Adjusting the flaperons.

This video shows them operating as ailerons. I move the control stick side to side.

Note that at max deflection, the control surface moves above neutral position more than it moves below neutral position. This is the principle of differential ailerons. It helps reduce adverse yaw.

The first comment to this toot will be a video showing the motion of the flaperons as camber changing flaps.

#AvGeek #Aviation #ElectricAircraft #Homebuilt #Glider #DIY #EAA #Technology #Wing #Aileron #Flap #Flaperon

Installing the flaperon on the glider's wing.

https://en.wikipedia.org/wiki/Flaperon

It's a full-span flaperon, in two halves. Each half is almost 12 feet long.

Each flaperon half has 8 hinges made of a pintle/gudgeon pair. (1st photo)

https://en.wikipedia.org/wiki/Pintle

https://en.wikipedia.org/wiki/Gudgeon

When installing the outer flaperon half, I also have to engage two sets of pin/sockets that ensure the two halves move as one unit. (2nd photo) (Each flaperon half is driven by its own flight control linkage, not shown here.)

One of the 8 hinges on each flaperon half also serves as a retainer that handles side loads. (3rd and 4th photos.)

The flaperon halves are intentionally not very stiff longitudinally so that they flex with the wing, but they are much stiffer radially to resist deformation because they are driven at only one point by the flight control linkage. This feature is fairly easy to achieve in composite fabrication because you can orient the fabric fibers in certain directions. In this case we used Kevlar, not carbon or fiberglass.)

#AvGeek #Aviation #ElectricAircraft #Homebuilt #Glider #DIY #EAA #Wing #Flaperon #Kevlar

Glider flight controls. How does the control stick make the ailerons work? (And what about those flaperons?)

The video is in three sections. (Sorry about the abrupt jump cut edits.) First section shows the control stick moved side-to-side to move the ailerons. That motion is carried by various push-pull tubes and bellcranks...aft of the landing gear. In the second section of the video we see the lever for one wing goes up while the other goes down.

But I have flaperons, not ailerons. The third section shows the result of moving the flap lever...the same wing control levers now move up together, or down together.

The mechanical mixer allows two different control inputs (control stick sideways motion, and flap lever) to be combined into one final motion.

https://en.wikipedia.org/wiki/Flaperon

https://en.wikipedia.org/wiki/Bellcrank

This completes what was started here:
https://universeodon.com/@KrajciTom/114846515361228698

#AvGeek #Aviation #ElectricAircraft #ExperimentalAviation #Homebuilt #Glider #DIY #Control #Flaps #Flaperon

Four flaperon halves have been painted. (And the spinner and wingtip wheels...red chair in the background of 2nd photo)

#avgeek #aviation #ElectricAircraft #ExperimentalAviation #homebuilt
#Glider #DIY #Wing #Flaperon #Primer #Paint #Sand