Pitcairn XO-61
General information
Type	Autogyro
National origin	United States
Manufacturer	Pitcairn Aircraft Inc
Primary user	United States Army Air Forces

ThePitcairn XO-61 was an Americanautogyro designed byPitcairn Aircraft. One of the last autogyros produced, in competition with theKellett YO-60 and theSikorsky R-4, it fell victim to cooling problems with its rear-mounted engine and the coming of thehelicopter with its ability to hover.^[1][2]

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

Aircraft of comparable role, configuration, and era

• Kellett YO-60
• Sikorsky R-4

Related lists

• List of helicopters
• List of military aircraft of the United States

Wikimedia Commons has media related toPitcairn XO-61.

• 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. NASAAmes Research Center, October 2003
• Wings of Freedom Winter 2007/2008Archived 2008-05-09 at theWayback Machine, Volume 22 Number 4, Delaware Valley Historical Aircraft Association.

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