Can not create RP-1 propellant tanks. Sept 30, 2016 1:02:02 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by pokington on Sept 30, 2016 1:02:02 GMT You can make RP-1/LOx bipropellant engines, but RP-1 is not a selectable propellant for a propellant tank.