Fowler Flaps & Drooped Ailerons

STOL Magnificence.

Takeoff and landing performance is enhanced with a wing that has a high coefficient of lift. What this means is that slower speeds develop more lift, relative to the same wing without the lift enhancement of flaps & droop. Slower is better for performance and for safety.

The coefficient of lift can reach up to 2.6 with Fowler flaps. Drooped ailerons also help, but not as much.

Have you ever taken a good look at fowler flaps, in action, on the plane? I've curated some special photographs that show how I designed this feature into Chipper 2 (and now I'm putting them into an ultralight that I've offered for sale, as well.)

Fowler flaps @ 40 degrees, in flight (Chipper 2, design by James Wiebe)

Flaps 15, droop ailerons 5, on the ground. Aircraft design by James Wiebe

Takeoff roll, flaps 30, droop ailerons 5. Aircraft design by James Wiebe

Climbing out at flaps 30, aileron droop 3 degrees in a Chipper 2. Aircraft design by James Wiebe.

A thing of beauty! flaps 40 in a Chipper 2. Aircraft design by James Wiebe.

I'm in the process of rebuilding this ultralight, along with a new wing design similar to the Chipper 2 aerodynamics. This is the original design with full span ailerons.

Check my other blog posts for links to this Belite ultralight for sale.