Ships of the navy, he considered, were too weak; they had plenty of timber, but were deficient in iron fastenings, brackets, and standards. Knees should be of iron, which was lighter, cheaper, and stronger than wood. The bottoms of all navy ships were too thin; the wales and inside stuff too thick. He particularly recommended diagonal braces from keelson to gun-deck clamps: six or eight pairs of these, secured with iron knees or straps, should prevent ships from straining as they did. He would reduce the tumble-home given to the topsides, and thus add to the strength both of hulls and masts; he would abolish quarter-galleries and give less rake to the sterns. Finally, he would design ships so as to require a minimum of compass timber; make no use of oak where he could substitute fir or elm with propriety; and have all timbers cut as nearly to the square as possible, to conserve strength.
His evidence, ending in a recommendation to the government to improve the status of the naval shipwrights, has been handed down as a remarkable exposition of sound knowledge and good sense. The proposals were beneficial, so far as they went, but they did not go far enough: the whole system on which the hull timbers were disposed was wrong. The continuous increase in the size of ships was gradually exposing their weakness. And though in the next century a more scientific disposition was to be adopted, for some years yet construction continued on the ancient lines.[29]
The great wars with France, which broke out in the year 1792, found us adding both to the length and to the scantlings of our new ships. Three years before, the Admiralty had ordered two 110-gun ships to be built, of 2332 tons burthen. One of them, the _Hibernia_, not finished till the year 1805, was made more than eleven feet longer than originally intended. Both of these ships were established with 32-pounder guns for their main deck.[30] The unwieldy 42-pounder, used on the lower decks of first and second-rate ships, was now displaced, in most ships, by the more rapidly worked 32-pounder. Lord Keppel had tried, also, to substitute 32-pounders for 24-pounders on the main deck of the _Victory_ and other ships in commission, so as to establish them generally; but they were found too heavy on trial. He replaced 6-pounders by 12-pounders, however, on the quarter-decks and forecastles. Carronades were now making their appearance. In excellence of material and honesty of workmanship our fleets were pre-eminent.