Prototype
No.97 undertook two years of trials before going into production. Initial results suggested that only the front end needed further development. Initially the boiler pressure of the 2-8-0 was set at 200 lbf/in² (1.4 MPa) with 18-inch (457 mm) diameter cylinders. Tractive effort started out at 29,775 lbf (132.45 kN) but was increased substantially in the production engines by enlarging the cylinder diameter to 181⁄2 in (470 mm) and raising the steam pressure to 225 lbf/in² (1.55 MPa). The 81⁄2 in (216 mm) piston valves were enlarged to 10 in (254 mm).
Read more about this topic: GWR 2800 Class
Famous quotes containing the word prototype:
“The Ancient Mariner seizes the guest at the wedding feast and will not let go until he has told all his story: the prototype of the bore.”
—Mason Cooley (b. 1927)