Too limited. How about branches that grow 18" in length, 4" in diameter uniform to the end [which is flat], and break off at the junction with the trunk so easily a child could do it so splitting for the stove is unnecessary. The branches would regrow fast enough that it would be unnecessary to harvest the tree itself, just break off the kindling branches and pile them in cord piles so they have time to dry before use. Or, design the trees so the branches fall naturally into cord piles without the necessity of reaching up to break off a branch and carrying it over to a pile.
This is a true American endevor. We should patent this right now.