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Biplanes Mystery Cache

Hidden : 12/20/2022
Difficulty:
4.5 out of 5
Terrain:
1.5 out of 5

Size: Size:   micro (micro)

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Geocache Description:


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This cache is not at the posted coordinates, you will need to solve a puzzle to find it.

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December 17,1903: The Wright Flyer's first flight at Kitty Hawk, NC
 
Bi Planes:
 
Though uncommonly sighted today, the early years of powered flight were dominated by fixed-wing aircraft with two main wings stacked one above the other, referred to as a bi plane. Indeed the first powered, controlled aeroplane to fly, the Wright Flyer, used a bi plane wing arrangement, as did most aircraft in the early years of aviation.
 
Bi planes offer several advantages over conventional cantilever mono plane designs: they permit lighter wing structures, low wing loading and smaller span for a given wing area, making them easier to control in flight. However, interference between the airflow over each wing increases drag substantially, and bi planes generally need extensive bracing, which adds weight, further limiting lift. Over time in the early 20th Century, improved structural techniques, better materials and higher speeds afforded more advantage to single wing-pair aircraft, and the bi plane configuration became obsolete for most purposes by the late 1930s, though one can still see them today in slow and typically low altitude applications such as crop dusting and recreational flight, including private aircraft and in airshows.
 
Additionally, early aviators attempted to extend the advantage of the lifting gain demonstrated by the bi plane by adding more wings, and several airplanes were configured with multiple wing pairs, usually with each wing directly over the one below it. However, these "multi planes" were mostly unsuccessful because of performance limitations, often simply because any additional lift capability was neutralized by the increased weight.
 
Since the 1930s, single wing-pair aircraft have ruled the sky. Yet, to this day, bitplanes remain significant due to an non-obvious element of stealth. For example, there are eight bitplanes hidden in the image below. Are you able to find them? If so, you will be able to discern the location of the geocache.  All are important, but the bitplane of most significance is the seventh.  And be careful when slicing -- you don't want to lose a digit!
 
 

4??5

3??6

7??1

0??2

 
 
Click HERE for full resolution image
 
Enter your solution into the certitude checker below.
 

 


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Congratulations to theladybee and blandestk for FTF!
 
Special thanks to teamajk for invaluable beta testing!
 

 

 

Additional Hints (Decrypt)

Nsgre SGS

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)