Патент USA US2403754код для вставки
' July- 9, 1946- J. D. PliERsOiN - 2,49754~ SEAPLANE SPONSON > _7 ‘ ":3 _ 4 _ ‘Filed Feb. '9, '1944 , 2' Z-Sheets-Sheeti . 5 ‘ ' INVENTOR. ‘ ' gov-1N, D. PIERSON ATTORN July 9, 1945' J. D. PIE'RSON - SEAPLANE SPONSON _ I ' 4 . ' _- 2,403,754 - Filed Feb. 9, 1944 FIGURE \ - ‘ 2 Sheets-Sheet 2 ' ' I 6 Illllllllf i. _ INVENTOR. JOHN D. ATT PIERSON R' Ev Patented July 9, 1946 2,403,754 UNITED STATES * PATENT l OFFICE I John’D. Pierson, Ov'erlea, Md., assignor to The ' Glenn -L. Martin Company, Middle River, Md, a corporation of Maryland Application February 9, 1944. Serial No. 521,608, 7 5 Claims. 1. (Cl. 244v—135~) This invention relates to a method and means for increasing the range of a seaplane and assist ' The seaplane illustrated in Figures 1, 2 and 3 is shown having a hull generally indicated as "l ing the take-off under heavy loads by means of to which the subject sponsons 2 are-attached. It will be noted that in this application of the in vention, the sponsons are so formed that they extend forward and aft of the wing and, in the droppable sponsons mounted exteriorly ' of the hull, along the chine that increase the fuelstorage capacity and afford greater planing area. ' N Y" "The inherent structure and design of any air particular application, form substantially acon tinuation of the bottomsurface ofthe hull for . craft necessarily determines take-off characterise tics, and the fuel carrying capacity designed for ward and aft of the ?rst step. the craft, determines maximum range. Aircraft “10 , designers are continually on the lookout forjany device or expedients which may be employed in connection with a ?nished design, to improve complete sponson by having their ends contiguous. ,'I‘hese"sections are separately attached and de tachable from the hull along the chine and the bottoms of these sections form a smooth con either performance, take-off or range that do not amount to a major change in'str'ucture or which do not inhibit existing desirable performance characteristics of the airplane. V ‘ ‘w tinuation of the hull bottom, thereby increasing the planing area of the. hull adjacent ‘the step. , -The take-off characteristics of seaplanes, are usually quite critical and overloading the plane, Figures 4 and 5 showenlarged views of the spon Vsons. Each section of the sponson is secured to 20 the hull by a ?tting 6 which has a pin '1. retract ~ able into a‘cylinder 8, by means of ?uid pressure. This] pin extends. through eyelets 9 in bracket 6 which is attached to the hull, and an eyelet in member ID, attached to the tank. a The fluid cyl 26 inders are all connected together by line ll, com such as increased fuel loads, to extend the range of the craft would bring about undesirable ‘ changes in the hydrodynamic characteristics of the craft at take-o?". _ _ By this invention a means is providedwhereby the range of a seaplane can be extended without sacri?ce of any of the desirable performance characteristics. Figures 3, 4 and 5 show the droppable sponsons in sections. Sections 3', ,4 and 5 go to make up a municating with a source of ?uid pressure, which maybe either a part of the hydraulic system of the craft, or in the preferred form, an air bottle I A [further object of the invention‘is‘the pro vision of structure to increase the range which I may be employed to quickly and simultaneously also improves the take-off characteristics of the 30 withdraw the pins 'so the'sponson. sections may aircraft. ' n ‘ _ ‘ be .droppedwall together. ' ' . . ' - Another object of the/inventionjs the" provision Figures ‘7. and 8 show enlarged vviews of the of means for storing additional fuel exteriorly details of the bracket and pin forattachingand of the aircraft which does not interfere with'pere , detaching, the sponson from the hull desired formance characteristics and further ,may be 35 above_., A pad l2 is provided between the sponsons jettisoned to increase the range of the craft when i and thehull to prevent abrasive action between no longer needed. > I I w. n , the sponson and the hull. } Further and other objects will become ‘apparent from the description of the accompanying draw ings which form a part of this disclosure and in which like numerals refer .to like parts. Inthe drawings: _ ' n r 7 ’ Figures 9 and 10 are enlarged views showing the attaching. bracket for. supporting the bottom of the sponson on the bottom of the hull, at the chine strip I 3. Abracket I4 is riveted on the chine having a tapered projection l 5. To a spon son'3. aplate-IG is riveted having a hole I‘! K Figure 1 shows a plan view .ofjthe invention adapted'to extend and fit over projections l5. Figure 2 isla front viewlof thei'seaplane'incor 45 A pad 18‘ is placed betweenthe sponson and the porating the ‘invention. ‘ chine strip toprotect each from abrasion by the applied to a seaplane, , 1 , , _ ' , ~ Figure 3 is a side'iview'of the seaplane?showing ', the location‘ of the invention.’ ' v v, . ., 7 [Figure 4157a.‘ fragmentary view of the sidecrofl a seaplane hull showing the droppable sponson. Figure 5 is a fragmentary [view in principle of the- structure shown in Figure 4. ;.. -_ . . Figure dis a fragmentary section through’ the hull and sponson. ' , ‘ Figures 7 and 8show the attachment of the top of the sponson to the hull. \ -. Figures 9 and 10 ShOW the attachment or the bottom of the vsponson to the hull. Figure 1.1 is a fragmentary view in section showing the detachable fuel line. . other. @ Thegasoline line 20 to withdraw gasoline from I . 50 the sponsons, isshown in Figures 6 and 11.. The latter ?gureshows an enlarged detail of the gaso line line ‘and ?tting connection between the spon son and the hull, with provision for a quick detachment of the line, when the sponson falls away from the side ‘of. the ship upon the with drawal of the pins. 'A bracket l9 . shown secured to the hull. Pipe 20 is connected to this bracket and to the fuel pumps; Pipe 2i extends through the wall 22 of the sponson and is secured , theretoby a weld or other means as indicated'at ' 60 23. This pipe extends through a hole in the 2,408,754 3 wall of the hull and into bracket IS. A sealing means is provided in the form of O-ring 24, of elastic resilient‘ material, placed in a groove. 25 to effect a ?uidtights'eal. It can readily'be seen from an inspection of Figures 6 and 11, that when pins 1 are withdrawn from eyelets 9 and lo the; aerodynamic forces and the force of gravity will urge the tanks outwardly, withdrawing‘ the'pipe 2| from bracket l9 and downwardly to'diseng-age plate l6 from projection l5, thus freeing‘, the sponson from the attachment to the hull. 4 by a substantially unitary spcnson is formed, said sections being separately removable for serv iceYi-and“ repair; meanstoidetachably secure said sponsons to said hull, whereby said sponsons may be dropped after performing their dual function ' of increasing the planing area and affording stor age space for auxiliary fuel. 2. In combination with a stepped seaplane hull, sponsons, adaptedgto carry auxiliary fuel com prising tanks extending along the chine on each side of’ thehull forward and aft of the step, the bottom of the sponsons forming substantially a It has been found that ona- ?ying, boat, similar continuation of the bottom of the hull, said spon to that illustrated, the addition of such sponsons sonst comprising a plurality of separate tanks increases the range about 60% by providing ad ditional fuel storage space. The increased plan 15 placed with their ends contiguous along the chine whereby a- substantially unitary sponson- is ing area adjacent the'stepcompensatesfor'the formed, a detachable: telescopic, sealed ?tting additional‘ load of. gasoline» on take-off so that connecting the gasoline line with theinterior of the take-off characteristics are-about. the same as each of said tanks, said sections being separately without the sponsons and additional. load. In other words, at take-off the sponsons carrying 20 removable for service and repair, means for de tachably securing. said sponsons to said hull, the gasoline by their form, compensate for the whereby said sponsons may- be dropped after per additional load causedv by the gasoline. The fuel forming their dual, function of increasing the will be ?rst drawn from the auxiliary tanks inthe planing area andtaffording storage space for aux sponsons and during ?ight. The-sponsons affect iliary fuel. the aerodynamic characteristics of the airplane 25 3. In combination with a stepped seaplane hull, so that about 2% reduction in top speed results. sponsons adapted to carry auxiliary fuel com Theeffect. onv cruising speed is less so that it is prising tanks extending along. the chine on each practically inconsiderable. When the gasoline side, of the hullforward and aft. of the step, the has been. used from all the sponson. tanks, by means» of ?uid pressure connected to lines H, all 30 bottomv of the. sponsons forming substantially a continuation of the hull, means to detachably the sponson tanks may be dropped simultaneously andth'e plane continue onits trip. with topper formance having. the advantage of normal take‘ secure said sponsons on. said hull, whereby- said off and a 60% increase in-its range. Itv should be, noted, that the sponsons may be sponsonsrmay be dropped after performing their dual function of increasing theplaningarea and affording. storage space for auxiliary fuel, a readi made relatively inexpensively compared withthe very desirable result obtained and the adaptation of the ship for the connection of droppable tanks line line with the delivery line from said tanks, and means to simultaneously detach alL tanks ly_ detachable sealing means connecting a gaso from said hull. ' of the. character described does, not affect the 4. In combination. with asteppedseaplane hull, landing. and take-01f of the ship’in normalopera 40. ' sponsons adapted to carry auxiliarygfuel. com tions without such tanks. prising tanks extending along the chine on each The number. of tanks is, of course, optional. side of, the- hull.‘ forward and aft of. the step, the In- the, preferred embodiment herein, described, bottomof the sponsons forming. substantially a the sponsons are shown- in three sections forfcon venience' of handling and attachment. Since. all, 45 continuation of the bottom of the hull, saidspon sons comprising a plurality of sponsors tanks seaplanes must have beaching gears, of. some sort, placed along the chine with their ends contiguous in the preferred form of the invention, a forward whereby a unitary sponson is formed, readily de section of the sponson is shown of a longitudinal tach'able means securing. the bottom edge'of the extent. sumcient to span the area on the hull where the beaching gear would. normally be at 50 tank to said chine, means. to detachably secure tached. The beachi'ng, gear location. is shown in dotted lines in Figure 3'. The portions of the sponson, except for this section, can be installed while the seaplane is on shoreon the beaching the top of,‘ said sponson tanksto said hull, said be, attached after the beaching gear. has been re. moved when the seaplane is a?oat. Due to the storage space for auxiliary fuel. last mentioned means being interconnected for simultaneous operation whereby said sponsons may be dropped after performing their, dual func gear, and theforwardportion of the sponson can 55 tion of increasing the planing area andaffording difficulty of handling seaplanes in‘ rough water, the advantages‘ of attaching the major portions , 5. In combination with a seaplane hull, spon sons adapted to carry auxiliary fuel comprising tanks extending along the chine oneach side of of such sponsons on shore and ?lling them with 60 the hull, the bottom of the sponsons formingsub stantially a continuation of‘ the bottom of the gasoline on shore, should be obvious. hull, said sponsonsw comprising. a plurality of It is to be understood that certain changes, sponson‘ tanks placed along“ the chine with their alterations, modi?cations and substitutions can ends contiguous whereby a unitary sponson is be' made without departing from the spirit and scope of the appended claims. 65 formed, readily detachable means securing the bottom edge of the tank to said} chine, means to I claim as my invention: detachably secure the top of‘ said sponson tanks 1. In combination with a stepped seaplane hull, to said hull, said last mentioned means‘ being sponsons adapted to carry auxiliary fuel compris interconnected for simultaneous operation where ing' tanks extending‘ along the chine on each side of the hull forward and aft of the step, the bot 70 by said sponsons may be dropped after perform ing' theirv dual function or increasing the planing tom‘ of the sponsons forming substantially a con tinuation of theb'ottom of the hull, said sponsons area and affording storage space for auxiliary comprising’ a plurality of separate tanks placed fuel. along the chine with their ends contiguous, where ' JOHN D. PIERSON.