We fly commercial low-power kit motors from a farm field north-west of Tampere between April and October, and we write down every flight, including the ones that ended in a tree, so the next season starts from numbers instead of from memory.

Emberfield Rocketry is a small club, fourteen members at the last count, flying model rockets from a stubble field about twenty kilometres north-west of Tampere. We started in the spring of 2017 with four people, two of them teachers, and a cardboard kit each. Everything we fly is low power: commercial factory-made motors in the A to C range, paper and balsa and plastic airframes, parachutes and streamers for recovery. Nobody in the club makes motors or propellant, nobody wants to, and the whole point of the hobby for us is the part that happens before the button, which is measurement, assembly and checking.

We hold nine or ten launch days a season, from the middle of April when the field has dried out to some time in October when it gets too wet to park on. The farmer who owns the ground lets us use it after harvest and before the autumn ploughing, and the arrangement survives because we leave the field exactly as we found it and stop flying when he asks. Every launch day runs to the same written range procedure: a marked pad area, a measured spectator line, one person acting as range officer with the only say on when the range is open, and a card filled in for every flight before anyone walks out to recover.

This site is our log book put somewhere we can all read it. It is written by whoever ran the day, usually the same evening, and the numbers are the ones off the cards rather than the ones we remember. It is not a how-to and it is not instruction. Where we describe what we did, we describe it as a club record, and where a flight went wrong we leave the details in, because the failures are where the useful information is. We do not name manufacturers, shops, the farm, or individual members. Anyone reading this who flies elsewhere should work from their own national code and their own field rather than from our numbers, because the rules that matter are the ones written for the ground you are standing on.