Subscribers may view the full text of this article in its original form through ... The largest railroad tunnel in the world is nearly completed, through the the Cascade Mountains west of here.

Today, it is dwarfed by numerous other tunnels, including the Cascade Tunnel in Washington, at 7.8 miles. With upgrades and modifications, the San Fernando Tunnel is still in use today.

The transonic cascade wind tunnel (TGK) is installed at the Institute of Propulsion Technology in Cologne. This large-scale facility is used for investigations on compressor blade cascades; it is the ...

The wind tunnel has a test section with variable channel height and allows inflow Mach numbers up to Ma1 = 1.4 with very stable operating conditions, especially at sonic inflow (Ma1 = 1.0). The test ...