Reply
 
Thread Tools Search this Thread
 
Old 06 November 2011, 16:46   #1
Member
 
Country: France
Town: Cherbourg
Length: 5m +
Join Date: Jan 2009
Posts: 39
Top speed sr 4.7/70hp?

Hi, I think somebody's here have any experience of sr4.7 with 70 hp, so what what top speed can be achieve with this power?
Are 35/37 knots possibles?
What is the correct height of the outboard on the transom for good performances?

Thanks all.
__________________

__________________
tom's is offline   Reply With Quote
Old 06 November 2011, 16:54   #2
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
Mine did around 35 kts with a Twatsoo 70.

Cav plate was 35mm above the keel
__________________

__________________
Downhilldai is offline   Reply With Quote
Old 06 November 2011, 17:03   #3
Member
 
Country: France
Town: Cherbourg
Length: 5m +
Join Date: Jan 2009
Posts: 39
With a Tohat TLDI or carb?
Do you remember what propeller had you?

Thank
__________________
tom's is offline   Reply With Quote
Old 06 November 2011, 17:09   #4
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
Quote:
Originally Posted by tom's View Post
With a Tohat TLDI or carb?
Do you remember what propeller had you?

Thank
Old skool carb 3 cyl 2006/7 motor, running a Turning Point Hustler 17" pitch 3 blade aluminium prop and making around 5500 RPM.

TLDi is too heavy for an SR4.7 with 20" transom.

__________________
Downhilldai is offline   Reply With Quote
Old 07 November 2011, 04:57   #5
Member
 
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,020
I got 35.5 knots out of mine and that was one up with two tanks of fuel and into a very strong head wind, so 35 - 37 sounds about right.

My outboard is fitted so the brackets are touching the top of the transom but it is offset around 2" to starboard.
__________________
whisper is offline   Reply With Quote
Old 07 November 2011, 08:37   #6
Member
 
Country: France
Town: Cherbourg
Length: 5m +
Join Date: Jan 2009
Posts: 39
Thank you for your comments. Here in France, there is a compagny "Sillinger" who produce ribs with the same hull as the sr 4.7, look at this:Sillinger 490 RIBUM is a semi-rigid professional boat made by Sillinger, a professional and military boat specialist
These boats an specialy the 4.90 RIB UM is renowned here, essentiely used by sea anglers or for spearfishing.
Somes pictures:Sillinger 490
__________________
tom's is offline   Reply With Quote
Old 07 November 2011, 09:38   #7
Member
 
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,020
I very much doubt if they are the same. The Avon Searider has now been re-launched by Zodiac with different tubes and console but the hull is still the same:

http://www.zodiacmilpro.com/wp-conte...-RIDER-4.7.pdf

Here is a link to the Avon website if you need any info on the Avon searider:

AboarD Boats & Yachts Market - SR4.7M Searider
__________________
whisper is offline   Reply With Quote
Old 07 November 2011, 15:16   #8
Member
 
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,020
This thread may help:

What do you think?
__________________
whisper is offline   Reply With Quote
Old 07 November 2011, 15:30   #9
Member
 
Country: France
Town: Cherbourg
Length: 5m +
Join Date: Jan 2009
Posts: 39
I'm absolutely sure that sillinger have produce and produce the same hull as sr 4.7. 2/3 year ago they produced also the 540 rib who had the same hull as the sr 5.4. When they had produce the first hull arround 1990, they adopted also the principe of the ballast. Since 2000, hulls are produced without this famous ballast.
I will try to post some pics of this hull...
__________________
tom's is offline   Reply With Quote
Old 07 November 2011, 15:35   #10
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
Quote:
Originally Posted by tom's View Post
Since 2000, hulls are produced without this famous ballast.
As were some Seariders


Quote:
Originally Posted by tom's View Post
I will try to post some pics of this hull...
Look forward to seeing these.
__________________

__________________
Downhilldai 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 23:51.


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