Centuri Screaming Eagle / Spartan Fin Unit

thingiverse

This exact replica fin unit is designed to closely match the ones used in the Centuri model rocket kits, specifically the Screaming Eagle (kit #KF-3, 1973-1983) and Spartan (kit #KD-3, 1976 Stellar Series). It fits perfectly into the original ST-8 airframe tubing. The fin unit features an integrated engine hook channel, similar to the original design, as well as a motor mount tube block. There are two stock versions: one with and one without integrated fillets on the fins. Additionally, there are four other stock versions that include a filleted or non-filleted, 3/16-inch (4.76mm) launch lug. Furthermore, there are two versions with an extended, integrated tubing coupler that are either filleted or non-filleted. Lastly, there are two more versions featuring an extended, integrated tubing coupler with a 3/16-inch (4.76mm) integrated launch lug that are also filleted and non-filleted. For further information, visit JimZ's info page at spacemodeling.org/jimz/kf-3.htm. You can also view the Screaming Eagle in the 1973 Centuri catalog at ninfinger.org/rockets/nostalgia/73cen70g.html and the 1983 Centuri catalog at ninfinger.org/rockets/catalogs/centuri83/83cen4.html. The Spartan, on the other hand, can be found in the 1976 Spring Stellar Series Centuri catalog at ninfinger.org/rockets/catalogs/centuriRT76Spring/76SpringcenRT10.html and the Fall Stellar Series Centuri catalog at ninfinger.org/rockets/catalogs/centuriRT76Fall/76FallcenRT6.html. If you're interested in building your own Screaming Eagle, a comprehensive build article is available on modelrocketbuilding.blogspot.com. You can access it by searching for "C Screaming Eagle" or following the links to Part 1 through Part 8 of the series. For those looking for simulation data, a RockSim file is available at RocketReviews, located at rocketreviews.com/rocksim-centuri---screaming-eagle.html. Additionally, you can purchase Centuri ST-8 tubing from eRockets at erockets.biz/st-8/. If you're in need of a nose cone for your Screaming Eagle or Spartan, PNC-89 is available on Thingiverse, designed by 'dholvorson,' at thingiverse.com/thing:576222. The picture shown is an upscaled version of the Screaming Eagle 2.9x by Randy Gilbert, designed to fly on F-G 29mm rocket motors. The airframe diameter measures 2.6 inches (66.04mm) and the total length is 47.8 inches (1214.12mm or 1.21m). The graphics were upscaled printed on Papilio Silver Adhesive Polyester film using an inkjet printer.