1. Airframes and Their Characteristics
Unmanned Aerial Systems club

2. To Promote Safe Flying

3. Airframes and Characteristics!!
Wing Airfoils
Semi-symmetrical
Symmetrical
Flat bottom
Under-camber
Airframes
Flying wings
Deltas
High wing planes
Low wing planes

4. Semi-Symmetrical Airfoils
The mean camber line is above the chord
Primarily used on secondary trainer aircraft, sailplanes, and sport planes
Uneven airfoil is enough to generate lift, but not enough to sacrifice speed

5. Symmetrical Airfoils
The mean camber line is the same line as the chord
No lift generated from straight flight
Commonly used in aerobatic planes
3d aircraft
Pattern planes

6. Flat Bottom Airfoils
The mean camber line is much higher than the chord
Generates more lift than semi-symmetrical airfoils
Commonly used in trainer planes
Used to achieve slow, gentle flight characteristics

7. Under-Camber Airfoils
Both upper and lower cambers are higher than the chord
Generates the most lift of the four
Flies very slowly
Used in trainer planes and some older scale models

8. Flying Wings Designed to fly fast
Tip stalls easily (especially without wing tips)
Need airspeed to fly well

9. Delta Airframes Capable of slower flight than flying wings
Still tip stalls, but not as bad as wings
Possibility of adding rudder control

10. High Wing Planes Vs Low Wing Planes
Shorter take-off and landing distance
Inherently more stable
Arguably less aerobatic
Low Wing Planes
Longer take-off and landing distance
Less stable
Arguably more aerobatic