suppose the beach shelved....IE a sandy cove with a very shallow underwater slope,continuing up to the point where it transitions to flat earth..a slow approach may allow the plane to slide all or part way up the beach.....a bit faster and it goes over the hump and slaps down on to the earth, (breaking the back of the fuselage in the process.
A tropical downpour would firm-up the beach and lubricate it and the earth.
STIRLING Please, not Sterling,that's UK currency, engines can be hot air engines.....once constructed, sheet aluminium could be salvaged, shaped and burnished sufficiently to make mirrors to heatthe "hot" end. there are lots of absorbent materials aboard, fibreglass insulation, upholstery,etc to cover the "cold "end...again, panelling,etc could be used to form a sun-shelter over the "cold" end and funnel the prevailing wind, because you'd water-soak the absorbent wadding which would chill by evaporation.