# List of Thor DM-18A launches

The Thor DM-18A was an American suborbital launch vehicle. It flew 50 times. It had 6 failures, 3 partial failures, and 41 successes. It had a 82% launch reliability. Its first flight attempt was on 5 November 1958. Its first successful launch was on 16 December 1958. Its last launch was on 19 June 1962. The Thor DM-18A was evolved from the Thor DM-18, the first Thor rocket. Thor DM-18A was the first operational finless variant of the original missile.

## Launch history

The data in this table comes from :
| Date/Time (UTC) | Rocket | S/N | Launch Site | Function | Orbit | Outcome | Remarks |
| 1958-11-05 08:53 | Thor DM-18A | Thor 138 | CCAFS LC-17B | Missile test | Suborbital | Failure | Maiden flight of Thor DM-18A. Flight control failure. RSO T+45 seconds. |
| 1958-11-26 09:09 | Thor DM-18A | Thor 140 | CCAFS LC-17B | Missile test | Suborbital | Partial failure | Loss of guidance system power caused the missile to overshoot its target point by 22 miles. |
| 1958-12-06 00:41 | Thor DM-18A | Thor 145 | CCAFS LC-18B | Missile test | Suborbital | Partial failure | LOX tank pressurization failure led to loss of thrust. Missile impacted 20 miles short of the target point. |
| 1958-12-16 23:44:45 | Thor DM-18A | Thor 151 | VAFB LC-75-1-1 | Missile test | Suborbital | Success | First Thor launch from Vandenberg AFB |
| 1958-12-17 04:00 | Thor DM-18A | Thor 146 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1958-12-31 02:00 | Thor DM-18A | Thor 138 | CCAFS LC-18B | Missile test | Suborbital | Failure | Flight control failure. RSO T+40 seconds. |
| 1959-01-30 23:53 | Thor DM-18A | Thor 154 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1959-03-22 00:58 | Thor DM-18A | Thor 158 | CCAFS LC-18B | Missile test | Suborbital | Success | |
| 1959-03-27 04:02 | Thor DM-18A | Thor 162 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1959-04-16 20:46 | Thor DM-18A | Thor 161 | VAFB LC-75-2-8 | Missile test | Suborbital | Success | |
| 1959-04-23 05:30 | Thor DM-18A | Thor 176 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1959-04-25 05:00 | Thor DM-18A | Thor 164 | CCAFS LC-18B | Missile test | Suborbital | Success | |
| 1959-05-12 17:35 | Thor DM-18A | Thor 187 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1959-05-23 02:42 | Thor DM-18A | Thor 184 | CCAFS LC-18B | Missile test | Suborbital | Success | |
| 1959-06-16 21:45 | Thor DM-18A | Thor 191 | VAFB LC-75-2-7 | Missile test | Suborbital | Failure | Pitch and roll program failed to initiate. RSO T+50 seconds. |
| 1959-06-26 | Thor DM-18A | Thor 198 | CCAFS LC-18B | Missile test | Suborbital | Success | |
| 1959-06-30 02:37 | Thor DM-18A | Thor 194 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1959-07-21 07:33 | Thor DM-18A | Thor 203 | CCAFS LC-17B | Missile test | Suborbital | Failure | Pitch and roll program failed to initiate. RSO T+40 seconds. |
| 1959-07-24 12:47 | Thor DM-18A | Thor 202 | CCAFS LC-18B | Missile test | Suborbital | Success | |
| 1959-08-03 21:41 | Thor DM-18A | Thor 175 | VAFB LC-75-1-1 | Missile test | Suborbital | Success | |
| 1959-08-06 02:48 | Thor DM-18A | Thor 208 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1959-08-14 09:00 | Thor DM-18A | Thor 204 | CCAFS LC-18B | Missile test | Suborbital | Success | |
| 1959-08-14 19:36:04 | Thor DM-18A | Thor 190 | VAFB LC-75-2-6 | Missile test | Suborbital | Partial failure | Premature propellant depletion. Planned range not achieved. |
| 1959-08-27 12:30 | Thor DM-18A | Thor 216 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1959-09-12 | Thor DM-18A | Thor 217 | CCAFS LC-18B | Missile test | Suborbital | Success | |
| 1959-09-17 21:09 | Thor DM-18A | Thor 228 | VAFB LC-75-1-2 | Missile test | Suborbital | Success | |
| 1959-09-22 18:00 | Thor DM-18A | Thor 222 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1959-10-06 16:41 | Thor DM-18A | Thor 235 | CCAFS LC-18B | Missile test | Suborbital | Success | |
| 1959-10-06 18:26 | Thor DM-18A | Thor 239 | VAFB LC-75-2-8 | Missile test | Suborbital | Success | |
| 1959-10-14 04:15 | Thor DM-18A | Thor 221 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1959-10-21 22:57 | Thor DM-18A | Thor 220 | VAFB LC-75-1-1 | Missile test | Suborbital | Success | |
| 1959-10-29 02:12 | Thor DM-18A | Thor 230 | CCAFS LC-18B | Missile test | Suborbital | Success | |
| 1959-11-03 | Thor DM-18A | Thor 238 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1959-11-12 19:24 | Thor DM-18A | Thor 181 | VAFB LC-75-1-2 | Missile test | Suborbital | Success | |
| 1959-11-19 | Thor DM-18A | Thor 244 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1959-12-01 17:00 | Thor DM-18A | Thor 254 | CCAFS LC-18B | Missile test | Suborbital | Success | |
| 1959-12-02 05:29 | Thor DM-18A | Thor 265 | VAFB LC-75-1-1 | Missile test | Suborbital | Failure | |
| 1959-12-15 02:14 | Thor DM-18A | Thor 185 | VAFB LC-75-1-2 | Missile test | Suborbital | Failure | Flight control failure. Missile broke up T+60 seconds. |
| 1959-12-17 | Thor DM-18A | Thor 255 | CCAFS LC-17B | Missile test | Suborbital | Success | |
| 1960-01-21 20:10 | Thor DM-18A | Thor 215 | VAFB LC-75-1-2 | Missile test | Suborbital | Success | |
| 1960-03-02 20:06 | Thor DM-18A | Thor 272 | VAFB LC-75-2-8 | Missile test | Suborbital | Success | |
| 1960-06-22 23:26 | Thor DM-18A | Thor 233 | VAFB LC-75-2-7 | Missile test | Suborbital | Success | |
| 1960-10-11 21:53 | Thor DM-18A | Thor 186 | VAFB LC-75-2-8 | Missile test | Suborbital | Success | |
| 1960-12-13 20:08 | Thor DM-18A | Thor 267 | VAFB LC-75-2-8 | Missile test | Suborbital | Success | |
| 1961-03-30 05:13:43 | Thor DM-18A | Thor 243 | VAFB LC-75-2-7 | Missile test | Suborbital | Success | |
| 1961-06-20 23:54 | Thor DM-18A | Thor 276 | VAFB LC-75-2-7 | Missile test | Suborbital | Success | |
| 1961-09-06 22:30 | Thor DM-18A | Thor 165 | VAFB LE-7 | Missile test | Suborbital | Success | |
| 1961-12-06 01:30 | Thor DM-18A | Thor 214 | VAFB LE-8 | Missile test | Suborbital | Success | |
| 1962-03-19 23:28 | Thor DM-18A | Thor 229 | VAFB LE-7 | Missile test | Suborbital | Success | |
| 1962-06-19 00:30 | Thor DM-18A | Thor 269 | VAFB LE-8 | Missile test | Suborbital | Success | |