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Rotorcycle
Rotorcycle
Junior Member
Last Activity: Today, 01:25 AM
Joined: 04-18-2015
Location: Surfers Paradise
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  • Rotorcycle
    replied to Manned Quad-Copters
    The subject of stability is long and complex especially when you consider human responses to effects of forces. If I close my eyes and turn deaf for a few moments and the pilot in command places the aircraft in a steep climbing attitude do I feel the pressure of the seat increasing against my back as...
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  • Rotorcycle
    replied to Manned Quad-Copters
    I saw a number of photographs of the Aerotechnik and some brief info but no photo's of it in any form of flight. It apparently used rotating booms for directional control.
    Both it and the convertawing had the CG well below the rotor tip path planes which would produce a dynamically stable aircraft...
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    Last edited by Rotorcycle; 11-16-2017, 08:52 PM.

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  • Rotorcycle
    replied to Manned Quad-Copters
    This Translated version may help!
    This is an incomplete section of the full report and the Google translation requires a bit of guesswork!...
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    Last edited by Rotorcycle; 11-13-2017, 11:33 PM.

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  • Rotorcycle
    started a topic Manned Quad-Copters

    Manned Quad-Copters

    I feel a new topic for general coverage of full sized manned multi-rotor aircraft is more appropriate than placing them under the banner of "DFC Rotor Heads".
    I also acknowledge many readers and members have devoted much time and effort in the pursuit of electric powered multi-copters...
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  • Rotorcycle
    replied to DFC Rotor Heads.
    Certainly something to run with!
    Dysentery I mean!
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    Last edited by Rotorcycle; 11-10-2017, 04:30 PM.

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  • Rotorcycle
    replied to DFC Rotor Heads.
    Air-frame for this Quad copter is nearing completion however rotor dynamics is beyond my scope as is with most people.
    Calculating the teeter required to cancel or minimize the bending loads on the shafts etc through dissymmetry of lift is in the "too hard basket" for me.
    I believe...
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  • Rotorcycle
    replied to DFC Rotor Heads.
    Thanks Chuck, Just off the cuff how does the Gen-H4 manage with non teetering heads and it is spinning 13' diameter rotors? Dwg. looks as though it has dampened lead lag hinges,
    Also the tilt wing is does not appear to have these problems??
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  • Rotorcycle
    replied to DFC Rotor Heads.
    Thanks Chuck, your reply is appreciated and respected and I can only agree with you regarding a typical single rotor machine relying on cyclic for directional control however a pitch controlled Quad-copter would not require cyclic control. Neither Franz Schofman's or the GEN-H4 have any form of teeter...
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  • Rotorcycle
    replied to DFC Rotor Heads.
    Ok! There's been 70 views to date and not one response or explanation of the questions presented!
    There are YouTube videos of the Schmirl "Red Bull" model with flight views from attached cameras and these offer no indication of vibrations or rough flight.
    Lets forget the models...
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    Last edited by Rotorcycle; 11-06-2017, 04:24 AM.

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  • Rotorcycle
    started a topic DFC Rotor Heads.

    DFC Rotor Heads.

    Regarding Direct Flight Control rotor heads as used on numerous models these days but in particular the larger unit used on Josef Schmirl's R/C "Red Bull" model helicopter.
    This model has a Rotor diameter of 131" or 10.9 feet. The main feathering shaft is a loose fit in the main...
    Typical DFC Rotor Head.
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    Last edited by Rotorcycle; 11-04-2017, 10:57 PM.
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