Hull shapes for Water Plane

Long floats, working as tail booms. So, the same potential issue with too much pitch stability.
I agree that S.65 looks awkward, especially in compare to your design. Anyway, I advice to bend the rear part of floats upwards.
regards
krzys

 

Or use Chance Vought F-8 Crusader wing idea.

 

No, just no...<shudder>....

 

Not in this layout, where wings are also the float struts...
krzys

 

Is a ground effect desirable on seaplane ?

 

Anything that gets the seaplane out of the water as quickly as possible is important. Too many seaplanes are poorly designed for waterborne performance. They need unnecessarily long takeoff distances.
JS

 

Not only is it desirable, it's inevitable.

 

I remember that landing Beaver on flat water, could be tricky because of difficult height assessment. You have to look to the side to during descent. I don't remember if there was anything bad about ground effect.
In my opinion, the wings, propellers should be kept far from the water. Fast and short take-off and landing. Slots, flaps, additional engine and prop. It can be electric although I would prefer some 3 cyl two stroke from jetski.

 

Let say Republic RC-3 Seabee - Wikipedia https://en.wikipedia.org/wiki/Republic_RC-3_Seabee on steroids :
carbon , prop , slots, thrust vector control ,turboprop , folding floats.

 

Trident TR-1 Trigull - Wikipedia https://en.wikipedia.org/wiki/Trident_TR-1_Trigull
Here are some improvements.I disagree with this landing gear.Old ones ar better or could be modified.

 

landing ...easy way to capotage with those foils.

 

Hi everyone,

I’m exploring the idea of designing a medium-sized cargo aircraft that can reliably take off and land on open water. Traditional hull and float shapes date back nearly a century, and while they work, they create significant drag once the craft is airborne. Ground-effect vehicles have been tested too, but their limitation to calm waters has kept them from scaling commercially.

My goal is to make something that can handle rougher seas (state 5–6) so it could operate on most days across the oceans. Has anyone here worked with hydrofoil or high-speed powerboat concepts that might improve stability and reduce drag during water takeoff and landing?

I’m aiming at a design in the ~5 ton range, with lift performance scaling from 25% at 23 kts to full lift at around 45 kts. I’ve been looking into parallels with how streaming platforms evolve — wrote a short piece on this connection here: Spotify Premium MOD APK Curious if similar lessons about efficiency and adaptability could apply in aviation design too.