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Automotive aerodynamics is studied using both computer modelling and wind tunnel testing. For the most accurate results from a wind tunnel test, the tunnel is sometimes equipped with a rolling road. This is a movable floor for the working section, which moves at the same speed as the air flow.
Wind Shear's tunnel is a closed air circuit, temperature-controlled system built around a rolling road. The rolling road, akin to a giant treadmill, is 10 ft wide by 29.5 ft long (3 m x 9 m) and accommodates full-size cars. Air and rolling road speeds are coordinated up to 180 mph (80 m/s).
New York City water supply system tunnels 1 and 2; New York City Water Tunnel No. 3; Otisville Tunnel on Erie Railroad, Otisville, Orange County [35] Shandaken Tunnel, New York City water supply system, between Schoharie Reservoir and Esopus Creek; State Line Tunnel, Canaan, on the Boston and Albany main rail line.
The tunnel system is a far cry from the lofty, high-speed, and autonomous hyperloop system Musk initially hoped to build with his tunnel-digging venture. Musk had envisioned sci-fi systems for ...
Some cars include additional rear center console, which commonly includes entertainment and climate system controls (and possibly display screens and air vents), auxiliary power outlets, and sometimes window controls when these are not in the doors (for example, in the Ford Sierra). Another element is an ashtray, though this is now less common ...
A TikTok from user @engineer.everything recently went viral after she posted a one-year recap of her progress building an underground tunnel system beneath her home. In the video, she takes us ...
Daiyunshan Tunnel China 5.850 km (3.6 mi) [dj] 2017 2 G2517 Shaxian-Xiamen Expressway: Lianghekou Tunnel China 5.840 km (3.629 mi) 2010 1 Lianghekou Hydroelectricity Power Station Road Shixia Tunnel China 5.833 km (3.6 mi) [dk] 2018 2 S3801 Beijing-Chongli Expressway Jiangjunshi Tunnel China (Sichuan-Gansu)
The tunnel was powered by a pair of fans driven by 4,000 hp (3,000 kW) electric motors. The layout was a double-return, closed-loop format and could accommodate many full-size real aircraft as well as scale models. The tunnel was eventually closed and, even though it was declared a National Historic Landmark in 1995, demolition began in 2010.