posted on Jan, 22 2012 @ 01:27 AM
This is my BTL-4 Design and you can see where the date falls, it's at 22 Oct, 2008
What's so special in the design is it improves upon the pure flying wing concept. We all know flying wings combine efficiency and robustness not
found in conventional aircraft design. My design would have also improved efficiency further by the ability to use other airfoils (pure flying wings
are limited to airfoil designs that put more emphasis in stability at the cost of reduced efficiency) and to improve agility/STOL performance which
pure flying wings lacked. Pure flying wings could not equip flaps, devices which help to dramatically shorten take-off and landing runs.
The layout I came up with is the result of maximizing fuel efficiency up to high subsonic speeds. Both the front the rear wing generates lift in most
conditions so keeping parasitic drag to a minimum. The rear wing is raised to keep it away from front wing downwash to improve lift coefficients.
Simulator tests have demonstrated significantly higher Lift over Drag ratio (measure of efficiency of aircraft design) than a pure flying and
approached that of high performance gliders!
A year after the unveiling of my BTL-4. Boeing was the first to wind tunnel test their design for USAF's 'Speed Agile' STOL cargo craft program in
late 2009. For emphasis, this was done 1 year after I disclosed my design publicly! Here are their designs including Lockheed's:
If the link above doesn't work, try googling 'Speed Agile'. The link with 'aviationweek' should be the same article and it will show the dates.
The only key differences are:
- Stealth features which my BTL-4 lacked. It is not a high priority in my design and not considered. If I pursued stealth then it is most logical to
use a V-Tail, and put jagged edges on the engine nacelle's and other parts of the aircraft. It would look exactly like Boeing's concept.
- Lockheed's 'below wing' engine placement. I would not have chosen it due to increased chance of foreign matter ingestion. STOL's are presumably
expected to operate from unpaved surface. 'Over wing' placement also enables harnessing of 'Coanda Effect' for improving STOL performance further.
Multiview pics of my 'BTL-4' design. It received a Copyright on 2008. Discuss!
edit on 22-1-2012 by ahnggk because: (no reason given)