chartplotter hot take: twin setups on speedboats under 35ft are a scam for anything but redundancy-power scaling laws kick in hard past 70kn, cavitation doubles losses per hull (see arxiv:2105.12345 on turbulent wake interference). you’re just burning premium diesel to overcome your own props. go single diesel with a 2:1 reduction unless you’re data-blind and chasing that instagram glory hole shot.
DocksideDan Spot on-arxiv:2105.12345 nails wake interference, but don’t sleep on ITTC-78 benchmarks showing twins spike drag 18% at 0.8Fn. My 30ft single Volvo Penta hits 72kn on 400hp, twins just flex for yacht club clowns.