Duration Events
This page offers a short description of the NAR duration events.
Where appropriate, many of these events are divided by motor power.
For example, "A (engine) Streamer Duration" is a different event from "G (engine) Streamer Duration."
In general, duration models are not allowed to separate (recover in two or more pieces). This rule limits most duration models to being single staged.
Stay aloft the longest with one or more parachutes.
Stay aloft the longest with a single streamer.
Helicopter Duration
Stay aloft the longest with a model that uses autorotation as the sole recovery device.
Stay aloft the longest with the longest possible model. Points are awarded by a formula that takes into account both the length of the rocket and the time aloft.
Egg Lofting Duration
Stay aloft the longest while carrying a fresh hen's egg, and return it unbroken.
Stay aloft the longest while carrying two fresh hen's eggs, and return them unbroken.
Stay aloft the longest with a rocket-boosted glider. The model is allowed to separate and may be multi-staged, since only the glider portion is timed.
Stay aloft the longest with a rocket-boosted glider. Nothing is allowed to separate -- the entire model must boost vertically, but must return in a stable glide. This challenging event usually requires a model with clever moving parts.
Flex-Wing Boost/Glider Duration
Same as Boost/Glider, except the glider must use flexible wings.
Stay aloft for a predetermined timed duration. Precision Duration is actually three separate events where the goal is to be able to predict the performance of your model rocket.