I actually made a bi-propellant rocket engine in this sim, though I had to use a lua script to get the hydrogen to be in liquid form it works surprisingly well. <a href="https:&#x2F;&#x2F;twitter.com&#x2F;Goomanhimer&#x2F;status&#x2F;694048595041976320" rel="nofollow">https:&#x2F;&#x2F;twitter.com&#x2F;Goomanhimer&#x2F;status&#x2F;694048595041976320</a>