RCU Forums - View Single Post - Twice the scale, now how about the motor?
Thread: Twice the scale, now how about the motor?
View Single Post
Old 08-11-2013, 05:49 PM
  #24  
alfa156
Senior Member
 
alfa156's Avatar
 
Join Date: Sep 2004
Location: Woomera, AUSTRALIA
Posts: 148
Likes: 0
Received 0 Likes on 0 Posts
Default
Power = Drag x Velocity
Drag = Weight / (Lift Drag Ratio)

So if your aircraft size is doubled (wing span double = 4 times the original wing area), the weight could be 4 times the original (assuming same wing loading).
Assuming your Lift Drag ratio is the same, same cruise speed (same wing loading), then the power required will be 4 times.
alfa156 is offline  
Reply Like