This is not a single dash number but a family overview: the R-2800 in all its variants represents one of the largest production runs of any single aircraft engine model. From 1939 display at the New York World’s Fair to 1960 production end, the Double Wasp powered fighters, bombers, and airliners across a remarkable range of missions .
R-2800 Family Characteristics
The primary subject of this technical guide focuses on the Pratt & Whitney R-2800 Double Wasp (Family Overview) engine, engineered specifically for 18-Cylinder, 2-Row Radial, Air-Cooled applications. Below is an essential digest of this powertrain configuration.
• 125,000+ units produced
• Powered fighters and airliners
• Innovative cooling fin design
• 45.9L two-row radial
R-2800 Family Baseline Data
45.9 L displacement; 18 cylinders in two rows; air-cooled; power ratings from approximately 2,000 hp to over 2,400 hp depending on variant and boost configuration .
What made the R-2800 special was its cooling fin design: thin, highly pitched fins machined directly from the head forging solved heat dissipation at high power settings. With water injection and turbo-supercharging, it produced more than one horsepower per 16.4 cubic inches, delivering the greatest output at altitude of any engine in the world when introduced. The family powered the F6F Hellcat, F4U Corsair, P-47 Thunderbolt, B-26 Marauder, C-46 Commando, and DC-6, among many others .
| Configuration | 18-cylinder, 2-row radial |
|---|---|
| Cooling | Air-cooled |
| Bore | 146 mm (5.8 in) |
| Stroke | 152 mm (6.0 in) |
| Displacement | 45.9 L (2,800 cu in) |
| Power Range | ~2,000–2,400+ hp (variant dependent) |
| Weight | ~1,043 kg (2,300 lb) dry |
| Fuel | Aviation gasoline |
Aircraft Powered by the R-2800 Family
This engine model is deployed across various operational frameworks. Here is a breakdown of the typical machine or vehicle applications using this unit:
Grumman F6F Hellcat, Vought F4U Corsair, Republic P-47 Thunderbolt, Martin B-26 Marauder, Curtiss C-46 Commando, Douglas DC-6
Pros & Advantages
Massive production run (125,000+); proven across fighter, bomber, and airliner roles; innovative cooling fin design.
Cons & Disadvantages
Heavy; complex maintenance; requires careful cooling management at high power.
Frequently Asked Questions (FAQs)
Q1: How many R-2800 engines were produced?
A1: More than 125,000 units were manufactured by Pratt & Whitney and its licensees before production ended in 1960 .
Q2: What was the R-2800’s first major display?
A2: It was first displayed at the 1939 New York World’s Fair .
Q3: What was the R-2800’s power-to-displacement ratio?
A3: With water injection and turbo-supercharging, it produced more than one horsepower per 16.4 cubic inches .
The Grumman F6F Hellcat, Vought F4U Corsair, and Republic P-47 Thunderbolt were among the most famous R-2800-powered fighters .