turn indicator

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Related to turn indicator: Turn and bank indicator
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Turn Indicator


an aircraft gyroscopic device that indicates the deviation of an aircraft from a straight-line course.

A turn indicator is based on the ability of a gyroscope with two degrees of freedom to superpose the angular velocity vector of the gyroscopic rotor’s own spin and the angular velocity vector of the rotation of the device’s case. The spin axis of a turn indicator’s rate gyroscope is horizontal and at a right angle to the fore and aft axis of the aircraft; the axis of the gimbal in which the rotor spins is parallel to the longitudinal axis of the aircraft. Unlike a compass, a turn indicator responds only during a turn. The angle of deviation of the gyroscopic gimbal and the pointer connected to it depends on the aircraft’s turn rate. (See alsoGYROSCOPE.)

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

turn indicator

An instrument that displays the aircraft's rate and direction of turn. See turn and slip indicator.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
The vehicle features a conventionally-lit headlamp with twin pilot lamps that are flanked by turn indicators, which also consist of halogen bulbs, single-piece seat along with a sharp tail section that houses its split tail lamp setup.
The special model will also come with specially designed bonnet stripes and 17-inch light alloy wheels and will have 60 Years emblems on the left-hand bonnet stripe, the side scuttles of the turn indicators and an LED logo puddle lamp which will be projected from the driver's door.
The vehicle comes with several convenience features that include power-foldable orvms with side turn indicators and entry assist lamp, follow-me-home & lead-me-to-vehicle headlamps, service reminder, cooled glove box, sunglass holder, conversation mirror, cup-holders in every row and bottle-holders on all 4 doors, multiple charging and media outlets.
The two-wheel vehicle also offers powerful braking with an anti-lock braking system, light-emitting diode (LED) daytime running light, LED turn indicators, several riding modes, reverse assist and torque control assist.
Contrasting red stitching on the seat, rear spoiler, passenger seat cowl, aluminium footplates and micro lamp LED turn indicators top off the sporty lines.
HUD has more navigation detail than other portable display systems, showing turn indicators, distance to the next turn, current speed and speed limit, and estimated time of arrival.
AyazHafeez Senior General Manager Sales and Marketing highlighted the new added features like Chrome grill new bumpers elegant rear lights integrated tuner keyless entry and side mirror turn indicators etc.
Also, SZ4 adds navigation and DAB digital radio as standard to the specification that includes automatic air conditioning, electric rear windows, rear privacy glass (five-door models), pushbutton keyless start, automatic headlamps, cruise control and heated mirrors with integrated turn indicators. Amethyst Grey Pearl Metallic has been added (except for Sport models), which brings the total of colours in the range to eight - six metallic and two solid.
The exterior styling of the popular and dependable Figo has been further enhanced with a sleek-looking chrome signature fender badge and turn indicators on power mirrors to add to its premium appeal," the statement added.
Well, that's not entirely accurate as, since September 1, 1965, all new cars must have flashing turn indicators.
Missing too are the turn indicators from the outside rearview mirrors.
The updated Chevrolet Cruze with all new Gen2 automatic transmission returns improved fuel economy and also provides turn indicators on outside rear view mirrors, both of which are crucial for Indian road conditions," explained Rajesh Singh, Vice President, After Sales, Marketing and Sales, General Motors India.