NO. •> LANGLE1 MBMOIB ON MECHANICAL FLIGHT [45 



;;,,(l feet. It continued straight ahead for another 300 feel and began to circle 

 in the left, the diameter of the firsl circle being about 200 feet. As soon as ii 

 itarted to circle, it rose with its midrod a! an angle of aboul L5 degree , and 

 by the time il had made its firsl half turn il started to descend, coming down to 

 within 1f> feel of the water. As soon, however, as il had completed this first 

 turn, il again rose, making another half circle, then, upon the completion of 

 this hall' turn of the second circle, descended, this time to within in feel of the 

 water, rising again for the third half turn, but again descending to within 2 feel 

 of the water al the completion of this third circle, and then rising and complel 

 in- the firsl half turn of the fourth circle. By this lime, however, it had sunk 

 s<> near to the water thai, the guy posts caught in the tall grass while il was de 

 scending jusl before the completion of the fourth circle, thus pulling the aero 

 drome down into the water with the propellers still running. The total lime 



the aerodrome was in the air was 46 seconds. The total niimher of revolutions 



of the propellers was 488, or al the mean rate of 637 R.P. M. Upon examining 



the aerodrome, after it was recovered, it was found thai there were 925 gramme 

 of water left in the separator, the fire having been put, out, by the aerodrome 

 coming down into the water. 



When the aerodrome first commenced to circle during its flight, it was no 

 ticed that the front wing clamps had twisted on the midrod, the left wing being 



dipped downwards, ami the righl one, of course, being elevated, ami the i uliar 



circling of the aerodrome was undoubtedly due to this fact. The cause of the 

 wing chimp twisting on the midrod was that one of the workmen forgo! to 

 tighten one of the screws of the wing clamp when the wings were being adjusted 

 on the aerodrome. Bui for this unfortunate twisting of the wings, il is probable 

 that the flighl would have been perfectly straighl and the distance covered would 

 have been considerably greater than it was, the total path traversed being aboul 



2600 lo 2800 feet, found by plot I inn the path on the COast-SUrvey chart and in' . 



uring it. 



.li'i.v L'7 AEBODBOME SO. <i 



As the proper balancing of both Aerodrome No, 5 and No. 6 had now been 

 determined with reasonable accuracy, and as much more time had already been 

 given to the experiments than had been intended, it wns decided to dismount 

 the " overhead " launching apparatus al once and substitute the " underneath " 

 one. bo thai it could he immediately determined whether this newer plan for 

 launching the aerodrome by a car supporting it from underneath would he suit- 

 able for use with the large machine. After a considerable period of exceedii 



had weather, during which lime the change was made in the launching app.i 



ratus, the weather condition- became more favorable on July 27. Aerodrome 

 No. <;, equipped with " single tier " wings and remind tail, was mounted on the 



14 



