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Old 02-03-2004, 06:15 PM
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Mike James
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Default G tolerances for designs

Howdy...

I used to have a book that had some examples for various airspeeds, showing typical G-forces imposed on airframes. I can't find the book now. So, the numbers below are rough guesses from my rusty memory.

I would guess that maximum G forces, including a 15% safety margin, for typical .60-size planes are approximately:

• Trainers or Scale 7 Gs
• Sport/Pattern/Jets 15 Gs
• Dynamic Soaring 40 Gs (!)
• Pylon Racers 30 Gs

Does anyone have more accurate numbers, or a formula that can give us better guidlines? Knowing these numbers would help any designer, enabling destructive testing, and also avoiding over-building components.

To all math geniuses who contribute, thanks.