Cavitating propeller in a water tunnel experiment at the David Taylor Model Basin

The momentum theory or disk actuator theory — a theory describing a mathematical model of an ideal propeller — was developed by W. J. M.

In 2002 a Japanese group propelled a tiny aluminium airplane by using a laser to vaporize a water droplet clinging to it, and in 2003 NASA researchers flew an 11 ounce ( 312 g ) model airplane with a propeller powered with solar panels illuminated by a laser.

He showed an interest in aeronautics from an early age, and he collected magazines and pictures about aviation, in addition to making model aircraft and his own propeller.

He was first to introduce surface drive on a Vee hull ( propeller hub above the water line ) to model boating which he named " SPD " ( surface planing drive ) as well as numerous products and developments relative to gasoline powered model boating.

An unusual form of four-stroke model engine that uses what is essentially a sleeve-valve format, is the British RCV series of " SP " model engines, which use a rotating cylinder liner driven through a bevel gear at the cylinder liner's " bottom " and, even more unusually, have the propeller shaft — as an integrally machined part of the rotating cylinder liner — emerging from what would normally be the cylinder's " top " at the extreme front of the engine, achieving a 2: 1 gear reduction ratio compared to the vertically oriented crankshaft's rotational speed.

The same firm's " CD " series of model engines use a conventional upright single cylinder with the crankshaft used to spin the propeller directly and also use the rotating cylinder valve.

The models are powered with loops of rubber matched to the weight of the model and the diameter and pitch of the propeller.

A kill in a dogfight is achieved by damaging the opponent's model with the propeller of the attacking model.

Because the plane had been designed for the Swedish Air Force they were considerably more powerfully armed than the U. S. model, which carried only two. 30-caliber machine guns firing through the propeller.

In 1996, Herpa Wings offered propeller driven planes for the first time in the 1 / 500 scale with the release of a ATR-72 model.

The towing carriage can either tow the model or follow the self-propelled model, and is equipped with computers and devices to register or control, respectively, variables such as speed, propeller thrust and torque, rudder angle etc.

With or without a ship model, the propeller, attached to a dynamometer, is brought into the inflow, and its thrust and torque is measured at different ratios of propeller speed ( number of revolutions ) to inflow velocity.

An early successful model aircraft with a pusher propeller was the rubber-powered " Planophore ", by Alphonse Pénaud, 1871.

A Hamilton Standard variable pitch propeller on a 1943 model Stinson Reliant | Stinson V77 Reliant

* It is ' Mother ' Cox rather than Hart who narrowly avoids death when his early model Hurricane loses its wooden propeller in flight.

Later hulls in the series include a tunnel over the propeller, and a determined " lightening " program made later Nordhavn 35s faster than the originals, but the 35 never truly gained market traction and the company discontinued the model after 23 were built.

In fluid dynamics, the momentum theory or disk actuator theory is a theory describing a mathematical model of an ideal actuator disk, such as a propeller or helicopter rotor, by W. J. M.

Except for the scale model Super Cub, the aircraft are patterned around the same basic design which is that of a high wing, experimental-style " pod and boom " blow-molded plastic fuselage with a direct-drive pusher propeller and v-tail.

This cellular matrix powder was used to regrow the finger of Lee Spievak, who had severed half an inch of his finger after getting it caught in a propeller of a model plane.

Water is directed tangentially through the wicket gate and spirals on to a propeller shaped runner, causing it to spin.

Water propulsion was by a PTO driven propeller.

Four German sailors were found in Nicosians engine room and propeller shaft tunnel, and were killed.

Fullscale wind tunnel investigation of the canard Rutan VariEze showed a propeller efficiency of 0. 75 compared to 0. 85 for a tractor configuration-a loss of 12 %.

The gearbox is directly behind the engine, and a tubular propeller shaft, under the transmission " tunnel ", transmits the drive to a solid live rear axle.

The propeller was partially enclosed in a tunnel to protect it against submerged objects.

Warm air could also be directed to the rear passengers through an outlet situated on the propeller shaft tunnel cover between the two front seats.

There is a propeller ( or pump jet ) at the rear and various hydrodynamic control fins as well as ballast tanks.

1770: James Watt applies the first screw propeller to an early steam engine at his Birmingham works, thus beginning the use of an hydrodynamic screw for propulsion.

| number of props = 3 or 4-blade de Havilland or Rotol propeller

| max speed main = 412 mph with Sabre IIB & 4-bladed propeller

| propeller or rotor ?= propeller

| propeller or rotor ?= propeller

| propeller diameter main =

| propeller diameter alt

| propeller or rotor ?= propeller

| propeller diameter main = 13 ft 6 in

| propeller diameter alt = 4. 11 m

| power more = driving a two-blade propeller

| propeller or rotor ?= propeller

| propeller diameter main = 3 m ( 9. 84 ft )

| propeller or rotor ?= propeller

| propeller diameter main =

| propeller diameter alt =

| propeller or rotor ?= propeller

| propeller diameter main = 13 ft 6 in

| propeller diameter alt = 4. 11 m