Serimus Bodikan said:

PCs usually have an easier way with tanks because they can usually pass next to it without engaging the vehicle. 

Amd blowing away the tracks is a pretty hard thing. You need to make a Called Shot, then penetrate and pray for Righteous Fury. The best way would be mines, but by some strange reason, FFG forgot these devices…

AtoMaki said:

Well there are mine rounds for what is it the grenade launcher, and you could also just use the entry for demo charges as mines.  But you really need anti-tank mines, anti-infantry mines wouldn't do much.

DrNo172000 said:

A little bit off-topic:

I also used demo charges profile for mines, although I feel that they could have expanded a little bit in the usage of explosives in the core book. For example, demo charges appear to have penetration 0 wich seems odd to me.

Also, it would have been interesting to have rules for several kind of triggers for the demo charges (proximity, contact, timer, etc.). Does anybody know how to manage this stuff in Only War?

whoseyes said:

You can always have them make the tech-use test to set the charge itself, then you can have them make a security check to set certain triggers like tripwires and the such.  I do think it mentions vaguely in the book that a demo charge can have a lot of different triggers, I could have imagined that though.

whoseyes said:

I think the best answer would be to keep the base Pen 0, but to have it increase by 2 x DoS on the Test to place the charge. Skilled use of demolitions should be rewarded over just tossing the charge at the target.

HappyDaze said:

I'm not sure pen is the way to go with improvised mines - a demo pack is not a shaped charge and so relies on pure destructive explosiveness to deal with targets.

Shaped charges (armour piercing that is) can be seen to have a lower damage in exchange for their armour penetrating ability. Compare the frag and krak missiles for example.

I'd need a book in front of me to concoct a proper, balanced anti-tank mine but i feel it would need to make use of special rules to either automatically damage the motive systems of the vehicle or something similarly cinematic and useful.

Kasatka said:

Explosives can be combined with other objects to make shaped charges.  As is the case in IED EFP (improvised explosive device, explosivley formed penetrators).  So perhaps instead of increasing PEN based on degrees of success you could have the person make a more difficult tech use test to assemble the device, given of course they have the proper materials on hand.

DrNo172000 said:

@DrNo172000

You mean something along these lines:

"I shall add this thick copper cone on it's tip over the demo charge. So when it explodes it shall form thin copper spray that increases the penetration of said explosion." or "I shall place this krak grenade inside sack full of ball bearings to make improvides anti-infantry trap."

Know your physics, watch your science channels, go through interwebs or be an combat engineer. Also remember if your players come across UXO (Unexploded ordnance) they might have some fun, if they're crazy enough, fiddling with it to make improvised bomb.