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-rw-r--r--src/newgrf.cpp6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 3e4e95b5b..8c4fe36b0 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -1034,12 +1034,12 @@ static ChangeInfoResult AircraftVehicleChangeInfo(uint engine, int numinfo, int
avi->cost_factor = buf->ReadByte();
break;
- case PROP_AIRCRAFT_SPEED: // 0x0C Speed (1 unit is 8 mph, we translate to 1 unit is 1 km/h)
- avi->max_speed = (buf->ReadByte() * 129) / 10;
+ case PROP_AIRCRAFT_SPEED: // 0x0C Speed (1 unit is 8 mph, we translate to 1 unit is 1 km-ish/h)
+ avi->max_speed = (buf->ReadByte() * 128) / 10;
break;
case 0x0D: // Acceleration
- avi->acceleration = (buf->ReadByte() * 129) / 10;
+ avi->acceleration = (buf->ReadByte() * 128) / 10;
break;
case PROP_AIRCRAFT_RUNNING_COST_FACTOR: // 0x0E Running cost factor