For usual locomotive practice

v � v_b � v₁ � 1.9 m³ kg^-1

L/D � 2 ; F₁/F � 7; F_b/F � 7; W/W_b � 3.5; W₁/W � 0.43; W/W_b � 1.5

(Dynamic pressure at throat)/(dynamic pressure at bell mouth(gas)) � 2.25

(Dynamic pressure at throat)/(dynamic pressure at blast pipe) � 0.185

Recovery in diffuser = 75% of dynamic pressure at throat

d₁/d_f � 2.65 (d_f = equivalent diameter of the 4 nozzles)

d_f/d₁ � 0.38 ; (F₀+F)/F � 8; d_b/d₁ � 1.07 (d_b = diameter of the bell mouth)

d_f/d_b � 0.35; d_b/d_f � 2.8;

(Height of mixing chamber/diameter of mixing chamber) � 2.5

(Chimney outlet diameter)/(Throat diameter) � 2; Diffuser included angle � 12�

(Draught at tuy�re plane)/(smokebox draught) � 1.4

Specific heat of steam � 0.47 cal kg^-1 K^-1; Specific heat of gas � 0.27 cal kg^-1 K^-1; Specific heat of steam/gas mixture � 0.34 cal kg^-1 K^-1

Steam-gas mixture temperature = 0.5(steam temp. + gas temp.)