Colisión del Karpf Baby con línea telefónica durante aterrizaje en campo cerca de Heuheim, Suiza

El 7 de junio de 1964, un Karpf-Flugzeugbau Karpf Baby experimentó un incidente cerca de Heuheim, Suiza. El piloto, con experiencia limitada, se vio obligado a seleccionar un sitio de aterrizaje rodeado de obstáculos tras perder altitud. Durante la aproximación de aterrizaje, el planeador colisionó con una línea telefónica, causando daños significativos en el ala derecha y lesiones menores al piloto. El piloto sufrió una conmoción cerebral y no pudo trabajar durante aproximadamente un mes. El informe confirmó que la colisión ocurrió durante un intento de aterrizaje de emergencia.

1. Aerotow cross-country: The pilot aerotowed from Hausen a/A and began local soaring, following other gliders southeast toward Baar.
2. Unnoticed height loss: While searching for lift near Baar, the pilot failed to notice in time that he had descended into sinking air and his altitude had reduced to about 400 m above ground.
3. Low experience: The pilot had limited gliding experience (about 13 hours in 78 flights), which contributed to being surprised by the rapid height loss and late decision-making.
4. Limited landing options: By the time the pilot decided to land, he was low over hilly terrain where the best field was unusable due to people haymaking, leaving only a marginal field surrounded by obstacles.
5. Forced landing decision: With no prospect of regaining height and unable to return to the home airfield, the pilot committed to a forced landing in a small valley field bordered by power and telephone lines and nearby houses.
6. Obstacle approach: During the final approach, the pilot pulled up to clear a high-voltage line, reducing airspeed so much that the glider became almost uncontrollable as he tried to avoid nearby houses and other obstacles.
7. Crash - minor injury: The glider struck a telephone line, the right wing caught on a pole and the left wingtip hit the ground, causing substantial wing damage, and the pilot, believing he was in a high-voltage line, jumped 3–4 m to the ground and sustained a concussion and shock.