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Anyone seen these??

B

Beaverpilot

Registered User
Manitoba Canada
Here are the float fittings that came on my cub. Anyone have pictures of something similar that is riggedIMG_9679.JPGIMG_9680.JPG


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I bought a plane with the same float fitting installed. Ended up machining a couple of parts to make them work. Not the best picture but all I have right now.
imagejpeg
 
85070E7F-B7B6-4C6D-98EC-CB93D84A792F.jpg

If if it is fuzzy I can email it to you
 

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Could you please get one close up. I’d like to see what you machined up.


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That looks to mirror the bolt on fittings.

I would bet if you got the drawings for the bolt on it would have the attachment depicted.
 
Gives a little more flexibility if your spreader bars are fixed.
968A9E79-FB76-46F8-971C-91E8B7846953.jpg16EB8CA2-88A3-4C1F-9091-3B06F4B26E54.jpg
 

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Cubus Maximus said:
ad1ab53dd6e3eb4dc6b208c6.jpg
Click to expand...

As rigid as you think your float installation is there are a lot of rolling stresses placed on the above fitting where it is welded to the longeron. In smooth water this is not a big concern. How many of you only fly on smooth water? When the water is rough there is a lot of continual back and forth stress placed on the weld of this fitting which could promote cracking. Unfortunately the edge of the weld where cracks would start are hidden under fabric. This should be a regular inspection location.

The fitting below is a better choice since the rolling motion and stresses are absorbed in the hinge bolt. The weld on fitting as shown in the Northland drawings is designed for a hinge bolt to attach the strut.

Wag2+2 said:
Gives a little more flexibility if your spreader bars are fixed.
View attachment 40398View attachment 40399
Click to expand...
 
skywagon8a said:
As rigid as you think your float installation is there are a lot of rolling stresses placed on the above fitting where it is welded to the longeron. In smooth water this is not a big concern. How many of you only fly on smooth water? When the water is rough there is a lot of continual back and forth stress placed on the weld of this fitting which could promote cracking. Unfortunately the edge of the weld where cracks would start are hidden under fabric. This should be a regular inspection location.

The fitting below is a better choice since the rolling motion and stresses are absorbed in the hinge bolt. The weld on fitting as shown in the Northland drawings is designed for a hinge bolt to attach the strut.
Click to expand...

And yet, those bolt on attach points with a couple tiny u clamps are strong enough......


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mike mcs repair said:
And yet, those bolt on attach points with a couple tiny u clamps are strong enough......
Click to expand...
True, yet they are still a hinged load relative to the fuselage longerons. Also remember that the primary load on these fittings is compression which is why those little clamps are sufficient..
 
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