Nemere
Hungarian vintage sailplane
Constructed for the Olympic Games in Berlin, 1936.
First flight 25 July 1936.
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Designer: Lajos Rotter
Span: 20 m
Wing Area: 23 m2
Length: 8 m
Empty weight: 340 kg
Payload: 100 kg
Gross weight: 440 kg
Wing loading: 19,13 kg/m2
Best gliding ratio cca 26
Min sinking 0.63 m/s at cca 65 km/h
Sinkspeed at 140km/h cca 2 m/s.
The designer Lajos Rotter was one of the Hungarian gliding-pioneers. As very young engineer designed some motorplanes of very high aspect ratio, which were masterpieces in their own time, but the prohibition of motorflying after the WW I and the worldwide awakening of the motorless flying sport led him to soaring flight. He was the holder of the worlds 19th FAI silver C badge, constructed a fine sailplane by which in 1933 held a national duration record over 33 hours, only 3 hours less than the world record. In January of 1936 the Hungarian Aviation Association entrusted him to construct a high-performance sailplane for the popularization of soaring flight on the Olympic Games in Berlin. volt
The new plane, the Nemere became a mighty, graceful beauty one. Mr Rotter had the constructeurs-theory: the gliding speed of sailplanes must be increased, and gain the possibility of efficiently pulling up the plane for subseqent straightforward climbing. In addition the cockpit must be comfortable and roomy (he was a tall man) to handle whith maps and other navigation devices. The roomy cockpit had a streamlined canopy which made the form of the fuselage similar to the finest modern sailplanes. The wing profil was his own design and the ailerons could be moved inflight simultan too. This feature worked like camber flaps. The elevator was of a so called balance or all-flying style i.e. whithout stabilzer.
Only after six months the new plane was ready to fly. Without much experience with the plane, during the days of the Olympic Games, Rotter flew 326,4 km in 3h 53 min from Berlin-Rangfsdorf to Kiel-Holtenau. This brilliant goal-flight was in the year the longest soaring flight on the world ever and the first world record in soaring goal flight. In addition of this famous success the plane had so fine characteristics for at the time yet rarely practised highspeed cross-country flying, that during the flight the climbing-time/gliding-time ratio was 0.566. This is a number similar of which only R. Johnson reached in 1950 with his well-known RJ5. Perhaps Mr Rotter with his Nemere was the first gliderpilot on the world who consciously used the delphin-styl (after climbing in a thermal gliding with high speed to the next thermal where instead of circling gained height again with a pulling up to minimal sinking and so on again). With this method he reached on a 100 km distance, in a slight sidewind, 110 km/h average overground-speed. You can read about Mr. Rotters excellent flight in Wolf Hirth's book: Handbuch des Segelfliegens (1939).
More technical and historical details of the Nemere see in my book about Hungarian sailplanes: "Magyar vitorlázó repülõgépek", 1988. Budapest and the Hungarian Gliders site: http://web.axelero.hu/fegagu .
This model for FS2000 were made on the basis of original drawings of the designer Mr Rotter. The FSDS2 model has animated ailerons, elevator and rudder. I made the panel from Mr Rotter's original photo with contemporary metric instruments (see panel.txt) . Flight dynamics is based on the FS default which I tried to modify in accordance of the original datas. The 20 m span Nemere were a pilot-friendly plane. You could spiralling between 55 and 80 km/h very well, but remember: in the early times the controls of the sailplanes were not so sophisticated as today. So at higher speed, over 110 km/h you could feel some forces on the aileron. The real Nemere started from a dropable wheelpair and landed on a skid. Sorry, but with this first model version I omitted this and you can both launch and land on the skid. The self-launching is made by the VET-technic (see panel.txt). The Nemere did not have a spoiler but landed with sideslipping. For those, who like this feature of the vintage planes, I put an autocrd.gau to the panel to make easier switching between coordinated and uncoordinated control.
Credits to the authors of items used to my model see panel.txt.
Legal stuff / Copyright:
This is FREEWARE so honestly don't make any money with this.
The copyright is mine so make without my written expression no any modification and/or commercial distribution on any dataholder.
I do not accept any liabilty if some misfunction happens to your system.
If you have remarks or questions, my e-mail: gaborsm@axelero.hu
