This page was last modified on 22 December 2002.
Unlike the Blackbirds, the D-21 Locations are quite a mystery. I have done extensive research to try to have an accurate listing. I have received a list from the USAF Museum Office that is supposedly an accurate list. This list I have adopted for the most part, except the disposition of D-21B #510 which according to that sheet, it is at the Seattle Museum of Flight on M-21 #940. This cannot be since that D-21 is not a B-model and must be #501-#506. I have assigned #502 to the Seattle Museum of Flight. If anyone has substantial evidence one way or the other, please write to me. Additionally, the USAF Museum list adds a drone with a serial #539, which is perplexing because only 38 drones were built. This drone is evidently on display at Beale AFB. I am aware of a drone at Beale, but the serial has not been confirmed. The drones stored at NASA have been verified by NASA employees. The dispositions of #513, #525, #529, and #537 are accurate to the best of my knowledge.
| Serial Number | Launch Date | Launched From | Location (if not destroyed by launching) |
|---|---|---|---|
| D-21 #501 | 28 September 1967 | B-52H | |
| D-21 #502 | On Display in the Seattle Museum of Flight | ||
| D-21 #503 | 05 March 1966 | M-21 | |
| D-21 #504 | 30 July 1966 | M-21 | |
| D-21 #505 | 16 June 1966 | M-21 | |
| D-21 #506 | 27 April 1966 | M-21 | |
| D-21B #507 | 06 November 1967 | B-52H | |
| D-21B #508 | 19 January 1968 | B-52H | |
| D-21B #509 | 02 December 1967 | B-52H | |
| D-21B #510 | Location Unknown | ||
| D-21B #511 | 30 April 1968 | B-52H | |
| D-21B #512 | 16 June 1968 | B-52H | |
| D-21B #513 | Stored at Dryden Flight Research Center | ||
| D-21B #514 | 01 July 1968 | B-52H | |
| D-21B #515 | 15 December 1968 | B-52H | |
| D-21B #516 | 28 August 1968 | B-52H | |
| D-21B #517 | 09 November 1969 | B-52H | |
| D-21B #518 | 11 February 1969 | B-52H | |
| D-21B #519 | 10 May 1969 | B-52H | |
| D-21B #520 | 10 July 1969 | B-52H | |
| D-21B #521 | 20 February 1970 | B-52H | |
| D-21B #522 | Location Unknown | ||
| D-21B #523 | 16 December 1970 | B-52H | |
| D-21B #524 | On Display at the USAF Museum | ||
| D-21B #525 | On Display at Blackbird Airpark - NASA | ||
| D-21B #526 | 04 March 1971 | B-52H | |
| D-21B #527 | 20 March 1971 | B-52H | |
| D-21B #528 | Building 6, WPAFB | ||
| D-21B #529 | Stored at Dryden Flight Research Center | ||
| D-21B #530 | AMARC | ||
| D-21B #531 | AMARC | ||
| D-21B #532 | AMARC | ||
| D-21B #533 | Pima Air Museum, Tucson, AZ | ||
| D-21B #534 | AMARC | ||
| D-21B #535 | DEACCESSIONED | ||
| D-21B #536 | Location Unknown | ||
| D-21B #537 | Stored at Dryden Flight Research Center | ||
| D-21B #538 | Robins AFB |