WRIGHT BROTHERS BAKER 221 



SIGNAL CORPS SPECIFICATION, NO. 486. 



ADVERTlSEMEirr AND SPECIFICATION FOB A IIKAVIEK-THANAIR FLYIXG MACHINE. ^ 



To THE PCbUC: 



Sealed proposals, in daplleiite, will be recelvo'l at thin ufDce untit 12 o'clock noon oit Kelirunry ], 

 1906, on behnlf of the Dofird of OrJnaQce and ForliftcAtion for furnishin;; the Si:!iml Corpt with » 

 heiivier-thAn-iiir flyEng iDAchlne. All proposaU roceiveJ will be larned ovtjr to tlie Itu^nl of Onlimnce 

 and FortiflcAiioQ At its rirst meeting after February 1 for itn offlcinl Action. 



Persons winhin;; to submit propoiitl^ umler Ihi^ fip^ciAcnlion c^ti ohLiin tlie noci*i'«iry forin^ Amt 

 envelopes by appUcjition to the Chief SiRrmI Otficer. UnitoJ Strtte-* Anny. Wnr Depnrinmnt, Washin^'ton, 

 D- C. The United Slates reserves the right to reject iiny and all propn^MH. 



Unless the bidders are also the m tiiufAi^turHM of the flying michinn ihoy miiHt'fitJtto the riHino ami 

 place of the maker. 



Preliininanj. — This Hpccification cover* the conHtruction of h 6y in;; machine sup |mr ted tMitirely by 

 Iho dynamic rtviction of the atmosphere nntl having no giw bas- 



Aceeptance. — The flying mucliine will be accepted only Bflor n successful triiil fli^rht. during which 

 it will comply with all requirements of this spociflcHtion. No payments on acwunt wiU be made untit 

 after the trial flight and at-ceptnnce. 



Inspection, — The Government reserves the right to inspect any and all proueitra of matiiiftii*ture. 



GCNBRAL REQaiREUBNTS. 



The general dimensions of Che AyiiiS- machine will bo determined by the m»itorivctur«;r, Kubjcct U> 

 the following conditions: 



I. Hidden muil submit with their propo-iiUs the following: 



(o) Drawings u> scale showing the general dimensions and shape of the flying machine which 



they propose to build tinder thin npcciflcjilioii. 

 (6) Staement of the speed for which it is •tcsigned. 

 (c) Statement of tho.iotHt HurfHco area of the supporfing planes. 

 (<f) Statement of thc'totJil weight. 



(r) Dtvicription of the engine which will be use<l for motive power. 

 {/) The mjitcrial of which Iho frame, phincs, and propi-llcr* will be constraeted. Pinna n'oclvcd 



will not be shown to oilier bidders. 



3. It is desirable that the flying machine should be designed so that it may be quickly nml ea.^l1y 

 Assembled an<t Liken apart antl packed for traiispnrtation in army wagouH. It should be oipablo of 

 being asscmldctl anil put in operating condition in aliont one hour. 



'.i. The flying mrtcliiiie must bo de^ignrd to carry two persons having a combined weight of nboot 

 350 poundn, also suflicienl fnol for a fligltt of 1*25 miles. 



4. The flying machine sliould Iks designed to have n spcwd of al least forty miles per hour In etiU 

 air, bat bidders must submit quotations in tlieir prupositlH for cost dupctuHng upon the speetl attained 

 during the Irittl flight, accortling to the following pade: 



■itrmtfes pex Kour. 100 per cent, 

 3!i miles per hoar, 00 per rout. 

 38 miles per hour, 80 por cent. 

 37 miles per hour, 70 per cent. 

 3G milca per hour, GO per cenL 

 l<eKt» than 3C miles per hour rejcctml. 



41 miles per hour, 110 per cent, 



42 milea pur hour, 120 per cent. 



43 niilcit per hour, 130 per cent. 



44 miles per hour, 140 per cent, 



5. The flpcod nccumpliahe*! during Iho trial flight will bo determined by faking an nvcr.ige of the 



time over a in«n»ured course of more than flvo miles, ngninst and with the wind. The time will be taken . , ■ 



by a flying stJirt, passing the starting point at full speed at both ends of the course. This test subject 

 to such additional details as the Chief Signal Officer of the Army may preseritm at the time. 



6. Ilefore acccptnnce a trial enduraneo flight will be required of at least one hour during which time 

 tlio ftying machine must remain continuously hi the air without Iiinding. It shall return to the starting 

 point and land withotit any damage that wouht prevent it immeitiately starling upon another flight. 

 During this trial flight of one hour it must be steert'd in all directions without diffieiilty nnd at all timeit 

 under perfect control and equilibrium. 



7. Three trials will bo allowed for speed as provided for in paragraph? 4 and 5. Three trials for 

 •ndurance as provided for in paragraph 6, and both tests must be completed within a period of thirty 

 days from the dale of delivery. The expense of the testa to bo borne by the manufacturer. The pluc* 

 of delivery to the Government and trial flights will be at Fort Myer, Virginiju 



S. It should l>e so designed as to nscend in any country whirh may be encountered in field service. 

 The starting device must bo simple and lran**porUble. It .should also Und in a fleld without requiring 

 a specially prrpareil spot and without damaging its strnctiire. 



0. It should l)e' providcil with some dcvicw to permit of n aafo descent in case of an accident lo the 

 propelling inijchinery 



10. It shwild bo sufficiently simple in its construction and opcralion to permit an intelligent man to 

 become proficient in its use within a reasonable length of time. 



II. Bidders must furni^>h evidence that the Government of the United Stutcs has the lawful right lo 

 use nil patented dcvi<-es or appurtenances which may l«c a part of iUf flyin;; machine, nnd that the 

 nan u fact urers o( the flying machine arc authorize^l to eoiivci" the same lo the Government. This refers 

 lo the unrestricled right to use the flying machine sold to the (Uivemincnt, hut doi-s not <*oiitcniptate the 

 exclusive purchase of patent rights for duidiealing tlie fl) ing machine. 



Vi. Uiddcrs will l>o required to rurni^h with their propasal a certified elicek nnuinuting to ten 

 percent of the price slated for the 4()-ini!o speed. Up«»n mnkiiig the awmd for tin* (lying machine 

 Iheso certified elirckswill bi» returned to the bidders, and the successful bid.lerwill K-nMiniied tofurnivU 

 ft bond, acconling to Army Uegulations, of the amount equjd to llu? price stated (or the 4u-niilc speed. 



13. The price quutoil in propa<<aIs must bo undersloo^l to include the instru<-tioii nl two uieii in tho 

 handling and opcratluu of this flying machine. No extra charge for this service will 1hi .-dlmved. 



14. Iliddcr* must aUitc the liuic which will b« r**quircd for delivery after rweipl of order. 



JAMF„S AM.KN, 

 Briijadier Cfncrol, Chief Si'jmt! Ojjivcr of the ^nny. 

 Signal Os^ce, 



WasiiixjtuW» U. C, December M, 1007. 



Figure 4. — Reproduction of the specification sheet for the first U. S. Army 



airplane. 



