One of FAI basic requirements is that contestant be space at poles 10 meters (32.8â€™) apart on a line perpendicular to the wind/drift direction. Line shifting is difficult for the events with fixed equipment (F1B-C) and in most cases the majority of fliers can piggy back off those up wind. And since line positions are augmented by one or two poles each round, an upwind disadvantage can last for a few rounds.
Another disadvantage of a straight line is its length. I was told that the F1A flyoff round line at the â€™99 World Championships in Israel was 400 meters (1312â€™) long. Obviously the organizers were posted at one end and not in the middle.
So what can be done? For the stationary classes (F1B-C) we might consider using a circle of poles instead. A circle or a ring with a radius of 30 meters (98.4â€™) has eighteen 10-meters slots or thirty seven 5-meter slots, correspond to a line 590.6â€™ long. And a ring with a radius of 40 meters (131.2â€™) has twenty five 10-meter slots or fifty 5-meter slots, corresponding to a line 820.2â€™ long. It is assumed that most fliers would locate within the ring, without relocating during the contest.
Since there is almost always a wind/drift, poles could be assigned across the ring each round. For example, in an informal setup, using a four period cycle, a flier could be assigned to different quarters: north-east then south-west then north-west then south-east. And for a more formal setting for 16 poles, a four period cycle could correspond to poles, 1, 8, 4 and 12 for the first set of flier (2 or 4 per pole); to 2, 9, 5 and 13 for the second set of flier and so on.
A group of fliers at a pole might be flying upwind or updrift in a particular round. But the fliers behind them could be at most 60 meters (196â€™) down wind in the first example. (Compare this to a straight line, 590.6â€™ long.) On the next round, the two groups of flies would switch positions. A flying ring would be relocated if there is a major wind shift and models start flying off the field.
Flying in a ring increases the probability of mid air collisions a bit. But to be fair, in large contests we could have half the fliers launch, with a spectacular 15 models in the air, and occasionally there is a midair collision. F1C, rarely collide during their climb, but Iâ€™ve seen some involved in glide collisions. Seperate flying rings should be used for F1B and C, due to their weight and speed differences.
Would this idea be worth testing at one of our large contests? It definitely does not apply to F1A.
Last edited by Aram Schlosberg
on Sun Apr 11, 2010 8:18 am, edited 1 time in total.