No, the nose of the floatplane wil rise even if you hold down elevator. Particularly right at idle when the propwash is minimal. Eventually when propwash becomes very strong the upward force of air against the down elevator will begin to counter the hydrodynamic pressure that's building against the bottoms of the floats although even with full down elevator the plane will still come up on the hump with a lot of power. It gets a little ugly after that, though, if you continue to apply down elevator. It's all about the hydrodynamic pressure on the floats. I learned this from my good friend Jay Frey who for decades was president of the float division at EDO.
Our boat has no more power than any other twin GB36 and less than many, and at the time the props had the same diameter and pitch as other GB36s with similar power and 4-bladed props. So I suspect that if one did the same "test" I did with another GB36 they'd have the same results.
I think it's inevitable, frankly. You move something faster through the water and you're going to generate more hydrodynamic pressure against the hull. And Newton says for every action there is a re-action.
The Gikumi that I was on a few weeks ago does exactly the same thing. This is the boat I've posted some shots of recently. We were idling along, a big herd of Pacific Whitesided dolphins came along, and the skipper started opening the throttle of the boat. I was standing on the bow and I felt the bow start to lift the moment the engine speed began to increase. And the Gikumi is the very definition of a displacement boat.
Our boat has no more power than any other twin GB36 and less than many, and at the time the props had the same diameter and pitch as other GB36s with similar power and 4-bladed props. So I suspect that if one did the same "test" I did with another GB36 they'd have the same results.
I think it's inevitable, frankly. You move something faster through the water and you're going to generate more hydrodynamic pressure against the hull. And Newton says for every action there is a re-action.
The Gikumi that I was on a few weeks ago does exactly the same thing. This is the boat I've posted some shots of recently. We were idling along, a big herd of Pacific Whitesided dolphins came along, and the skipper started opening the throttle of the boat. I was standing on the bow and I felt the bow start to lift the moment the engine speed began to increase. And the Gikumi is the very definition of a displacement boat.
Last edited: