OPEL 500 – year 1928
Manufacturer: Adam Opel AG, Motorradabteilung, Russelsheim nad Menem, Germany
In years 1928-1929 Opel did not produce serial motorcycles - it was focused on the production of a four-wheeled novelty - a small vehicle called "Laubfrosch” (green frog). However, she did experiment with motorcycles. Some attempts were made to. use rocket propulsion. Experimental model 500 with 1928 year except engine with overhead valve (OHV) had, on both sides of the rear wheel, two rocket motors are attached. However, these attempts did not live up to expectations.
The return to motorcycle production at Opel took place only in 1929 year, when a license for pressed steel frames was purchased from Ernest Neumann-Neander. Within this framework, own engines with displacement were assembled 494 cm3 with lower timing- and overhead valve (OHV).
Opel 500 had a single cylinder engine with OHV overhead valve, of a capacity 494 cm3 (cylinder diameter and piston stroke - po 84 mm), who was gaining power 10 kW (14 KM) at 3000 rpm. The mixture was ignited by a spark-ignition installation. The gearbox had three gear ratios. The drive to the rear wheel was transmitted via a chain. Frame made of steel profiles, embossed, it was equipped with a Neander front fork, sprung on two short leaf springs (arranged in sheet metal covers along the fork axis, on both sides of it, at the height of the head of the frame). Characteristic saddle, shaped like a fuel tank, it resembled a solution from a Neander motorcycle. Both wheels had independent brakes. The motorcycle had a curb weight 140 kg and developed maximum speed 100 km/h. Model 500 with the OHV overhead valve was then sold for 1265 marek. The first vehicles came from the Elite-Diamant-Werke factory in Brand-Erbisdorf, Saxony, whose largest shareholder was Fritz von Opel. After selling this factory to Rasmussen, motorcycle production was moved to the plant in Russełsheim, where it continued for two more years.
W 1930 In the year, the third and final stage of Opel motorbike production definitely ended. The company became part of the largest American (and the world) car concern General Motors Corporation and took up the production of cars.