--- a/train_cmd.c	Mon Apr 11 20:54:25 2005 +0000
+++ b/train_cmd.c	Mon Apr 11 21:10:47 2005 +0000
@@ -231,7 +231,7 @@
 	if (v->u.rail.railtype != 2) force = min(force, mass * 10 * 200);
 
 	if (mode == AM_ACCEL) {
-		return (force - resistance) / (mass * 4);
+		return max((force - resistance) / (mass * 4), 2);
 	} else {
 		return min((-force - resistance) / (mass * 4), 10000 / (mass * 4));
 	}