FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1913
1913 - 1207.PDF
NOVEMBER 8, 1913, mately that of a certai.i bird's wing, and the bird allowed to fly between the two smoked sheets. These experiments most conclusively showing that a flapping bird's wing is flexed during the up stroke, as there was scarcely any sign of a scratch during that stroke. The bird employed was a canary, and the actual marks in the last experiment were such that each wing stroke had rubbed off an im print somewhat resembling the whole line of an interrogation point. The fully extended wing, at the commencent of the down stroke, first rubbing off a broad curved streak, and then gradually tapering this streak upon a curved line to a point as the wing became flexed, ready for the up stroke. (To be continued.) The Cruver Tractor, No. 7. Mr. A. Cruver (Chicago, U.S.A.), sends us the accompanying AREA OF RUDDER A 3Q.IN. A CRUVER TRACTOR NO. 7. AREA OF MAIN PLANE 130 5Q IN. AREA OF TAIL PLANE 30 SQ.IN. -3"-4 M<\ Cru/er's Model. illustrations and account of a small tractor, 175 oz>. in weight, which will no doubt interest some of our readers, 'j"This model is the seventh tractor that I have built, and is ot quite light weight, viz., if ozs., including the rubber motor, which (/yew) consists simply of two strands of J-in. strip ar.d one strand of -fa in. strip. The fuselage is built of white pine, ihe two front members being J in. by J in., and the rear, J in. by \ in., tapering to J in. by 4 in. The simple skid is made of hickory, f\ in. by T'a in. The model rises quickly from the ground without the use of wheels, doing so in a distance of 5 to 6 ft., and the first flight made under such conditions was 20 sees. The main plane, although light, is not flimsy. The front and rear spars are of willow T*B in. by J in. and f« in. by TV in. respectively ; both members taper towards the tips. The tips of the wings, which are of hickoiy ^ in. by -fa in., are steamed and bent. The part made from hickory is indicated in the drawing by the heavy line at the extremities of the plane. The ribs are of white holly vtneer 5 in. by ^g in. The front spar is of streamline section. The tail is made of hickory Ttj in. by iV in., and the cross sections are white holly $ in. hy^gin. Theiudderis made from No. 12 piano wire. All surfaces are covered with doped chiffon. " The model's present records are : Distance, 291 yds. ; duration, 54 sees. These are the Illinois Model Aero Club tractor records, of which club I am a member. " The photos., although small, may give you an idea of the model in flight. One is of a model made after the drawings of Mr. Mr. D. Hiscox's model flying at Hendon, prior to its unfortunate collision with a motor car. Horner's 2-oz. tractor. I may add that it was my first tractor that really flew." Model Scale Drawings which have Appeared in "Flight." For the convenience of our newer readers, we give the following HICHT Mr. Cruver's model, built from the drawings of Mr. Hornen's,2 oz. tractor, with Mr. Cruver's own launching arrangement. This model made 26 sees, duration and 621 ft. distance, the U.S.A. official records at the time. 1233
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
