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Remote Controlled; Scale Jets

Discussion in 'The Ten Mile High Club' started by Jet News, Feb 27, 2018.

  1. Jet News

    Jet News JF News Editor Staff Member

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    Dash 8 Q400 paper model flying indoors.

  2. HTMO9

    HTMO9 Senior Member

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    Why going always bigger? How about going micro RC? Amazing, that little plane could even take off on its own.



    The role model is actually the largest (semi) production glider in the world. I have flown in one of it once. Pretty strange control caracteristics. This uge wing span causes a lot of adverse yaw and You have to get used to the large upward deflection of those thin wings. During maneuvering You need a lot rudder input. A several hour flight feels like biking in the mountains :).
  3. HTMO9

    HTMO9 Senior Member

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    Here is the giant role model of the ETA. Off field landings are not really an option with this wing span.

  4. Jet News

    Jet News JF News Editor Staff Member

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    The flex is insane!
  5. HTMO9

    HTMO9 Senior Member

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    The glide ratio of this glider with its 100 ft wing span is even more insane. It is 1:70, means out of 6.000 ft height above ground and in smooth air, it glides 70 NM. When I started glider flying, the average glider aircraft had a glide ratio of less than 1:30.

    There is a running gag in the glider clubs about those very high performance gliders, where they make fun of the young flying studends with: It is called the critical glide ratio. Means, its glide path angle becomes smaller than the curvature of the earth. Which in turn would cause the glider to finally end up in space :). Total BS but most greenhorns fall for this.

    After looking at the video of this perfectly build Tornado ECR model again, I now understand, how they managed to build and operate this very complicated wing assembly and flight control system. They just did not bother to build flaps, ailerons and spoiler. Just a clean hard wing with variable wing sweep. All pitch and roll control at all wing positions is done by the tailerons. That also explains the pretty high final speed. With the little RC model it seems to work. The original plane would have gone out of control. Great model and perfectly flown. The inflight picture is very realistic.
    Jet News likes this.
  6. Jet News

    Jet News JF News Editor Staff Member

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    Words of wisdom, thanks!
  7. HTMO9

    HTMO9 Senior Member

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    My two gliders are concidered high performance gliders also. The single seater (ASH 31 Mi) has 69 ft of wingspan and a glide ratio of 1:56 and the double seater (ASH 30 Mi) has 87 ft of wingspan and a glide ratio of about 1:63. But in a competition with the Eta, I would not have a chance. There is a world in between. But at least my birds are self launching with a retractable 56 HP Wankel Engine and I can assemble and disassemble them and load them into the trailer on my own without any external help.

    As far as variable wing sweep is concerned, I think the days of aircraft with variable wing sweep are over. Both for combat jets and any civil appllication. Modern aerodynamics have made them obsolete. The reason for the Tornado build that way, were the military doctrine at the time of its design. Short takeoff and landing distances on partially destroyed runways due to high lift wings and thrust reverse but high low level ingress and egress speeds in the air to ground role with automatic terrain following in all weather (plus / minus 4 G at 200 ft AGL at 600 KTS + in all weather).

    This was made possible with a very complicated wing assembly and control system and jet engines optimized for low altitude. Plus the final layout was politically influenced. The aircraft would have needed twin vertical tails like the F-18 for high AOA maneuvering but a two tailer would not have fit into the standard NATO Shelter.

    The limitation chapter in the pilots handbook was so complex, that no pilot could remember all figures. And some of those limits were really important. For example the high vertical tail had an AOA limit of 22 units. Above that limit, the tail startet vibrating violently and it could actually break off. But with that limit, You had no chance to win any air to air dog fight. So one or the other crew came home without the ECM antennas on the top of the tail. Great performing but crazy aircraft and now a thing of the past. And the guy who designed the front cockpit should be shot. I think it was a british navigator :).

    British cockpit design was done by making a hole in the sand and then throwing a bag of flight instruments into that hole. Where those instruments came to a rest, they got bolted in in the real coclpit. The only compromize the British accepted, was placing the pointer of those instruments towards the pilot :p.

    Sorry, I could not resist.
  8. Jet News

    Jet News JF News Editor Staff Member

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    YF-12... is this the same plane as the SR71 Blackbird?
  9. HTMO9

    HTMO9 Senior Member

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    How about a twin turboprop RC King Air



    Very nice model
  10. Jet News

    Jet News JF News Editor Staff Member

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    Wow...
  11. JetForums

    JetForums Publisher/Admin

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    Impressive model. If the weather was any worse, IFR conditions would apply.
  12. Jet News

    Jet News JF News Editor Staff Member

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    RC Pilatus PC-24

  13. JetForums

    JetForums Publisher/Admin

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    Holy rotor wings, that's a large Lama! 10 minute flight time is impressive too.
  14. Jet News

    Jet News JF News Editor Staff Member

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    A carbon fiber/fiber glass A350XWB made by RAMY-RC! You can follow along as he builds this plane.

  15. Jet News

    Jet News JF News Editor Staff Member

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    Part 2

  16. Jet News

    Jet News JF News Editor Staff Member

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    Part 3

  17. HTMO9

    HTMO9 Senior Member

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    Not a jet but almost as fast and almost as good looking as one.



    Perfectly built and even more, perfectly flown. Looks like this scale model has a very realistic power to weight ratio. Only this outside turn would make Your eyes pop out of Your head in real life.

    The Pc 21 is EASA and FAA certified as a civil and military aircraft. To bad the German authorities do not allow privately owned civil aircraft being equipped with ejection seats.
  18. HTMO9

    HTMO9 Senior Member

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    Yes, it is basically an advanced trainer for several airforces all over the world but it can also be used for basic weapon training with onboard software simulated weapon delivery and with its excisting hardpoints under the wing for smaller weapons (gun pods), missiles and small bombs. It is offered for COIN operation and air policing against smaller aircraft and helicopters.

    But for broaden her market, it was EASA and FAA certified for civil use. But as said before, several European countries do not allow civil aircraft to be equipped with ejection seats. And without an ejection seat, You would likely not be able to leave this HPA in the air, if anything goes badly wrong during acrobatics for example.

    Anyhow, great flying machines, both the RC version and its role model.
  19. Jet News

    Jet News JF News Editor Staff Member

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    The model sounds like a real turbine engine!
  20. Jet News

    Jet News JF News Editor Staff Member

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    Some R/C action...