P 51 Mustang Oddities I

P 51 Mustang Oddities Part 1

As the top fighter aircraft of the end of WW2, the Mustang has had a few interesting (and some odd) spin-offs:

The North American F-82 Twin Mustang is probably one of the strangest, born on the success of the twin boom-tailed P38 Lightning someone had the idea of combining the fuselages of 2 Mustangs. 

They built 270 of these things, and interestingly the first three North Korean aircraft shot down during the Korean war were victims of these unusual aircraft.

Based on the iconic P-51 Mustang, which rose to fame as one of the USAAF’s most successful fighters of WWII, the F-82 Twin Mustang more or less lived up to its name. It was essentially two P-51′s fused together at the wing and the horizontal stabilizer. It was initially intended to be  a very long-range (VLR) escort fighter to accompany Boeing B-29 Superfortresses on their missions over Japan. However the first F-82′s were only ready for service after WW2 had come to an end.

 Development of the North American F-82 Twin Mustang began back in 1943, when the company began work on a fighter that could travel over 2,000 miles (3,220 km) without refueling. Although the aircraft is based on the P-51 Mustang, there were a number of changes necessary to make the aircraft airworthy and fit for its role. The fuselages were lengthened by 57 inches (145 cm) in order to accept additional internal fuel tanks and equipment. The center section of wing was also completely redesigned. Within this central wing six M2 Browning machine guns were fitted. In addition the outer wings were strengthened so they could carry additional fuel in external drop-tanks, or extra ordinance such as rockets or bombs.

The North American F-82 Twin Mustang’s first outing didn’t prove very successful as the aircraft was unable to get off the ground. After a month of investigation engineers figured out what the problem was. The propellers had been designed so that they spun in opposite directions to counter each other out, and they both turned upwards as they approached the center wing. However this resulted in all the lift from the central wing being cancelled out from the drag of the propellers. By switching the rotation of both propellers, so they now met as they were turning downwards, the problem was rectified.

Early prototype F-82′s both featured fully equipped cockpits so the pilots could alternate control on long flights. However later night-fighter versions of the F-82 Twin Mustang only had flight controls on the left side. The right side cockpit was for the radar operator.

To match its odd design the F-82 had another quirk. It was one of the only aircraft in which the trainer version was faster than the combat version. This was due to the fact some of the earlier F-82′s were powered by British-made Merlin engines. However the US military decided it would be more fitting if the aircraft featured an all-American engine, so later aircraft were fitted with less powerful GM Allison engines.

During its lifetime the F-82 Twin Mustang saw service as a long range interceptor to safeguard against Soviet air attack, it operated as a radar-equipped all-weather night fighter, it was used as a air-to-ground attack aircraft, it was the first aircraft to take part in a combat mission during the Korean War and it was the first aircraft to score confirmed kills in the Korean War. Interestingly, although the F-82 Twin Mustang excelled during the first few months of the Korean War, as the conflict went on it was becoming increasingly obvious that propeller driven aircraft had no future in air-to-air combat as jet fighters were increasingly deployed by both sides.

After just seven short but busy years of service the North American F-82 Twin Mustang was retired in 1953. It remains one of the most successful weird aircraft ever to have flown.

At least five examples of the North American F-82 Twin Mustang exist today, and they are held in various museums and locations across the US.

Happy Birthday P51 Mustang! Cadillac of the Sky!

Happy Birthday P51 Mustang! Cadillac of the Sky!

First flew on this day 1940.

 The North American Aviation P-51 Mustang was an American long-range, single-seat fighter and fighter-bomber used during World War II, the Korean War and several other conflicts. During World War II, Mustang pilots claimed 4,950 enemy aircraft shot down, second only to the carrier borne Grumman F6F Hellcat among Allied aircraft.

I have had the priviledge of knowing one of the NZ Squadron commanders who flew the P51 D during WW2 as bomber escort. He went on to receive the freedom of Paris and to command the first NZ Vampire Squadron at Ohakea Airforce base

The Mustang was conceived, designed and built by North American Aviation (NAA), under the direction of lead engineer Edgar Schmued, in response to a specification issued directly to NAA by the British Purchasing Commission; the prototype NA-73X air frame was rolled out on 9 September 1940, albeit without an engine, 102 days after the contract was signed and it was first flown on 26 October.

The Mustang was originally designed to use the Allison V-1710 engine, which had limited high-altitude performance. It was first flown operationally by the Royal Air Force (RAF) as a tactical-reconnaissance aircraft and fighter-bomber. The addition of the Rolls-Royce Merlin to the P-51B model proved to be the engine that made the aircraft, at one stroke dramatically improving its altitude performance, speed, and its range. At 30,000 feet, the P-51B outran the A model by 100 mph.

P51A

The definitive version, the P-51D, was powered by the Packard V-1650-7, a license-built version of the Rolls-Royce Merlin 60 series two-stage two-speed supercharged engine, and armed with six .50 caliber (12.7 mm) M2 Browning machine guns.

From late 1943, P-51Bs (supplemented by P-51Ds from mid-1944) were used by the USAAF's Eighth Air Force to escort bombers in raids over Germany, while the RAF's 2 TAF and the USAAF's Ninth Air Force used the Merlin-powered Mustangs as fighter-bombers, roles in which the Mustang helped ensure Allied air superiority in 1944. The P-51 was also in service with Allied air forces in the North African, Mediterranean and Italian theatres, and saw limited service against the Japanese in the Pacific War.

At the start of Korean War, the Mustang was the main fighter of the United Nations until jet fighters such as the F-86 took over this role; the Mustang then became a specialized fighter-bomber. Despite the advent of jet fighters, the Mustang remained in service with some air forces until the early 1980s !

After World War II and the Korean War, many Mustangs were converted for civilian use, especially air racing.

Technical credit: Wikipaedia