RE: What is cubic wing loading????
This is a formulae that was first (at least to my knowledge) proposed by a gentleman named Reynold's (no not the one who developed Reynold's number) who used to write for Model Builder. It is very good and a much better indicator of performance than just wing loading. For instance, if you try to fly a 1/2 a model with a wing loading of 18 oz./sq.; ft., you will have a lead sled that will probably be unflyable but, a 1/4 scale job with that wing loading will float forever. Wing volume loading is way of normalizing all sizes of models to have a good idea of how they will perform. If you do not believe this, just calculate the wing volume loading of as many planes as you can that you have flown and then compare the results. You will find that those with a 7 to 10 WVL will be the best performers regardless of actual size. You might also check out those that were dogs to fly to see where they fit in the evaluation.