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Sikorsky S-72 "X-Wing" (Hybrid Helicopter)

41.3k MobileMobileTheFriendly  13 days ago

Sikorsky S-72

RSRA

The Rotor Systems Research Aircraft (RSRA) was developed by Sikorsky for NASA and the Army. The RSRA was developed to allow the inflight measurement of helicopter rotor characteristics. The airframe was developed using an existing Sikorsky S-61 main rotor, an S-61 roller gearbox, and a highly modified Sikorsky S-67 airframe. The RSRA could be fitted with TF34 turbofans and wings to allow compound helicopter configurations to be experimentally investigated at speeds up to 300 knots (560 km/h). In addition, it could fly as a fixed-wing aircraft without a rotor.

Unique among helicopters of its time, it was fitted with a crew emergency extraction system. This system, when activated, fired explosive bolts that severed the main rotor blades, escape panels were blown off the roof of the aircraft, then the crew was extracted using rockets.

The RSRA was a unique pure research aircraft developed to fill the void between design analysis, wind tunnel testing, and flight results of rotor aircraft. The joint NASA/Army project began in December 1970, first flight on October 12, 1976 with the first of two aircraft arriving from Sikorsky to NASA on February 11, 1979.

One notable test performed with the RSRA was the use of the main and tail rotor load measurement system to determine the vertical drag of the airframe.

In 1981, NASA and the US Army solicited proposals for fitting a four-bladed main rotor to the RSRA. Sikorsky proposed fitting a UH-60A main rotor to the RSRA in their proposal, while Hughes Helicopters proposed fitting a YAH-64A main rotor and Boeing Vertol proposed fitting a YUH-61A or Model 347 (four-blade CH-47) main rotor. In the end, this program did not proceed.

Controls:

-VTOL UP : ROTOR POWER
-VTOL DOWN : FLAPS
-TRIM UP : COLLECTIVE ROTOR BLADE PITCH
-THROTTLE : JET ENGINE POWER
-AG8 : GYROSCOPE

HELI MODE :
TURN VTOL UP, THEN TURN TRIM UP

PLANE MODE :
TAKEOFF = VTOL DOWN 50% POWER THROTTLE 100% PULL UP WHEN REAR LANDING GEAR RISE UP FROM GROUND

LANDING = VTOL DOWN 100% POWER THROTTLE 42%

ENJOY!

M.F.

Spotlights

General Characteristics

  • Created On Android
  • Wingspan 60.2ft (18.3m)
  • Length 77.9ft (23.7m)
  • Height 18.0ft (5.5m)
  • Empty Weight -113,220lbs (-51,356kg)
  • Loaded Weight 19,718lbs (8,943kg)

Performance

  • Power/Weight Ratio 17.095
  • Wing Loading 43.9lbs/ft2 (214.4kg/m2)
  • Wing Area 449.1ft2 (41.7m2)
  • Drag Points 15617

Parts

  • Number of Parts 237
  • Control Surfaces 5
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  • Profile image

    I just watch a video about this plane heli thing

    yesterday
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    This one is a lot of fun to play with. Will be using it a lot. Thanks and awesome job.

    +1 9 days ago
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    3,750 FireFast212

    nice plane, finally someone else made a helicopter variation!

    +1 9 days ago
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    23.3k KnightOfRen

    The missile knows where it is at all times. It knows this because it knows where it isn't. By subtracting where it is from where it isn't, or where it isn't from where it is (whichever is greater), it obtains a difference, or deviation. The guidance subsystem uses deviations to generate corrective commands to drive the missile from a position where it is to a position where it isn't, and arriving at a position where it wasn't, it now is. Consequently, the position where it is, is now the position that it wasn't, and it follows that the position that it was, is now the position that it isn't.
    In the event that the position that it is in is not the position that it wasn't, the system has acquired a variation, the variation being the difference between where the missile is, and where it wasn't. If variation is considered to be a significant factor, it too may be corrected by the GEA. However, the missile must also know where it was.
    The missile guidance computer scenario works as follows. Because a variation has modified some of the information the missile has obtained, it is not sure just where it is. However, it is sure where it isn't, within reason, and it knows where it was. It now subtracts where it should be from where it wasn't, or vice-versa, and by differentiating this from the algebraic sum of where it shouldn't be, and where it was, it is able to obtain the deviation and its variation, which is called error.

    +1 10 days ago
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    @MobileMobileTheFriendly i thought your gonna make the a340

    12 days ago
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    @Nerfaddict no, he just say Indonesian

    12 days ago
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    18.1k Nerfaddict

    @Sultansyarif123 what?

    12 days ago
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    Beautiful.

    12 days ago
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    8,927 AzureCorp

    someone finally made it!

    +1 12 days ago
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    20.2k tsampoy

    I just googled it.
    It exists.

    +1 12 days ago
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    Nice

    +1 12 days ago
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    @MobileMobileTheFriendly udah saya download bang yg itu, terus saya kasih senjatanya tpi ga bisa gerak bang senjatanya

    +1 12 days ago
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    @Sultansyarif123 sebenarnya C-130 udah dibikin DISINI namun ini versi Military Transport(C-130), bukan versi Gunship(AC-130)

    12 days ago
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    @MobileMobileTheFriendly bang bisa bikin ac 130 ghost rider ga bang?

    +1 12 days ago
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    @Sultansyarif123 Tengkyu

    12 days ago
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    Mantap bang

    +1 12 days ago
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    @XAircraftManufacturer @DefinitelyNotAnFBI don't do like that :v

    :)

    12 days ago
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    @XAircraftManufacturer Amazing than ever!!!!!!!!!

    13 days ago
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    1,562 TheBruh007

    Am i a plane?Or a heli?Nobody really knows.

    +1 13 days ago
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    Wow this is amazing!
    +1 13 days ago
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    @AWESOMENESS360 Thank you, and now we are have 2 X-wing on this web and 2 different model

    +1 13 days ago
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    This is so much better than my S-72, awesome job!

    +1 13 days ago
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    7,115 50CalChicken

    @DefinitelyNotAnFBI agreed, it's awesome

    13 days ago
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    7,115 50CalChicken

    @MobileMobileTheFriendly huh, ok.

    13 days ago
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    Oh man this is amazing!!

    13 days ago
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