@1,641700 centralizing s@rings 98 fix@d at oiie, end to brackets 99 on the body of the macbine and. at the other@ end to @ said baiid are pro@idbd.' 6f th n accordance )vit4 the .@ibv e pateiit stafuie , I haie he d th di @@eiii@@ 6 principle of oi)eration 61 my, invention, t@- et,r e, wth ihe @p@@ratus@. -@@hich I now con@ sider io rep@eseiit. the;best 6@abodiment theref; but I de@ire to have'it understood that 0 i(i the appai-atus sl-iowli is only illustrative and that the invention can be carried.out by other means. Also, while it is designed to use the various features aiad elements in the combiliat-on a,,nd,rolatio.n@ described, some 15 of the-e may be.altered and others omitted without:interfering with th4e more'general results outlined, :and the -invention extends stich 0 use Ra-@iiig@ hereiii @'described my invention 20 whatlelaimand,desireto,.z;ecureb Letters Patent 'IS' 1. In combination, an airclraft. having a landing gear, siaid gear liaving a plurality of i3trtit .@@imiiltaiieou@ly, aiiid mean@ s@ for ejecti:Rg @iiiiig'f@6ni'@'s4id airer@ft, s@id means @"ng members having c@ms adapted t6 I sal struts o: f engage a 6ree said struts@ out 70 6f th6 ina iiine. @ :7. @;Iii combine@tion an aircr&ft having a landing g@,ir, sdid (r6.ir having a plurality of @truts, 8aid airckafi'havin- holders, means in said, holders normaIIT engaging said stfuts, and means.operable durino, flight fgr 76 rendering @aid first iiamed meaiis ineffective so as to release said struts. S. In combiiiation an. aircraft having a landing -ear,,-a,id gear having a plurality of struts, said aircraft having holders means 80 in said holders normally engaging siiid struts nieans for rendering s6d first named m e-,ins ineffective so. as to release said struts, ati@l meaiis for eject'mg. sa,ild, str@ts fioi-n said holders after sala@ 85 9. In combination,, ai@ .,a@rbraft having a landing gear, said (rcai l@aving:a.plutality of truts connections bet*een said struts and -struts, said a i r c r a f t . h i v i h g . h o l d e r s l a t c h e g 0 , 2.5 said aircriift, and naeans for i.,eleising all n said hold6rs nornia y, enogagmg said 90 said strut.9 simultaiieoiisly to 'tpermit detach- struts aind m@ans f6r.,opora. in,& 6,11 @bf s[tid ment of said landin(r crear. latches simultaneously r@IIE4s,e s@iA @iiii6 tD tD %@ ;@ 2. In combination, an aircraft having a from sa;id h6lder. a - h landing gear,- said Lrear having a jplukality 10. In comb'matidii, an @irer ft aving a, 30 of struts,; connecti@'ns between said strut8 lainding'near, said -aear having a, plurality of 05 nd said airdraft, means for releasiiag all of struts, said:@ @irci@att ha*in a @. 9 h6ider8, lat@h64 said struts simultaneously to per@ait -deta6h- in saia holders noi-ri-ially engaki@g s6la ment of said landing gear a'nd means for gtruts iind means for operatiia@'all 6@@ s@ia eiecting said; truts from spid aire,raft. latches s imiiltaneou@13, io relea@e said 35 3. In colubination, an aircraft having asaid latc:h6s ha@ving @ams ada@ted to-''eii-gitg6' ;aid gear having iL plurality.of to said@ striits;@f 'd landing gear, E said@ struts eject rom .sai strtits, coxin6et@ions between said struts and - ...holders. said a,ir@@afi,'and. means for@ reles@sinj an o@f said@ strtits simultaneously and ej'ecting silid 40 -truts from said airemft. 4. In combination, an @ aircraft h'avin a landina gear said gear ha--vin@ a r ,,fi ty Of sti-@ts, connections betwee@ said strtits and sa,-d aircraft, means for releasing all of 45- said struts simultaneously to permit detachment of said landingear, said means comprisin(r latches engaging @,;;aid strut@, and i-noans-lor operating said la,telies simultane,- ouslv to'ineffecti@e positions. " ,O@ 5. In combidation; an aircraft ha 'n a vl 1,,,iiding g'ear, said gear having a plurnfity Qf striits, coniiections between said struts'ands-,i,id aircraft, means for releasing all of said .@truts simtiltane6usly and ejecting said struts r):) f @oni said ,tircrafti said liieans compris:ing Ititelies engaging --aid st@uts, and means for OI)erttiiig said latelies simultaneously to ineffective, positions, said I.at-ches having cains ,idapted to enlyage said struts when said ti( latches are nio-@@d to ineffective positions to forc@ said strtits out of,said ma6hine, 6. In conibination, an aircraft having a landing gear, said Lreai ha-@ink'@ plurality of struts connection@ -between said struts and said aircraft, means for releasinly all of said ii. in combinationi an aire@alt h6v!@g a landing geir, said kear having a.pluritlit y 0 f :@@truts, connecfioii 'b6t-@veensaid struts and 104 'Said airciaft@ riieans:for rel@asiiig all of said . st@uts . silmultaneo@a , sly to pormii,deta@hmefit of said landin@,,. gea@, said means compri.slng.,. 'latches engaging said struts, and means for operating said lat6hes imultaneously to. in'110 effective positions,,.said Ittst nain6d @means, 6omprisiiig a. plurality of links connected to said latches, an operating handle, and gearing between said links and handle. 12. In combiiiation, an @ircraft having'a.116 landing gear, said D'ear having a plur@lif@ of struts, connecti6iis betwe6n sdid struts and said aircraft, means for releasing all 6f said struts simultane6tisly to petmit detachment of said.landiag gear, said means colrh@ris,ing 120 latches engaging said struts, iiaeans for r ating said fiit6hes simtiltaneouslv to ine Ctive positions, a plurality, of links connect6d to said latches, iin op '@tirig shift conneeier tions between said link &Dd shaft whereby 125 rotation of said sliaft operates said.lin'ks to effective and ineffective positions an oper-, ating handle., and gearing between said handl aind said sh e aft. 13. In combination with an aircraft having 130

1,641,700 a propeller sliaft, a pi-opeller mounted tliereon, means for enablir@g said aircraft to land upon water including a detacliable landing gear, and i-ricaiis for stopping the propeller in substantially borizontal position, a brakeband substaiitially surrounding said shoft and normally spaced therefrom, and means for clainping said band around said shaft to hold said propeller. in substantially horizontal position. 10 In testimony whereof I have affixed my signature. LAWRENCE B. SPERRY.

v 7 Patented Sept. 6, 1927. 11641 00 UNITED STATES PATENT OFFICE, LAWRENCE B. SPERRY, OF FAP.XINGDALE, NEW YORX; THE BANX OF AlYr CA, OP 24EW YORK, N. Y., AND WINURED ALLEN SPERRY, OF HEMPSTEAD, NEW YQM EXECUTORS OF SAIED LAWREXCE E. SRERRY, DECRASED, ASSIGNORS TO WIN37RED ALLEN SPERRY. AIRCRA:FT. Application Illed October 21,1922. Serivil No.. 595,920. A further oblect is the provision'of land-. 55 ing skids which take the place of 'the deta6hed l@tnding O'ear. These skids carry the madhine easily -over rough ground and are to be preferri@d in many i-nstances to the whe els of ihe ustial'landing gear fo-t the so piirp ose of Ilighting upon solid, and especiall y roukh, groiind. A further object in einploying@skids'is to pre v@nt the machine from capsizi-ng or turning over on its nose when landing on land, 05 as it is possible to place the sl@ids so far ahe, ,id of the center of gravity that nosing ove r in bad places will be impossible whe reas with wheels, it is not possible to put them more than 15 deotees ahead of the 70 cent er of gravity, and get good results with the m. A ftirther object is th6 provision of nieans releasing mechanism still f@rther ,Ia,@ e silient, shock-absorbing mounting, for the latidino,, skids. Other objects and advantages will inpart be obvio-Lis and in part be specifically pointed oiit in the specification. In the accompanyingr drawings, Fig. I is a side elevatioia of an aeroplane so embodying one form of my invention. Fig. 2 is @ front elevailon t-hereof with the propellerremoved. Fig. 3 is an enlarged detail view of the landi-ng gear releasing means and the op- 85 eratin(y mechanism therefor. Fi L@4 is another view of the la . ndiiag gear 9. body of water is greatly facilitated. Here- @ A further object is the provision of a reThis inVenti6n relates to aircra#, and has foi, its I-)rincipal object the provision of a beavier-tban-,,iir flying machine of maxili'llim eticiency in 01( !ht, or in rising from or aliahting iipo@ land or water. Fiirtber, the inve-ntion has for. its object the I)i@oN,ision'of ,in aircraft having a detachable la-nding gear whereby an aviator m@y rid Iiis ni.,Lchine of said gear after rising in -10 the air. The advanta(yes of such constriietion are many. In the first plade, it obviously reduces@ the weight of the machine by ninety or one h-Li-ndred pounds -,ind will thus enable 'an aviator to increase the speed of 15 his machine ten miles an hour or more. Secondly, the air resistance of t-he machine is lesgened by the removal of pi @Ojecting ports. Thirclly landiiig 6f the macliine upon a 3 r) foil I-)reventing too rapid falling of the, det,tched Ja.nding gear. Th's means may, ta'ke the foi,iii of a parachute normally in,closed position and carried by said aircraft, but wliieh is adapt@d to be detached from the 4ti airer,,ift and rendered effective by the fallincr of the la-nd'ng gear. ision of haea A ftirtlier object is the prov ns such as a float, oldapted to support the l@ndinc, (year upon the water ani prevetit sink45 in'- Fhereot. 9 go tofote, t-he landi.ni gear has proven a sev,ere hindrance to the landi-ng of the machine upon w,,iter, the landing gear tondink to cap size the machine iipon striking water. And finallv, it may be desiritble to land on a 25 more convenient mechanism than wheels, SU(,,h e. g.i as skids, - ivhfch a're effective - for travelino'oi7er @ough Lrround. It is a ftirtber obj@@t of this inventi6n to provide a (let,,tcliabl@ landing g@ar, as afore'd, and iiie,,ins controlled by the aviator whereby the gear may be rapialy and easily rele,,ised fr -Om its attachment to the mitchine withotit possibility of jammil@g. aircrai't, it may be the case that the body c@@-' thq m,,ichine is so low that. the, propeller, Ul)(,n I-,inding, n-i,,iy -trike tlxe ground in ro5(i t,,iting. It is a. fu.tt@er object of this.- invention, therefore, to provide 'means. foil stopping tbe'pro@ellef- in siibstantittlly horizor@tal posi'tion and for -maintaining it in ,-@aid position. g d Fig. 5 is a section taken on the 5__i of Fig. 7 and showing the skid and ffid-'90, supporting means. Fig. 6 is an enlarged front elevation of the airplane @howing the skids. Pio,. 7 is a vertical section ta-ken on the line i@@7 of Fig. 5. 95 Fig. 8 is a view'showing the landing gear at tne begiiining of its downward flig4t, after having b6en detached'from the itir-' plitne. by a parachute. Fig. 10 is a- view showing the detached Itnding gear with a buoyant @meinber attached'thereto for supporting it in the water. Fig. 11 is'a front'elevation of the air- 105 craft floating upon a body of water the propeller bk'@ing held in subrtantiauy zontal positioil Wlieii the landing.gear is removed from an.' Fig. 9 shows th@ landing gear supported. 100

1,641;700.,, 'Fig. 12 is a side el,evatiori bf -a brake ne shaft 83,: 6xte erable for holding th OP t nds through the mae@ p.@@i).@llei sliaft In chine 6 t' 6the3@ side thereof where the f ixed position. locking - Mbohinigiii is di@pli,@,ted so that' aR Fig. 13 is a fr t el On e-vation of ',the, brake@ of 'th6 lo@i@hei the present case) on b 5shown in Fig. 12. dth side @f ihe @idehine are orp Fig. 14 is a verti cal@ se6tion. through the neou8lY. cylinder,s of an airplane engine, show g@ le @ve i4eans for sto Ping th6 eiigin6 s6 that 'tnhe lin propeller shatt driven thereby occupies @ a the 10 predetermined position. ate Referring to the drawing to rid the machine of its landing gear after r th6 former has left the ground. @ @r, o tl-i' is pur the.,gear is detachably connected 25 to t, re machine, so that it may be disconnected at the 'will of the -operator. One suitable form of cort@ectio.n,is:illustrated in Figs. 1-4 and c@ompris6s A latch 20 slidable iA holder 01 - in' the form of a track or 30 guidewag,,, fted@ to,the ftsel'age of the machino. aid latdh.h@s a sict 24,cti ,t@therein and e xten4iiiig,@,tr6i@ ih6 boitom ed@te therpof obliquely u@i@ird then siibstantially. horizontilly fo f orm, a ..pron@ g or fiiiker 22'. p w landing gear comprising a pair of WI eels. 15 mounted upon an axle 16 supported upon the machine b s@ struts or hangers 17. A p@tir of struts is s own, in the present case, at -00 each side of th6 machine. e a t e d s i m u l t a - i l i w i l l b e a i v p a r e n t t h a t w h e j a t l i - e a l i g r i m e n . t w i t h t h e w i l l p r o j e c t t h r o u g h e h a l i d l e . 3 7 i s o p er-. o f a l i g n m e n t ' w i t h T 5 rong 22 leaves the ap@rt re in the upper 80 1 7 , t h e c a m s u r f a c e 3 6 crid 6f hanger comes in ibontact with the u p p e r e d g d I o f ' - s a i d h a n g e r v i n d c a i h @ t h @ l a t t e r , d 6 W n w a r d l y o u t o f f h - e . s l o t @ @ 3 6 . . - T o p ' r e v e n t ' t h @ . h a @ ' f r o g e r @ m boiiak jammed betwe6n the pron g 2 2 @ ( f 6 r e , , 8 5 l e f t , t h 6 . a p @ e t t u t e i n t h 8, thete is illus- @lin 30, the pron trated in Fig. 9 e vvithdralwn. I an aircral't 10 of ordi@ary Ag h(3reinbefoie st te the sl6t: 2 coiastruction liavilig the usual rtidders @ll, warclly from the prong 22, 9 opeller 12 4doowunl-- pi. wiiigs 13 and operator's eliclowardlv so as'to-form a am inci"e 36. As surface IB sure 14. The machine is rovided ith a -the p u Ashereilabeforestated,itrhaybede@irable@@the latier hd e henket) An(I the@cgi@@@i th6 outward- ip 0 thi3 piojig @ia@ be cui ok to form @ cam 37 @ub@tintia@ll@ parallel to 6@iii 36. @it Will th thus be@, appare;it.. thkt ii6t only are @;@ll, 90 hani.6r@ i6leased @li@i@itan oousl.y but a positiv6 forc'e is introdu@@ d-'f6i eiedtiho, - thein from, the holders All possibility o sticking or jairlihiiig Of or more of the st'ruts or hangers in the h Ider's,'due to some@@ force 95 iiid is thl, such as wi avoid@d. To @ preveiai dama@@ io the landing gear 'which' - i@ould ordinarily result from drop@iiig th6re6f, there mA y be provided a small adapted to en @g6,iii'e@6'(not @liov@n) n@ar @@pira6hiite .40 normally@ held, in folded posi- loo the u c ,p er @enT' if. i haia(rer o@ stiut l@. - A@ @ tibii@ @in @a st@eam-Ene@@case 41 iii the bottom verticaf-g@ide-slot 25 is f6ormed ih th'e track surface of the fuselage. The p;arachute is 21 t@6,p',,erinit the str.iat to be rais6d abov,e connected to the I foiir struts by cords 42 the 22 sci- that the lattei m@Ly pass, whi I h p@on c are in turn connected by@ a cord 43 to 40 thrg)ugh bi6 6ye !Ti @aid. strut. the' cords 44, of the. paracbute. When the 103 Sind6 t-i@o si ded at 6i@h Iiiidiiig gea rts to d ruts 17 at@ prbvi r sta rop, it, pulls upon t 1, side of ih@ ' r@a@hine, wci ati@he 20 of 'thie cbrd 43 %nd breaks a cord 39 tying to-ether same con@tr I action b@t oppositely dispbsod 'ihe ends 45 of a bag enclo@ing the parwchute are e ,provided. - 'to operate th latch6s',to,ef-' in case 41 perrditting the parach' ute to 'drop. 45 fect;ive --!(.16CIiing) @nd i@effect,ive' T@he ends of' the Iatter are tied together by !ICin the lat6he@ 20 m4y be prb- -a light cord. 46 having one end hx'ed to the d inwaidly dispo The cord 46 is broken b@ th6' p Ville sed end@ with case at:47. be pivot6d @ at, 6ne end fall.of the landing gear and - parachiite per links 3 upola ears.@ll on said@ latcheg hiid,-at their mitting the latter to open. Thereafter t.Itie other e4d 'upo Oposit6 6@ds of @'a balanced landing gear drops slowly. lever 32 @fix@d upo:)n q shaft 33 journaled in. A cross-bar 49 is interpo,@ed betwc,-,n struts d s t o r t i o n t b e i - c , o f ( I i i r i n t h e the machine. Said shaft carries -also,, a .'@17 to prevent i sprocket wheel 34 oveir @ which operates ''aii endless chain 35. The other eiia of:@@id chain operates over a si 'Milar sprocket Wheel 36 mounted -upon the side 'of the ihichine, and a handle 37 is provided to I mov6 integrary with said N@ifeel 36. The handlo, 37 is@ pbsition6d adja6ent th@ . a I viat6r's seat Go so that he may readily swing,haindle@ 37@for*ardly or rearwa@rdly to op@erate l@ver 32 through the chain and @rocket connection, and h6nee operate th6 latches into or out of The cords 4@ aile :fall, of the landihg geai . '6 ted to a li-ea.vy striin durina the fall subi c ndin@ oes-bar 49 120 of the la gear, and if the ei-' were not pi-ovided to ho'ld the striiis ri!,),id@y in posiiioii, tlier6 is possibility that the striit's ori o@posit@ sid f es o th@@ landing gear ivotild be bent togetlier ancl rencl@--red u'seless for cooperntion with tliu- latches. 125 Wherb,tlie lan(lin g r 's, to be clrol)pek-I g ea i ovei- wate-@, there may be siibsti-tuted foi, the para'chiite-@ I)uoy 50 attaclied to the,, landin(, the -apertures in thip up er ends of the hang,;,ei ' , cabl@ 51 -wotiiicl iipoii a reel 5@ @p r by a 2 era -v@hich way be mounted upon cross-bar 49. 1-

1,641,700 The reel may be spring-pressed so as no,rmally to wind up the cable. When the buoy 50 strikes the water, the -cable will b-, tinwound to the extent wbere the spring neutralizes 6 th2 wei(yht of the @ubmer-ed landin,,Lr gear. 'ne @sual rubber tire,@'of -%vheels' 15 iniv serve to float tlie landin(, (year upo-,i tli water iihile tlle parpcliiite attaclied tliei,clto Eerves to indicate the 'position 6f s-,iid gear. 10 -In the case %vbere a, buoy is used, it ma.v be painted wliite for the sam@, piirpgs?. It is apparent that botli a paracliute and a buoy may be employed iii -.ome cafes. The purpose of dropping t-lie landiiil, 9,,eat15 may be, as liei-einbefor-2 @cxpl!tined, to'flcilitate alightin- of the machipe iipoii watei,. In this case the bodv of tbc- maebine i@; coiistruct.ed@ as a wat-p@-tiglit iinit cipable of floatin(r. The'iisual lower wing nay also 20 be dispensed witli iri this case. Ailother purp@se of droppit!g tlir@ lindin..-., gear is to permit the iist, of inoi.-c eflicip-,it ver landing g,2ar upon y roti(rb gro ' iijid. Tn the prefent case skids .5.5 are eiiiplo.ve(l, s;ncf,, 25 the latter travel easilv OVE'll very roiiqli grounid and permit the inaebine t(i, t)t, brouo,ht to rest in a quartei, of the digt,(tyic@, usually required wben ivheels ai-e oniplove(l. The skids are sboivn as operating in eban30 DCIS. SlotS or Luidew-,ivs 54 in the 'iisela(-Yi@ extending from the fr;nt end almo,,t to the rear tbereof. The slcids may 1)(, Flial)c,(l somewhat like th(,, riiiners of slei@liq. and each may compri-,e an i,,-pper nieml)fr 5'i -i 35 lower meniber r)8 forin-.d prefeiral)li? int(,(),ra-I connecting said m.?nibei-s to fori-n a stiirdv frame -%vl@ich is the pi-eforred coi--lstruction (I skid. The skids ar.@, fruided to move sub40 stantially parallel to t@e walls of the ne-1, 54 6y means of a plurality of I;nlcs 60 pivoted at one t-.nd at,61 on a wall of. the channel and -.it the otlier end on an -,idja,-ent side of the skidframe. The r(,I-itivelv long 45 ledgth of links 60 and the -,m,,tll ,ingtil4r distances tbroii(yh wbich thev i-nove insiire movement of the skids practically parallel to the walls of the skids. Said movemei-t is rcsisted I-)y liea-@v,resilient members or rin-s 50 64 adapted to enga(re over irms 6' ) on the skid-fra-me and crofs-bars 66 on the'fti-,?Ia-e. The arms 66 are positioned back of each wall of the cl-iannel 54, and arms 65 extend through slots 67 cut in th,:, ebannel walls 55 so that said arms 6,@) overlio the respectiv@2 ai-ms 66, an@d the resilient bands 64 mav engage the respective bands at substantially right anoles. A plu@'ality of s.ucb sets of arms 65, 66 and bo rings 64 are provided throughout th6 lengtli of the, skids and the @hannel. It will be, apparent that upon landing on any poi-tion of the skids, that portion will be pressed upwardly in the chaiinel, tbus stretcliirg the relanding fully absorbed, but tlie, movement of the skids relative to the macliine is resisted to damp the movem6nt and -Uard the fuselag @ from injury whiell might be calised by coming in contact witli the groun(l. TO When the macliine witli tlie, landing gear detaclie d aliglits upon the ii,atei,, the -VN-atei,- tiglit body acts as a floating iinit, and wben the machine lands upon the skids, tlle body of tlio, machine i-, so low with resp-ect to 75 the stirface -of the water and tlie. (rroiiiid, i.-cspee,tiv ely, tli,,it it may be necessai-Y to .9top the. propeller in lioi,izontal position before tiliglitin(, . For this I)urpose there may be pr6lvide @ the devi(-e wliieh is niore fiilly de- 80 sci-ibed -in my co-pen(-Iing ipplication Serial No.,581.2@7. filed Aiig-tigt 11. 1922. This device comprises a levei- 70 connected to eacli exliatist vllve 71. of tlie., cylindei@s 7@ of an interiiil combt:istioil enoi@e einplov,-d for 85 di-iving the mqclline. C linkage 7.3 is conne@!ted to all tbe valve ,,tems in sueb mtinner tli,,it ii,heii operated by the aviator, cert-ain of Ftid valies are ol)en.@d aiid cei,taiii valves aj,e closed.. the f iipl siipl-)Iv to.the engine liavino, 1)0 previou sly beeii ciit @fF. This wotild tenr to bold the pislons 74 in the same rel-,itive pov.itiod s witliin the cylinder everv timo the linka,(Y e was' operated, and. the p@opeller is fi-.K@,d t(@ its sliaft to ocetipy t,lie liorizontal po- 9b giii6n whenever the pistons oecupy said relItiv(l positions. 1.@ To bold the- pi.-opeller flrmly in horizontal pogition there may be provided a brake compi-ising a band 86 encircling the hiib 79 of 100 with the upper member, and brace rods @io -" the pi,opeller shaft and split at one poi.nt in its periphery, the portions of the band adlacent the split being bent off to form flanges 81. A shaft 85 extends through said flanges, said shaft being screw-threaded on I 0-i i@ts lower end and clamped in positiort against ]6wei- flainge 81 by a'loclk-nut 86. @k ratchet-member 87 is fixed upon thel@IPper flange 81 and has teeth 88 meshing witli teeth 90 of a ratchet-member 91 journaled 110 on the upper end of shaft 85. Said ratchetmember 91 bas an. arm 92 flxed thereto to the end of which is pivoted one end of a link 93 having its other eiid pivotally c-onnected to one end of an operating 16ver 94 115 pivoted upon the machine adjacent the aviator.7 s seat. By operating lever or handle 941 the, aviator rotates ratchet 91 to cause the teeth 90 tliereof to cam downwardly the teeth of ratch6t 87 and henco also move. 120 @the upper flange 8i toward the lower flange 81 (- vvhich is fixed relati'e to rat , chot 91) and cause the band to tigliten aboiit the liub 79 of the propeller shaft. Movemeiit of the flan is a,gainst 125 the d beiween and arate sa;-d flaii cent ralized 'so that all parts ereo are olit of contact 65 silient members 64. Not only is the @hock of with the hub 79 when the brake is released, 130