- 38.1 Scope
- Flex-Wing Boost Glider Duration Competition comprises nine events open to any model rocket, one portion of which
returns to the ground in stable, gliding flight supported by flexible aerodynamic lifting surfaces which sustain
that portion against gravity. If the entry is staged, the gliding portion must be part of the uppermost stage, and
must not be deployed until that stage has burned out. The entry may separate into multiple pieces; only the gliding
portion is timed. The purpose of this competition is to achieve the longest flight duration time.
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- 38.2 Disqualification
- Any entry that descends with parachute and/or streamer recovery device(s) attached to the gliding portion of the
model shall be disqualified. However, other portions of an entry may deploy parachutes and/or streamers for recovery
purposes.
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- 38.3 Classes
- This competition is divided into classes based on the permissible total impulse of the motor(s). The following classes
of Flex-Wing Boost Glider Duration Competition are established:
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| Motor Class | Weighting Factor | Multi-Round Maximum |
| 1/8A | 19 | 30 sec |
| 1/4A | 18 | 45 sec |
| 1/2A | 17 | 90 sec |
| A | 18 | 120 sec |
| B | 19 | 180 sec |
| C | 20 | 240 sec |
| D | 22 | 270 sec |
| E | 23 | 300 sec |
| F | 25 | 300 sec |
| G | 26 | 300 sec
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