Reply
 
Thread Tools Search this Thread
 
Old 26 April 2011, 06:08   #1
Member
 
Country: Other
Town: Kwajalein, RMI.
Boat name: Golden Cowry
Make: Avon (Searider 6m)
Length: 6m +
Engine: 2xEvinrude Etec 90hp
Join Date: Mar 2005
Posts: 6
Filling Rib Tube with Nitrogen vs. Air

We're in a warm tropical (wet) location with intense tropical sun. We recently emptied the tube and re-filled with nitrogen. Like they do with tennis balls nowadays... It helps with stress on the tube as nitrogen is more dry and inert than compressed air and expands less in the hot sun.

However we still have issues with mold in the hypalon rubber; hoping the nitrogen might "starve" it. It's a little unsightly and we wonder if it's degrading the rubber...

Any thoughts on how to eliminate mold from rubber(hypalon)?

Golden Cowry,

https://profiles.google.com/101053888109376129346/about
__________________

__________________
davemon is offline   Reply With Quote
Old 26 April 2011, 08:33   #2
Member
 
Cookee's Avatar
 
Country: UK - England
Town: Salcombe, Devon, UK
Boat name: BananaShark
Make: BananaShark
Length: 10m +
Engine: 2xYanmar 260 diesels
Join Date: Mar 2003
Posts: 4,225
I think we need lots of photos of your location to make any further comment on your post!
__________________

__________________
Cookee
Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
Cookee is offline   Reply With Quote
Old 26 April 2011, 11:35   #3
Member
 
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
Quote:
Originally Posted by davemon View Post
However we still have issues with mold in the hypalon rubber; hoping the nitrogen might "starve" it. It's a little unsightly and we wonder if it's degrading the rubber...
The hypalon is the outside layer of the boat fabric. The inside is generally a layer of neoprene. You should be looking for a neoprene compatible fungicide.

If you're talking about mold growing on the outer layer (as you mentioned unsightly, and I doubt you're sticking your head in the tubes very often, especially when inflated), then what you use to fill the tubes won't make any difference, as the outside is exposed to air.


jky
__________________
jyasaki is offline   Reply With Quote
Old 26 April 2011, 13:44   #4
Member
 
Country: USA
Town: New Jersey
Make: Amphibian 249
Length: 7m +
Engine: twin 250hp Yamaha
Join Date: Jun 2010
Posts: 177
I was wondering about using nitrogen as well, my tubes inflate and deflate significantly over the course of a day. 35 deg at night, and possibly 85 deg during the day. How well does the nitrogen help?
__________________
95gstnj is offline   Reply With Quote
Old 26 April 2011, 14:23   #5
Member
 
chewy's Avatar
 
Country: UK - England
Town: Up Norf
Make: Avon SR4,Tremlett 23
Length: 4m +
Engine: Yam 55, Volvo 200
Join Date: Apr 2007
Posts: 5,217
I wouldn't do it, if someone vents the tube and gets a lung full they could end up dead, the person who filled the tube and didn't warn them could end up getting their arse felt.
__________________
chewy is offline   Reply With Quote
Old 26 April 2011, 15:24   #6
Member
 
Country: UK - England
Town: Farnborough
Boat name: Eleven
Make: Arrow
Length: 8m +
Engine: 557cu, 700hp
Join Date: Jul 2003
Posts: 1,255
Do you often inhale, fully, the air from your toobs? That is a very strange fetish!
__________________
Matt is offline   Reply With Quote
Old 26 April 2011, 15:34   #7
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 7,583
RIBase
Quote:
Originally Posted by chewy View Post
I wouldn't do it, if someone vents the tube and gets a lung full they could end up dead, the person who filled the tube and didn't warn them could end up getting their arse felt.
A lung full of N2 wouldn't kill you, at worst you'd feel a tad faint.
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5
Pikey Dave is offline   Reply With Quote
Old 26 April 2011, 16:20   #8
Member
 
Country: Norway
Make: AirshipRibs R8
Length: 8m +
Engine: Verado 350SCI
Join Date: Nov 2006
Posts: 19
I use helium. That increase the speed about 5 knot. The boat really fly now
__________________
patos is offline   Reply With Quote
Old 26 April 2011, 18:59   #9
Member
 
Country: Other
Town: Stanley, Falkland Is
Boat name: Seawolf
Make: Osprey Vipermax 5.8
Length: 5m +
Engine: Etec 150
Join Date: Mar 2006
Posts: 3,688
Quote:
Originally Posted by patos View Post
I use helium. That increase the speed about 5 knot. The boat really fly now
Plus if you breathe in the entire contents of the tubes you could do an awesome Donald Duck impression
__________________
A Boat is a hole in the water, surrounded by fibreglass, into which you throw money...

Sent from my Computer, using a keyboard and mouse
BogMonster is offline   Reply With Quote
Old 27 April 2011, 06:52   #10
Member
 
Country: Other
Town: Kwajalein, RMI.
Boat name: Golden Cowry
Make: Avon (Searider 6m)
Length: 6m +
Engine: 2xEvinrude Etec 90hp
Join Date: Mar 2005
Posts: 6
For Cookee,

http://www.kwajaleinscubaclub.com/
http://www.smdc.army.mil/rts.html
http://www.googleearthcoolplaces.com...rshall_islands

For jyasaki,

If you search/scan the forum way back there are many discussions about this topic but mostly in relation to which gas is more apt to "leak" out or expand. Although the inner surfaces are mostly impermeable, they aren't 100% impermeable, especially at the tube section seams. We see most of our mold problem around the seams... where there's a boundary between the rubber, the outside air and the fabric within. So, I'm not convinced by your suggestion. However, I did investigate a "moldi-cide" called Wet & Forget that gets accolades. I may try that.

For 95gstnj,

I think the Nitrogen helps quite a bit. My temperature range in the shade is 78-88F. But when the sun hits it here you could boil an egg on it. That's my main concern... I haven't gotten scientific about it - that would require me to refill with Air and make detailed measurements in varying conditions... but just using my pressure gauge and visually inspecting the bulge at the seams, I think it's an improvement. Besides, we aren't inventing this idea, many sporting goods/products are filled with nitrogen now, as well as auto tires, for this very reason. Hypalon is tough stuff, and Nitrogen isn't going to harm it.

For Chewy, Matt, Patos, Pikey Dave, Bog Monster,

We do have a tank of Helium next to the tank of Nitrogen - we save it for parties.
__________________

__________________
davemon is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 04:41.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.