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Pratt & Whitney Radial Engine: R-1340, 600 HP

Pratt & Whitney Radial Engine: R-1340, 600 HP

Want to feel like a little kid again? Take a flight aboard our North American SNJ-5 warbird aircraft and feel the growl of the aircraft’s Pratt & Whitney Radial Engine.

The Pratt & Whitney Radial Engine on our SNJ-5 is a R-1340 model with 600 horsepower. These radials are sometimes referred to as “round motors” because of the way cylinders are arrayed about the prop shaft. The P&W R-1340 has 9 cylinders.

General characteristics of the Pratt & Whitney Radial Engine:

  • Type: Nine-cylinder single-row supercharged air-cooled radial engine
  • Bore: 5.75 in (146 mm)
  • Stroke: 5.75 in (146 mm)
  • Displacement: 1,344 in3 (22 L)
  • Diameter: 51.75 in (1.314 m)
  • Dry weight: 930 lb (422 kg)

Components of the Pratt & Whitney Radial Engine:

  • Valvetrain: Two overhead valves per cylinder
  • Supercharger: Single-speed centrifugal type supercharger, 1:10 step-up
  • Fuel system: Two-barrel Stromberg carburetor
  • Fuel type: 91 octane rating gasoline
  • Cooling system: Air-cooled
  • Reduction gear: 3:2

Performance of the Pratt & Whitney Radial Engine:

  • Power output: 600 hp (447 kW) at 2,250 rpm at 6,200 ft (1,890 m)
  • Specific power: 0.45 hp/in³ (20.3 kW/L)
  • Compression ratio: 6:1
  • Power-to-weight ratio: 0.65 hp/lb (1.05 kW/kg)

In 2016, it received designation as a Historic Engineering Landmark from the American Society of Mechanical Engineers.

Want to feel the growl?

For the full WWII experience, go on the Admiral’s Warbird Adventure – an immersive two hour adventure that allows you to relive history as a Naval Aviator. Or, opt for Ensign’s Warbird Flight Experience – a thirty minute flight that is intended to familiarize you with the aircraft itself.

The warbird has a different sound to it than any jet you’ll fly nowadays with a turbine engine. For that unique experience, come visit us in Oahu, Hawaii. We’ll take you on an unforgettable experience 1500 feet in the air aboard the SNJ.

You’ll leave with a smile on your face like Camilo, one of our recent customers:

Camilo Navarro

Pearl Harbor Warbirds offers the best Hawai‘i flight adventure tours available. Be immersed in the details of the infamous attack on Pearl Harbor and soar above the important sites that played a part in the “Day of Infamy.” Relive history as you retrace the steps of the Army and Navy airmen in the days following the bombing. Fly on some of the same routes the Japanese attackers used into the airfields at Wheeler, Kāne‘ohe and Bellows. There are many air tours in Hawai‘i, but only one warbird airplane flight. Located in Honolulu, Hawai‘i Pearl Harbor Warbirds provides a personal historical experience making it one of the best O‘ahu attractions.

Fly Pearl Harbor like it was on December 10th, 1941. Learn more about our Admiral’s Warbird Adventure.

Due to the difficulty of finding proper parts the Pearl Harbor Warbird will be out of service until early November
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