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For the 1956 season, the much improved 550A/1500RS was introduced. Better known as the '550 RS' in the U.S., it's visually similar to the 550 spyder but the chassis underneath is completely new. The ladder chassis of the old Spyder was gone, It now has a tube frame structure designed to dramatically reduce the torsional flexibility. At the same time, the rear suspension was completely revamped, although still a swing arm design, an anti-roll mechanism was added, improving the grip of the rear end under cornering. Finally, the 4-cam engines performance were significantly enhanced with crankshaft mounted distributors, higher compression, and new Weber carburetors, good for 23 more HP than the original 547 engine.
With a low first for quicker starts, the recently introduced five-speed gearbox was fitted as standard on the 550As.
The body looked much the same at first glance, but, mainly to save weight, the hinged back was dropped in favour of a fixed panel with louvered inspection hatches behind each door. Smaller lighting units, front and rear, and repositioning of the two grilles on the back of the car also acted as handy distinguishing features, whilst closer inspection revealed a more aerodynamic nose profile.
In the second race of the season, the 1,000 km of Nurburgring, S/N 0101 finished first in class and fourth overall, driven by Wolfgang von Trips and Umberto Maglioli.
A few weeks later, a works 550A single-handedly driven for more than 7 hours by Maglioli won the Targa Florio, beating all the Ferrari and Maserati entries, it was Porsche greatest victory to date at the time.
More importantly, the 550A proved that Porsche's concept of small engine in a lightweight car could do much better than class wins, and in fact, on certain tracks these remarkable little cars were more than capable of winning overall.
Ensyuya (Mitsunari Ishii) : Project lead, 3d Model, textures, animations, shaders, sounds
Patrice Cote : Physics, UI car history, historical liveries from No.5 to 21
The engine sound has been made by Ensyuya from scratch build completely.
Other sound samples are recorded by Ensyuya from real classic VWs or Kunos original ones.
Polycounts and distance for optimization are about
Equivalent to previously released 550 mod of following.
LOD A 168100 0m
LOD B 90016 5m
LOD C 37554 24m
LOD D 4243 48m
Damage model function fully works.
550A spyder mod got all functions that should be in this mod. All functions Kunos implemented in AC are working properly.
Benchmark of 550A/1500 RS Spyder mod
Equivalent to previously released 550 mod.
Ensyuya, Patrice Cote, Oct 9, 2016
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