Blowover / flip at speed

The boat flips over at speed — the turn fin or hull is generating too much lift and rolling it.

Try these in order

Make one change at a time and re-test — that's how you learn what your car likes.

1. 1
   Reduce turn fin angle, or add a V-groove to the fin's bottom edge

   The fin is acting as a lifting surface in the roll — de-tune it first.

2. 2
   Reduce negative strut angle / angle the prop thrust down slightly

   Forces the bow down, directly killing the lift that causes the flip.

3. 3
   Move weight (battery) forward

   Lowers the CG and resists the rotation that starts a blowover.

General RC tuning guidance — your chassis manual's own tuning chart is the final word for your specific car.