Pyroscaphe

After the first demonstration, it was said that the hull had opened up and the boiler was letting out steam, faults common in early steamboats.

A month later, on 19 August, the boat carried several passengers who signed a witness protocol for a successful journey.

This cylinder had a small diameter and a long stroke, and used two rack and pinion mechanisms with ratchet teeth to rotate the paddle wheel.

Elle lui proposa alors « le plus poétique voyage qui soit possible en France ».

Le 4 juin, ils embarquèrent sur un pyroscaphe à Saumur, descendirent la Loire par Angers et Saint-Nazaire (seize heures de voyage), et de là empruntèrent la patache du voiturier Bernus, une sorte de malle-poste brinquebalante pour arriver à Guérande, autant dire au bout du monde.

Scale model made by de Jouffroy in 1784 to show the French Science Academy the engine and paddle wheels used on the Pyroscaphe . The model is now in the National Maritime Museum in Paris. [ 1 ]