Reviews

• Scratch ElCheapoCerto By Larry Brand (July 10, 2009)

  ( Contributed - by Larry Brand - 07/10/09) Brief: I designed this odd, little 5-tube tubefin with one purpose in mind: as an ultra low-cost, quick-building L1 certification for 14 year old rocketeers under the new NAR junior cert program. After spending so much effort figuring out how to make tubefin rockets more efficient, I "retro-engineered" this one (I think that's the ...