Pitcairn XO-61 - Helicopter - avia.wikisort.org

avia.wikisort.org - Helicopter

The Pitcairn XO-61 was an American autogyro designed by Pitcairn Aircraft. One of the last autogyros produced, in competition with the Kellett YO-60 and the Sikorsky R-4, it fell victim to cooling problems with its rear-mounted engine and the coming of the helicopter with its ability to hover.[1][2]

Pitcairn XO-61

Role	Autogyro Type of aircraft
National origin	United States
Manufacturer	Pitcairn Aircraft Inc
Primary user	United States Army Air Forces

Also known by the company model number PA-44 and the contract designation MX-157,[3] the contract for the XO-61 was taken over by G&A Aircraft upon G&A's acquisition of Pitcairn Aircraft.[4]

References

Wikimedia Commons has media related to Pitcairn XO-61.

Citations

Gregg, E. Stuart, "Above & Beyond: Jump Ship" Archived 2013-10-17 at the Wayback Machine. Air & Space Smithsonian, March 2001
Harris, Franklin D. An Overview of Autogyros and The McDonnell XV-1 Convertiplane, NASA/CR—2003–212799. NASA Ames Research Center, October 2003
Cully, George & Andreas Parsch: MX-1 to MX-499 Listing, designation-systems.net
Wings of Freedom Winter 2007/2008, Volume 22 Number 4, Delaware Valley Historical Aircraft Association.

Bibliography

Cully, George & Andreas Parsch: MX-1 to MX-499
Gregg, E. Stuart, "Above & Beyond: Jump Ship". Air & Space Smithsonian, March 2001 Listing, designation-systems.net
Harris, Franklin D. An Overview of Autogyros and The McDonnell XV-1 Convertiplane, NASA/CR—2003–212799. NASA Ames Research Center, October 2003
Wings of Freedom Winter 2007/2008, Volume 22 Number 4, Delaware Valley Historical Aircraft Association.

v t e Pitcairn and Autogiro Company of America aircraft
Pitcairn	PA-1 Fleetwing PA-2 Sesquiwing PA-3 Orowing PA-4 Fleetwing II PA-5, PA-6, PA-7, PA-8 Mailwing PA-11 PA-18 PA-19 PA-20 PA-21 PA-22 PA-24 PA-33 (YG-2) PA-34 (OP-2) PA-36 PA-38 PA-39 PA-44 (XO-61
Pitcairn-Cierva Autogiro	PAA-1 PAA-2 PCA-1 PCA-2 OP-1 PCA-3
Autogiro Company of America	AC-35

United States observation aircraft designations, USAAC/USAAF and Tri-Service systems

USAAC/USAAF sequence
(1924–1942)

O-1
O-2
O-3
O-4
O-5
O-6
O-7
O-8
O-9
O-10
O-11
O-12
O-13
O-14
O-15
O-16
O-17
O-18
O-19
O-20
O-21
O-22
O-23
O-24
O-25
O-26
O-27
O-28
O-29
O-30
O-31
O-32
O-33
O-34
O-35
O-36
O-37
O-38
O-39
O-40
O-41
O-42
O-43
O-44
O-45
O-46
O-47
O-48
O-49
O-50
O-51
O-52
O-53
O-54
O-55
O-56
O-57
O-58
O-59
O-60
O-61
O-62
O-63

Tri-service sequence
(1962–present)

O-1
O-2
O-3
O-4¹
O-5
O-6

Related designations	OV-1 OV-10 OV-12

¹ Unconfirmed

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See also

References

Citations

Bibliography