ASW 19 B and Mainair Blade collide at crossing runways after a radio fault

A microlight pilot was seriously injured when his Mainair Blade and an ASW 19 B glider collided on intersecting runways; both were substantially damaged. The glider was on final for Runway 27S, the microlight for the undesignated, rarely-used Runway 05. Both made downwind calls, but an intermittent fault in the microlight's radio meant neither pilot heard the other. The ground operator called the microlight to abort but it was not received; the glider pilot, low and committed, touched down, and its right wing struck the microlight. The microlight pilot, new to the type and busy with the wind, had not looked for traffic on Runway 27.

1. Two aircraft converge to land: At Aboyne, a gliding field, an ASW 19 B was on final for Runway 27S while a Mainair Blade microlight approached the intersecting, undesignated Runway 05.
2. Microlight radio fault — no contact: Both pilots made downwind radio calls, but an intermittent fault in the microlight's radio meant neither heard the other.
3. Ground operator's abort call unheard: The A/G operator saw the conflict and called the microlight to abort, but the call was not received; he warned the glider, already low and committed.
4. Glider lands, sees nothing ahead: The glider pilot touched down on 27S and looked ahead but saw no traffic; the microlight pilot, task-focused, had not scanned for 27 traffic.
5. Microlight appears at 10 o'clock: The microlight appeared suddenly on the glider pilot's left; he applied full left rudder to try to avoid it.
6. Right wing strikes the microlight: The glider's right wing struck the microlight, seriously injuring its pilot; both aircraft were substantially damaged.