Re: [bolger] Re: question of effeciency
You have given me a great idea and I will mock up a plane trim tab in a sponson shape. The effect will lengthen the boat and lift the stern. I was told by the coast guard to use a tiller exetension and sit midship when fishing alone. I added a passenger and she was lifted under power so the fix needs to be at the stern. I thought to add a seabright pod but I use the boat for rowing and will add a sail soon. The removable trim idea is the best until I build another boat. I have adjusted the trim of the motor to the extreme setting and it still lifted and made a wild rooster tail under power, went nowhere, made a huge wake and still lifted the bow.
Thanks for the idea, I like it.
Bruce
-------------- Original message ----------------------
From: "mark hamill" <mhamill1@...>
Thanks for the idea, I like it.
Bruce
-------------- Original message ----------------------
From: "mark hamill" <mhamill1@...>
> Three things I have done on a Y stern freighter canoes to solve a[Non-text portions of this message have been removed]
> similar problem were:
> 1 buy a Doelfin plane blade for the outboard motor lower end. The
> copycat ones are cheaper--about $13 cdn. This workeked very well on
> my former 23 foot and that was all I needed for that boat.
> 2. add weight to the bow in the form of 5 gallon water jugs--2 worked
> great on the 17 foot.
> 3. On the 17 foot I later used a Thailand type--(remember James Bond)
> Dragon tail motor and glassed in a planing board on each side at an
> angle--the effect of which you could duplicate by adding a simple
> trim tab each side of the engine that could be removed after use. It
> has to be mounted so it does not move up but that is easy to do.
> Personally, I would start with the weight formard, then the Doelfin,
> then the trim tabs. None of these boats had any rocker so I am not
> sure how they would work on rockered boats.
> Cheers, Mark
>
>
> --- Inbolger@yahoogroups.com, echo172@... wrote:
> >
> > I am considering a design of a power pod to attach to my rowboat.
> The pod would be held via the transom and motor with skeg attachments
> to tie the unit to the hull. The idea is to add to the boat two
> sponsons to reduce the rocker and mimick a hydroplane. It is only for
> planing and not intended for high speed as the motor is only 6 hp. I
> would use foam and ply covering for the prototype. This is due to the
> nose high attitude my boat has under power, which is way overpowered
> at 6 hp. Does anyone have any knowledge or insight into such a
> modification?
> > The pod would mount against the transom as it would be pushed
> against the transom by the motor. The idea was spawned by some
> hydrofoil sailboats and my previous RC outrigger hydro. It seems like
> a easy to do project but I cringe at surface area calculation to make
> the sponsons right so uncovered trial and error foam will be tried.
> > Bruce in NJ
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
Three things I have done on a Y stern freighter canoes to solve a
similar problem were:
1 buy a Doelfin plane blade for the outboard motor lower end. The
copycat ones are cheaper--about $13 cdn. This workeked very well on
my former 23 foot and that was all I needed for that boat.
2. add weight to the bow in the form of 5 gallon water jugs--2 worked
great on the 17 foot.
3. On the 17 foot I later used a Thailand type--(remember James Bond)
Dragon tail motor and glassed in a planing board on each side at an
angle--the effect of which you could duplicate by adding a simple
trim tab each side of the engine that could be removed after use. It
has to be mounted so it does not move up but that is easy to do.
Personally, I would start with the weight formard, then the Doelfin,
then the trim tabs. None of these boats had any rocker so I am not
sure how they would work on rockered boats.
Cheers, Mark
similar problem were:
1 buy a Doelfin plane blade for the outboard motor lower end. The
copycat ones are cheaper--about $13 cdn. This workeked very well on
my former 23 foot and that was all I needed for that boat.
2. add weight to the bow in the form of 5 gallon water jugs--2 worked
great on the 17 foot.
3. On the 17 foot I later used a Thailand type--(remember James Bond)
Dragon tail motor and glassed in a planing board on each side at an
angle--the effect of which you could duplicate by adding a simple
trim tab each side of the engine that could be removed after use. It
has to be mounted so it does not move up but that is easy to do.
Personally, I would start with the weight formard, then the Doelfin,
then the trim tabs. None of these boats had any rocker so I am not
sure how they would work on rockered boats.
Cheers, Mark
--- Inbolger@yahoogroups.com, echo172@... wrote:
>
> I am considering a design of a power pod to attach to my rowboat.
The pod would be held via the transom and motor with skeg attachments
to tie the unit to the hull. The idea is to add to the boat two
sponsons to reduce the rocker and mimick a hydroplane. It is only for
planing and not intended for high speed as the motor is only 6 hp. I
would use foam and ply covering for the prototype. This is due to the
nose high attitude my boat has under power, which is way overpowered
at 6 hp. Does anyone have any knowledge or insight into such a
modification?
> The pod would mount against the transom as it would be pushed
against the transom by the motor. The idea was spawned by some
hydrofoil sailboats and my previous RC outrigger hydro. It seems like
a easy to do project but I cringe at surface area calculation to make
the sponsons right so uncovered trial and error foam will be tried.
> Bruce in NJ
>
>
>
> [Non-text portions of this message have been removed]
>
I am considering a design of a power pod to attach to my rowboat. The pod would be held via the transom and motor with skeg attachments to tie the unit to the hull. The idea is to add to the boat two sponsons to reduce the rocker and mimick a hydroplane. It is only for planing and not intended for high speed as the motor is only 6 hp. I would use foam and ply covering for the prototype. This is due to the nose high attitude my boat has under power, which is way overpowered at 6 hp. Does anyone have any knowledge or insight into such a modification?
The pod would mount against the transom as it would be pushed against the transom by the motor. The idea was spawned by some hydrofoil sailboats and my previous RC outrigger hydro. It seems like a easy to do project but I cringe at surface area calculation to make the sponsons right so uncovered trial and error foam will be tried.
Bruce in NJ
[Non-text portions of this message have been removed]
The pod would mount against the transom as it would be pushed against the transom by the motor. The idea was spawned by some hydrofoil sailboats and my previous RC outrigger hydro. It seems like a easy to do project but I cringe at surface area calculation to make the sponsons right so uncovered trial and error foam will be tried.
Bruce in NJ
[Non-text portions of this message have been removed]