Corsair - 580mm wing

Introduction:

The purpose of this was to create a lightweight platform which could share the same batteries as my micro quads for the days when I take both to the field. The secondary purpose was to use it as a fpv platform.

Components ($30):

• 2x 3.7g servos with optional rod regulators
• Emax MT1804-2480kv
• Turnigy 10amp esc
• 4 channel receiver
• 5x4.5 carbon fiber prop
• Dollar tree foam board
• 2x push rods
• Colored packing tape
• bamboo skewer (spar)

Conclusion:

The design is a continual evolution of my other wings. This time, I'm making it thinner for less drag since it will be powered by a smaller motor. I've also significantly reduced the sweep angle as I like the flight characteristics of a wing with less sweep. The only advantage of a higher swept wing when it comes to RC models (which I have personally observed) is an increased roll rate along with being able to move the CG farther back. For me, the disadvantage is that I have to level out the wing more whenever I want to gain more altitude. For this wing I recycled the parts from an earlier micro wing with a KF airfoil. The total weight came to 98g without batteries.

The maiden went very smoothly. I didn't even need to trim the elevons and the only issue was the CG. With the reduced sweep, I found that the CG is much more far forward than I had hoped for. I was hoping to be able to use a 500mah 2s battery (27grams). After testing with various battery sizes, I found that I needed 60 grams at the leading edge to balance it for flight. The video uses 2 2s batteries for balance. It definitely still felt a tad bit tail heavy at times, so this may not be the ideal wing for me at this time. I can definitely hack it and extend the nose out further without affecting sweep, but would lose a lot of structural integrity. At that point, I may as well build a plane instead (which is what I may do next).