පොල්කූර නැතිව අහස්කූර උඩයන්නෙ නැත්තෙ ඇයි

Avast0

Well-known member
  • Jun 22, 2023
    1,483
    1,575
    113
    පුකට ඉරට්ටක්වත් ගහගෙන බලපං
    අරක කෙලින් වෙයිද කියල එතකොටවත්
     
    Last edited:

    imhotep

    Well-known member
  • Mar 29, 2017
    14,876
    8
    35,492
    113
    Ethakota wawla sarungale..
    Any shape of Kite should obey the same aerodynamics. The forces on any kite are the same for all kites. The only difference is that the Lift Coefficient and the Drag Coefficient depends on the shape of the Kite and also the angle of attack between the wind and the kite.
    The Lift and the Drag of course will depend on the surface area of the kite. Both lift and drag acts through the Centre of Pressure (C.P)
     

    NEMISIS

    Well-known member
  • Nov 13, 2013
    11,410
    19,589
    113
    Colombo
    Stick is the easier solution. Sure the Fins will work. You need a minimum of three, but four could be better. Fin span is more important than the fin length. Shape is not that critical and Clipped-Delta, Trapezoidal & Tapered-swept all should be fine.

    I tried this, and worked flawlessly.

    Removed the stick and hot glued fines to the rocket. created two of them, one with bigger fins and one with bit smaller fins. Actually i created bigger fins first and then felt like, it is too heavy and won't fly at all, then created a second one with bit smaller fins.

    Results
    The one with bigger fins (First picture) : Flew on a extremely straight path(i was surprised), no wobble or whatsoever, but did not flew too high, i guess that is due to the weight.

    The one with smaller fins(Second and third picture) : Flew on straight path, had a bit of a wobble, exactly like a rocket with a stick.

    I have recorded this, but can't upload the video to EK directly.


    IMG_8263.jpeg
    IMG_8265.jpeg
    IMG_8264.jpeg
     

    imhotep

    Well-known member
  • Mar 29, 2017
    14,876
    8
    35,492
    113
    I tried this, and worked flawlessly.

    Removed the stick and hot glued fines to the rocket. created two of them, one with bigger fins and one with bit smaller fins. Actually i created bigger fins first and then felt like, it is too heavy and won't fly at all, then created a second one with bit smaller fins.

    Results
    The one with bigger fins (First picture) : Flew on a extremely straight path(i was surprised), no wobble or whatsoever, but did not flew too high, i guess that is due to the weight.

    The one with smaller fins(Second and third picture) : Flew on straight path, had a bit of a wobble, exactly like a rocket with a stick.

    I have recorded this, but can't upload the video to EK directly.


    View attachment 222129 View attachment 222131 View attachment 222130
    Nice work. :yes: (y)
     
    • Like
    Reactions: NEMISIS