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SNAW FA-88 (Variable Geometry)

48.9k Baldovino  7.8 years ago

My first project with variable-geometry applied to three-dimensional wings (And quite frankly, I seem not to have seen others with this combination in SimplePlanes).

The plane flies very well, is easy to handle, fast and very balanced with both the afterburner added than without it. However has a significant DRAG, and it tends to lose energy easily in violent maneuvers. It also has a rather high speed stall, then flies it carefully if you are at low speeds, avoiding abrupt movements.

The variation of geometry is fully automated, linked to the nose-up commands. The wings extend when pitch up, and retract diving. This move the COL forward and backward according with the lifting surfaces for easier maneuvering, and this can be easily observed by locking and unlocking the wings with AG1. I developed this concept in one old project but it did not have the three-dimensional wings (link below). You can experience the flight with wings locked in any position by disabling AG1 when the wings are in the desired position.

Take-off and landing operations can be performed with the wings in position "automatic", but are more easy if you block wings in the forward position, just by using the command to pitch up and then disabling AG1 while they are fully extended.

The armament placed under the wings is automatically pointed straight ahead during the geometry changes. Blocking wings disabling AG1 also blocks the armament in the correct position. In addition to these four missiles the aircraft is equipped with two rotary cannons to a high volume of fire. You can replace the missiles with any combination of weapons. The plane files whell with 4 x Boom 50 too.

A large number of cameras is spread around the aircraft, allowing spectacular shots of the moving parts (rear nozzle, Gear with landing lights, wings, and other interesting view great video recording)

OLD CONCEPT - https://www.simpleplanes.com/a/v854Yj/SNAW-VG-2-Pigeon-V3

User Manual:

1 - Lock and unlock the wing geometry changes
2/3/4/5 - Wing Missiles
6 - Brakechute
7 - landing and navigation lights ON / OFF
8 - Afterburner
B - Brakes
G - Gear Up / down and landing light retracted / extended

Spotlights

General Characteristics

  • Successors 2 airplane(s)
  • Created On Windows
  • Wingspan 30.9ft (9.4m)
  • Length 37.0ft (11.3m)
  • Height 12.3ft (3.8m)
  • Empty Weight 5,846lbs (2,652kg)
  • Loaded Weight 5,846lbs (2,652kg)

Performance

  • Power/Weight Ratio 28.828
  • Wing Loading 22.8lbs/ft2 (111.5kg/m2)
  • Wing Area 256.0ft2 (23.8m2)
  • Drag Points 4744

Parts

  • Number of Parts 94
  • Control Surfaces 9
  • Performance Cost 622
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  • Profile image
    48.9k Baldovino

    @ChiChiWerx I did not understand before I started the work. During work I understand how difficult is to do a "fluid" junction between wings and fuselage. And the difficulty is increased by the fact that we can not use the mirror function (or any moving parts are welded to each other by canceling the function). Doing a simmetric fuselage, junctions, wings and 3D over structure on the wings by hand was a pain.

    7.8 years ago
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    30.3k ChiChiWerx

    Nice work, variable geometry with 3D wings, wonder how many realize this accomplishment. You say so in your description, but does anyone realize how tricky that could be?

    7.8 years ago
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    15.6k Sparrow007

    Awesome!

    7.8 years ago
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    48.9k Baldovino

    @BogdanX Examined the speed problem, and I have not the same data.

    1% thrust with no AB I stall @ 115 mph (AG8 disabled)
    1% thrust with AB on I barely fly @ 174 mph (AG8 enabled)

    Maybe different phisic settings?

    7.8 years ago
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    28.4k JShay

    @Baldovino Great plane! Love the design, and the yaw is awesome :)

    7.8 years ago
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    48.9k Baldovino

    @JShay thanks mate

    7.8 years ago
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    48.9k Baldovino

    @BogdanX This is absolutelly true, I had a lot problems with the homungus drag due to 3D structure. The plane loss a lot of energy at any single manuver, and in some cases it stall. So I doubled the power of the standard engine.

    Surely you did, but did you try to fly without afterburner? With no AB on, I was sure that the speed is not so insane.

    7.8 years ago
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    48.9k Baldovino

    @BogdanX partially agree, but If I think to the F-4 or F-111 (more or less this seem about the same "age") they are over Mach 2. By the way, I respect your opinion, and I sayd, partially agree.

    7.8 years ago
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    48.9k Baldovino
    7.8 years ago