Reply
 
Thread Tools Search this Thread
 
Old 16 September 2004, 10:38   #41
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
Jelly a very good idea but as you said cost is forbiding it. God idea nevertheless
Manos is offline   Reply With Quote
Old 16 September 2004, 12:28   #42
Member
 
tim griffin's Avatar
 
Country: UK - England
Town: Newport IoW
Boat name: Amean/Pronto/Rumbo
Make: Solent Rib Princess
Length: 7m +
Engine: 200hp Etec 260x 2
MMSI: lots of them
Join Date: Sep 2003
Posts: 1,861
still think both are good and still like the pole idea , question is how many ribs go out at night and need these a frames when a pole will do , in the Case of Manos and his charter ribs i can see the sense of a light pole with cross trees
for mounting vhf ariel and gps ariel as his boats are probably tucked up in bed when the sun goes down, also if you made the base plate strong enough you would get more hieght for towing wakeboarders and the like , Sports boats open type do not use them, alot i guess is the rugged go anywhere 4x4 appeal of ribs and how they look, both do the job just depends on what you want.
regards Tim
www.griffmarineservices.co.uk
__________________
Tim Griffin
RYA Freelance YMI power Powerboat and PWC instructor trainer vhf first aid sea survival Diesel engine radar and navigation instructor
tim griffin is offline   Reply With Quote
Old 16 September 2004, 12:57   #43
Member
 
Country: UK - England
Town: Hernebay
Boat name: Tsunami
Make: Hysucat
Length: 6m +
Engine: 2 x 70hp
Join Date: Jul 2004
Posts: 9
Why "A" frames

In S.Africa we did not refer to "A" frames as "A" frames but as "roll bars". This because most of our launching took place off the beach directly into the surf. This is a releatrively dangerous activety and the "roll - bar" was to protect the motors in the event of fliping the boat duting the launch. For this reason nav. lights where never mounted onto the a-frame.
__________________
Athol is offline   Reply With Quote
Old 16 September 2004, 13:12   #44
Member
 
Country: UK - England
Town: Havant
Boat name: Mrs Chips
Make: Scorpion
Length: 7m +
Engine: Optimax 225
Join Date: Sep 2004
Posts: 38
I deliberately did not spec an A frame on my Scorpion - the only advantage if you don't have a radar is that it keeps the all round white light high and at the stern - most other places and it ruins your night vision. They do however make good climbing frames and good to tie up to.
__________________
Marki is offline   Reply With Quote
Old 16 September 2004, 13:21   #45
Member
 
Louise's Avatar
 
Country: UK - England
Town: Reading
Make: None
Length: under 3m
Join Date: Jul 2003
Posts: 2,039
Quote:
Originally Posted by Marki
I deliberately did not spec an A frame on my Scorpion
What were your reasons for not wanting one, Mark?
Quote:
the only advantage if you don't have a radar is that it keeps the all round white light high and at the stern
And, as has been mentioned earlier, it gives you a foot or two more height for your VHF aerial, which has to be a good reason IMHO.
__________________
MUM POWER!
www.biboa.com
Scorpion RIB Group on Facebook
Louise is offline   Reply With Quote
Old 16 September 2004, 14:11   #46
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
Quote:
Originally Posted by Athol
For this reason nav. lights where never mounted onto the a-frame.
Now I understand Cheers

Tim you know how Greeks do things better than the Greeks. As we see it this year there is no need for A-frames (roll-bars) on our boats. No one uses them at night and not very many people requested to have skis or knee boards either. So the next boats we will get will be with just a ski pole doubling as a flag pole and having on the top one all-round white (anchor light) and two all round reds. The boats are equipped with torches and handheld spot lights any way. None has been used so far.
Manos is offline   Reply With Quote
Old 16 September 2004, 14:21   #47
Member
 
Country: UK - England
Town: Saltash, Cornwall
Make: Rib less:-(
Length: no boat
Join Date: Sep 2002
Posts: 693
Manos
I was meaning that with my current state of finances and the fact I've already got a stern A frame I couldn't justify the cost of having one built.
It would be a different matter if it was a new build and I seem to remeber these one for sale in the bits and peices section.
Jelly
__________________
Jelly is offline   Reply With Quote
Old 16 September 2004, 14:28   #48
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
No argument Jelly. I agreed with you. The cost for making an SS frame in Greece with some kind of bimini on it is a lot and I certainly will not do it for the hired RIBs.
Manos is offline   Reply With Quote
Old 16 September 2004, 15:56   #49
Member
 
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: 2,893
Yeah, and a couple of serious points as well in favour of A frames. If you've got radar you most certainly want it above your head... not good microwaving your brains (maybe not quite the right smilie but gives the right image!)

And the same applies to VHF. Weaker signal but still not healthy to stand directly in line with transmitting aerial.
__________________
Erin is offline   Reply With Quote
Old 16 September 2004, 18:18   #50
Member
 
Country: UK - England
Town: Havant
Boat name: Mrs Chips
Make: Scorpion
Length: 7m +
Engine: Optimax 225
Join Date: Sep 2004
Posts: 38
Quote:
Originally Posted by Louise
What were your reasons for not wanting one, Mark?
And, as has been mentioned earlier, it gives you a foot or two more height for your VHF aerial, which has to be a good reason IMHO.
I wanted a low profile - especially when on a trailer - I have a long aerial and have had no problems with range or reception.
__________________
Marki is offline   Reply With Quote
Old 16 September 2004, 18:36   #51
Member
 
Country: UK - N Ireland
Town: Comber
Boat name: Gemini
Make: Tornado
Length: 6m +
Engine: Mariner 150 Optimax
MMSI: ?
Join Date: Aug 2004
Posts: 22
One point nobody seems to have touched on so far...

A decent twin tube S/S A Frame will act to stiffen the whole rear of the hull, in a similar manner to a strut brace in a performance car. When we ordered our boat from Tornado, specifying that we wanted the strongest (but lightest)configuration possible it was suggested that we have one fitted, also the reason that the fuel tank is under the console and not under deck. Plus on a boat with a narrow transom it gives a perfect place to mount the aux engine and fenders and fishing rods etc etc

And they look pants without them!
Attached Images
  
__________________
Justwin is offline   Reply With Quote
Old 16 September 2004, 19:01   #52
Member
 
Country: UK - N Ireland
Town: Comber
Boat name: Gemini
Make: Tornado
Length: 6m +
Engine: Mariner 150 Optimax
MMSI: ?
Join Date: Aug 2004
Posts: 22
Sorry, wrong sized attachments...

Try these
Attached Thumbnails
Click image for larger version

Name:	ribraid_jpg.jpg
Views:	230
Size:	20.3 KB
ID:	8228   Click image for larger version

Name:	ribraid1_jpg.jpg
Views:	213
Size:	18.3 KB
ID:	8229  
__________________
Justwin is offline   Reply With Quote
Old 16 September 2004, 19:05   #53
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
Marki just out of interest as the 1st time I hear this. Are VHF waves dangerous?? Can you expand on it please?


Justwin it is logical and it will stiffen the rear of a boat. Can you clarify this one plese? also the reason that the fuel tank is under the console and not under deck don't get it.
Manos is offline   Reply With Quote
Old 16 September 2004, 19:10   #54
Member
 
Country: UK - N Ireland
Town: Comber
Boat name: Gemini
Make: Tornado
Length: 6m +
Engine: Mariner 150 Optimax
MMSI: ?
Join Date: Aug 2004
Posts: 22
No sorry, you're right. The fuel tank as you guessed has nothing to do with the stiffness of the rear of the boat, placing the fuel tank in the console (or anywhere else for that matter) as opposed to under the deck allows for stronger construction under deck.

Justin
__________________
Justwin is offline   Reply With Quote
Old 16 September 2004, 19:13   #55
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
(Quote) Marki just out of interest as the 1st time I hear this. Are VHF waves dangerous?? Can you expand on it please?




Only if the aerial pokes you in the eye
__________________
www.ribsters.net
chrisallse is offline   Reply With Quote
Old 16 September 2004, 19:24   #56
Member
 
Country: UK - England
Town: Havant
Boat name: Mrs Chips
Make: Scorpion
Length: 7m +
Engine: Optimax 225
Join Date: Sep 2004
Posts: 38
I have never been threatened by a vhf but assume if it is waving it's friendly
__________________
Marki is offline   Reply With Quote
Old 16 September 2004, 19:32   #57
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
Quote:
Originally Posted by chrisallse
Only if the aerial pokes you in the eye
Nice one
Manos is offline   Reply With Quote
Old 16 September 2004, 19:55   #58
Member
 
Richard B's Avatar
 
Country: UK - England
Town: Devon
Boat name: White Ice
Make: Ranieri
Length: 5m +
Engine: Suzuki 115hp
Join Date: Jul 2002
Posts: 5,015
Quote:
Originally Posted by Justwin
A decent twin tube S/S A Frame will act to stiffen the whole rear of the hull, in a similar manner to a strut brace in a performance car.
Err... if you need a welded stainless steel structure to stiffen your RIB, then boy-o-boy have you got problems! Firstly, the transom and hull design should be adequate in the first place, and secondly, if the rear section of the hull does flex, it will crack the stainless steel around the welds where it's most brittle, and subject any any other stressed areas of the stainless steel to a "work hardening" effect which will make it more brittle and vulnerable to sudden failure (like the Comet airliners).

Sorry, mate, but it sounds like Lawrence Lock did a sales job on you to sell you an A-frame!

Quote:
Originally Posted by Justwin
placing the fuel tank in the console (or anywhere else for that matter) as opposed to under the deck allows for stronger construction under deck
Why? This sounds like the salesman's words again! Decently designed box-section foam cored stringers should allow plenty of space for a tank and luggage space. Of course, if you splashed someone elses hull and just bodged the thing together with plywood inside, you might not feel confident about mounting a fuel tank inside...

All IMHO of course!
Richard B is offline   Reply With Quote
Old 16 September 2004, 19:59   #59
Member
 
Country: Other
Town: Oakley
Boat name: Zerstörer
Make: Ribcraft
Length: 5m +
Engine: Suzuki DF 140
MMSI: 235050131
Join Date: Jun 2003
Posts: 3,931
'A' Frames look well hard.

RIBs just don't look like RIB's without them
__________________
Biggles is offline   Reply With Quote
Old 16 September 2004, 20:15   #60
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
Richard you are right but it also does make sence this stiffening of the aft of the boat by putting an A-frame.

Quote:
Originally Posted by Justwin
placing the fuel tank in the console (or anywhere else for that matter) as opposed to under the deck allows for stronger construction under deck
I realy don't want to mention where I have heard that phrase before Justin. However, to Alan's delight I will give you a hint it was from the South side of the globe
THE SCORIPON (........for example - OK I know I'm going on and on about it but can't help it, is my new toy) has loads of space in the double bottoms and on top and on the side and everywhere and is bloody good and strong construction.
Manos 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




All times are GMT. The time now is 18:03.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.