Hopi-Dart was an American sounding rocket used by the NASA Marshall Space Flight Center for aeronomy studies in the early 1960s.

Hopi-Dart
FunctionSounding rocket
ManufacturerMarshall Space Flight Center
Country of originUnited States
Size
Height3.32 m (10.9 ft)
Diameter0.11 m (4.3 in)
Mass38 kg (84 lb)
StagesTwo
Payload to 97 km (60 mi)
Mass4.99 kg (11.0 lb)
Launch history
StatusRetired
Launch sitesMultiple
Total launches22
First flight28 February 1963
Last flight23 November 1964
First stage – Hopi III
Diameter0.11 m (4.3 in)
Propellantsolid
Second stage – Dart
Diameter3.5 cm (1.4 in)

Design

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Hopi-Dart was a two-stage vehicle, combining a solid-fuelled Hopi III first stage with an unpowered Dart second stage.[1] It was originally capable of carrying a payload of 4.5 kilograms (10 lb) to an apogee of 64 kilometres (40 mi); an upgrade, sometimes known as "Hopi Plus", increased the apogee to 97 km (60 mi).[2] The Hopi-Dart was developed for NASA Marshall Space Fight Center to obtain wind speeds at altitudes from 70 to 90 kilometers in support of Saturn launches. Design was headed by Charles W. Watson.[3]

Operational history

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Eleven test and eleven operational aeronomy missions were flown, with Wallops Island, the Tonopah Test Range, and the Cape Canaveral Air Force Station Launch Complex 43 being used as launch sites.[4] Four of the test launches were failures.[1] After flight 18 significant modifications were made. The modifications were to the interstage, propellant formulation, and the rocket nozzle. The redesigned first stage was renamed the Hopi III.[5] Hopi III-Dart was replaced by the Super Loki-Dart of Space Data Corporation.[6]

References

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Citations
  1. ^ a b Wade, Mark. "Hopi Dart". Encyclopedia Astronautica. Archived from the original on December 27, 2016. Retrieved 2017-12-08.
  2. ^ Jacobs and Whitney 1962, p. 80.
  3. ^ Morris and Pines 2000, p. 195.
  4. ^ Morris and Pines 2000, p. 197-199.
  5. ^ Morris and Pines 2000, p. 199.
  6. ^ Morris and Pines 2000, p. 200.
Bibliography
  • Jacobs, Horace; Eunice Engelke Whitney (1962). Missile and Space Projects Guide 1962. New York: Springer Science+Business Media. ISBN 978-1-4899-6967-5.
  • Morrow, Richard B.; Pines, Mitchell S. (2000). Small Sounding Rockets. Searingtown, New York: Small Rocket Press. ISBN 0-967-4106-0-6.