Having read the question about the GWS 10 -
the owner noted :
the cg was slightly aft the recommended point
the elevator trim was up
the plane flew fine.
question: is it tailheavy and how do you tell.
It seems he expected the elevator trim to be related to balance
it is not . on most of these models the setup is about 0-0-0 so some trim is expected
also these do not have light wingloadings the models are light the loadings are relatively high
so they do nose in at low speeds as they simply,
fall out of the air
It helps to have flown some of this stuff now on the market - it is quite different (the small foam electrics) as compared to powered models of years gone by


you can buy/ make an electric made from flat foam with 400 sq inchs area - weighing typically 16 oz ready to rip
or buy a model same size all built up in a very lightwight fashion rivaling the best old stick and tissue models from years gone by - and these weigh - 24 ozs
both fly very well but to expect the latter one to fly like the foam one is just dreamin.
the lighter one can have cg so far aft (50%) that some would say normal flight is impossible
in reality they fly quite well --slowly ,. and there are a lot of flyers now who are used to this kind of setup -and they try to apply it to heavier models -
but this aft cg applied to the 24 oz model won't work at all.
anyway-- cg issues are beat to death and unles you look at the specific model - all this proven theory stuff is meaningless to many flyers.