Tail dragger float design
#1
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Tail dragger float design
I have been making floats, for several years, following the Chuck Cunninham design outlines.
I am now looking for 'rule of thumb' design parameters for tail dragger floats.
I am now looking for 'rule of thumb' design parameters for tail dragger floats.
#2
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RE: Tail dragger float design
Here's some pictures of a tail dragger float plane 9I had. It's an old Stuntwagon. It's pretty light and has big controls.
I took some regular flam floats and cut them off at the step. The step (end of short float) is positioned in the same position as normal about a half inch behind the CG. I used the left over part of one float to make the tail float. It was attached to the rudder with 4 popsicle sticks and some 2-56 bolts. I did add a little fin on the bottom to help steering. Don't know if I really needed it or not.
As soon as I hit power, the tail picked up and the plane was skimming along. The project was sort of non-eventful. It works good and I didn't notice and problem areas at all. It looks sort of cool, that's about all.
The last 2 pictures of the Magic were where I got the idea. I found them on the web somewhere several years back.
I took some regular flam floats and cut them off at the step. The step (end of short float) is positioned in the same position as normal about a half inch behind the CG. I used the left over part of one float to make the tail float. It was attached to the rudder with 4 popsicle sticks and some 2-56 bolts. I did add a little fin on the bottom to help steering. Don't know if I really needed it or not.
As soon as I hit power, the tail picked up and the plane was skimming along. The project was sort of non-eventful. It works good and I didn't notice and problem areas at all. It looks sort of cool, that's about all.
The last 2 pictures of the Magic were where I got the idea. I found them on the web somewhere several years back.
#3
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RE: Tail dragger float design
Thanks Ed for your posting. Your half a float solution appears to be in line with my best guess.
Front floats about half length normal floats - IE 37 - 40 % length
Front floats rear end to be at step location - IE 1/2" behind CG
Front floats tip to be about 4" ahead of prop
Rear float - just big enough to prevent the planes rear end from dragging in the water.
As these are for a WW1 Bipe I'll make them flat sided with a bit of a sweep front and rear. Similar to those on the Magic in your pics.
I'm still interested to see if anyone else has an input.
Front floats about half length normal floats - IE 37 - 40 % length
Front floats rear end to be at step location - IE 1/2" behind CG
Front floats tip to be about 4" ahead of prop
Rear float - just big enough to prevent the planes rear end from dragging in the water.
As these are for a WW1 Bipe I'll make them flat sided with a bit of a sweep front and rear. Similar to those on the Magic in your pics.
I'm still interested to see if anyone else has an input.
#4
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RE: Tail dragger float design
I Googled Images for "Sopwith on Floats"
There is a neat website at www.sopwith-aeroplane.com/CAD_Page.html
with all kinds of detail about float construction. Enough info for scale documentation.
There is a neat website at www.sopwith-aeroplane.com/CAD_Page.html
with all kinds of detail about float construction. Enough info for scale documentation.