Flugschule Herkules Kassel-Calden is a professional ultralight flight school located at Calden airport (ICAO: EDVK) in Northern Hesse, Germany. It offers year-round training subject to weather conditions, with flexible schedules tailored to individual needs. Services include ultralight pilot training, PPL to ultralight conversion, safety training, license reactivation, trial lessons, photo and sightseeing flights, cross-country flights, guided tours, and aircraft charter. The school also serves as a sales and technical base for Comco Ikarus ultralight aircraft. Pilot students receive comprehensive theoretical instruction including aviation law, navigation, meteorology, and flight radio communication license courses (BZF I and II). The facility is a professional flight school rather than a club and is reachable daily by phone from 09:00 to 20:00.