Reply
 
Thread Tools Search this Thread
 
Old 20 March 2009, 00:31   #1
Member
 
Country: Canada
Length: under 3m
Join Date: Mar 2009
Posts: 10
Can you plane or get up on top of the water with a flat bottom sib?

Hey im still deciding between a flat bottom sib with slatted wood floor or a sib with an inflatable keel and plywood floor.

My question for you is, can you still plane and get up on top of the water with a flat bottom or do they kind of just drag themselves in the water.

I will be using a 6-10 hp motor, not sure yet.

Im getting a way better deal on the flat bottom so its a really tough decision.

Thanks guys and im sorry for all the dumb questions. This is just a lot of money for me so its important.

Ryan
__________________

__________________
vlasveld is offline   Reply With Quote
Old 20 March 2009, 03:50   #2
Member
 
Country: UK - England
Town: Wilmslow
Boat name: Serotonin
Make: Quicksilver
Length: 3m +
Engine: Mariner 15
Join Date: Feb 2003
Posts: 712
have a look at this -

So yes flat bottoms do plane, although I prefer a curvy one

how big are the boats that you are looking at?
__________________

__________________
fred bolton is offline   Reply With Quote
Old 20 March 2009, 03:59   #3
Member
 
Country: Canada
Length: under 3m
Join Date: Mar 2009
Posts: 10
haha thats awesome. I dont think i worded my question very well. Im only looking at 3 meter SIB's but what I was trying to figure out is can you still plane with a short little flat bottom. I guess i was just trying to figure out if you have a little 9 foot sib with a 10 horse motor on it can you sill plane and go fast up on top of the water.

If you have one with a slatted roll up floor that is flat bottom will you get destroyed if you hit a wave going full speed?

Haha i know these questions probably seem dumb to you guys but i've never even rode in one of these thigns so im trying to figure it out before i buy one.
__________________
vlasveld is offline   Reply With Quote
Old 20 March 2009, 06:39   #4
Member
 
m chappelow's Avatar
 
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
our club sec in his flat bottomed sib with a 4 hp engine , it will plane one person as long as the weight is well forwards.
Attached Thumbnails
Click image for larger version

Name:	030.JPG
Views:	295
Size:	68.8 KB
ID:	41277  
__________________
m chappelow is offline   Reply With Quote
Old 20 March 2009, 06:44   #5
Member
 
Country: Canada
Length: under 3m
Join Date: Mar 2009
Posts: 10
what about with some extra weight in the front like a beer cooler or another person?
__________________
vlasveld is offline   Reply With Quote
Old 20 March 2009, 07:16   #6
Member
 
m chappelow's Avatar
 
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
Quote:
Originally Posted by vlasveld View Post
what about with some extra weight in the front like a beer cooler or another person?
with a bigger engine yes but for a small engine like the 4 hp in the pic you need as less weight as you can have on board, in the pic he needed to sit further forwards but he dident have a tiller extention with him .just been looking through an old avon catalog and for a 10 foot long flat bottom no keel boat with a transom it will give approx 14 mph with a 6hp engine and 1 person and 12 mph with 2 persons,then with 10 hp 18 mph with one up and 16 mph with 2 persons they are only approx and its a very old book but might give you some idea.
__________________
m chappelow is offline   Reply With Quote
Old 20 March 2009, 10:22   #7
Member
 
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
I had a Bombard AX3 (slatted floor) that with 3.5hp would plane with 1up - BUT dod not like any sort of chop at all . If you want to stay on the plane you may 'need' the slight V hull of the keel, but if you will use mainly on flat ( & I mean realy flat ) water you can get away with the flat floor.

I now have an air deck AX2 as tender that wont plane with 2.5 hp........ shame !
__________________
PeterM is offline   Reply With Quote
Old 20 March 2009, 15:06   #8
Member
 
Country: UK - England
Town: Torbay
Boat name: Marlin
Make: PBS humber 5.5
Length: 5m +
Engine: 115 optimax!!
Join Date: Jul 2003
Posts: 350
Quote:
Originally Posted by m chappelow View Post
our club sec in his flat bottomed sib with a 4 hp engine , it will plane one person as long as the weight is well forwards.
I used to have one of those a zodiac SERIE 134 (3.4m long). Ours had a wooden floor and inflatable keel. Ours planed with about 15 stone of load in. We had a yamaha 6hp 2 stroke. We kneeboarded behind it, but only with 1 person in the boat (tut tut)....and it used to take a while to get on the plane with a boarder happy days
__________________
Colin F is offline   Reply With Quote
Old 21 March 2009, 11:07   #9
Member
 
Country: UK - Scotland
Town: Highlands
Boat name: Quicksilver
Make: Quicksilver
Length: 3m +
Engine: Mariner 15hp
Join Date: Aug 2001
Posts: 1,771
A SIB with an inflatable keel will be easier to control than one with a flat bottom. It will also be more comfortable in a chop. There is a reason for the keel after all.

Keith Hart
__________________
Small boat - BIG truck

www.photo4x4.co.uk
Keith Hart is offline   Reply With Quote
Old 23 March 2009, 04:41   #10
Member
 
Country: UK - England
Town: Ipswich
Boat name: Jammy Dodger
Make: Avon Adventure 7.20
Length: 7m +
Engine: 200 Yamaha
Join Date: Dec 2008
Posts: 331
Send a message via MSN to willfinch36
I had an avon redstart with a 4hp yamaha, that would skim the surface really well, once had 12 knots out of it when i was about 14!!
__________________

__________________
willfinch36 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 04:21.


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