Proper dimensions for floats? - RCCanada - Canada Radio Controlled Hobby Forum
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Old 05-08-2006, 09:05 PM   #1
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Proper dimensions for floats?

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Hello I am wondering what the length ratio is for length and width of floats to fuselage length. I remember someone posting that on here several months back, probably last summer some time but I didnt come up with anything when I searched. If my memory serves me right I am thinking it is something like 2/3 or 3/4 the length of the fuselage?? Does that sound right?

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Old 05-08-2006, 10:31 PM   #2
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Old 05-09-2006, 06:59 PM   #3
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Hi Steve. A basic rule of thumb that has always worked for me is
float length 70-80% fuse length[ back of prop to fin post]
float width 12% of length
floats spaced apart 25% wing span[ center line of floats]
step approx 50% of float length, may vary by manufacturer
2" min float in front of prop
2" plus top of float to prop tip [6and 12 pos]
step on the a/craft C.G.
Balance floats to bal. Airplane so when floats are removed, airplane bal. not affected.
I hope this helps you in some way.
Cheers, Dave.
P.S. depth of float 10% of length.
Dave Collis
Pitt Meadows B.C.
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Old 05-09-2006, 07:49 PM   #4
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Thanks for the information Dave. Yeah, that helps a lot. Now I know where to start. I am going to cut some out of foam for my giant scale trainer here pretty soon. I just bought a load of foam for the wing cores and will have enough left over for the floats as well.

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