How do flying squirrels maximize the air-catching surface area of the patagium upon launching?

Answer

Spreading their limbs wide

When launching, the squirrel spreads its limbs wide, which stretches the patagium taut to maximize the surface area available to catch the wind.

How do flying squirrels maximize the air-catching surface area of the patagium upon launching?
animalmammalspeedglidesquirrel