An airplane wing free body diagram illustrating forces acting on the wing.

"Differential Lens.—Horizontal divergence may be obtained to any required amount by varying the radius…

"Differential Lens.—Horizontal divergence may be obtained to any required amount by varying the radius…

"Differential Lens.—Horizontal divergence may be obtained to any required amount by varying the radius…

An illustration of stabilizing the plane by setting the back wing at less angle of incidence than the…

"The earth shown as it would be if its axis were perpendicular to the plane of the orbit." -Wiswell,…

"If two equal ellipses, each turning about one of its foci, are placed in contact in such a way that…

Illustration of the rolling of equal hyperbolas. If two equal hyperbolas are placed so that the distances…

Illustration of the rolling of equal parabolas. "The two parabolas may be considered as two ellipses…

The illustration shows the airplane's fin, or keel surface. The fin of the airplane is located on the…

A plane flying above land illustrating the use of ailerons to adjust the angle of incidence to adjust…

An airplane flying above the show illustrating the aerodynamics of the plane with the tail wing at the…

An illustration of the plane flying over land from point A to B by flying the plane with the direction…

The diagram illustrating an approximate angle of flying an aeroplane, or airplane, flying upside down…

The illustration of the plane descending while spiraling down. The radius of the spiral spin is getting…

Airplane flying almost sideway, called sideslip. The plane enters sideslip by lowering the wing and…

A sideslip of the plane with the rudder turned left so that the plane flying sideways with the nose…

The airplane is flying with the elevator depressed and rudder turned to recover the plane to the upright…

The illustration of the plane creating wash in and washout to reduce the lift distribution across the…

"An inclined plane is a slope, or a flat surface, making an angle with a horizontal line...the force…

"An inclined plane is a slope, or flat surface, making an angle with a horizontal line...the force acts…

"An inclined plane is a slope, or flat surface, making an angle with a horizontal line...the force acts…

"The part of any solid between two planes, which may be either parallel or inclined to each other: as,…

"The distance of A and B below H is indicated on the V projection. Thus if to A∧h B∧h the perpendiculars…

"The H projection of the line AB in the space is a line connecting the feet of all the perpendiculars…

A flying machine invented by William Henson in the mid-19th century. Although numerous attempts were…

Illustration of a right hexagonal pyramid that has been cut by a plane parallel to the base. The lower…

Illustration of a right hexagonal pyramid that has been cut by a plane parallel to the base. The top…

Illustration of a right hexagonal pyramid that has been cut by a plane parallel to the base. The top…

Illustration of a right hexagonal pyramid that has been cut by a plane parallel to the base. The top…

Illustration of a skewed hexagonal pyramid that has been cut by a plane parallel to the base. The top…

Illustration of the intersection of a hexagonal pyramid and a plane.

Diagram depicting a cone with both nappes intersected by plane J to form a hyperbola.

"Suppose the inclined plane, to be two feet from A to B, and one foot from C to B, then, as we have…

"This power, the most simple of all machines, consists of a hard, smooth, plane, inclined to the horizon…

"The power required to force a given weight up an inclined plane, is in proportion to its height, and…

"An inclined plane is a smooth, hard, inflexible surface, inclined so as to make an oblique angle with…

"One of the primary simple mechanical powers. The plane's surface is inclined to the horizon at any…

"A force pushing a weight from C to D, only raises it through the perpendicular height, E D, by acting…

Illustration of an irregular surface abdc projected upon the flat surface ABCD.

"Planes are to be met with in great variety, the most usual for ordinary carpentry being the jack plane."…

"In the ordinary pattern of a lapidary's bench the handle turns in a horizontal plane, where W is the…

This illustration shows three different views of the Lawson Type C-1 Twin Liberty Motored Aerial Transport.

"A lens is a transparent body the two refracting surfaces of which are curved, or one of which is curved…

"The shape of the double convex lens, d, c, is that of two plano-convex lenses, placed with their plane…

"a, prism; b, plane glass; c, spherical lens; d, double-convex; e, plano-convex, f, double-concave;…

To find the projections of a line which joins two points, A, B given by their projections.