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.
Perhaps if you got a jack-plane and planed the walls off it would suffice.
The fore-plane or trying-plane is longer and larger than the jack-plane.
The most economical one is a jack-plane fitted with a smoothing-plane iron.
With the jack-plane face one side and one edge perfectly straight and true at right angles.
Then, taking the jack-plane, we planed off the projecting edges to the same level.
The outside of the hull can be finished up with a sharp knife and a jack-plane.
It was about nine o'clock in the forenoon, when I was busily employed with the jack-plane on one of the sweeps.
Ralph showed him the proper way to stand, and how to hold the jack-plane so as to get the best results.
In a smooth-plane 1⁄32 inch is enough, in a jack-plane ⅛ inch is often desirable.