The Sandhawk is our sport scale version of the famous American sounding rocket! The 29mmt is an advanced series kit, which features factory pre-slotted airframe and through-the-wall fin construction. It's perfect for F and G motors, and the rugged airframe can take I power if you can handle it! The 38mmt is the performance series version and is great as a stand alone kit or is ready to be married to the 3" Terrier Booster section for 2 stage flight.