Notices

View Poll Results: Rate the information below: [SCALE 1/5]

Voters
0. You may not vote on this poll
  • 1

    0 0%
  • 2

    0 0%
  • 3

    0 0%
  • 5

    0 0%
  • 5

    0 0%
Results 1 to 10 of 10
Like Tree2Likes
  • 1 Post By Lynx_Fox
  • 1 Post By brody

Thread: Experimental quad jet engine VTOL contraption.

  1. #1 Experimental quad jet engine VTOL contraption. 
    Forum Bachelors Degree
    Join Date
    Apr 2011
    Location
    U.S.A
    Posts
    414
    The craft will have four Jet engines, I plan to use four Pules jet engines. The engines will be mounted rotary props that will be gyroscopic balanced in a way that the thrusters always face downward on each corner of a large 30x30 square structure (doesnt have to be 30x30 just big enough so that each engine can stableize the craft effecantly), this is necessary because it gives each engine its own center of gravity, in addition a single weight will be placed in the center of this square structure so that the whole craft will level it self, this along with the rotary engine mounts provide a super stable structure for a hovering vtol platform.
    The way the craft will hover, is by using a timed fuel injection system. Pulse engines run a full power at start, and stay at full power as long as it has fuel to ignite.
    I want a computer to create a virtual surface, and know how high each engine is from the surface. Then this is where the timed fuel injection takes place. I want the thruster to "only" inject" fuel is the engine is under a certain height, so that when a engine is above a height it will shut off and essential stall and fall back to the designed height.
    This is also how lock-heeds multiple kill vehicle hovers You can watch a video here Lockheed Martin's Multiple Kill Vehicle (OLD) - YouTube With the altitude timed fuel injection system you can also control the pitch and roll of this craft, and by turning the props independently you can achieve maneuvering yaw, forward backward ect.

    Also to note, the gyroscopes will be simulated and a motor in the rotary props will correct its position, all this requires is computers, motors, pulse engines, and lightweight materials. That is why I choose pulse engines they have almost no moving parts and have a high thrust to weight ratio. of course it would all have to be perfectly calculated and lets not forget our fuel. All in all I believe this is feasible for any flight hobbyist. a easy and simple project. I have also tested this in simulation I plan to make a video soon to demonstration.

    NOTE: Does not have to have rotary engines, fixed engines are fine, but require thrust vectoring in order to achieve sufficient maneuver abilitys such as turning.
    Also by increasing/decreasing thrust in the each engines, you can pitch and roll; example increasing the two front engines well the engines in back decrease you can move the craft backwards and achieve pitch same with roll. Turning can be achieved by using counter thrust like tanks use treads to turn, one side goes one way and the other goes the opposite way.

    I believe that the mass production of helicopters has created a VTOL ideology and has blurred the VTOL Flight possibility's.



    REVISIT | UPDATE:
    From the WATER AND TILT ROTORS THREAD

    So I was thinking about deconstructing this sci-fi drop ship in a video and figuring out how it all works

    The aircraft is a vtol and uses four tilt props on each corner of the vehicle like a quad tilt rotor, the rotary prop houses two engines, probobly pulse jet engines, one aiming down [vtol], and the other aiming behind for thrust. it is encased in a aerodynamic winglet thingy with two fins at the end of this rotary prop.

    So this thread is not about the craft, it is about how the tilt props can "tilt" the entire prop with engines fins, everything is I would assume at least around 10 tons. So what if there was water involved in the tilting? Water is incompressible right, and with that lets imagine 4 square containers (for visualization purposes) lets fill them all with water, now between the top and bottom parts is a long thick sheet of metal with a rotary between the 4 containers. Because there is equal amount of water on both sides and no leaking and all is completely pressurized, not other gasses basically a vacuum with water. ect. the sheet of steel should stay in the same place. now lets drain 1.0 amount of water on the left bottom volume, it now has a pocket of vacuum, now at the same time we drain the bottom left volume we drain 1.0 of water on the top right volume. so now the sheet of steel should be 5 degrees tilted.
    you should get the idea now.
    (Note: all of this is not a design, it is a simple physics concept that can possibly be used for tilt rotors.)

    I don't know if this would be effective in real life but seems like it would be. I am curious to know any machines that use this method for moving massive objects or heavy objects.

    edit: The scifi drop ship I was talking about.
    D77-TC Pelican - Halo Nation4


    Last edited by Japith; June 24th, 2012 at 06:27 AM.
    With bravery and recognition that we are harbingers of our destiny and with a paragon of virtue.
    Reply With Quote  
     

  2.  
     

  3. #2  
    Moderator Moderator
    Join Date
    Apr 2007
    Location
    Washington State
    Posts
    8,473
    Looks like it's right out of a sci-fi movie.

    It's WWII jet-tech optimized with modern simulations, neat!


    Japith likes this.
    Meteorologist/Naturalist & Retired Soldier
    “The Holy Land is everywhere” Black Elk
    Reply With Quote  
     

  4. #3  
    Forum Bachelors Degree
    Join Date
    Apr 2011
    Location
    U.S.A
    Posts
    414
    bump
    would like to see comment
    With bravery and recognition that we are harbingers of our destiny and with a paragon of virtue.
    Reply With Quote  
     

  5. #4  
    Comet Dust Collector Moderator
    Join Date
    Mar 2011
    Location
    New Jersey, USA
    Posts
    2,847
    You appear to be the only one interested...
    Reply With Quote  
     

  6. #5  
    Time Lord
    Join Date
    Apr 2008
    Posts
    5,361
    Okay, you can do away with the heavy and fallible gears & motors that position each engine, by including a few flaps or vents on each jet. This way the jet's own thrust repositions it. It doesn't cost much weight or energy to lock a jet engine in place.

    Would be nice if control failure let the engines slip into hover & land configuration.
    A pong by any other name is still a pong. -williampinn
    Reply With Quote  
     

  7. #6  
    Forum Bachelors Degree
    Join Date
    Apr 2011
    Location
    U.S.A
    Posts
    414
    Quote Originally Posted by MeteorWayne View Post
    You appear to be the only one interested...
    Aircraft and engines fascinate me, I want to one day design and build one.
    With bravery and recognition that we are harbingers of our destiny and with a paragon of virtue.
    Reply With Quote  
     

  8. #7  
    Suspended
    Join Date
    Feb 2012
    Posts
    132
    I think that VTOL technology is quite difficult to perfect though. The harrier fighter jet is one of the few practical mass produced vehicles. They're still experiencing problems with the F35 VTOL. I saw a PBS Nova video on the competition between boeing and the skunkworks though. They showed the VTOL in operation - amazing and wonderful. I don't monitor the latest news for the aircraft industry though. Anyone know why they are experiencing problems?
    Reply With Quote  
     

  9. #8  
    Forum Bachelors Degree
    Join Date
    Apr 2011
    Location
    U.S.A
    Posts
    414
    Quote Originally Posted by ballyhoo View Post
    I think that VTOL technology is quite difficult to perfect though. The harrier fighter jet is one of the few practical mass produced vehicles. They're still experiencing problems with the F35 VTOL. I saw a PBS Nova video on the competition between boeing and the skunkworks though. They showed the VTOL in operation - amazing and wonderful. I don't monitor the latest news for the aircraft industry though. Anyone know why they are experiencing problems?
    The engines fuel consumption, amount and weight, these issues can bottleneck the aircraft's functionality.
    We need new fuel technology lighter and more efficient fuel before we can truly move forward in vtol technology
    With bravery and recognition that we are harbingers of our destiny and with a paragon of virtue.
    Reply With Quote  
     

  10. #9  
    Suspended
    Join Date
    Nov 2011
    Posts
    276
    Lol. Is that the pelican aircraft from the Halo videogame (in the photo)? Neat! Nice to have someone who seems to be knowledgeable in engineering is taking a look into these things.
    Japith likes this.
    Reply With Quote  
     

  11. #10  
    Forum Bachelors Degree
    Join Date
    Apr 2011
    Location
    U.S.A
    Posts
    414
    REVISIT | UPDATE:
    From the WATER AND TILT ROTORS THREAD
    So I was thinking about deconstructing this sci-fi drop ship in a video and figuring out how it all works
    The aircraft is a vtol and uses four tilt props on each corner of the vehicle like a quad tilt rotor, the rotary prop houses two engines, probobly pulse jet engines, one aiming down [vtol], and the other aiming behind for thrust. it is encased in a aerodynamic winglet thingy with two fins at the end of this rotary prop.

    So this thread is not about the craft, it is about how the tilt props can "tilt" the entire prop with engines fins, everything is I would assume at least around 10 tons. So what if there was water involved in the tilting? Water is incompressible right, and with that lets imagine 4 square containers (for visualization purposes) lets fill them all with water, now between the top and bottom parts is a long thick sheet of metal with a rotary between the 4 containers. Because there is equal amount of water on both sides and no leaking and all is completely pressurized, not other gasses basically a vacuum with water. ect. the sheet of steel should stay in the same place. now lets drain 1.0 amount of water on the left bottom volume, it now has a pocket of vacuum, now at the same time we drain the bottom left volume we drain 1.0 of water on the top right volume. so now the sheet of steel should be 5 degrees tilted.
    you should get the idea now.
    (Note: all of this is not a design, it is a simple physics concept that can possibly be used for tilt rotors.)

    I don't know if this would be effective in real life but seems like it would be. I am curious to know any machines that use this method for moving massive objects or heavy objects.

    edit: The scifi drop ship I was talking about.
    D77-TC Pelican - Halo Nation
    With bravery and recognition that we are harbingers of our destiny and with a paragon of virtue.
    Reply With Quote  
     

Similar Threads

  1. Replies: 19
    Last Post: March 9th, 2010, 07:02 PM
  2. Mysterious vehicle fault
    By Quantime in forum Electrical and Electronics
    Replies: 3
    Last Post: November 29th, 2008, 07:59 PM
  3. NEW ENGINE TYPE!!!!!
    By Chisco1389 in forum Mechanical, Structural and Chemical Engineering
    Replies: 0
    Last Post: May 17th, 2008, 09:33 PM
  4. Car Engine Tolerances?
    By TavisC in forum Electrical and Electronics
    Replies: 1
    Last Post: October 23rd, 2007, 07:28 PM
  5. Efficient Vehicle Design
    By arkain101 in forum Physics
    Replies: 2
    Last Post: November 14th, 2006, 05:59 PM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •