RP-1 bumper style sounding rockets keeps getting its wings destroyed by aeordynamic stresses as it spins. What to do?

[Guest]

so, this has been quite annoying as it has ruined my RP-2/RP-1 P&LC run at the start with my now deleted save with a combined Bumper and Aerobee sounding rocket in which the aerobee always seemed to lose its wings due to aerodynamic stresses. But since that file is lost. I'll have to focus on my Bumper style sounding rocket instead. The problem I'm having is that the wings keep getting destroyed by aerodynamic stresses and I feel like trying to give them more mass-strenght multiplier wont do much. The picture below has the bumper inspired craft that I wanted to use. If the problem is the TWR, then Idk how to lower it at the moment. I am using the RD-100 engine for this craft

[king of nowhere]

since you problems specifically pertain a mod, you may have more chances finding help in the specific mod thread, rather than in general questions. I doubt many people are familiar enough with that mod to try and answer

[jimmymcgoochie]

There are a few things you can try:

• Increase the mass-strength slider on the fins, this makes them sturdier and less likely to break.
• Spin more slowly, a fast spin can actually destabilise the rocket or lead to parts being ripped off, especially fins. Use small solid rockets and/or small control surfaces to spin up at launch and leave the fins completely vertical so the spin doesn’t get too extreme at higher speeds.
• Don’t spin at all, you probably don’t need it on a rocket that size and you’d be better off with a guided rocket instead.
• Make the fins bigger. Those small fins won’t produce enough force to correct the drift from prograde before they fail from aero forces, larger fins might do the job. Look at the real Bumper/V-2 for guidance.

Here’s what I did in my most recent RP-1 game:

The camera is inside that stripy bit in the middle with the avionics above it; the top tank is jettisoned after engine shutdown and both camera and avionics are recovered together, though it would work just as well with the camera and avionics at the top, I only put them in the middle to save on tooling a nosecone.

It doesn’t actually need the fins as it’s fully guided and the A-4 (and RD-100 and possibly the American V-2 as well) provide enough control for this sort of design.