The first A-4 flight-test model was completed 25 February 1942, but slipped out of its "corset" after being fully tanked at Test Stand VII, fell 2 meters, smashed three fins, and came to rest on the rim of the engine nozzle. After being repaired and renamed Versuchsmuster 1 (V1: Experimental Type 1), the rocket failed during a test firing (witnessed by Albert Speer) and was scrapped without any further launch attempt. Renamed V-2 in 1944.