Doel-Fins

Doel-Fins

Post by Pursuit2 » Thu, 15 Jun 2000 04:00:00


I've been reading all the articles on Doel-fins and the such but most seem to
be at smaller horsepower motors and under 22-foot boats.  Has anyone ever put
one on a 25' foot boat with a 250hp outboard that wieghts  6000lbs.?
I would be interested in one for my Wellcraft if anyone has used them on this
size of a boat.
Thanks
Todd
 
 
 

Doel-Fins

Post by fix » Thu, 15 Jun 2000 04:00:00



Quote:
> I've been reading all the articles on Doel-fins and the such but most seem to
> be at smaller horsepower motors and under 22-foot boats.  Has anyone ever put
> one on a 25' foot boat with a 250hp outboard that wieghts  6000lbs.?
> I would be interested in one for my Wellcraft if anyone has used them on this
> size of a boat.
> Thanks
> Todd

I have one on my Merc 40 16  footer

It does good considering the cost of trim tabs.

 
 
 

Doel-Fins

Post by Todd Hudge » Thu, 15 Jun 2000 04:00:00

My 22 foot cuddy is front heavy. The fin helps me plane slower, and get the
bow out of the water (thus producing better speeds) at lower throttle
settings.

A friend has a 19 foot bowrider that is front light. He's going to try a fin
to keep the bow down in rough water in the next week or so... I'll report.

--
A nation that protects fools from themselves, will become a nation of fools

No Spam Please
Todd Hudgel


Quote:


> > I've been reading all the articles on Doel-fins and the such but most
seem to
> > be at smaller horsepower motors and under 22-foot boats.  Has anyone
ever put
> > one on a 25' foot boat with a 250hp outboard that wieghts  6000lbs.?
> > I would be interested in one for my Wellcraft if anyone has used them on
this
> > size of a boat.
> > Thanks
> > Todd

> I have one on my Merc 40 16  footer

> It does good considering the cost of trim tabs.


 
 
 

Doel-Fins

Post by Dick Jon » Sat, 17 Jun 2000 04:00:00

USED ON TWIN OUTBOARDS ( 225's )
WITH GREAT RESULTS FOR 30 FT WALKAROUND! NOT DOEL - FINS
BUT VERY SIMILAR.
 
 
 

Doel-Fins

Post by hitm » Tue, 20 Jun 2000 04:00:00

On Wed, 14 Jun 2000 19:49:35 -0500, "Todd Hudgel"

Quote:

>My 22 foot cuddy is front heavy. The fin helps me plane slower, and get the
>bow out of the water (thus producing better speeds) at lower throttle
>settings.

>A friend has a 19 foot bowrider that is front light. He's going to try a fin
>to keep the bow down in rough water in the next week or so... I'll report.

Why not properly trim the engine?

Quote:

>--
>A nation that protects fools from themselves, will become a nation of fools

>No Spam Please
>Todd Hudgel





>> > I've been reading all the articles on Doel-fins and the such but most
>seem to
>> > be at smaller horsepower motors and under 22-foot boats.  Has anyone
>ever put
>> > one on a 25' foot boat with a 250hp outboard that wieghts  6000lbs.?
>> > I would be interested in one for my Wellcraft if anyone has used them on
>this
>> > size of a boat.
>> > Thanks
>> > Todd

>> I have one on my Merc 40 16  footer

>> It does good considering the cost of trim tabs.

__________________________________________
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Sebastian Fl, formerly NJ
(Maplewood, Neptune, Bricktown[Laurelton], Toms River)

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Doel-Fins

Post by Karl Denning » Tue, 20 Jun 2000 04:00:00



Quote:
>On Wed, 14 Jun 2000 19:49:35 -0500, "Todd Hudgel"

>>My 22 foot cuddy is front heavy. The fin helps me plane slower, and get the
>>bow out of the water (thus producing better speeds) at lower throttle
>>settings.

>>A friend has a 19 foot bowrider that is front light. He's going to try a fin
>>to keep the bow down in rough water in the next week or so... I'll report.
>Why not properly trim the engine?

What do you think a fin does?  (Hint: it increases the effect of the trim,
which means you can trim less "up" and get more bow rise, and also, your
trim down has more effect in keeping the bow down.)

The hydrodynamic effect tends to lift the stern in trimmed-in or neutral
positions, which also helps if you are stern-heavy (as most I/O and
outboard boats in fact are)

I have found that the Doel makes a *massive* improvement in rough-water
handling on my boat.  The improvement comes from two sources:

1.      It allows me to keep the bow down and avoid slamming in heavier
        conditions.

2.      Perhaps even more importantly, it allows me to stay on plane at FAR
        slower speeds, which combined with judicious trim adjustment allows
        me to run over waves and chop instead of having only the option of
        slamming into it or reducing speed to displacement operation.

I've now had the boat out post-Doel installation in chop that would have had
me either dealing with slamming or reducing speed to displacement mode, and
was able to run without pounding on plane.  For me and this boat that's a
HUGE win in that it allows me to COMFORTABLY go out in the bay in conditions
that I could not before unless I was willing to decrease speed to roughly 10
knots max.  

That is, more to the point, at the same passenger comfort level I can now
run at TWICE the speed in identical sea conditions.

I call that a HUGE performance win.

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