Darkwind

Two more products from the fine KLS line. These craft, instead of relying on volatile liquid fuel, use the far safer alternative of solid fuel boosters. As with all KLS products, they are guaranteed not to explode below 1m/s. The KLS(S) 1: Golden League Eight solid-fuel engines accelerate this lean, mean, speeding machine to velocities in excess of 400m/s while the wide wheelbase provides stability. This made it to 401m/s land speed. The KLS(S) 2: Platinum League Made by strapping an additional eight engines to the KLS(S) 1 chassis, this sixteen-engined monstrosity is capable of velocities of over 420m/s. Top measured speed 429m/s

An entry for the Silver League. A compact five-engine design, the KLS 1 is guaranteed not to explode at anything less then 1m/s. It made it up to 220m/s before I decided discretion was the better part of valour, and cut the engines. Not very Kerbaly I know, but previous iterations of the design had a tendency to disintegrate at about 230m/s (one crashed so hard it crashed the game). Edit: I made it up to 231m/s with the same design