Vol. 65, No. 1 spring 2020 42 T e 90-foot pinas ship
First of all, a comment about terminology is appropriate here. A small ship with an armament of no less than eighteen guns must be intended as a warship. T e term pinas does not seem appropriate here, because a pinas was an armed merchant ship. We should rather speak of a yacht or a frigate. T e drawings have been in the possession of Het Scheepvaartmuseum Amsterdam since June 16, 1921. T e term pinas does not appear on the drawings themselves, so it would have been given to them by G.C. Hooſt , who bought the collection.
14. Photograph of the corrected frames in the model.
15. Reconstruction in Delſt ship of the ‘Certer of a Ship, 85 feet long, 22 wide, depth 11, Bulwark 4 feet, with a single deck, built in the year 1668 on page 143 of Cornelis van Yk, De Nederlandsche Scheeps- Bouw-Konst Open Gestelt,(1697). Compare the shape and volume of the hull with the corrected version of the pinas in Figure 12.
T e shape of the shown vessel requires elaboration in three dimensions, so I did that. First of all, the frames of the body plan were compared with those in the side view. T ere is hardly any similarity between the two parts of the drawing. Although, for example, it is clearly visible in the side view that the front frame is mounted higher than the keel at the stern, it is set much too low in the body plan. It is diffi cult to determine which half represents the front and which the rear view, but if we assume that the port half is the forebody, the fi rst frame is drawn considerably too low. T e same problem occurs if we assume the converse. We decided to set aside the body plan and took the frames in the side view as a starting point for a model, because at least they are in the right location. T e Delſt ship ship design program is an excellent tool for this. In previous publications I have already referred to this free downloadable computer program, and also to the extraordinary skill of my cooperator, René Hendrickx. In less than no time, the frames were entered three-dimensionally into virtual space.
we see a separately drawn body plan, with which the shape of the vessel is therefore defi ned twice. Just as with the statenjacht drawing, both frame views are not executed in single lines, but doubled, apparently to indicate the frame thicknesses. Dimensions in feet and inches are applied to the drawing at tactical points.
T e result was visually shocking. (Figures 8-11) T e frame at # 20 (20 feet from the back) was so much too thin that an ugly dent was visible on the spot and in fact all the frames in the forebody (# 60, 70 and 80) showed the same problem with reference to the main frame. We let Delſt ship, which has a fairing function, perform the fairing of the lines. (Figure 12) To better visualize the situation, a model was made in which fi rst the frames were placed according to
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