S-25 Berkut Scale Rocket Kit This is a sport-scale model of the S25-Berkut which was part of the first operational Surface-To-Air missile system. Developed in the USSR in the 1950's, it was intended to defend Moscow from aerial attacks. The large fins really make it stand out. The model rocket has an impressive 8.47" fin span and stands nearly 28" tall. The scale S25-Berkut missile flies D to F motors for a wide motor selection. As the tail-end is wider, the kit includes a plywood transition ring, and cardstock transition template. This is a Skill Level 4 kit. $27.95  No decals are provided with this kit, as none are needed. Dimensions Overall length : 27.96" Diameter : 1.637" (BT60) Forward Fin Span : 8.47" Weight : 4.7oz Recommended Motors Estes® D12-5 Single Use Aerotech® E20-7 Aerotech® RMS E18-7, E28-7 Challenges There is a tailcone/transtion which is formed from a cardstock template and a pre-cut plywood ring. This makes this a Skill Level 4 flying model rocket kit. Challenges The S25-Berkut rocket kit includes a translucent plastic nose cone, balsa fin sheets, fin templates, plywood centering rings, 15" plastic parachute kit.