If it's up against the bulkhead and a fairly flat tank then it won't go anywhere.
It needs space to build momentum.
If it's in the middle of the van then it "hits" the bulkhead and may break through.
If it's already against it then it's just going break the tank in all probability.
Also my tank is full 2ft below me.
Now
either the tank rises vertically, or it goes forward under my feet.
It can't do both.
Momentum goes one way or another.
It's not possible to go upwards, have a little think, and then decide to go forwards and break through the steel bulkhead that it's already resting against.
Can't believe we're going through this argument all over again. :
