History of aicraft piston engines

L manly o t o r u nfortunately t c annot refer to j he

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Unformatted text preview: :I had f orgotten that T had n ot i ncluded i n t he I&inolr t he more d e t a i l e d i nformation c oncern" n r t he s i z e , weight and speed of the sma?.l Manly " o t o r , U nfortunately, T c annot refer to J he o r i g i n a l r ecords which w ere r eturned f or s afe k eeping t o t he a rchives of t he S mithsonian. However, my r e c o l l e c t i o n of t he m atter, I t h i n k , i s q uite accurate and i s a s foil 'T,7s: The bore was 2 -1/16" d iameter; t h e s troke 2 -3/4 n ; t he power developed was 3 H .P, a t 1300 R.P.M. a>d t he w eight was j u s t t e n ( 10) l b s . , i n* e luding c arbureter, ignition c o i l aad t he s mall s torage b a t t e r y that had a l i f e of a bout five ( 5) m inutes service i n f i r i n g t he engin< * I do n ot r e c a l l that any p hotographs -/ere made of t h i s engine except w hile i t was a ssembled i n t he frame of the q u a r t e r - s i z e model aad b elieve t h a t t he o ictures shown in t he Memoir a re a s good os arty t hat T had of i t . The cylinders of t h i s e ngine were irv.de of heavy s t e e l tubing turned down to form thin i n t e g r a l r a d i a t i n g fins.with t he c ylinder b a r r e l ? nly l /o2" t h i c i a t t he bottom of t he f i n s . Castiron l i n e r s .vere shrunk into these cylinders and were bored o ut to l e-^e them 1 /32" t h i c k . The c ylinder heads were made from solid h ind forglngsfmachined o ut)v;hich w ere screw threaded and b razed t o t h e s t e e l cylinder b a r r e l s before t he T atter w ere finish machined. T e g eneral olan of construction of i t was s imilar t o t hat of t ho l arge e ngine e xcept t hat Lt was a ir-cooled instead o f w ater-cooled. I w ill t r y to l ook up some personal memoranda that T have and s ee i f I can g ive you more d e f i n i t e detailed data regarding the w eight of t he'engine and i t s a ccessor!eSj b u t , I t hink t he a bove information i s f a i r l y accurate a s t o g eneral f eatures* Yours very t r u l y , CI104CB <3S*.>fyv->^^U- Figure 9.—Letter from Charles M. Manly describing t he small gasoline engine of f igure 8. (Photo A-51010) 10 \ AIRSHIP AFTER BUYER. / I nventor* of North Carolina Box K i t e M achine W a n t Government to P urchase It. F igure 1 0.—Account of Wright brothers' first airplane in The New York Times, D ecember 25, 1903. Special io 7 hr New York T>mn. W A S H I N G T O N , Dec 2 3—The I n v e n t o r s of the a i r s h i p which Is s aid t o h a v e m a d e s everal ul flights In N o r t h C a r o lina, n ear Kitty H a w k , a r e a n x i o u s to v l l t he use of their device to the G o v e r n m e n t . l alm t h a i t hey h a \ e s olved the p r o b lem of aerial n a v i g a t i o n , n nd h ave never m a d e a f ailure of a n y a t t e m p t to fly T h e i r m a c h i n e In an a d a p t a t i o n of t h s box k ite I dea with a p ropeller w o r k i n g on a p e r p e n d i c u l a r s haft to raise or lower the c raft, and a n o t h e r working on a h o r l s o n t a l s haft to send It...
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