The wing tip flare, Mark I, is designed after the "Holt landing flare," which has been extensively used by the British and French since the beginning of practical night flying.


DESCRIPTION

The Mark I wing tip flare consists of a cylinder about 4 inches long by 2 1/2 inches diameter, filled with a charge of magnesium illuminating,. material giving approximately 20,000 candlepower for 60 seconds. A little strontium nitrate imparts a reddish tinge to the light so as to make it an easier color for the eyes. The cylinder is held in a streamlined steel holder. Two brackets are generally carried, one fastened to the main spar underneath each lower plane about 3 feet from the end. Ignition is caused by an electric fuse operating on a circuit from the lighting generator or dry batteries, and controlled by a push button switch in the pilot's cockpit.


USE

Wing tip flares are used for facilitating night landings in case of a forced landing or in conjunction with the ground lights when the latter are insufficient. One flare gives ample light to enable the pilot to accurately juidge his distance from the ground and the second should be held in reserve. These flares should never be used if there is any fog or mist near the ground as the light is strongly reflected by fog to such an extent as to dangerously dazzle the pilot's eyes. It is also advisable to blacken the under surface of the lower planes and the back of the propeller in order to minimize reflection.