Can I Increase kinetic damage

In my experience things often clip through each other without explosives

The good news might be: it sure looks like from the videos I’ve seen that SimplePlanes 2 they’re no working on might have mechanics for tank guns! They show bombs and missiles as well as a tank (but not the tank firing).

@PlaneplaneplaneSSSSS sure that seems like a possible solution.
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But since those parts were never designed with that purpose in mind (firing a high speed projectile) I wouldn’t be at all surprised if the kinetic energy doesn’t quite match that of a typical tank gun. (Not to mention the fact parts tinkered too extreme can cause other funky issues). You've essentially attempted mimic a normal gun firing a projectile using gun powder, but it might not work exactly the same!

@Toinkove to propel bullets i just use stage separator and increase the force in the tinker panel

Yeah the physics of the game isn’t really set up to accommodate guns and such! I’m not even sure how you would propel the projectiles out of the gun barrel, we only have high velocity explosives not slower burning chemicals like guns would use…..

@YaMomzBox420 yes a tank gun is what I'm trying to build

Now I'm interested in what you're trying to do. Making a gun or something that's not exactly straightforward to build in this game?

The only way to do so is with cheats found in the flight menu. Increase Physical Damage beyond 1.00, and some magic should happen.