If you should use a jack-plane to do the work of a fore-plane, have it ground more squarely across like the fore-plane.
But when you gum the small cardboard weight to its fore-plane, the action of the model is changed.
Carpenters, in using the fore-plane, draw it towards them instead of pushing it from them.
The fore-plane or trying-plane is longer and larger than the jack-plane.
The Wrights were, indeed, astonished at the celerity with which the glider responded to the fore-plane.