### Understanding Rocket Stability Part 1 – Centre of Gravity

– Introduction – To understand the stability of a model rocket flight it is important to visualize the rocket moving through the air during its upward trajectory. After leaving the launch rod the rocket is essentially a free moving body in the air. The forces of wind, gravity and drag act upon the rocket affecting… Read more »

### Understanding Rocket Stability Part 2 – Centre of Pressure

– Introduction – Imagine if you will a long tube balanced in the centre or CG on a pivot. If we were to apply a steady air stream directly to the pivot point the tube would not rotate as there would be equal force applied to both sides of the tube. If we were then… Read more »

### Rocket Gliders part 2 – How do they work?

– Introduction – Recall, if you can, the first time you successfully flew a kite. The day was windy or, more probably, there was a steady breeze; your friend helped launch the kite whilst you ran a bit to get it up in the air. Suddenly it felt different, there was a steady pull on… Read more »

### Rocket Gliders part 1

– Introduction – A rocket glider (Figure 1) consists of a rocket motor attached to a glider such that the model climbs in a true rocket (ballistic) flight but converts after burn out to a glider. The burnt out motor stays with the glider. A rocket boost glider or boost glider (Figure 2) behaves in… Read more »

### Mathematics in Motion – Model Rocket Velocity

How fast does a model rocket go? This may be the second most asked question after witnessing a model rocket launch. Unlike a cannon ball shot from a cannon the velocity of the model rocket actually increases after it leaves the launch pad. In this lesson we will determine the maximum velocity of a model… Read more »