23857122-0457-180273-0098

‘ fa r bs “ { > Tar +} obs 5 r Wa TO a 3 7 Lv FY 3+ "i AVE) A. ye 4° f- < 7 S zi \ C } WOLlC AU VLA J. Ah he UE IK a a Ul Oil’ SiZSs, i ay } ie - P joes =, d e Fa nae be ae r mor likely, Chey were Lar cnougn from the observers so that bin- ¢ a ot ee ee eee pe ee * ee oe en , ae a 4 1% ocular vision voroduced no stereoscopic effect; snis oniv means that they . Pe F 4 a" , ae ee Q ‘ +\ oe A = i were farther off than abo nirvty feet; c« 76 objec ere seen to adise YOe ar jei Yi CG Y*e 4 41) ls “nee oo UGS 2 T778 Apt . Yon > ~ N17 oe} + Ch bd IO A Go 4H ULS ma, WU SUL 2g WLVUUS < Woy \ if ASA S 2 = OTIOUSH 10 be visible a e ranges of those rec Ile objects. FF ss y Fe ee ra) “ 4 rn vio o & 2 OW LG 28 Ovuviously of prime importance to estinats the size and mass of thre observed objects. This may be possible to some exte e 3e i - n +}. - } . - r } r i pernissable As sume t 4) obe jaws of physics. Since the ob- ; ects have not bee bserv to produc r Sica ffects, other than . — , ee : ore ' att ~ g tke . antar< : : the one case i} iish a cloud was evaporated alongs + trajectory, it is , i : aoe ee ‘ oe 4 , SN i $ ye Pees ; cay eve 1 syattDein st a not certain that the laws of mechanics ? Or UNStance, would oe SULTICLENv. - 4 “ od _ 4 ee e i. oo 4 . * - = - P 4 2 - oo wt a But sunovose thst mechanical Laws alone are sufficient hen the PA} ony & S, : Of s ’ a Pa) ‘es : eS 3 following example is sufficient proof that at least a lencth could, ir ‘ ; principle, he determined: suppose a simple pendulum were observed suse ° oy @ ee 5. 43) Ae cr de 8 143] cn ct ras) rs hy 9 aa) ae Oo x $4] 4) Le | J f+ . ek ct cn a ry ) igi 2 & QQ Oo oOsci llation we could deduce from the laws of mechanics its vorecise lereth or This sureests that somethine could be deduced from the observed flutter- : ine motion of some of the objects of Group 1. Assume that we know the ange oes ular frequency and angular amplitude of this i a) measured ir principle from a motion picture). Then for purposes of calculation -} assume the object to be thirty feet in diameter, to be as rigid as a normal : BJ. 2 . n 5 x + : a " 5 ve " £ » fe ny 1 7 -, — on sircraft wing of 40 foot span, to be constructed of material of the ovtinu weichtestrenrth ratio and to be a structure of most efficient design. It is now possible to calculate how heavy the object must be merely to remain £ : ‘ ) “wal —. y on rat 4 = rn oe py eS a ae rigid under the observed anzulear motion. Let the caluclation be made 7 3 } . f 4 je Fs) ‘ ca a oo i cia ae ot Spee ; ‘ fe ay : ae Bia se ee for a plurality of assumed sizes 1, 2, 4, &, 16, 32, Gy -=--= up to say Declassification Authority: NND 57565