Reviews

• Scratch Dwarf King 4.0 By Larry Brand (October 17, 2009)

  Brief: This is a lighter, more affordable 4" version of of the 5.5" Dwarf King Mk.7 (7-tube tubefin) I presented earlier in EMRR. This design has the lowest drag coefficient of any tubefin I've built to date, Cd=0.68-0.70; it also differs from my big 5.5" Dwarf Kings in that this rocket is a much better performer than the 6-tube version, the Tea-Bird 4.0 I presented ...