Boeing 929 Jetfoil is a passenger-carrying waterjet-driven hydrofoil. It was first flown in 1974, features two Rolls-Royce Allison 501KF gas turbine engines, and can carry up to 350 passengers while traveling at a 45 knot speed.
The Jetfoil uses gas turbine-powered water jet propellers to move forward, and its entirely submerged forward and aft foils, which are joined to the hull by struts, produce dynamic lift that allows it to fly above the water’s surface.
The motion of a jetfoil is very similar to that of an airplane. The corresponding flaps of the submerged foils, which are used for attitude control to maintain the hull at a predetermined height above the water’s surface and to steer the ship to port or starboard, are moved by the Automatic Control System (ACS).
Since sea water rather than air provides the Jetfoil’s dynamic lift, it can be thought of as a “airplane in the sea.” The jetfoil can fly slower and with smaller wings than an airplane because water is 800 times denser than air. Twenty of the 35 Jetfoils that are in use now worldwide were produced by the Boeing Company in Seattle, Washington, in the United States.
Let’s Watch Boeing 929 Jetfoil In Action in the video below:
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