One of the tier 3 or 4 research nodes (you should be able to research it with the current tech on that rocket) has struts. Get those next. They're basically space duct tape, that'll keep your ship from wobbling or engines bending apart like on that screenshot.
If you're in sandbox mode, look under the "structural" tab. Click the two parts you want to connect in sequence. Strutts can take a lot of stress before they break.
If you're in sandbox mode, look under the "structural" tab. Click the two parts you want to connect in sequence. Strutts can take a lot of stress before they break.
Last edited: