Seaplane version gross weight

[BravoGolf]

Is there an increase in the Patrol gross weight if built with the modifications for the floats? The seaplane version.

 

[DBeaulieu]

I assume you are asking about the spec for max allowable gross weight due to float modifications to the fuselage tubing? I would think not, but i would be interested in hearing the answer from Mark or Bob

 

[Hewko]

Isn't there a 5% increase in gross weight for any airplane, only when it is on floats.

 

[Bcone1381]

I recommend you call Bob or Mark. The Four Place has been documented with an increase MGTOW form 2500 to 2700 with floats and I believe Bob approves something similar (a 200 lb. increase that is) for the Patrol.

https://bearhawkaircraft.com/bearha...oats-and-skis-and-3x-stol-competition-winner/

 

[alaskabearhawk]

As I understand it the 4 place on wheels has a MGTOW of 2700 but must land at 2500. That is quite a bit of fuel to burn off. When on floats takeoff and landing can be at 2700. I suspect this has to do with float fitting attach points location and load distribution than any structural or material changes. Certainly a question for Bob if it is an issue.

 

[Steve W]

I was in touch with Bob a short while ago about increasing to 2200#. My Patrol will be on amphibs this spring. Blessings were given on the increase for standard category only, not utility. I had to look that up. The root wing skins are .032 as the plans show. All other skins are .025 except for the outer two wraps. I have doors/windows both sides and the airframe was built with the mods at the lower sides stations B to D.
Not sure south of the border, but there is a generalized rule of the mentioned increase of 5% rule in Canada. It was explained to me as being a stronger gear attachment allowing the increase over wheels.

 

[DBeaulieu]

Good info...

Steve - what amphibs are you planning on?

Cheers

 

[Steve W]

Rebuilt damaged set of Wip 2100A’s.

 

[Bear_It]

I was in touch with Bob a short while ago about increasing to 2200#. My Patrol will be on amphibs this spring. Blessings were given on the increase for standard category only, not utility. I had to look that up. The root wing skins are .032 as the plans show. All other skins are .025 except for the outer two wraps. I have doors/windows both sides and the airframe was built with the mods at the lower sides stations B to D.
Not sure south of the border, but there is a generalized rule of the mentioned increase of 5% rule in Canada. It was explained to me as being a stronger gear attachment allowing the increase over wheels.

Other than difference in G limits between utility and standard category, is there a difference in CG fore/aft limits with the GW increase to 2200?

 

[zkelley2]

Other than difference in G limits between utility and standard category, is there a difference in CG fore/aft limits with the GW increase to 2200?

There should not be.