John Wilkinson, Engines Nos. 3 & 4, Bradley, 1784

Sun and Planet Engines. (7 items).

239d. "Bradley Engines Nos. 3 & 4." Apr. 1784. 7 items.
Two engines, one with 48 inch cylinder, one with 42 inch cylinder, both with chain connections. Engines never built [?].

Section and plan of the engines and boilers; front and side views and plans of the working gear; plan of the 1st floor of engine no. 3; inside front view and section of boiler and chimney of engine no. 3; different beam designs for the 48 inch engine (engine no. 4). All the drawings are reverse copies.

Catalogue of Old Engines p. 56.

For John Wilkinson. There is no evidence that these two engines were ever built, as they do not not appear in the List of Engines made at Soho or in any of the lists of Wilkinson's engines drawn up because of his dispute with Boulton & Watt.