The Ju-87 V1 was not a very pretty aircraft -- none of its descendants would be, either -- with a somewhat untidy nose with an inline, water-cooled engine; a high-set canopy for a pilot and a rearward-facing gunner / radio operator; a braced tail with twin tailfins; an inverted gull wing, with a flap inboard and in mid-span and an aileron outboard on each wing; and fixed landing gear, with the main gear in oversized pant-type fairings. Since German industry couldn't deliver the needed powerplant at the time, the Ju-87 V1 was fitted with a British Rolls Royce 12-cylinder, supercharged, liquid-cooled vee Kestrel engine with 391 kW (525 HP), as was the first prototype of the famous Messerschmitt Bf-109 fighter. The Kestrel engine drove a two-bladed fixed wooden prop. Engine cooling proved problematic, and so the V1 was refitted with a larger chin radiator, which did nothing to improve its looks.