Pye Wacket was the codename for an experimental lenticular-form air-to-air missile developed by the Convair Division of the General Dynamics Corporation[1] in 1957.

Project "Pye Wacket", officially known as the Lenticular Defense Missile (LDM) Program and by the project number WS-740A,[2] was instituted in 1958 in response to a US Air Force request for a Defensive Anti-Missile System (DAMS) to protect the proposed B-70 Valkyrie strategic bomber from high-speed, high-altitude surface-to-air missiles (SAMs) and interceptor aircraft.

[4] However it was anticipated that future aircraft and missile developments would reduce the B-70's margin of superiority,[3] especially following the SA-2 Guideline SAM being displayed during the 1957 May Day parade.

[3] The lenticular design was considered to have the best handling characteristics at extremely high angles of attack, and would theoretically possess ideal mass distribution, giving the missile outstanding terminal agility.

[2] Following the feasibility studies, a contract for the development of the DAMS design was awarded to the Convair division of the General Dynamics Corporation in Pomona, California in 1959.