Jordan Hodge – Team Ground Control

How would you go about specking a motor in order to move a certain rotating mass a distance in a specific amount of time? Our Case: 3 Meter Mesh Dish and Assembly: Aprx. 45 N (100lbs)

Dynamic Torque- The torque encountered by a system that is not only in motion, but accelerating. Static Torque- The torque produced at constant velocity (rest or running). Center of Mass- The mean location of all system masses. Moment of Inertia- A measure of an object's resistance to changes to its rotation. It is the intetia of a rotating body with respect to its rotation.

Torque=Fd F= Magnitude of Force (N)|d= Length or Magnitude of Lever arm (m) F=mam= mass (kg) | a= acceleration due to gravity (m/s 2 ) Moment of Inertia (J)=mr 2 m=mass (kg) | r= axis of rotation Center of Mass (Semicircle)=4r/3pi m=mass (kg) | r= axis of rotation

T Starting = K running T running K running = Running Torque Multiplier T o = [ 5250 x HP ] / N T o = Operating or running Torque ( ft-lbs ) | HP = Horsepower delivered by electric motor **Note: Values switch from N = Rotational velocity ( rpm)| metric to English Units 5250 = Constant converting horsepower to ft-lbs/minute and work/revolution to torque T = [ N x WR 2 ] / [ T a x 308 ] T = Time ( seconds )|N = Velocity at load (rpm ) T a = Average Torque During start ( ft-lbs ) WR 2 = Rotating Inertia (lbs-ft 3 )|W =Weight (lbs) R = Radius of Gyration (ft 2 )| 308 = Constant derived converting minutes to seconds, mass from weight, and radius to circumference

Torque dish Torque running =Fd F=ma F=(45kg)(9.81m/s 2 )= N Torque= ( N)(0.889m)= N-m

FNFN F Dx F Dy F Reacting

Counterweight Counter torque Better Bearings

Solid Works- Flow Works Scaling Down, measure, scale back up Buy torque measuring device

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