Landing Characteristics in Waves of Three Dynamic Models of Flying Boats
Abstract
Powered models of three different flying boats (one model with unusually long afterbody) were landed in oncoming waves of various heights and lengths. The resulting motions and accelerations were recorded to survey the effects of varying the trim at landing, the deceleration after landing, and the size of the waves. The data for landings with normal rates of deceleration indicated that the most severe motions and accelerations were likely to occur at some period of the landing run subsequent to the initial impact. Landings made at abnormally low trims led to unusually severe bounces during the landing run. The least severe landings occurred after a stall landing when the model was rapidly decelerated at about O.4g in a simulation of the proposed use of braking devices. The severity of the landings increased with wave height and was at a maximum when the wave length was of the order of from one and one-half to twice the over-all length of the model. The models with afterbodies of moderate length frequently bounced clear of tbe water into a stalled attitude at speeds below flying speed. The model with the long afterbody had less tendency to bounce from the waves and consequently showed less severe accelerations during the landing run than the models with moderate lengths of afterbody.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1952
- Accession Number
- ADA380563
Entities
People
- David R. Woodward
- James M. Benson
- Robert F. Havens
Organizations
- National Aeronautics and Space Administration