Nov. 5, 1946. ’ J A, BACKSTROM ’ 2,410,622‘; AIRPLANE WHEEL ‘ATTACHMENT Filed Apr'il 16, 1942' l ' ' INVENTOR. ji L?‘Bac?‘s/trom, ATTORNEY Patented Nov. 5, 1946 than ‘UNITED ATEN-T F" l? 2,410,622 AIRPLANE, WHEEL ATTAGHMEN'E. AdolphBackstmm, H'empstead‘, N. Y. Application April 16, 1942,1SeriaiNo; 4395255.,‘ 2 Glaims. l (or. 244_103) 2 the wheel 7 through the medium of bolts or the airplane wheels to automatically initiate rota like Hi. The annulus 9 may be of a cross section, substantially as illustrated in Fig. 5, the outer pe tional movement of wheels, in advance of landing, riphery being channeled, for a purpose more fully to eliminate abnormal tire wear and so called hereinafter apparent. The inner wall ll of the “bald spots” on the tires. annulus is provided with openings 92 arranged at Many attempts have been made in this art to intervals and adapted for the reception of bolts equip airplanes with means operable to set up ro Ill. The bolts may be engaged with the disc or tation of the Wheels while the airplane is in the other part of the wheel l in any desired manner. air, but all have failed of adoption; there is press ently a greater need for a device of this char 10 Reinforcing webs l3 extend from the W211 ll in engagement with the bottom of the channel of acter than ever before because of the unusual the annulus. I landing stresses imposed on the tires of bombers The base of the channel is provided with an and like heavy air vehicles employed in the pros opening Ill between each pair of webs l3, adapted ecution of the war. It is the object of my in; for the reception of one end of a vane or ?nger vention to equip the wheels of airplane landing it, Each vane is pivotally mounted on a pin is gear with air impinging members which auto in close proximity to one of its ends, one end is matically come into operation, when the wheels enlarged, as indicated at H. One of the walls are in operative position for landing, to begin of each of the enlarged ends H is equipped with a rotation of the wheels before ‘the wheels contact spring I B, the latter being engageable with the the runway. A further object is to provide means applicable base of the channel of the annulus when the vane is in an operative position. The air engaging face to standard air vehicles including both ?xed and of each vane or ?nger is longitudinally concaved, retractible landing gear, the means being of a ‘ This invention comprises an attachment for providing a cupped or dished-out surface for construction to set up a minimum of parasite re sistance or drag when not in use, when applied to 25 better air purchase. The outer terminal of each vane or ?nger is pressed outwardly to provide a ?xed landing gear being su?‘iciently compact to cup-like terminal l9 to facilitate dislodgement of fold with the retractible landing gear. the vane. Where this attachment is used on re Other objects of this invention will be apparent tractible landing gear, ample space is provided in from the present preferred form of the invention, taken in connection with the accompanying draw 30 the airplane to stow the attachment with the landing gear without any alteration of standard ing, wherein Fig. 1 is an elevational view of an attachment constructed in accordance with the present in vention, illustrating its application, parts thereof being broken away to disclose details; airplanes. When using the invention on a re tractible landing gear, it is manifest that as soon as the landing gear has been moved into an oper 35 ative position, the attachment of this invention is correspondingly brought into position to be im Fig. 2 is a detail fragmentary sectional View pinged by the air. Contact of the air with the taken on the line 2-—2 of Fig. 1, looking in the vanes initiates rotation of the wheels and this direction of the arrows, showing one of the air rotation continues during ?ight, the direction of impinging vanes or ?ngers in operative position; Fig. 3 is a detail fragmentary enlarged sectional 40 which is indicated by the arrow in Fig. 1, so that when the airplane lands. the wheels will be rotat View of the device showing the manner of mount ing one of the vanes or ?ngers on the wheel en gaging ringr or annulus; ing at approximately the air speed of the air plane. This is accomplished by varying the size of the vane. This minimizes wear on the tires, Fig. 4 is a transverse sectional view of one of the vanes or ?ngers taken on the line 4—4 of 45 in addition to minimizing the possibility of turn overs when the airplane encounters inequalities in the road of travel. As is apparent from Figs. 1 and 2 of the drawing. the outer terminals of the nulus per se. In order to illustrate the application of this vanes, when in use, fall short of the outer periph invention, I have in the drawing shown a portion 50 ery of the tire, thereby avoiding contact of the of an airplane landing gear generally designated vanes with the runway. The springs 13 absorb shock when the vanes are swung into use and pro-_ 6, having associated therewith a wheel of stand vide a cushion for the vanes during the operation ard construction ‘I, the latter including a tire S. The device of my invention comprises a ring of the latter. As is apparent, as the vanes are or annulus 9 which is detachably engaged with carried upwardly, during the cycle of rotation, Fig. 1, looking in the direction of the arrows; and Fig. 5 is a transverse sectional view of the an l 2,410,622 4 the vanes automatically gravitate into a folded or inoperative position substantially as shown in Fig. extends through one of the-openings in the chan beyond its vertical axis, the vanes automatically nel base, the terminal of each vane being en larged, said vanes being movable consecutively into operation with each cycle of rotation of the gravitate into an open or operative position as Wheel. 1. On the descent, after the wheel has moved , also shown in Fig. 1. It is of course to be understood that various changes may be made in the details of construc tion, proportion and arrangement of parts within the scope of the claims hereto appended. I claim: 1. In combination with an airplane equipped with Wheeled landing gear, a ring detachably en ' 2. In combination with an airplane equipped with wheeled landing gear, a ring detachably en gaged with each wheel, each ring being provided with a peripheral channel, the base of the chan nel being open at intervals, vanes pivotally mounted on the ring, one end of each of which extends through one of the openings in the chan nel base, the terminal of each vane being en gaged with each wheel, each ring being provided larged, the air engaging face of each vane being with a peripheral channel, the base of the chan 15 longitudinally concave having its outer terminal nel being open at intervals, vanes pivotally pressed outwardly to provide a cup. mounted on the ring, one end of each of which > ADOLPH BACKSTROM.