It's because of how engines are clipped. With the latest version the flames produce some heat and are able to destroy exposed parts. It also applies to 2 engines that are too close to each other. If you want to launch it as is, you'll have to use the "No heat" cheat.
It's because of how engines are clipped. With the latest version the flames produce some heat and are able to destroy exposed parts. It also applies to 2 engines that are too close to each other. If you want to launch it as is, you'll have to use the "No heat" cheat.
Then how can you play with a rocket that has DLC parts? If I'm not mistaken it's been a few versions that the game automatically deletes non-DLC parts if the player didn't buy it.
Anyway, without the cheat I have no solution, sorry.