Miracle
Miracle Specifications: 43 inch wingspan / 27inch length / 290inch wingarea / 18 to 21ounce weight / 8 to 10ounce wingloading with a flat bottom airfoil.
Control: elevons.
Equipment: Hitec 555 or 535 receiver, 7.2v speed 400 motor, Robbe 6x3.5 folding prop, 7 - 500ma or 600ma Cells, Jeti JES10 or Viper Micro Demon 102 ESC w/BEC an Brake, two Hitec HS-80 servos used as elevons.
Construction materials: Balsa, spruce, 1/16 plywood and covered with Monocote.
Comments: The Miracle evolved from the idea that weight is the biggest problem with a successful electric plane. So, anything that wasn't needed was eliminated. Thus a flying wing. The Miracle has a flat bottom wing and a 1/16" plywood fuselage. It is easy to build. It features a plastic hatch that doubles as a landing skid. The hatch is attached with velcro and makes for easy battery changes.
The Miracle is a lot of fun to fly. It does loops and rolls but the flat bottom wing prevents inverted flight. It soars good and flights over 20 minutes are possible. Its like flying a slope plane except you can fly it almost anywhere but it is a bit fast for a park flyer. I have flown it in 20mph winds. It is a sturdy plane and takes a lot of abuse. I have landed in trees hit fences and bushes the hazards from flying from plowed fields. The low motor current and ease of quick battery changes means you can fly continuously without overheating the motor. I like taking a set of charged batteries, plane and transmitter and go flying.
Something not readily noticed is that without a horizontal stabilizer, when apart, the wing and fuse will lay into a small package. Perfect for taking on a trip. In fact the wing and fuse will lie out of the way in the rear window of a compact car
One drawback with a flying wing is the need to have a transmitter that has the elevon function. But this is becoming a standard function.
Miracle Plans in a ZIP file, 5 pages in .dxf format (1.2Mb)
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