To foam or not to foam!  
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To foam or not to foam! - 6/12/2008 5:34:28 PM   
captjckirk



Posts: 78
Joined: 6/19/2002
From: West Des Moines, IA, USA
Status: offline 		I have a chance to get a set of Sig hollow glass floats at a very reasonal price, the ones that came with the non-fuel proof paint. I can re-paintno prablem, my question is-is there any reason to fill them with foam, the kind that comes in a can?
       Post #: 1

RE: To foam or not to foam! - 6/12/2008 6:36:42 PM   
evan-RCU



Posts: 2674
Joined: 2/4/2002
From: Charlotte, NC, USA
Status: offline 		Don't. The pressure of the foam expanding can burst the floats and if you get water in them the foam doesn't let you get it out.

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Revver #125, Pico Owners Club #3
R/C Anonymous. My name is Evan and I have not flown for 14 hours.

(in reply to captjckirk)
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RE: To foam or not to foam! - 6/12/2008 7:53:13 PM   
captjckirk



Posts: 78
Joined: 6/19/2002
From: West Des Moines, IA, USA
Status: offline 		Thanks, will use as is.

(in reply to evan-RCU)
       Post #: 3

RE: To foam or not to foam! - 6/15/2008 7:03:52 PM   
JimCasey



Posts: 1557
Joined: 3/4/2002
From: Cookeville, TN, USA
Status: offline 		I built a RC boat for my son once and foamed the inside. The foam swelled enough to cause noticeable distortion of the hull, but did not split it.

There are now "low expansion" versions of the canned foam.

Still, I agree with Evan. Those floats are robust enough and the foam will only add weight. Just be sure you cknow how to fab a drain plug if they ever leak.

_____________________________

Jim Casey/Seaplane Nerd
http://www.smilesandwags.com/Floats.html

(in reply to captjckirk)
       Post #: 4

RE: To foam or not to foam! - 6/16/2008 3:15:54 PM   
captjckirk



Posts: 78
Joined: 6/19/2002
From: West Des Moines, IA, USA
Status: offline 		Hi Jim, thanks for your in-put. Any suggestions on installing a drain plug would be welcome. Joe

(in reply to JimCasey)
       Post #: 5

RE: To foam or not to foam! - 6/19/2008 12:59:02 AM   
JimCasey



Posts: 1557
Joined: 3/4/2002
From: Cookeville, TN, USA
Status: offline 		One I have seen that worked well:
silver-Solder a #10-24 nut to a washer. Figure out where that will fit and drain best, and drill a 1/4" hole in the center of that area. Epoxy the nut/washer assembly centered over the hole. Then plug the hole in the nut with a small 10-24 machine screw and a rubber gasket.

_____________________________

Jim Casey/Seaplane Nerd
http://www.smilesandwags.com/Floats.html

(in reply to captjckirk)
       Post #: 6

RE: To foam or not to foam! - 6/19/2008 4:02:20 AM   
evan-RCU



Posts: 2674
Joined: 2/4/2002
From: Charlotte, NC, USA
Status: offline 		Drill a small hole in the top of the float and simply put some RTV over it. If you get water in the float peel it off drain then put RTV back over it.

_____________________________

Revver #125, Pico Owners Club #3
R/C Anonymous. My name is Evan and I have not flown for 14 hours.

(in reply to JimCasey)
       Post #: 7

RE: To foam or not to foam! - 6/19/2008 11:01:00 AM   
Fast Guy



Posts: 541
Joined: 11/24/2002
From: Pass Lake, ON, CANADA
Status: offline 		I just bought a couple drain plugs from an Aquacraft boat, drilled a couple holes and installed them.

Drain Plug

_____________________________

Drive to Stay Alive!!!!!

(in reply to evan-RCU)
       Post #: 8

RE: To foam or not to foam! - 6/26/2008 1:50:58 AM   
fairplane


 

Posts: 27
Joined: 10/28/2006
From: Prince Albert, SK, CANADA
Status: offline 		Hey-I have a set of great planes fiberglass floats and I was going to fill them with foam as they have a tendancy to crack. Once the water is in the wood soaks it up and they get heavy too- has anyone tried foam with success? I thought if I layered it in slow and in several steps this would work and I thought that should keep the water out? These floats seem to get a crack just about every time they are in the water.

(in reply to Fast Guy)
       Post #: 9

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