Withington's translation states that the _Savannah_ measured 30.48 meters (100 feet) in length and 7.92 meters (26 feet) in beam and that she drew 3.66 meters (12 feet) in port and 4.27 meters (14 feet) loaded. Marestier's sketch (see fig. 3) of the outboard of the _Savannah_ shows a ship-rigged, flush-decked vessel with a small deckhouse forward of the mainmast and nearly abreast of the side paddle wheels. The stack is a little forward of the deckhouse and has an elbow at its top. Netting quarter-deck rail is shown and a bust figurehead is indicated. The position of the hawse pipe shown at the bow indicates the wheel shaft to have been at or about deck level. For structural reasons, and in compliance with the sketch, the wheel shaft would have been just above the deck. [Illustration: Figure 4.--Marestier's drawings of the _Savannah's_ engine (from plate 7 in Withington's translation of the Marestier report). The graphic dimensions do not precisely correspond to the scale of dimensions in Marestier's text, nor with other recorded measurements.] Marestier's drawings of the engine and paddle wheels[8] are reproduced in figure 4. The nonoscillating engine is inclined toward the paddle-wheel shaft. The connecting rod operates a crosshead to which is pivoted a pitman, or oscillating rod, that operates the paddle-wheel crankshaft. Alongside the steam cylinder is an air pump cylinder, also connected to the crosshead. The steam inlet and outlet pipes enter a valve chest on top of the steam cylinder, which is described as being 1.035 meters (3.4 feet) in diameter, and of 1.5 meters (4.9 feet) in stroke. The paddle wheels are shown as being of iron, with two fixed arms opposite one another on the hub. The other arms (four above and four below the fixed arms) are pivoted to the hub and held spread by chain stays. These eight blades fold, in pairs, to each of the fixed arms. The wheels are shown in elevation, with the upper pivoted arms folded on top of the fixed arms, and in cross section; the latter shows the shape of the buckets, hub, and outboard bearing of the shaft. The wheels are described as being 4.9 meters (16 feet) in diameter, while the buckets are 1.42 meters (4.65 feet) wide and 0.83 meters (2.72 feet) deep. The two outer corners of each bucket are snyed off at nearly 45°. The wheels are shown folded in the sketch; according to the description, they could be unshipped from the shaft and stowed on deck when desired. The method of removing the wheels from the shaft is not described, but from the drawings it seems probable that they were detached from the shaft by removing a lock bolt outboard and sliding the wheels off the square shaft. The hub seems adequate for this. Marestier states that this removal could be accomplished in 15 to 20 minutes; the logbook shows that it took 20 to 30 minutes to perform this operation at sea.