Criteria for a good wing-in-ground-effect (WIG) craft.
Irodov's criteria do not provide complete information.
Criteria for a good wing-in-ground-effect (WIG) craft.
Irodov's criteria do not provide complete information.
The advantages of wing-in-ground-effect amphibious craft, especially the type A, are based on commercial efficiency. A wing-in-ground-effect amphibious craft should be able to move on inexpensive automotive fuel and with the same payload as an airplane, but much faster and more efficiently than a ship. This will allow it to occupy the empty niche between relatively slow and cheap maritime transport and expensive air transport.
In order to have such qualities, the aerohydrodynamic layout of a wing-in-ground-effect amphibious craft must meet the following criteria:
- Lift on takeoff (takeoff speed)
- Lift in cruise (maximum takeoff weight)
- Aerodynamic lift to drag ration (flight efficiency in the wing-in-ground mode)
- Longitudinal moment in cruise
- Stability (pitch focus)
- Stability (height focus)
- Technological feasibility (production cost)
- Hydrodynamic resistance (gliding takeoff distance)
- Stability (dynamic)
These criteria were applied in the development of the aerohydrodynamic configuration of the DDL-1.
Other requirements that influence the success of commercial operation, such as cargo and passenger capacity, safety, maneuverability at low speeds in displacement mode, transportation division for transportation on a trailer, and others, were also taken into account.