Reply
 
Thread Tools Search this Thread
 
Old 09 March 2009, 07:16   #1
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
Hydrofoils

Ive got them on my new rib - never had a outboard before with them

Cant say i notice much difference? anyone else got them? opinions on them?

picture (for example!) http://www.safety-marine.co.uk/dbima...ins-medium.jpg
__________________

__________________
willfinch36 is offline   Reply With Quote
Old 09 March 2009, 07:21   #2
Member
 
Country: UK - England
Town: I.O.W/Bristol
Boat name: HotShot
Make: shakey
Length: 5m +
Engine: 70hp Tohatsu
Join Date: Jul 2003
Posts: 1,543
They are supposed to give better performance while carrying heavier loads as they increase lift at the stern. I imagine however that they may reduce top speed under normal conditions and I seem to remember before a couple of people mentioning about "dangerous" handling characteristics in, I think, a heavy following sea.

Someone else may be able to elaborate...
__________________

__________________
slimtim is offline   Reply With Quote
Old 09 March 2009, 07:25   #3
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 dont - and wont be carrying any "heavy loads" so think i will take them off, and if they drag! dont want that!
__________________
willfinch36 is offline   Reply With Quote
Old 09 March 2009, 07:29   #4
Member
 
Country: UK - England
Town: Poole
Length: no boat
Join Date: Jul 2001
Posts: 673
Best thing to do is take them off and see if you can tell the difference. I used to have a pair on a big ( in its day ) outboard and thought they helped with handling.

Regards

Mark
__________________
MarkWildey is offline   Reply With Quote
Old 09 March 2009, 12:40   #5
Member
 
Country: UK - Scotland
Town: Ayrshire
Boat name: Raven
Make: Ribcraft
Length: 5m +
Engine: 150 suzuki
MMSI: 235040525
Join Date: Aug 2006
Posts: 653
Quote:
Originally Posted by willfinch36 View Post
Ive got them on my new rib - never had a outboard before with them

Cant say i notice much difference? anyone else got them? opinions on them?

picture (for example!) http://www.safety-marine.co.uk/dbima...ins-medium.jpg
Relevant if you are water sporty.

My own experience was that some water sports like wakeboarding,need the boat to stay at a speed which proves problematic to the boat, it wants to be either on the plane or off it.This leads to constantly adjusting the power to maintain the correct speed. DolFins do increase the stability by lifting the stern.

This was the only positive I found, as the boat actually went a little slower.
__________________
.
IBWET is offline   Reply With Quote
Old 09 March 2009, 12:43   #6
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
ok, ill take them off this weekend and see if it makes any difference to my speed, if not ill put them back on.
__________________
willfinch36 is offline   Reply With Quote
Old 09 March 2009, 18:18   #7
Member
 
Country: UK - England
Town: Fareham
Boat name: Wave Glider
Make: Cobra 7.55
Length: 7m +
Engine: Suzuki 250
Join Date: Sep 2004
Posts: 118
Hi, just my 2 cents worth....

I have used these hydrofoils in the past and have had very positive results. The first rib was on a small Narwhal 2-70 with a Mercury XR 10 about 15 years ago, the boat would plane with 2 people but not with both my parents and me when I was a wee nipper! We fitted them and she planned with all three of us no problem, Sorry reminicing now, that was my first rib and loved it!

The second experience was a few years ago on a Avon 5.45 with a Mariner 90. On this Rib the seating was close to the back and with the heavy 90 on the back when I used to travel up and down the Hamble the bow would rise so high when travelling at 5 knots upwards I could not drive sitting down. I fitted the fins and the bow didnt lift! It also made planing much faster, if it did affect the top end it was not noticable....

Hope that helps, I would only fit them on a rib that had trouble planing or sat bow high but highly recommend if that is the case
__________________
adams1x is offline   Reply With Quote
Old 10 March 2009, 09:49   #8
Member
 
Country: UK - England
Town: Saltash, Cornwall
Make: Rib less:-(
Length: no boat
Join Date: Sep 2002
Posts: 693
Having had a boat that had these fitted, yes they do get on the plane quicker but also seen to prematurely wear the mounts and steering bearings.
Hence I didn't refit them after having a new transom shield fitted which replaced the steering bearings.
Rgds
James
__________________

__________________
Jelly 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 08:29.


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