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Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B64—AIRCRAFT; AVIATION; COSMONAUTICS
  • B64C—AEROPLANES; HELICOPTERS
  • B64C25/00—Alighting gear
  • B64C25/68—Arrester hooks

Definitions

• the approved practice at present is to mount above the landing deck spaced series of cables-a longitudinal series which are tightly stretched in horizontal position at a height of about eighteen inches and, substantially midway between such longitudinals and the deck, a few, for instance three, transverse cables which are 'yieldingly held in horizontal position by passing their weighted ends over pulleys at the sides-and to equip the airplanes with a number of small anchors or double-pointed grappling hooks which hang from the spacer-bar, of the forward landing gear in position, when the wheels are running upon the .deck, to engage the longitudinal cables and so hold the airplane down to the deck and with a single long-shanked hook which at its forward end is mounted by universal joint (to allow for a possible side drift) on a bottom stanchion of the machine some seven or eight feet from its stern post and which is brought back and held up against the bottom of the airplane when not require but when about to alight is released and swings down, between two of the longitudinals, to catch one or another of the
• My present invention which has the same end in View, c0nsists, briefly, in shifting the point of attachment of the arresting hook from the usual point, some seven or eight feet in front of the stern post, back to the tail of the machine, pivotally mounting it, for example, upon the lower end of the stern post, straddling the tail skid.
• the hook is drawn back and held in rearwardly extended position or, if preferred, may be swung forward and upward against the bottom of the machine and there releasably held in place.
• Figure 1 is a view, in side elevation, of the rear or tail end of the body framework .of an airplane carrying a suitable 'tail skid and equipped with an arresting hook illustratrng one specific embodiment of my invention
• Fig. 2 is a plan view of the same, wlth certain parts omitted for the sake of clearness
• Fig. 3 is a view similar to Fig. 1, but showing a modification both of the hook itself and of the mounting thereof upon the framework
• Fig. 4 is a section on d the line 4 4 of Fig. 3
• Fig. 5 is a detailed view, partly in rear elevation and partly in section, of parts shown in Figs. 3-and 4:
• Fig. 6 is an enlarged broken detail showing in perspective a means for releas ably securing the arresting hook to the bottom of the airplane.
• the skid is normally held in the position shown, against a bufi'er 6 mounted on-the guide-rods 5 5 between which its forward lever-arm swings, by a rubber band or other shock absorber 7 which at one end is attached to the framework and at its other end is connected by the link 8 to this end of the skid.
• the skid will, however, rock to the position indicated in dotted lines (Fig. 1) whenever the upward pressure upon its outer lower end is suificient. to fully ex-v tend the shock absorber.
• the arresting hook 10 of the usual or of any suitable construction, is pivoted at the end of its shank 11, to swing laterally,'to a yoke 12 the arms of which'straddle and are pivoted to the fitting 3, above the pivotal mounting of the skid, to swing thereon in a fore and aft vertical plane below and to the rear of the machine.
• the shank of the arresting hook is yieldingly held in alignment with the yoke by springs 13 13 which are attached to the two arms of the yoke and bear against the sides of the shank.
• One arm of the yoke is extended forwardly, parallel to a lower longron, to provide a lever arm 14;
• Such downward movement may carry the tail of the machine So close to the landing deck, indicated by the dotted line a a, as to bring the skid into action, or even to force the ski-d and the hook to the extreme positions indicated in dotted lines, whereupon the tail will rebound but, raising the shank of the hook and thereby increasing the angle of its line of pull, will again be drawn partially back.
• The. forward movement of the machine will thus be quickly and smoothly arrested with the tail in the position shown with respect to the line of the deck represented by the dash and dot line b b, where the pull of the hook is projected forwardly through the center of'gravity of the machine.
• arresting hook can readily be attached to an airplane and as readily removed if its use is not required.
• the forward extension of one arm of the yoke is omltted, and in place thereof two shaped members 17 17 of inverted U- section, are mounted each with its sides straddling an arm of the-yoke, upon the pin with which the yoke is pivoted to the fitting 3 and are braced by securing their forward flattened ends by screws or otherwise to the fittings which join a bottom stanchion 2 to the lower longrons.
• the rear portions of these members extending backward from the stern-post at a slight upward angle directly above the arms of the yoke, serve as a stop to prevent the shank of the hook from being thrown up high enough to foul the rudder. They, as well as the hook, are readily removable.
• a landing gear comprising a tail skid and an arresting hook which is capable of some lateral movement and the shank of which is pivotally mounted, to swing in a fore and aft vertical plane, upon the frame at the tail of the machine by a fitting adapted to straddle the outer end of the skid.
• a landing gear comprising a tail skid and an arresting hook which is capable of. some lateral movement and the shank of which is mounted, to swing in a fore and aft vertical plane, by means of a yoke with arms straddling and pivoted to the lower end of the stern post" and of a length to permit of the passage therebetween of the outer end of the skid.
• an arrestin "gear comprising a hook the shank of Whic is mounted upon a' frame member at the tail of the machine to swing below and to the rear thereof and which is normally but yieldingly held in the vertical plane of the longitudinal axis of the machine.
• an arresting gear com prising an arresting hook having a pluralpointed head and a stifi metalliccable shank v I a which is mounted upon a frame member of the machine to swing in a foreand aft vertica'l plane below the bottom line of the machine.
• a landing gear comprisprising an arresting hook having a pluralpointed head and a cable shank which is mounted, to swing in a fore and aft vertical plane, by means of a yoke with arms straddling and pivoted to the lower end of the stern post of the machine.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Aviation & Aerospace Engineering (AREA)
• Toys (AREA)

Description

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=24770217

Family Applications (1)

Country Status (1)

Cited By (8)

• 1924
  • 1924-02-01 US US689877A patent/US1647619A/en not_active Expired - Lifetime

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