The Me-163 �Komet� finished up being the only functional rocket-powered fighter aircraft during WWII. The Me-163 �A� project guideline called �Project X� started in 1937 under Dr. Alexander Lippisch. It absolutely was created for security purposes using rocket devices. Initial Me-163 travelled in 1941. There is gas usage and engine effectiveness issues, which limited its range. In August 1943, the Me-163 B was created using further improvements. Production were only available in July 1944 and a total of 279 is at truth given to the Luftwaffe.