

Exterior highlights include:

• Amphibious hull design for water operations

• Retractable landing gear for runway operations

• High-wing configuration for water clearance and visibility

• Twin radial engine nacelles

• Large vertical tail and stable empennage design

• Wide fuselage with passenger-transport presence

• Classic Grumman amphibian construction character

• Strong appeal for aviation museums, private collections, island operators, and luxury aviation brands

Inside, the Grumman G-73 Mallard offers a cabin experience that feels far more substantial than smaller amphibians. It was designed for passenger transport and executive use, making it especially appealing to buyers who want vintage aircraft character with genuine cabin presence.

Cockpit and cabin highlights include:

• Two-pilot cockpit layout

• Classic analog flight deck environment

• Passenger cabin typically configured for up to 10 occupants

• Large windows for scenic coastal and water flying

• Spacious vintage transport feel

• Practical cabin access for passengers and equipment

• Strong suitability for luxury seaplane experiences, private island travel, and heritage operations

• Excellent storytelling value for collectors and aviation content

The cockpit of the Grumman G-73 Mallard feels professional, maritime, and wonderfully mechanical. For a CollectAirs buyer, it offers not just a place to fly from, but a command position in one of the most evocative amphibious aircraft ever built.

The Perfect Airplane For

The Grumman G-73 Mallard is perfect for buyers who want a rare aircraft with genuine utility, visual drama, and strong collector appeal. It is especially attractive to amphibious aircraft enthusiasts, private island owners, luxury travel operators, aviation museums, heritage foundations, and collectors of distinctive post-war aircraft.

Who is the Grumman G-73 Mallard best suited for? It is best suited for a buyer who wants classic amphibious capability, twin radial-engine character, large-cabin presence, and an aircraft that can tell a story before it even starts moving.

The Grumman G-73 Mallard is ideal for:

• Collectors of classic amphibious aircraft

• Private owners with coastal, island, or lake-access missions

• Luxury aviation and seaplane experience operators

• Aviation museums and heritage foundations

• Pilots with specialist seaplane and multi-engine experience

• Film, editorial, and aviation storytelling projects

• Restoration-focused buyers seeking a rare Grumman aircraft

• Operators who value access, presence, and vintage character

The Grumman G-73 Mallard is not ideal for buyers seeking simple low-cost ownership, short local flights only, or ordinary landplane operations. Its value lies in amphibious freedom, rarity, passenger appeal, and the deeply emotional character of twin radial seaplane aviation.

Potential buyer profile:

• You want a classic twin-engine amphibious aircraft

• You value Grumman engineering heritage

• You appreciate radial engine sound and vintage aircraft presence

• You need or admire land-and-water operating capability

• You care about hull condition, corrosion inspection, engine history, propeller status, airframe logs, and restoration quality

• You understand the importance of seaplane training, water-operation procedures, and specialist maintenance

• You want an aircraft that feels rare, cinematic, capable, and emotionally unforgettable

In short, the Grumman G-73 Mallard is the perfect airplane for a buyer who sees aviation as access, elegance, and adventure. It is a classic amphibian with the soul of a yacht, the voice of two radials, and the presence of a true collector aircraft.