FLYING-MACHIXE 



; MEMORANDA. 





By Lawhkxck 



Hargrave. 





[With Eight : 



Diagrams.] 





\_Read before the Royal SoeieU, 



'^^.s.w., August 7, m 



?9.] 



SiNCK December 1887, .severul de 



selopjnents have taken place in 



the evolution of tivin-'-mac-hiTies v 



-Inch it is proposed 





more or h3ss lucidly iuthispapcM- 



; perhaps the writer over-esti- 



mate., their value, but it is hoped 



that such as they a 



re they wU 



shew some of our uieinbei-b that in 



effect the drud-ery 



is done and 



competition aalone is %v anted to 



bring the matter to 



a pi-actical 



issue. Great efforts have been i 



nadetoo-etareliai; 



le motor ; a 



single cylinder vertical engine absorb(^d mucii time 



and labour, 



but want of skill in construction i 



nvolved such an an 



lount of un- 



necessary weight that if it is ever 



completed it will nei 



irlyall have 



to bo re-mad(^ 







Thecenteriutrditlicultv-avelun 



til to several curious 



mechanisms 



for puUin- the 'crank otf'ti.e cent. 



e, the best of them 



is sliewn in 



Fi-. 1, as it mav be useful to en* 



;in<.«>rs where a fiyxs 



-heelortvNO 



cylinders are inach,.i..ib!o. In tl 



w position shewn b 



oth parts of 



the india-rubber spring ;nv .l,u-k, 



u lu-n the ball-crank 



pin K gets 



between D and Kpulhn 



- th.- main nank-pin L over the top centre. 



When the main cranl 



.-pin L gets to F it begins to .tore power 



through the cord B, an 



(1 continues to store it until L arrives at G, 



this power is given ou 



t between G and H, and pulls L over the 



bottom centre An aii 



• compressor, reducing valve, and Richard's 



indicator were also ma( 



le, but need no special descrii)tion here. 



The next engine con 



structed had a variety of tackle for using 



petroleum ■^pult \aT)oui 



as a niotue power, the only result a^ >et 



being that manual skill 



m bihe. soldering and li-ht engine woik 



wasacquned At this 



time what m.iy be called a most valuable 



invention vvas made, n 



amely the me. li'mnal movement by which 



the wing can be m ul, t 



nd.sM.l.. n4i<lK tlu'luu.eotemhtobserv- 





H ui ,,' ntlnn^^n.^Mni^m-, ape.spectne 



view of the' moll'.'lV .', 



..n.nl;,, 2 , h. n... urn nt is applied to 



the three cyhiKh , m^m 





worth by the m.ku so 



rt.o^o^hd'pUnl'luuigmuttr''''"' 



As there seemed to 1 



)e consider abU' dithculty in making mtelh 



