4XA Engine Cluster Altitude
(no airstarts and no boosted darts allowed)23.1 Cluster Altitude (CA) is comprised of five events open to single staged model rockets.
23.2 The purpose of the competition is to achieve the highest altitude.
23.3 All motor cases are to be retained in the model. Following an official flight, a contestant must present his/her model as recovered to a contest official for verification of motor casing retention or the flight will be disqualified.
23.4 The person achieving the highest altitude is the winner.
23.5 The following five classes of Cluster Altitude are established:
Name |
Factor |
23.6 All motors of Cluster Altitude event models shall be ignited on or instantaneously after the model's first motion (i.e. "Simultaneous Ignition").
Partial cluster ignition shall be deemed a qualified flight unless disqualified for other safety reasons by the RSO. Unignited motors carried aloft shall be retained within the model.
23.7 Models that do not ignite all motors in flight will be considered official flights. An entry which fails to ignite all of its motors is considered a qualified flight unless it is unsafe (Rule 11.1), experiences a catastrophic failure (Rule 11.5), or the track is lost (Rule 14.9).