The L-W-F Model H Owl was a large American twin-boom trimotor biplane designed and built by LWF Engineering as a mail plane in 1920, but after being rejected for that role, the single prototype was sold to the United States Army Air Service for evaluation as a bomber but failed to secure any orders.

[1][2] It had a center nacelle with room for three crew members suspended on struts between the wings and flanked on either side by similarly braced tail booms.

The Owl was first flown by Ernest Harmon from Mitchel Field, on Long Island, New York, on 22 May 1920.

[1] Although built for night air mail service (hence being named Owl), it failed to interest the Post Office.

[3] Between 1921 and 1922, the United States Army Air Service evaluated it as a bomber at Langley Field in Virginia[4][3] when it was allocated Army Air Service serial number 64012,[5] however its performance was described as “adequate but not impressive.”[4][3] General Billy Mitchell planned to evaluate the design during the bombing tests to sink the USS New Jersey and the USS Virginia in September 1923, but it does not appear that this actually occurred.