Daimler-Benz DB 605

The Daimler-Benz DB 605 is a German aircraft engine, built during World War II. Developed from the DB 601, the DB 605 was used from 1942 to 1945 in the Messerschmitt Bf 109 fighter, the Bf 110 and Me 210C heavy fighters; the DB 610, a coupled "power system" powerplant comprising a pair of side-by-side configured examples of the DB 605, geared together in the front to turn a single output shaft — and which, like the similar DB 606 that it replaced, weighed 1,515 kg — was used in the A-3 and all A-5 variants of Germany's only operational heavy bomber, the Heinkel He 177A. License-built versions of the DB 605 were used in the Macchi C.205, Fiat G.55, Reggiane 2005 and some other Italian aircraft. It was initially used in the pusher-design Swedish Saab J21. 42,400 DB 605s of all kinds were built. The primary differences between the 605 and 601 were greater displacement, higher revolutions, higher compression ratio and a more powerful supercharger. Through careful study the engineers determined that the cylinders could be bored out to a larger diameter without affecting the strength of the existing block.

The difference was minimal, increasing from the 601's 150 mm cylinder bore to the 605's 154 mm, but this increased the overall displacement from 33.9 litres to 35.7. Altered valve timing increased the inlet period and improved the scavenging to give greater volumetric efficiency at higher speeds, which improved the maximum allowable RPM from 2,600 in the 601 to 2,800 in the 605; the combination of these changes raised power output from 1,350 PS to 1,475 PS. Engine weight increased from 700 to 756 kg. In other ways the engine was identical to the 601, being a 12-cylinder, inverted-V design. Both used dual Bosch magnetos firing twin spark plugs for ignition. Fuel injection was powered by a pump supplying up to 90 bar and the oil system used three pumps with a separate 35-litre oil tank; the supercharger was advanced for the era in that it used a barometrically controlled hydraulic clutch which allowed the system to automatically compensate for changes in altitude. One major design difference was the switch from ball bearings to plain bearings which, when combined with poor grades of lubricants, led to serious problems in service, including engine fires.

Although Daimler-Benz redesigned the bearings and added oil slingers and their associated coolers, the RLM considered the DB 605 to be a "sick engine" and the problems had not been resolved by the end of the war. Like the 601, the 605 was designed to run on "B4" fuel with an octane rating of 87. In 1944 a series of newer engines was introduced, allowing the engine to run on the 100 octane "C3" fuel and optionally including fittings for various optional power-boosting agent dispensing systems, such as the MW50 methanol-water injection system, GM-1 nitrous oxide injection system; the DB 605AM, running on C3 and MW-50, saw power improved to 1,800 PS for takeoff. In mid-1944, the requirement for C3 was dropped and standard B4 fuel with MW-50 was used; the DB 605AS improved the maximum rated altitude by using a larger supercharger taken from the DB 603 but was otherwise similar to the A. The DB 605ASB's takeoff power was rated at 1,800 PS, while maintaining the high-altitude performance of the ASM.

The final version of the A-series was the DB 605ASC of 1945, which improved takeoff power to 2,000 PS. As early as 1942 Daimler had been working on an upgraded D-series engine that could run on either C2 or C3 fuel; the first of these, which appeared in late 1944, were a small series of DB 605DM, followed by the main production series, the DB 605DB/DC. These engines were fitted with an adjustable screw stop which allowed the use of either B4 fuel with MW-50, or C-3 fuel without MW-50, in which case the engine was designated DB 605DB, or the use of C-3 fuel with MW-50, in which case the engine was given the -DC suffix instead. In its DB-suffix form the engine generated 1,800 PS for take-off at 1.8 ata, while the DC was capable of 2,000 PS at 1.98 ata. If MW-50 was not available for use with the B4 fuel the throttle was limited to 1.45 ata for the entire flight. Thus, this series was ideally suited to catering for the chaotic fuel supply situation prevalent during the last months of the Third Reich.

These engines were used in the Bf 109G-10 and K-4 series. One unusual application of the DB 605 came in the form of a captured Supermarine Spitfire; the aircraft was operated by the Luftwaffe until 14 August 1944, when it was destroyed during a USAAF bombing raid. Production versions DB 605A Standard fighter engine, up to 1475 PS, 605 AM with MW-50 system up to 1800 PS DB 605AS Altitude optimized version of 605 A using the larger DB 603 supercharger, up to 1435 PS, ASM with MW-50 system and up to 1800 PS DB 605ASB Altitude optimized late-war version of 605 AS using B4 fuel, ASBM with MW-50 system and up to 1800 PS DB 605ASC Altitude optimized late-war version of 605 AS using C3 fuel, ASCM with MW-50 system and up to 2000 PS DB 605B Same as 605 A but for use in twin-engined aircraft like Messerschmitt Bf 110, Me 210 DB 605BS proposed version for twin-engined aircraft, derived from DB 605 AS DB 605DB Improved 605 DM, standard MW-50 equipment, first version up to 1850 PS reduced to 1800 PS, B4 fuel DB 605DC Improved 605 DM, standard MW-50 equipment, up to 2000 PS, C3 fuel DB 605DM First

Copa Princesa de Asturias

The Copa Princesa de Asturias de Baloncesto is an annual 2nd-tier level national cup competition for Spanish professional basketball teams, organized by Spain's 2nd-tier level professional league, the Liga Española de Baloncesto. It was first played in 1987. Since 2009, at the end of the first half of the season, the top two teams from the LEB Oro qualify; the Final is at champions venue. In 2015, the cup changed its name from Copa Príncipe de Asturias to Copa Princesa de Asturias, as Leonor de Borbón became Princess of Asturias. 3: Joventut 1987, 1989, 1991 1: FC Barcelona 1988 1: Estudiantes 1986 1: Baskonia 1985 Since 2009, the Copa Príncipe de Asturias is only played with the two top teams at the first half of the LEB Oro season History of Copa Príncipe in All results of Copa Príncipe