Quadrotor: potential application in Defense & Law Enforcement

Discussion in 'Defence & Strategic Issues' started by pmaitra, Oct 25, 2011.

  1. pmaitra

    pmaitra Moderator Moderator

    Joined:
    Mar 10, 2009
    Messages:
    31,663
    Likes Received:
    17,159
    Location:
    EST, USA
    Quadrotor and its potential application in Defense and Law Enforcement

    This could have been more appropriate in a 'Science and Technology' section, but there isn't one. This is a new concept in robotics where a Quadrotor (helicopter with 4 rotors) is used to ambulate and perform various tasks.

    I would like to invite members to debate on how these cuties can be used as/for:
    • drones
    • search and rescue
    • building bunkers and bases prior to deployment of troops
    • observation posts
    [​IMG]

    [​IMG]

    References:
    Quadrotor - Wikipedia, the free encyclopedia
    robots.net - Long-Term Swarms of MIT Quadrotor UAVshttps://www.grasp.upenn.edu/success_story/aggressive_maneuvers_autonomous_quadrotor_flight
    University of Pennsylvania demos Quadrotor gymnastics - As The Croft Flies
     
    Last edited: Oct 25, 2011
  2.  
  3. pmaitra

    pmaitra Moderator Moderator

    Joined:
    Mar 10, 2009
    Messages:
    31,663
    Likes Received:
    17,159
    Location:
    EST, USA
    Quadrotor: Assorted Videos

    Some videos from Universities











    There are many more videos and some really cool applications. I just did not want to post a whole plethora of them and just posted a few here. The ones I have chosen are not necessarily the best ones.
     
    Last edited by a moderator: May 10, 2015
    Kunal Biswas and W.G.Ewald like this.
  4. Rage

    Rage DFI TEAM Stars and Ambassadors

    Joined:
    Feb 23, 2009
    Messages:
    5,410
    Likes Received:
    971
    Potential applications are myriad. I'm just curious as to what happens, if one of the rotors fails during flight. Perhaps a quintrotor with four small tiltrotors (let's call 'em sub-rotors) mounted on a lower pitch axial-plane and a fifth, much larger (fixed) principal rotor, mounted on a higher pitch axial-plane would offer more stability without compromising pitch and roll control in the event of a single rotor failure. The torques or nacelle-angles of all the other sub-rotors could be adjusted, with the Principal rotor provided vertical lift to keep the rotor in continued, sub-optimal operation or get it back to safety. Perhaps even contra-rotating sub-propellers that reduce footprint and develop more power, with less torque for much larger load-carrying UCAV's. That would make the transmission and flight control systems of an autonomous drone considerably more complex, but I think that it would be justified for military applications.

    Come to think of it a septa-rotor, designed on the lines of a Fiano plane (below: points are rotor positions) mounted on a light, durable frame, with a larger, this time, co-planar main rotor, would offer much more stability for package-delivery or construction drones. Some kind of adjustable hydraulic ballast, coupled with the adjustable torques of the other propllers would allow for compensation, if one or two or even three co-linear rotors failed.

    [​IMG]
     
  5. agentperry

    agentperry Senior Member Senior Member

    Joined:
    Oct 24, 2010
    Messages:
    3,022
    Likes Received:
    678
    Location:
    delhi
    well when it comes to quadrotor a completely different picture emerges in my mind.

    instead of v-22 by bell. if we have a bigger fuselage and four rotors 2 attached to the front wings and two on rear extended wings( both wings have similar length). this heavy transport ship will be vtol/vstol with very high speed.( 4 rotors so speed should be high).

    good for short and medium distance missions
     
  6. A chauhan

    A chauhan "अहिंसा परमो धर्मः धर्म हिंसा तथैव च: l" Senior Member

    Joined:
    Oct 10, 2009
    Messages:
    4,928
    Likes Received:
    4,563
    Location:
    Raipur
    Such quadrotors are easy to take anywhere you go so each army unit should have at least 2-3 pieces of such rotors, they can use it whenever they need it.
     
  7. pmaitra

    pmaitra Moderator Moderator

    Joined:
    Mar 10, 2009
    Messages:
    31,663
    Likes Received:
    17,159
    Location:
    EST, USA
    If I read you correctly, you are suggesting something like these below, but rather a combination of two such aircraft, one placed behind the others and the fuselages fused together to form on large aircraft.

    Sounds like a great idea and someone should take it up.

    [​IMG]

    [​IMG]

    Mil-V-12.jpg CV-22-Osprey.jpg
     
  8. trackwhack

    trackwhack Tihar Jail Banned

    Joined:
    Jul 20, 2011
    Messages:
    3,757
    Likes Received:
    2,573
    As of now I have set myself a 2 year timeframe to build one of these from scrathc ( not as bad as DRDO but still 2 years!!! )

    Well, the difficult part is the brain, so heavy duty PIC programming lessons going on now. But quadcopters and hexacopters are beautiful and will someday replace spy sattellites altogether, when solar cells are made efficient enough to power these things for 24 - 36 hours.
     
    pmaitra likes this.
  9. Kunal Biswas

    Kunal Biswas Member of the Year 2011 Moderator

    Joined:
    May 26, 2010
    Messages:
    27,604
    Likes Received:
    28,417
    Location:
    BHARAT, INDIA, HINDUSTHAN

    [​IMG]

    [h=2]Chandigarh set to acquire UAV ‘Netra’:thumb:
    [/h]Source: Chandigarh set to acquire UAV ‘Netra’ - Indian Express


    ------------------------------------------------------------------
    Indian army develops 'Netra' UAV against terrorists

    From: Indian army develops 'Netra' UAV against terrorists -

    ----------------------------------------------------------------------------

    DRDO's UAVs, new weapons systems to fight Maoists

    More : DRDO’s UAVs, new weapons systems to fight Maoists - Thaindian News

    ----------------------------------------------------------------------------




    Enemy would never know who is watching him, can be carrier in a platoon size force..
     
    Last edited by a moderator: May 10, 2015
    pmaitra likes this.
  10. trackwhack

    trackwhack Tihar Jail Banned

    Joined:
    Jul 20, 2011
    Messages:
    3,757
    Likes Received:
    2,573
    Man, 35 lakhs is a bit much. I know its for the entire unit including the portable base surveillance station.

    A dragonflyer X8 which per my understanding is far more payload capable than the netra is priced at Approx $30K. This exclues the base station with the video receiver and display etc. I would have expected a system developed in India to be far more price competitive. However I am going by Netra's stated capabilities. Hopefully it has many other options that make it worth the $70K pricetag.

    If it can be made more price competitive this is a very marketable product.
     
  11. Kunal Biswas

    Kunal Biswas Member of the Year 2011 Moderator

    Joined:
    May 26, 2010
    Messages:
    27,604
    Likes Received:
    28,417
    Location:
    BHARAT, INDIA, HINDUSTHAN
    This include thermal sights, Smaller & Lighter once are more costly..

    Further smaller yet powerful motors, look at the heights 200m it can fly, Keeping wind speeds etc..

    Body is made of carbon fiber non mental, further Batt is small yet 1.5 KM Line of Sight (LOS) and has an endurance capacity of 30 minutes of battery charge.

    still compact..


    Deigned for Indian environment and harsh handling by Indian Armed forces..
     
    Last edited: Oct 25, 2011
    trackwhack likes this.
  12. trackwhack

    trackwhack Tihar Jail Banned

    Joined:
    Jul 20, 2011
    Messages:
    3,757
    Likes Received:
    2,573
    Kunal, dont get me wrong. I absolutely love the Netra project and have been following its development very closely.

    This kind of UAV has in my estimates marketing potential of several thousands. If we are able to use economies of scale and get the entire unit cost to below $30K it will be a significant market that we can capture. Hoping that we can bring the unit cost down in time.
     
    Kunal Biswas likes this.

Share This Page