Reply
 
Thread Tools Search this Thread
 
Old 13 August 2004, 07:53   #11
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Pressure readings are all well and good - it's the feel of the tubes that count - you don't want them as tight as a drum - just firm will do - better too little air than too much!
__________________

__________________
codprawn is offline   Reply With Quote
Old 13 August 2004, 08:07   #12
Member
 
ribraff's Avatar
 
Country: UK - England
Town: Dartmouth
Length: 6m +
Join Date: Feb 2003
Posts: 1,210
I agree with Codprawn on this one, go by feel and experiment, if i'm in a rough sea i let some pressure out as this softens the impact of big waves on the tubes and makes for a smoother ride
__________________

__________________
Hypalon Tubes built in-house,retubing, repairs, Accessories
www.ribtube.co.uk
ribraff is offline   Reply With Quote
Old 13 August 2004, 10:37   #13
Member
 
Country: UK - Scotland
Town: Ardnamurchan
Make: Domar Corsair
Length: 4m +
Engine: Mercury 20HP
MMSI: What?
Join Date: Aug 2004
Posts: 215
thanks for the feedback guys,

So the answer is basicly, "Whatever you feel you want to put in it."

i think im running it at 2bar now, can probably press the sides in about 1CM with my thumb... May i just add that this is not a "normal" rubber boat with normal rubber, it think it's 4 layered with canvas reinforcement.

The valves are emm, "Bridgeport - Made in italy" and i cant find anything of them on internet either, however i think if something would blow, the valves would just jump out as they are only some sort of rubber/plastic, and when you inflate the boat you can see them slowly popping up out of their sockets and go into oval shape.

Since i live on the west coast of scotland, and dont really like getting wet, i only go out on nice-ish days. however i have already done approx 1M waves with it, and the nose tends to flop up when it hits a wave to hard, resulting in whatever was in the front, lying in the back in less than 1 second. (even tied down stuff) so i guess the harder, the better in my case, as there is no solid hull, the front tends to bounce when it hits larger waves, (the more speed, the less you notice it anyway )

Thank you
__________________
Mr-d is offline   Reply With Quote
Old 13 August 2004, 10:59   #14
Member
 
Country: UK - England
Town: nr Lymington
Boat name: JU-JU
Make: Halmatic PAC22
Length: 6m +
Engine: 140.5 Mermaid
Join Date: Sep 2003
Posts: 1,400
Quote:
Originally Posted by Mr-d
................i think im running it at 2bar now..........
I still think you should only using 2psi(pounds per square inch) not 2 Bar (29psi). Are you mixing your measurements

When we used to use this type of boat it paid to blow the keel tube up as much as possible but to leave the tubes a bit softer, made it faster and more comfortable


Des
__________________
Scary Des is offline   Reply With Quote
Old 13 August 2004, 13:17   #15
Member
 
Country: UK - Scotland
Town: Ardnamurchan
Make: Domar Corsair
Length: 4m +
Engine: Mercury 20HP
MMSI: What?
Join Date: Aug 2004
Posts: 215
If i only inflate it a tiny tiny bit, so that it is just round, the boat is all floppy and will literally fold round and go sideways like a snake upon each encounter of a wave. I dont know that it is actually 2 bar, but i think it is really close to it, i can attempt to measure it if i find a way to do so... i dont have a gauge that fits that size. i just went out (nice sunny day...calm water)i head out past the point.. and guess what, waves are approx 1M high, 3 people in the boat, me wearing my trousers and tshirt.... got absolutly soaked!, the nose does not fold round now, but there is quite a bit of pressure in the tubes, and it does not really jump upon hitting the waves. it just glides over them, and nose digs into next wave that is about to break on the front end (result, me soaking wet.)

Manos, imagine a long tube shaped balloon filled with water, and then imagine you attempting to push/steer it from the back... Now that image is what the boat is when it is just round, and going somewhere with some waves.

I know i shouldn't compare this to car/bicycle tyre pressure, A car does approx 40PSI and a bike does 50PSI, the tyres feel harder than the tubes, so through some Guestimation, id say im running close to 30PSI on the inflatable keel,and slightly less on the nose and sides (~25 psi) If only i had an adaptor to hook it up to a gauge.
__________________
Mr-d is offline   Reply With Quote
Old 13 August 2004, 13:19   #16
Member
 
Country: Greece
Town: Gloucetsreshire
Boat name: GATO DI MARE
Make: MAR.CO
Length: 9m +
Engine: Yamaha 200Vmax
MMSI: 235027678
Join Date: Sep 2002
Posts: 3,339
Send a message via MSN to Manos Send a message via Yahoo to Manos Send a message via Skype™ to Manos
Is this a wind up or what??
Manos is offline   Reply With Quote
Old 13 August 2004, 15:31   #17
Member
 
Country: Finland
Length: no boat
Join Date: Aug 2000
Posts: 113
Pressures

You are right. You shouldn't compare bicycle or car tyres to the tube of your boat.

Think about the diameter and construction of the car tyre compared to the boat tube. Boat tube feels very hard when pressure is near 0,3 bar. Pressure reliefe valves that are used in inflatable boat collars activates when pressure reach 1,75-3,25 PSI (different valves for different reliefe pressures).

Jari
__________________
Jari Hjerppe is offline   Reply With Quote
Old 13 August 2004, 18:25   #18
Member
 
Country: UK
Make: Ribcraft
Length: 4.8m
Engine: Mercury F60 EFI
Join Date: Dec 2003
Posts: 89
Quote:
Originally Posted by Mr-d
The valves are emm, "Bridgeport - Made in italy" and i cant find anything of them on internet either, however i think if something would blow, the valves would just jump out as they are only some sort of rubber/plastic, and when you inflate the boat you can see them slowly popping up out of their sockets and go into oval shape.
Thank you
Mr-d,

The fact that the valves are being deformed and popping away from the tubes would suggest that the boat is perhaps over-inflated?

Robert
__________________
Robert
Robert1 is offline   Reply With Quote
Old 13 August 2004, 18:44   #19
Member
 
Country: UK - England
Town: Cippenham
Boat name: Falcon1
Make: Falcon
Length: 6m +
Engine: 115hp Mariner Four S
MMSI: 235021077
Join Date: Jun 2003
Posts: 508
You sure it's not Mr Bean?
__________________
www.ribsters.net
chrisallse is offline   Reply With Quote
Old 13 August 2004, 19:31   #20
Member
 
Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,263
Mr-d, can I recommend the purchase of a correctly fitting pressure gauge...
__________________

__________________
Tim M 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 20:39.


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