Crossword clues for dihedral
The Collaborative International Dictionary
Dihedral \Di*he"dral\, a. [Gr. di- = di`s- twice + ? a seat, bottom, base, fr. ? to sit. Cf. Diedral.]
Having two plane faces; as, the dihedral summit of a crystal.
Of a kite or an a["e]roplane, having wings that make with one another a dihedral angle, esp. when the angle between the upper sides is less than 180[deg].
-
(A["e]ronautics) Of wing pairs, inclined at an upward angle to each other.
Dihedral angle, the angular space contained between planes which intersect. It is measured by the angle made by any two lines at right angles to the two planes.
Wiktionary
a. 1 (context mathematics English) Consisting of, relating to or contained between two plane surfaces. 2 (cx of a kite or an aeroplane English) Having wings that form a dihedral angle, especially when the angle between the upper sides is less than 180°. 3 (cx aviation English) Of wing pairs, inclined at an upward angle to each other. n. 1 (context mathematics English) An angle between two plane surfaces 2 (context aeronautics English) The upward slope of an aircraft's wing 3 (context chemistry English) The angle between pairs of chemical bonds separated by a third bond
Wikipedia
Dihedral angle is the upward angle from horizontal of the wings or tailplane of a fixed-wing aircraft. "Anhedral angle" is the name given to negative dihedral angle, that is, when there is a downward angle from horizontal of the wings or tailplane of a fixed-wing aircraft.
Dihedral angle (or anhedral angle) has a strong influence on dihedral effect, which is named after it. Dihedral effect is the amount of roll moment produced per degree (or radian) of sideslip. Dihedral effect is a critical factor in the stability of an aircraft about the roll axis (the spiral mode). It is also pertinent to the nature of an aircraft's Dutch roll oscillation and to maneuverability about the roll axis.
Longitudinal dihedral is a comparatively obscure term related to the pitch axis of an airplane. It is the angle between the zero lift axis of the wing and horizontal tail. Longitudinal dihedral can influence the nature of controllability about the pitch axis and the nature of an aircraft's phugoid-mode oscillation.
When the term "dihedral" (of an aircraft) is used by itself it is usually intended to mean "dihedral angle". However, context may otherwise indicate that "dihedral effect" is the intended meaning.
Dihedral or polyhedral may refer to:
- Dihedral angle, the angle between two mathematical planes
- Dihedral (aircraft), the upward angle of a fixed-wing aircraft's wings where they meet at the fuselage, dihedral effect of an aircraft, longitudinal dihedral angle of a fixed-wing aircraft
-
Dihedral group, the group of symmetries of the n-sided polygon in abstract algebra
- Also Dihedral symmetry in three dimensions
- Dihedral kite, also known as a bowed kite
- Dihedral doors, also known as butterfly doors
- Dihedral prime, also known as a dihedral calculator prime
- In rock climbing, an inside corner of rock
Usage examples of "dihedral".
Zoyd described his inner feelings to Frenesi, having located her finally at the gigantic Dark Ocean Hotel, a towering dihedral wailful of 2,048 rooms with identical lanais cantilevered into blue space, all facing the Pacific.
The low wing had a 25-degree leading-edge sweep, a 3-degree dihedral from the roots, and low wing fences at midspan.
The forward wings locked with negative dihedral, the rear wings angled to form a ruddevator, and the five-bladed propeller whined, driving the butterflier in a shallow dive for the peninsula.
Stuka, the dihedral - gull-winged Junker 87 dive-bomber - was the most feared of all.
It seemed to be all engine, and, with the dihedral only on the lower wings, had a curious uneven look about it.
The forward wings locked with negative dihedral, the rear wings angled to form a ruddevator, and the five-bladed propeller whined, driving the butterflier in a shallow dive for the peninsula.
He hadnt understood a word of the mans discourse, which was all about eddies and chords and cambers and foils, dihedrals and the Bernoulli effect.
He hadn't understood a word of the man's discourse, which was all about eddies and chords and cambers and foils, dihedrals and the Bernoulli effect.
The old hands all believed that by screwing up the rigging wires and increasing the dihedral angle of the wings, they could put a few knots on their speed.
The vertical spine appears to be a dihedral with different illuminance on the two sides.