Lockheed P-3 Orion

The Lockheed P-3 Orion is a Lockheed made four engined aircraft with variations such as the P-3K, P-3C, P-3As and more. Mostly used as maritime patrol aircraft due to the probes located at the rear of the aircraft where the APU would be found on other aircraft. The aircraft runs on Rolls Royce Allison's T56-A-14 engine with Hamilton Standard 54H60-77 propeller.

P-3 Orion
A Japanese P-3C of the JMSDF
Role	Maritime patrol aircraft
National origin	United States
Manufacturer	Lockheed Lockheed Martin Kawasaki Heavy Industries
First flight	November 1959
Introduction	August 1962
Status	Active
Primary users	United States Navy Royal New Zealand Air Force Japan Maritime Self-Defense Force Royal Australian Air Force Republic of Korea Navy
Produced	1961–1990
Number built	Lockheed – 650, Kawasaki – 107, Total – 757
Unit cost	US$36 million (FY1987)
Developed from	Lockheed L-188 Electra
Variants	Lockheed AP-3C Orion Lockheed CP-140 Aurora Lockheed EP-3 Lockheed WP-3D Orion
Developed into	Lockheed P-7