propulsion duct
71Chaetognatha — Arrow worms Temporal range: Lower Cambrian–Recent …
72Tetrapod — Taxobox name = Tetrapods fossil range = Late Devonian to Recent image width = 200px image caption = A Fire Salamander. regnum = Animalia phylum = Chordata subphylum = Vertebrata superclassis = Tetrapoda superclassis authority = Broili, 1913… …
73Nautilus — For other uses, see Nautilus (disambiguation). Nautilus Temporal range: Triassic–Present[1] …
74National Advisory Committee for Aeronautics — NACA redirects here. For other uses, see NACA (disambiguation). National Advisory Committee for Aeronautics NACA The official seal of NACA, depicting the Wright brothers first flight at Kitty Hawk …
75List of electronics topics — Alphabetization has been neglected in some parts of this article (the b section in particular). You can help by editing it. This is a list of communications, computers, electronic circuits, fiberoptics, microelectronics, medical electronics,… …
76Euler equations (fluid dynamics) — In fluid dynamics, the Euler equations govern inviscid flow. They correspond to the Navier Stokes equations with zero viscosity and heat conduction terms. They are usually written in the conservation form shown below to emphasize that they… …
77Combined cycle — Thermodynamics …
78XF2R Dark Shark — Infobox Aircraft name = XF2R Dark Shark type = Fighter manufacturer = Ryan Aeronautical Company caption = designer = first flight = introduced = retired = status = Cancelled primary user = more users = produced = number built = 1 prototype unit… …
79Thrust reversal — Thrust reversal, also called reverse thrust, is the temporary diversion of an aircraft engine s exhaust or changing of propeller pitch so that the thrust produced is directed forward, rather than aft. This acts against the forward travel of the… …
80Thrust-to-weight ratio — is, as its name suggests, the ratio of instantaneous thrust to weight (where weight means weight at the Earth’s surfaceSutton (7th edition pg 442) thrust to weight ratio F/Wg is a dimensionless parameter that is identical to the acceleration of… …
