There is also the WW1 type of tie down which is basically a steel ring through which you drive 3 long spikes at angles to each other so that their pattern resembles the faces of an underground 3-sided pyramid (if you get my drift). The hooks on top of the spikes engage with the ring which you then tie your rope to. Only problem is you have 3 long spikes lying around in your aeroplane.
Don't bother with the 5 litre can size chunks of concrete. If the weight is easy to lift then your wonderplane will lift it easily if she's doing some unaccompanied flying. Then when your wonderplane is on its back the concrete chunks fall through the wing causing further damage. Been there, done that. Bl00dy useless now defunct flying club parked my beauty thus during a storm in '92. All their aeroplanes were safe though.
poetpilot Good idea about the silica gel, I'll have to get one of those.
Isn't it funny how picky you can get when it's YOUR aeroplane
