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  1. hrishikesh

    STRUTS OR TENSION CABLES?

    Friends, Hi! It has been a long time since I logged in. I am almost nearing the end of the basic structural design of my ultralight aircraft. It is powered by a 21 horsepower Simonini engine with a 44'' propeller. our wing is 12 feet long(per side) and weighs about 25 kilograms together. The...
  2. hrishikesh

    thrust calculation

    I have a rotax 503 engine, with gearbox "B" type...max rpm available at propeller is 3000rpm. propeller diameter is 47''.how do I calculate the thrust?
  3. hrishikesh

    Angle of attack problem.

    I have selected a NACA 4412 wing profile for my ultralight aircraft having flying weight 200 kgs powered by a 21 hp simonini engine (Thrust = 80 kg). Wing area = 9.27 sq.m. How do I decide the angle of attack and coefficient of lift ?
  4. hrishikesh

    Does lift coefficient depend on airfoil shape ?

    I am using a NACA 4412 airfoil with an angle of attack 7 degrees and the lift coeff is 0.35. Suppose I replace it with any other NACA profile at same angle of attack. Will the value of lift coeff change ?
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