The South Pole - Roald Amundsen (ebook reader for laptop TXT) 📗

windows are double, of thick plate-glass. Inside the chart-house, besides the usual fittings for its use as such, there is a companion-way to the engine-room, and a hatch over the manhole to the main supply tank for oil-fuel. The opening in the deck has a hatch, made like the rest of the deck (in two thicknesses, with cork insulation between); the intention is to cut off the engine-room altogether, and remove the entrance of this companion during the drift in the ice through the Polar sea. The side houses are constructed of iron, and are not panelled; they are intended for w.c. and lamp-room. On the roof of the chart-house are the main steering-gear and the engine-room telegraph. On the port side, on the forward part of the after-deck, a Downton pump is fitted, which can either be worked by hand or by a small motor, which also serves to drive the sounding-machine, and is set up on the after-deck. Forward of the starboard side house is the spare rudder, securely lashed to deck and bulwarks. On each side of the chart-house a bridge leads to the fore-deck, with ways down to the workroom and fore-saloon. On the fore-deck, a little forward of the mainmast, we find the two ship’s pumps proper, constructed of wood. The suction-pipe is of wood, covered on the outside with lead, so as to ]prevent leakage through possible cracks in the wood; the valves are of leather, and the piston of wood, with a leather covering. The pump-action is the usual nickel action, that was formerly general on our ships, and is still widely used on smacks. These simple pumps have been shown by experience to work better than any others in severe cold. The fore-deck also has skylights over the fore-saloon, the main and fore hatches, and finally the capstan. This is of the ordinary horizontal type, from Pusnes Engineering Works; it is driven by the motor below, as already mentioned. The capstan can also be used as a winch, and it can be worked by hand-power.

The Fram carries six boats: one large decked boat (29 x 9 x 4 feet) — one of the two large boats carried on Nansen’s expedition —

placed between the mainmast and the foremast, over the skylight; three whale-boats (20 x 6 feet), and one large and one small pram; the two last are carried on davits as shown in the drawing. One of these whale-boats was left behind on the Ice Barrier, where it was buried in snow when the ship left. It was brought ashore that the wintering party might have a boat at their disposal after the Fram had sailed.

For warming the vessel it is intended to use only petroleum. For warming the laboratory (chart-house) there is an arrangement by which hot air from the galley is brought up through its forward wall.

The vessel was provided with iron chain plates bolted to the timbers above the ice-skin. The mizzenmast is new. There was a crack in the beam that forms the support for the mizzenmast; it was therefore strengthened with two heavy iron plates, secured by through-bolts. Two strong steel stanchions were also placed on each side of the engine, carried down to the frame-timbers. The old mizzenmast has been converted into a bowsprit and jib-boom in one piece. There are now standing gaffs on all three masts. The sail area is about 6,640

square feet.

All the cabins are insulated in the same way as before, though it has been found possible to simplify this somewhat. In general the insulation consists of:

1. In the cabins, against the ship’s side and under the upper deck, there is first a layer of cork, and over that a double panelling of wood with tarred felt between.

2. Above the orlop deck aft there is a layer of cork, and above this a floor of boards covered with linoleum.

3. Under the orlop deck forward there is wooden panelling, with linoleum over the deck.

Bulkheads abutting on parts of the ship that are not warmed consist of three thicknesses of boards or planks with various non-conducting materials, such as cork or felt, between them.

When the vessel was docked before leaving Horten, the zinc sheathing was removed, as already stated, since fears were entertained that it would be torn by the ice, and would then prevent the ice from slipping readily under the bottom during pressure. The vessel has two anchors, but the former port anchor has been replaced by a considerably heavier one (1 ton 1 1/2 hundredweight), with a correspondingly heavier chain-cable. This was done with a special view to the voyage round Cape Horn.

In order to trim the ship as much as possible by the stern, which was desirable on account of her carrying a weather helm, a number of heavy spare stores, such as the old port anchor and its cable, were stowed aft, and the extreme after-peak was filled with cement containing round pieces of iron punched out of plates.

Along the railing round the fore-deck strong netting has been placed to prevent the dogs falling overboard. For the upper deck a loose wooden grating has been made, so that the dogs shall not lie on the wet deck. Awnings are provided over the whole deck, with only the necessary openings for working the ship. In this way the dogs have been given dry and, as far as possible, cool quarters for the voyage through the tropics. It is proposed to use the ship’s spars as supports for a roof of boards, to be put up during the drift through the ice as a protection against falling masses of ice.

The Fram’s new engine is a direct reversible Marine-Polar-Motor, built by the Diesel Motor Co., of Stockholm. It is a Diesel engine, with four working and two air-pump cylinders, and develops normally at 280 revolutions per minute 180 effective horse-power, with a consumption of oil of about 7 3/4 ounces per effective horse-power per hour. With this comparatively small consumption, the Fram’s fuel capacity will carry her much farther than if she had a steam-engine, a consideration of great importance in her forthcoming long voyage in the Arctic Sea. With her oil capacity of about 90 tons, she will thus be able to go uninterruptedly for about 2,273 hours, or about 95 days. If we reckon her speed under engine power alone at 4 1/2

knots, she will be able to go about 10,000 nautical miles without replenishing her oil-supply. It is a fault in the new engine that its number of revolutions is very high, which necessitates the use of a propeller of small diameter (5 feet 9 inches), and thus of low efficiency in the existing conditions. This is the more marked on account of the unusual thickness of the Fram’s propeller-post, which masks the propeller to a great extent. The position of the engine will be seen in Fig. 1. The exhaust gases from the engine are sent up by a pipe through the after-saloon, through its skylight, and up to a large valve on the bridge; from this valve two horizontal pipes run along the after side of the bridge, one to each side: By means of the valve the gases can be diverted to one side or the other, according to the direction of the wind, Besides the usual auxiliary engines, the main engine drives a large centrifugal bilge-pump, an ordinary machine bilge-pump, and a fan for use in the tropics.

When the Fram left Christiania in the spring of 1910, after taking her cargo on board, she drew 17 feet forward and 19 feet 5 inches aft. This corresponds to a displacement (measured outside the ice-skin) of about 1,100 tons. The ice-skin was then 12 1/2 inches above the waterline amidships.