The first airliner with a pressurized cabin to enter service was the Boeing Model 307 Strato-liner, the prototype of which was flown for the first time on 31 December 1938. Derived from the B-17 Flying Fortress bomber, it was advertised as the first airliner to fly above most bad weather conditions because of its pressurized cabin. The first version to enter service, with Trans-Continental and Western Air in April 1940, was the Model 307B, accommodating 33 passengers.

Showing All Files In: Aviation Design/ Tools (aeronautics - airfoils)

Aviation Design/ Tools (aeronautics - airfoils) » Airfoil plotting software

 Profile - A great little program to display and print/plot airfoil templates for aircraft designs.
Simple, fast and extremely accurate - any airfoil you want from .dat and .cor files.
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Aviation Design/ Tools (aeronautics - airfoils) » Complete Airfoil Archive

 Airfoil Archive: The most complete airfoil collection available. (approx 2000 airfoils) Includes Clark, NASA etc.
The airfoil profiles are in a lot of ways considered the heart of the aircraft. A good airfoil is critical in attaining the desired aircraft performance.

Aviation Design/ Tools (aeronautics - airfoils) » Professional wind tunnel

 Plans to construct your own professional wind tunnel. Designed by NASA Low cost project (can be built for less then US$ 250.00) This was designed to produce a steady airflow with no turbulence in the testing area. Designed to test scale model/s of your airfoil, fuselage, canopy etc.