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� were only available in 1937 under Dr. Alexander Lippisch. It had been made for protection purposes making use of rocket products. Initial Me-163 travelled in 1941. There is fuel use and motor effectiveness issues, which limited its range. In August 1943, the Me-163 B is made utilizing further improvements. Manufacturing were just obtainable in July 1944 and a total of 279 are at truth directed at the Luftwaffe.