Reply
 
Thread Tools Search this Thread
 
Old 30 October 2012, 03:52   #21
Member
 
Country: Thailand
Town: Phuket
Boat name: Neptune's Chariot
Make: Thai Hong
Length: 3m +
Engine: Yam Out F20hp Petrol
Join Date: Oct 2012
Posts: 22
Hi Chris... Yes I was since advised to "feather" the throttle in waves... as to the fluctuations in speed though ???

From now on I'm a very very fair weather sailor dont worry haha I quickly learnt a lot of valuable lessons that day.

it didnt feel though if the throttle wasn't fully open we would have not gone anywhere ..
__________________

__________________
Wesley is offline   Reply With Quote
Old 30 October 2012, 04:33   #22
RIBnet supporter
 
Erin's Avatar
 
Country: UK - Channel Islands
Town: A large rock
Boat name: La Frette
Make: Osprey Vipermax
Length: 6m +
Engine: 200 Suzzy
Join Date: May 2004
Posts: 2,830
Quote:
Originally Posted by Wesley
I soon noticed once the waves picked up a bit that the boat kept slowing down even if the throttle was fully open the boat would suddenly slow down and even in one case to an almost complete halt and the engine cut out (my friend and I had a sudden white look on our faces) but luckily the engine started again on first attempt, but as it would slow down it would then for some reason pick up speed as normal again, then a minute later, without any adjustment to the throttle, slow right down, I played around with adjusting the tilt of the engine and it some cases it seemed to make a difference but others not at all..
Sounds to me as though you might have a temperamental engine or an intermittent fuel problem that only shows when the boat is going up and down waves. There's no way the effect of the waves should cause it to cut out.

Sorry for the thread drift Great selection of photos btw - brave and mad all at the same time.
Erin is offline   Reply With Quote
Old 30 October 2012, 04:49   #23
Member
 
Country: Thailand
Town: Phuket
Boat name: Neptune's Chariot
Make: Thai Hong
Length: 3m +
Engine: Yam Out F20hp Petrol
Join Date: Oct 2012
Posts: 22
hmm Interesting... but I would have thought in this case you would hear the engine labor or cough and lose power, in my case the engine didnt slow down (the noise of the engine was consistent) it was the physical speed and would last for a while like someone was behind the boat holding onto a rope and slowing the boat down keeping it from moving forward if that makes sense. As if the engine was working over time just to keep us moving at 1 knot but then picking up speed again suddenly at which point I would close the throttle a bit to reduce the speed and the boat would come to an almost stand still so I'd open the throttle again but the boat wouldnt pick up uch speed at all... and kept going like this until we got back to calmer water then it was fine again.. ??

But I will check the fuel lines etc thanks for the advise
__________________
Wesley is offline   Reply With Quote
Old 30 October 2012, 05:02   #24
Member
 
Country: UK - England
Town: Gloucestershire
Boat name: Osprey
Make: Osprey Vipermax
Length: 5m +
Engine: E-tec 300 G2
MMSI: TBC
Join Date: Dec 2006
Posts: 4,013


Al,

Just to really throw the cat in amongst the pigeons and seeing from your pictures that you have helmed such a variety of boats and engines in various sea states would you share with us your thoughts on your favourite hulls & engines also any equipment you found did not perform as expected when it came to use in extreme conditions. ?
__________________
---------------------------------------------------
Chris Stevens

Born fiddler
Chris is offline   Reply With Quote
Old 30 October 2012, 08:37   #25
Member
 
Al Baker's Avatar
 
Country: Other
Length: no boat
Join Date: Oct 2012
Posts: 108
Hi Chris,
that's a tough question and I could spend all day answering it so here's a very brief outline. In my opinion there's no such thing as a multi purpose boat that works well in all situations. However my favorite choice of boats to drive in a direct action situation would be the 6m Avon sea rider and Halmatic Arctic 22. Best fitted out so the centre of gravity is low as possible and powered by the maximum allowed two stroke generated horsepower for the hull.
I tend to like boats which are difficult to break or have had all of their fittings smashed or broken off and replaced by hardier ones, homespun or aftermarket heavy duty.
My favorite ever boat was an old aluminium "task force" boat (featured in my album here) Most other people hated it because it seemed to have a mind of its own when driven in any kind of rough sea state. Not to mention being very ugly having been finished off with orange plastic barrels instead of an inflatable sponson. The barrels in my opinion outperformed inflatable sponson. They were quickly and easily replaced or fixed and it didn't make much difference if they were holed anyway.
Jet boats I find very useful when working in areas where props tend to get fouled such as fishing nets or for driving over ropes, barriers and booms. Ocean dynamics make some of the better jet boats I've driven.


Quote:
Originally Posted by Chris View Post


Al,

Just to really throw the cat in amongst the pigeons and seeing from your pictures that you have helmed such a variety of boats and engines in various sea states would you share with us your thoughts on your favourite hulls & engines also any equipment you found did not perform as expected when it came to use in extreme conditions. ?
__________________
Al Baker is offline   Reply With Quote
Old 30 October 2012, 21:20   #26
Member
 
Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,556
Sea Rider 8.4

Hi Al

about 12 years ago greenpeace were trialling an Avon 8.4 with a big Cat in it superb boat I think vey big central and heavy engine therefore a perfect central pivot poimt and a Jet boat to boot. Any idea why they binned it
__________________
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo
Rogue Wave is offline   Reply With Quote
Old 31 October 2012, 04:02   #27
Member
 
Country: UK - England
Length: no boat
Join Date: Mar 2012
Posts: 119
Hi Al


What the hell happened to the Avon 5.4 "at rest"?!
__________________
CornishAvon is offline   Reply With Quote
Old 31 October 2012, 04:34   #28
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 10,114
Quote:
Originally Posted by Al Baker View Post
...and powered by the maximum allowed two stroke generated horsepower for the hull.
theres a certain irony in that coming from an environmental organisation isn't there!
__________________
Poly is offline   Reply With Quote
Old 31 October 2012, 05:59   #29
Member
 
Al Baker's Avatar
 
Country: Other
Length: no boat
Join Date: Oct 2012
Posts: 108
Quote:
Originally Posted by Rogue Wave View Post
Hi Al

about 12 years ago greenpeace were trialling an Avon 8.4 with a big Cat in it superb boat I think vey big central and heavy engine therefore a perfect central pivot poimt and a Jet boat to boot. Any idea why they binned it

Hi Rogue Wave,
after all the trialling it was decided to go for 2 ocean Dynamic boats instead.
"The Billy G" pictured below was purchased for the US office and the "ocean witness" for the UK office.

__________________
Al Baker is offline   Reply With Quote
Old 31 October 2012, 06:08   #30
Member
 
Al Baker's Avatar
 
Country: Other
Length: no boat
Join Date: Oct 2012
Posts: 108
Quote:
Originally Posted by Poly View Post
theres a certain irony in that coming from an environmental organisation isn't there!
A very good question Poly and something I often grapple with.
We do run boats on Biodiesel (not a solution either by the way) and also under sail, however sometimes you just need to be able to get in and out of somewhere very fast. For that sort of work I prefer petrol 2 stroke. That is of course until something better comes along......hopefully if we all push together to make that happen then it'll be sooner rather than later.
I have experimented with using sailing dinghies in action by the way and found the cols regs come in very handy. We also use canoes when possible too.
:-) cheers, Al
__________________

__________________
Al Baker is offline   Reply With Quote
Reply

« Ribtec 585 | Top | Hello »
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 02:36.


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