Hirth HM 508

The Hirth HM 508 was born 1936/37, at the Hirth Motoren GmbH in Stuttgart- Zuffenhausen. It was an air-cooled eight-cylinder 60 ° V engine with overhead cylinders ( cylinder head below), a reduction gear and a loader. Ultimately, the engine did not prevail, the Argus As 10 was the standard engine in its class.

Variants

The precursor Hirth HM 8

A precursor with 225 hp was under the name Hirth HM 8a (also 8U ) used in flight across Europe in 1934 next to the 215- hp Argus AS -17A engine in eight of 13 from the German side brought to the starting gates. Of the three 37 yet started under the designation M BFW Messerschmitt Bf 108 with Hirth engine Theo Osterkamp reached the second best German 5th place in front of his brand-mate Werner Junck. Best German was Hans Seidemann than 3 on a Fieseler Fi 97 with Argus engine. From this type every 5 machines came to the finish, with the Hirth engine ranks 9, 13 and 16, all four Klemm Kl 36 - two of them with Hirth engine - but resigned from

Use in Italian prototypes

A Ambrosini SAI.7 racing aircraft, powered by a Hirth HM 508D engine, achieved on 27 August 1939 a new class world record over 100 km on a closed course with 403.9 km / h In June 1940, the HM - 508D engine was also incorporated into the prototype of the Italian observation aircraft IMAM Ro.63 and AVIS C.4. Hirth 508 also received the prototype and six series machines coach Nardi FN.315, two of which were delivered to Switzerland.

Specifications HM 508C

  • Start Power: 200 kW at a speed of 3000 rpm
  • Travel Power: 158 kW at a speed of 2785/min
  • Capacity: 7.96 l
  • Stroke: 105 mm
  • Bore: 115 mm
  • Compression ratio: 6.2:1
  • Length: 1312 mm
  • Width: 683 mm
  • Height: 827 mm
  • Fuel: 87 octane minimum
  • Installed weight: 233 kg
Heinkel He 116 Focke-Wulf Fw 58 Gotha Go 146 Siebel Fh 104 Challenge International de Tourisme 1934 Argus Motoren
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