Piasecki Helicopter

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Not to be confused with Piasecki Aircraft.
Piasecki Helicopter Corporation

Piasecki Helicopter Corporation designed and manufactured helicopters in Philadelphia and nearby Morton, Pennsylvania, in the late 1940s and the 1950s.[1] Its founder, Frank Piasecki, was ousted in 1956 and started a new company, Piasecki Aircraft. Piasecki Helicopter was renamed Vertol Corporation in early 1956.[2]: 257–8  Vertol was acquired by Boeing in 1960 and renamed Boeing Vertol.

History

The Piasecki Helicopter Corporation was founded in 1940 by Frank Piasecki and fellow aeronautics student Harold Venzie as the P-V Engineering Forum (shortened from Piasecki-Venzie);[3][4] the other partners were F.J. Kosloski, Donald N. Meyers, Elliott Daland, and Walter Swartz.[5] The first design from P-V Engineering was the PV-1, a rotorless-tail design that used a tapering tail cone and pressurized air to suppress main rotor torque.[6] Venzie left the firm in 1943.[7]: 143 

The

Civil Aviation Administration.[3][4]

Tandem rotor designs

XHRP-1 during flight trials (1946)

With the successful demonstration of the PV-2, Piasecki convinced the

PV-3 became the world's first successful tandem rotor design. The PV-3 first flew on March 7, 1945 and bore the Navy designation XHRP-X; it was larger and capable of lifting more than the contemporary Sikorsky designs.[3][4]

Because P-V Engineering lacked the capital to fund production, the company was reorganized and renamed to the Piasecki Helicopter Corporation in

HRP-1 in 1947.[4]
The HRP-1 was commonly nicknamed the "flying banana" because of the upward angle of the aft fuselage which ensured the large rotors did not hit each other in flight. The nickname would later be applied to other Piasecki tandem-rotor helicopters of similar design.

An evolutionary follow-on design to the HRP-1, designated HRP-2, used an all-metal skin and switched crew seating to side-by-side instead of tandem; however, the limited power meant only five were built, all for the Coast Guard.[6] In 1949, Piasecki provided the H-21 Workhorse to the United States Air Force, an improved version of the HRP-2 with a more powerful Wright R-1820 Cyclone radial engine.[6] Piasecki's tandem-rotor helicopters flew higher than competing single rotor designs, and offered a smoother ride.

At approximately the same time the HRP-1 and HRP-2 were being developed, the Navy commissioned Piasecki to design a smaller tandem-rotor utility helicopter; the resulting prototype, which Piasecki called the PV-14, was designated XHJP-1.[6] These went into production as the HUP-1 (PV-18), with the first variants delivered to both the Navy and the United States Army (as the H-25) in 1949; in total, 339 were delivered to the militaries of the United States, Canada, and France by 1954.[6] The HUP was designed with overlapping main rotor blades, which reduced the size so they could be carried on aircraft carrier elevators.[8]

Piasecki is forced out

YH-16 prototype in flight

Don R. Berlin was brought in as president and director of Piasecki Helicopters in 1953,[9] while Frank Piasecki was chairman of the board. Under Piasecki, the company began the PV-15 large transport tandem helicopter project (designated H-16). The prototype PV-15 was first flown in 1953, but a fatal crash in January 1956 led to the cancellation of the project.[6]

The majority owners eventually lost faith in Frank Piasecki's leadership and by May 1956 he was forced out of the company. He had formed a new company,

vertical take-off and landing) Aircraft Corporation and amended the bylaws to bar Piasecki's re-election as a director, on the grounds that he was running a rival company.[2]
: 257–8 

Acquisition by Boeing

In 1956, Vertol began developing a successor to the HUP with improved lift capacity by using

Boeing Helicopter Division
in 1987.

Products

Model name First flight Number built Type
Piasecki PV-2 1943 1 Single rotor piston engine helicopter
Piasecki PV-3 1945 28 Tandem rotor piston engine helicopter
Piasecki PV-15
 1953 2 Tandem rotor turbine engine helicopter
Piasecki PV-18 1948 339 Tandem rotor piston engine helicopter
Piasecki PV-22 1952 707 Tandem rotor piston engine helicopter
Vertol VZ-2 1957 1 Twin engine experimental tiltwing aircraft

See also

References

  1. ^ a b "Tandem Twosome". Vertical Magazine. February–March 2007.
  2. ^
    ISBN 978-0-82295-340-1
    .
  3. ^ a b c d e Hevesi, Dennis (February 15, 2008). "Frank Piasecki, a Pioneer in Helicopters, Is Dead at 88". The New York Times. Retrieved 13 April 2020.
  4. ^ a b c d Helicopter Association International (February 13, 2008). "HAI is Saddened by the Passing of Frank Piasecki, Helicopter Pioeneer". Vertical. Retrieved 13 April 2020.
  5. ^ White, L. B. (August 1951). "The Boy Who Grew Flying Bananas". Popular Science. Vol. 159, no. 2. Popular Science Publishing Co., Inc. pp. 129–132, 222. Retrieved 13 April 2020.
  6. ^ a b c d e f g h i "A Lasting Legacy". Vertical. May 24, 2013. Retrieved 13 April 2020.
  7. ISBN 0-472-08671-5
    . Retrieved 13 April 2020.
  8. ^ "Piasecki PV-14 / HUP-2 Retriever". American Helicopter Museum & Education Center. Retrieved 13 April 2020.
  9. ^ Miller, Steven (February 14, 2008). "Frank Piasecki, 88, Vertical Flight Pioneer". The New York Sun. Archived from the original on October 2, 2013. Retrieved June 2, 2013.
  10. ^ Goebel, Greg (1 April 2019). "The Boeing Sea Knight". Air Vectors. Retrieved 13 April 2020.
  11. ^ "Resume of Briefing on Vertol Division, the Boeing Co.". Department of Defense Appropriations for 1965. U.S. Government Printing Office. February 27, 1964. p. 196. Retrieved 13 April 2020.

Further reading

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