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This is enabled by a revision of the powertrain calibration, which increases the redline from 6300 to 6400 rpm. Additionally, the Super Stock gains lightweight 18-inch wheels with the same drag radials as the Demon, along with a shorter final-drive ratio and drag-optimized suspension tuning for the Bilstein adaptive dampers in Track Mode.
A Townend ring is a narrow-chord cowling ring fitted around the cylinders of an aircraft radial engine to reduce drag and improve cooling. It was patented in 1929, and found use on various aircraft of the 1930s and into the 1940s.
Starting in 1972 tires were specified by load rating, using a letter code. In practice, a higher load rating tire was also a wider tire. In this system a tire had a letter, optionally followed by "R" for radial tires, followed by the aspect ratio, a dash and the diameter – C78-15 or CR78-15 for bias and radial, respectively. Each diameter of ...
The radial engine was enclosed in a NACA cowling to reduce drag. [5] Only two types of engines were offered – the unreliable 185 hp (138 kW) Curtiss R-600 Challenger , which was to be used only in the prototype, and several variants of the Wright Whirlwind family, ranging from 240 to 420 hp (180 to 310 kW). [ 6 ]
A cross-section of a tire. Number 12 indicates the radial ply. Numbers 14 and 16 are bias plies. A radial tire (more properly, a radial-ply tire) is a particular design of vehicular tire. In this design, the cord plies are arranged at 90 degrees to the direction of travel, or radially (from the center of the tire).
Model 34K, same as XP-6 but with untapered wings and wing radiators to reduce drag P-6A 18 ordered by the U.S. Army, nine were fitted with Prestone- rather than water-cooled V-1570 engines XP-6B P-1 converted to take the V-1670 engine P-6C cancelled XP-6D XP-6B converted to take a turbocharged V-1570-C P-6D