Lockheed A-12
M-21
The M-21, a two-seat variant, carried and launched the Lockheed D-21, an unmanned, faster and higher-flying reconnaissance drone. The M-21 had a pylon on its back for mounting the drone and a second cockpit for a Launch Control Operator/Officer (LCO) in the place of the A-12's Q bay.

Lockheed A-12

Section Title: M-21
Table Section Text: The M-21, a two-seat variant, carried and launched the Lockheed D-21, an unmanned, faster and higher-flying reconnaissance drone. The M-21 had a pylon on its back for mounting the drone and a second cockpit for a Launch Control Operator/Officer (LCO) in the place of the A-12's Q bay.

Serial number	Article	Model	Flights	Hours	Fate

60-6924	121	A-12	322	418.2	On display

60-6925	122	A-12	161	177.9	On display

60-6926	123	A-12	79	135.3	Lost 1963

60-6927	124	A-12 trainer	614	1076.4	On display

60-6928	125	A-12	202	334.9	Lost 1967

60-6929	126	A-12	105	169.2	Lost 1967

60-6930	127	A-12	258	499.2	On display

60-6931	128	A-12	232	453.0	On display

60-6932	129	A-12	268	409.9	Lost 1968

60-6933	130	A-12	217	406.3	On display

60-6937	131	A-12	177	345.8	On display

60-6938	132	A-12	197	369.9	On display

60-6939	133	A-12	10	8.3	Lost 1964

60-6940	134	M-21	80	123.9	On display

60-6941	135	M-21	95	152.7	Lost 1966

Totals for all aircraft	3017	5080.9	9 On display, 6 Lost

Sentence(s)

Lockheed A-12 serial number was 60-6924.

final_sentence: Lockheed A-12 serial number was 60-6924.