Messerschmitt Bf 109 was called the Me 109R, suggesting it was just another variant of the standard fighter, but in fact it was a racing aircraft having little in common with the Bf 109. It was powered by the DB 601ARJ, producing 1,156 kW (1,550 hp), but capable of reaching 1,715 kW (2,300 hp). This world record for a piston-engined aircraft was to stand until 1969, when Darryl Greenamyer's modified Grumman F8F Bearcat, "Conquest I", broke it with a 777 km/h (483 mph) record speed. When the Bf 109 was designed in 1934, by a team led by Willy Messerschmitt and Robert Lusser,
Messerschmitt Bf 109 in Yugoslav service Group scrambled to meet the first onslaught, and they were soon joined by the Messerschmitts of 32nd Fighter Group. Seven claims were made by the pilots of the 102nd Squadron of the 51st Fighter Group, losing five aircraft in return. The 32nd Fighter Group Messerschmitts claimed another four bombers for the loss of two of their own, although several more Yugoslav fighters were hit and damaged. During the initial melee, Yugoslav anti-aircraft guns had fired at the Yugoslav Messerschmitts as well as the German ones, unable to distinguish between them. Messerschmitt Bf 109 in Yugoslav service The Royal Yugoslav Air