set road vehicle speed

[BeSt-Com]

hi,
how can i set a higher speed than 80 mph?

wiki says use prop 15 instead of prob 8

prob 8 ist Speed in mph*3.2

if i set prob 8 to A0 my car drives 80 kmh/50 mph (A0hex = 160 dez / 3,2 = 50 -> ok)
if i set prob 8 to E0 my car drives 112 kmh/70 mph (E0hex = 224 dez/ 3,2 = 70 -> ok)


if i set prob 15 to E0 my car should drive 280 kmh/174 mph (E0hex = 224 dez/ 0,8 = 280) but it makes only 112.
How can i activate Prop 15?

(When setting property 15, always set property 08 as well... i did so)

[Maedhros]

You need to be using realistic acceleration in TTDPatch. If you're not, or you're using OpenTTD, prop 15 will have no effect.