 |
19 February 2021, 11:35
|
#1
|
Member
Country: UK - England
Town: Shropshire
Length: 4m +
Join Date: Jan 2021
Posts: 6
|
Putting an aluminium floored SIB on a trailer
I was advised not to leave a larger SIB on a trailer or launch trolley as it may sag over time.
However, I am aware that some people tow their SIBs and some leave it on launch trolleys for extended periods.
If you are one of these people, have you seen any ill effects to the SIB, or have you modified your trailer/trolley to increase or improve the surface area that supports the SIB?
I have purchased a launch trolley and am looking at improving the support it currently offers by modifying it with a couple of large webbing slings.
Dave
__________________
__________________
|
|
|
19 February 2021, 11:45
|
#2
|
Member
Country: UK - Scotland
Town: Stirling
Boat name: The Gurnard
Make: Quicksilver
Length: 4m +
Engine: mariner 25hp 2s
Join Date: Jul 2013
Posts: 1,387
|
Quote:
Originally Posted by nelvar
I was advised not to leave a larger SIB on a trailer or launch trolley as it may sag over time.
Dave
|
Not sure who told you that but my heavy Quicksilver 4.3m SIB sat on its trailer 365 days per year and never sagged after sitting 16 years. The secret is to support the length of floor of the boat with the trailer bunks just where it meets the tubes. That way there is no weight on the tubes so it wont deform if pressure goes down in the tubes.
I have no experience of leaving it long term on a launch trolley. .. so perhaps that is what they really mean to say.. bunked trailer is fine though..
__________________
__________________
|
|
|
19 February 2021, 14:31
|
#3
|
Member
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 6,531
|
Surface area support and plenty of it
__________________
|
|
|
19 February 2021, 16:08
|
#4
|
Member
Country: UK - England
Town: Surrey
Boat name: Fandango
Make: Ballistic
Length: 6m +
Engine: Yamaha 150
MMSI: 232028101
Join Date: Sep 2015
Posts: 143
|
Quote:
Originally Posted by nelvar
I was advised not to leave a larger SIB on a trailer or launch trolley as it may sag over time.
However, I am aware that some people tow their SIBs and some leave it on launch trolleys for extended periods.
If you are one of these people, have you seen any ill effects to the SIB, or have you modified your trailer/trolley to increase or improve the surface area that supports the SIB?
I have purchased a launch trolley and am looking at improving the support it currently offers by modifying it with a couple of large webbing slings.
Dave
|
My Futura spent all it's life on a SIB trailer, no evidence of problems.
Get an appropriate trailer which supports the tubes and the transom.
__________________
|
|
|
21 February 2021, 11:12
|
#5
|
Member
Country: USA
Town: California
Make: zodiac futura
Length: 4m +
Join Date: May 2018
Posts: 237
|
Futura mkll with 60hp on it. 3years during summer months it’s on the trailer with no problem. And I check. Transom rests on the bunks as does the aluminum floor. I just let the keel air out so fabric goes slack and let’s bunks contact floor. Also I keep air in tubes that support transom at least 2 psi. It sleeps in my garage when not in use.
__________________
|
|
|
21 February 2021, 12:17
|
#6
|
Member
Country: UK - England
Town: Up North and right a bit
Make: XS500/Merc340/Bic245
Length: 5m +
Engine: Mar 60/20/3.5/Hon2.3
Join Date: Sep 2013
Posts: 561
|
Nelvar,
Tried to reply to your pm but strangely couldn't attach any pics, so putting my reply here on the forum. Hope you don't mind, here goes;
Hi Nelvar,
The trolley's (we have a large and small) have been used and modified a few times over the years to suit different boats. We fitted bunks for good support as our sibs sat on these inflated March to November and the trollies only dismantled and folded for storage over winter. The bunks were all made from 38 x 63mm CLS timber and 2400mm long covered with pipe insulation. Tubes always reduced to around half pressure for storage. We also used a cheap hand dolly for ease of hauling by hand over grass, dunes and sand.
The first sib, a Zodiac was aluminium floor so the outer bunks were positioned under the outer edges of the floor next to tubes, and keel fully deflated. Four bunks probably overkill as in reality two would suffice.
For the Aerotec the bunks went under the tubes and the air floor just hung between.
The last incarnation was for a T38. For this the inner bunks ditched and boat supported with single bunks under tubes hard up to floor edges.
We also, at one point, modded the smaller trolley with short bunks. This was good for occasional daily inflation use as could be readily dismantled and folded.
Hope all this rambling makes sense and of some help.
__________________
|
|
|
21 February 2021, 13:12
|
#7
|
Member
Country: USA
Town: California
Make: zodiac futura
Length: 4m +
Join Date: May 2018
Posts: 237
|
Quote:
Originally Posted by chipko
Nelvar,
Tried to reply to your pm but strangely couldn't attach any pics, so putting my reply here on the forum. Hope you don't mind, here goes;
Hi Nelvar,
The trolley's (we have a large and small) have been used and modified a few times over the years to suit different boats. We fitted bunks for good support as our sibs sat on these inflated March to November and the trollies only dismantled and folded for storage over winter. The bunks were all made from 38 x 63mm CLS timber and 2400mm long covered with pipe insulation. Tubes always reduced to around half pressure for storage. We also used a cheap hand dolly for ease of hauling by hand over grass, dunes and sand.
The first sib, a Zodiac was aluminium floor so the outer bunks were positioned under the outer edges of the floor next to tubes, and keel fully deflated. Four bunks probably overkill as in reality two would suffice.
For the Aerotec the bunks went under the tubes and the air floor just hung between.
The last incarnation was for a T38. For this the inner bunks ditched and boat supported with single bunks under tubes hard up to floor edges.
We also, at one point, modded the smaller trolley with short bunks. This was good for occasional daily inflation use as could be readily dismantled and folded.
Hope all this rambling makes sense and of some help.
|
I’d add bunks under transom. That’s the weakest and most important connection. Wood to fabric/hard to soft. And the outboards weight is relentless at trying to pull the wood down to the ground. JMO
__________________
|
|
|
21 February 2021, 13:31
|
#8
|
Member
Country: UK - England
Town: Up North and right a bit
Make: XS500/Merc340/Bic245
Length: 5m +
Engine: Mar 60/20/3.5/Hon2.3
Join Date: Sep 2013
Posts: 561
|
Good and valid point.
However, irrelevant to my post. First off on all variants my bunks extend beyond and support the transom. Second, boats all stored without motor attached. Third, towing whilst motor attached, only hand balled or towed at walking speed behind car or tractor on private land/beach.
__________________
|
|
|
22 February 2021, 10:45
|
#9
|
Member
Country: UK - England
Town: Shropshire
Length: 4m +
Join Date: Jan 2021
Posts: 6
|
Perfect - Thank you
Quote:
Originally Posted by chipko
Nelvar,
Tried to reply to your pm but strangely couldn't attach any pics, so putting my reply here on the forum. Hope you don't mind, here goes;
Hi Nelvar,
The trolley's (we have a large and small) have been used and modified a few times over the years to suit different boats. We fitted bunks for good support as our sibs sat on these inflated March to November and the trollies only dismantled and folded for storage over winter. The bunks were all made from 38 x 63mm CLS timber and 2400mm long covered with pipe insulation. Tubes always reduced to around half pressure for storage. We also used a cheap hand dolly for ease of hauling by hand over grass, dunes and sand.
The first sib, a Zodiac was aluminium floor so the outer bunks were positioned under the outer edges of the floor next to tubes, and keel fully deflated. Four bunks probably overkill as in reality two would suffice.
For the Aerotec the bunks went under the tubes and the air floor just hung between.
The last incarnation was for a T38. For this the inner bunks ditched and boat supported with single bunks under tubes hard up to floor edges.
We also, at one point, modded the smaller trolley with short bunks. This was good for occasional daily inflation use as could be readily dismantled and folded.
Hope all this rambling makes sense and of some help.
|
Chipko,
that is fantastic, thank you.
My intention, when the SIB arrives, is to inflate, turn it upside down, and work from there to determine the modifications needed to the trailer.
I prefer your rigid bow-to-stern support, as opposed to my original intention of using webbing to provide lateral support.
Once I have completed the trailer, I will post the photos.
Dave
__________________
__________________
|
|
|
 |
Thread Tools |
Search this Thread |
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|