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Tu-314 1970s highspeed turboprop regional liner

13.8k vonhubert  7.7 years ago

4th bloody attempt) hope i've left no hickups that time)

This is an update of my "what if" Tu-314 airliner model. Basically, it is a Tu-134 equipped with turboprops like a small Tu-114 and a wing moved forward to correct the weight destribution with engines in front. It represents a "What If" airplane that combines highspeed swept wings and rugged landing gear of a tu-134 with fuel efficiency and low altitude performance of a commuter turboprop. And IMHO, it looks more elegant than your average Bombardier Dash SMTH of generally same size)

If i was a millionaire and this plane existed in real life (or i was a billionaire and had enough money to finance the R'n'D for such an upgrade for existing Tu-134) - this would totally be my choice for a long range businessjet (or is it a busines-prop?)))

This time completely refined the old model (https://www.simpleplanes.com/a/kRjRlW/Tu-314) with updated wings, engines, new cockpit and new langing gear with synchronised doors.

Controls:
Warning! Turboprops are pitch controlled! Thrust controlls the propeller pitch with engine governor maintaining the engine RPM. This way it is on nk-12 turboprops from tu-95 and tu-114. Thus:
1) Below 20% thrust they essentially work as VERY powerful airbrakes. Never drop below 25% thrust inflight unless you need to drop speed fast.
2) optimal thrust for cruise flight - 70-75% at 28 000 ft.
3) optimal thrust for take off and low altitude - 90-100%

G - Landing gear;
AG1 - emergency braking parachute
AG2 + VTOL slider - Flaps; (0% = Flaps retracted, 100% DOWN = Flaps deployed for landing, 50% - takeoff position)
AG3 + VTOL slider - Spoilers (= Airbrakes, , 100% UP = Deployed, 0% = Retracted, i added a compensating mechanism to the stabiliser, but still tends to pitch up the plane a bit, use on approach with partial deployment (pitch compensator works between 0 and 1/2 UP, above that it pitches down to push plane to the runway) or after touch down with full deployment)
AG6 - Landing lights;
AG7 - Nav. Lights;
AG8 - Ground steering (sensitivity adjustment, when AG8 deactivated - steers to the limit, when activated - steers 5 degrees) Positions - AG8 - ON on Take off/Landing, AG8 OFF for the ground movements

Take off procedure - Trim 1/2 up, flaps 1/2 down, full thrust , Rotate at about 150 MPH
Landing procedure - Full flaps, trim ~ 70% up,35% thrust with full flaps at approach, 25% near the runway, approach speed 200 mph, over the runway drop thrust to 15%, deploy spoilers (AG3+ VTOL UP) if needed after touchdown. If bounced up, do not pitch down, just let it drop gently, nose down touch can be fatal).
Ascending - 90% thrust, trim ~20% UP.
Level flight - 75% thrust, trim ~10-15% UP.

Spotlights

General Characteristics

  • Successors 2 airplane(s)
  • Created On Windows
  • Wingspan 97.6ft (29.8m)
  • Length 111.7ft (34.0m)
  • Height 31.5ft (9.6m)
  • Empty Weight 44,619lbs (20,239kg)
  • Loaded Weight 98,674lbs (44,757kg)

Performance

  • Horse Power/Weight Ratio 0.121
  • Wing Loading 33.3lbs/ft2 (162.5kg/m2)
  • Wing Area 2,965.2ft2 (275.5m2)
  • Drag Points 26961

Parts

  • Number of Parts 657
  • Control Surfaces 3
  • Performance Cost 3,584
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  • Profile image

    @vonhubert nice project in any case

    7.7 years ago
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    13.8k vonhubert

    @mikoyanster thanks! Although its at best 50% replica) and 50% fantasy)

    7.7 years ago
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    Very nice design! Good job Good replica!

    7.7 years ago
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    13.8k vonhubert

    @AudioDud3 you can make some simple steps to fix:
    1) go to engines settings
    2) set pitch to auto
    3) delete AG assigned for throttle input if you want. If not - AG4 - left engine, AG5 - right.

    however, this seems to reduce speed a bit

    7.7 years ago
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    13.8k vonhubert

    @AudioDud3 hm... its definitely different on PC... it just rolls gently no more that 1 mph. I'm suкprised you can play at all on mobile, usually my planes play a slideshow on most mobile devices... i will upload one with conventional engine controlls for you, probaby mobile devices treat engines with throttle governor differently

    7.7 years ago
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    13.8k vonhubert

    @AudioDud3 well, yeah, it rolls a tiny little bit at idle, but i dont think its that critical. you can hold it with breaks easily. Will try to fix in the next turboprop.

    7.7 years ago
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    13.8k vonhubert

    @AudioDud3 its becuse the throttle controls the propeller pitch with engine governor controlling the engine. But it should not move at 0 throttle, as the props are at 0 pitch. If it moves, i might have made another mistake. Will check out

    7.7 years ago
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    13.8k vonhubert

    @Sarpanitu i have uploaded it 4times and deleted 3 after finding mistakes)

    7.7 years ago
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    13.8k vonhubert

    @AudioDud3 thanks. But its actually on my average parts count of 650) most others have about the same number, 550-750)) didnt think it will manage the mobile

    7.7 years ago
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    Awesome!

    7.7 years ago