Wing and tail percentage - RCCanada - Canada Radio Controlled Hobby Forum
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Old 10-31-2007, 09:29 AM   #1
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Wing and tail percentage

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For proper flying what percentage of the main wing should the tail section be? ie: 72x10 main wing 720sq. inches. How many sq. inches should the stab be?
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Old 10-31-2007, 11:50 AM   #2
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20-25% depending on how much stability you want. 22% is quite common.

This works good for aerobatic planes with a tail moment around 2.5 times the nose moment.
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Old 10-31-2007, 03:17 PM   #3
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Thank you for the reply. I love to build my own creations or someone will give me a wing or something and I make it fly. The question is because I have a Sr. Falcon wing and a Beaver body which I will marry for flying off the water. I may put a 120 O.S. Max on it. If you have any more input please let me no. Bill
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Old 11-05-2007, 10:22 AM   #4
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TLAR. That looks about right! I've had successful fuse/tail/wing marriages on several float planes. Once I found a tail in the trash at my field (I still don't know what it was from or who crashed it) and spirited it away to be grafted on an Eagel II on floats. It looked pretty big, but flew great. The extra fin area doesn't hurt when on floats anyway. Be creative and have fun.
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Old 11-06-2007, 04:56 PM   #5
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Here is some quotes from a book I acquired years ago.

The horizontal & vertical stabalizers location is from 45% to 50 % of the wing span measured from the CG to the centre of the horizontal stabilizer.

The total area of the horizontal stab should be about 20% to 26% of wing total area. This area includes any portion which is covered by the fuselage.

The horizontal stab should be designed with an aspect ratio of 3 to 1. That,is the span should be 3 times the average chord length. When calculating the average chord onsider the elevator as part of the total horizontal stab.

From the book " Design & Build your own R/C Aircraft" by Kenneth Smith Edmonton Alberta Canada. 1984 Published by Robson House Hobby Supplies 222 Clarview Rd. Edmonton, Alberta, Canada T5A3Y5
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Old 11-06-2007, 05:38 PM   #6
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Look for books on the subject of model airplane design that where/are written by Andy Lennon. Good Canuck that he is and aerodynamisit too.

Air Age, the guys that publish Model Airplane news offer a magazine sized soft cover book by him on the subject. Also doa a search on Amazon or Chapters for TAB Books. He has published there to.
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