DOUBLE STALL TURN  Model pulls up into one-quarter (1/4) loop to a vertical track then performs a stall turn through 180 degrees.  Model then performs one-half (1/2) loop to a vertical track and performs another stall turn then recovers with another one-quarter (1/4) loop to level flight.  The length of the vertical segments is not a judging criteria.

Downgrades:

1. Model not flying straight and level at beginning and end of maneuver

2. Track of model does not become exactly vertical at points of turn.

3. Loop segments not round with same size and radius

4. Bottom of half loop not at same altitude as entry and finish

5. Model turns left or right during pull ups

6. Does not yaw tightly through 180 degrees

7. Return track more than one-half (1/2) wingspan from entry path

8. Return paths not parallel to entry path

9. Maneuver not finished at same altitude as entry

10. Vertical segments not equal