When the fins are bonded into the carbon fibre airframe, some extra carbon fibre will be laid up tip-to-tip to strengthen the fins. We wanted to practice doing this lay-up and make sure that the C-F fabric that we cut is the right shape, so we made a mockup of the fin can. A quick …
Martlet 1 has 3 stages, each stage having a motor section and a parachute section. Each parachute section holds two parachutes: a small spring pilot parachute that is deployed first, to allow the rocket to descend quickly so it doesn’t drift far in the wind, and a large parachute which is deployed near sea level, …
The Hedgehog flight computer is designed for tracking the 3-stages of the Martlet 1 rocket, when they are descending under parachute. The flight computer uses an Atmega 168, RadioMetrix 434MHz module and uBlox 6 GPS. Click here for more build photos.
The Martlet 1 rocket has fins that are made in two parts: the outside edge is machined aluminium to give a high temperature, sharp leading edge, which it will need at Mach 2. The inside of the fin is made of carbon fibre honeycomb, to be strong and light. The fin sections were first cut …
