"Joe" wrote in message ...
Now for trim tabs. Great for slow planing but will kill fuel economy
doing
so. They create a lot of drag to force the bow down at slower speeds. Of
course you can raise them and get the efficiency back.

I've found the opposite to be true.

Really, JoeTechnician? Please do tell how you think that trim tabs
don't create drag when they are deployed? And, if they are creating
drag, unfortunately, they are also hurting fuel economy.

"basskisser" wrote in message
om...
"Joe" wrote in message
...
Now for trim tabs. Great for slow planing but will kill fuel economy
doing
so. They create a lot of drag to force the bow down at slower speeds.
Of
course you can raise them and get the efficiency back.

I've found the opposite to be true.

Really, JoeTechnician? Please do tell how you think that trim tabs
don't create drag when they are deployed?
and in And, if they are creating drag, unfortunately, they are also hurting
fuel economy.

Who said they didn't create drag?

But, if the drag they do create is less than the drag they reduce (stern
dive, pushing a wall of water against the bottom of the hull), and
inefficient prop angle (wasted energy pushing the bow up instead of the boat
forward) then the overall decrease in drag will result in increased fuel
efficiency.

I know my boat gets on plain using them if I don't use them and have allot
of people onboard I never get on plain and it would be very inefficient to
keep trying I would think, but then again I don't have a flow scan and a gps
so I can't tell u for sure, but I know if I'm not on plain I'm not going
anywhere fast. Just sitting back relaxing, taking a cruise. Happy boating

"Joe" wrote in message
...

"basskisser" wrote in message
om...
"Joe" wrote in message
...
Now for trim tabs. Great for slow planing but will kill fuel
economy
doing
so. They create a lot of drag to force the bow down at slower
speeds.
Of
course you can raise them and get the efficiency back.

I've found the opposite to be true.

Really, JoeTechnician? Please do tell how you think that trim tabs
don't create drag when they are deployed?
and in And, if they are creating drag, unfortunately, they are also
hurting
fuel economy.

Who said they didn't create drag?

But, if the drag they do create is less than the drag they reduce (stern
dive, pushing a wall of water against the bottom of the hull), and
inefficient prop angle (wasted energy pushing the bow up instead of the
boat
forward) then the overall decrease in drag will result in increased fuel
efficiency.

"Wildest Dream" wrote in message

I know my boat gets on plain using them if I don't use them and have allot
of people onboard I never get on plain and it would be very inefficient to
keep trying I would think, but then again I don't have a flow scan and a
gps
so I can't tell u for sure, but I know if I'm not on plain I'm not going
anywhere fast. Just sitting back relaxing, taking a cruise. Happy boating


If you can't plane at full throttle without tabs, but can plane with them,
there is no doubt that using the tabs on your boat is improving your fuel
consumption.

"Joe" wrote in message ...
"basskisser" wrote in message
om...
"Joe" wrote in message
...
Now for trim tabs. Great for slow planing but will kill fuel economy
doing
so. They create a lot of drag to force the bow down at slower speeds.
Of
course you can raise them and get the efficiency back.

I've found the opposite to be true.

Really, JoeTechnician? Please do tell how you think that trim tabs
don't create drag when they are deployed?
and in And, if they are creating drag, unfortunately, they are also hurting
fuel economy.

Who said they didn't create drag?

But, if the drag they do create is less than the drag they reduce (stern
dive, pushing a wall of water against the bottom of the hull), and
inefficient prop angle (wasted energy pushing the bow up instead of the boat
forward) then the overall decrease in drag will result in increased fuel
efficiency.

****, here we go again, JoeTechnician, I even have to explain what to
hell YOU responded to. Read the second sentence of the original post:
They create a lot of drag to force the bow down at slower speeds.
Of course you can raise them and get the efficiency back.

At slower speeds, they definately DO create more drag. AT SLOWER
SPEEDS, get it? You are plunging a planar piece of material, at an
angle, into the water. Do you think that is creating drag, yes or no
please. Now, that in turn, pushes the bow down, again, we are AT
SLOWER SPEEDS. So, you are essentially putting more of the hull in
contact with the water. Do you not think this, AT SLOWER SPEEDS,
creates drag? Yes or no, please.

****, here we go again, JoeTechnician, I even have to explain what to
hell YOU responded to. Read the second sentence of the original post:
They create a lot of drag to force the bow down at slower speeds.
Of course you can raise them and get the efficiency back.

I know exactly what I responded to and stand by my statement.

At slower speeds, they definately DO create more drag. AT SLOWER
SPEEDS, get it? You are plunging a planar piece of material, at an
angle, into the water. Do you think that is creating drag, yes or no
please.

If not correctly adjusted they might (extended too far).
Here's a shocker for you, they usually work better at slower speeds and
rougher seas than they do at higher speeds and calmer seas.
I'm not talking about idle speeds when I say "slower speeds" but they will
begin to be efficient approximately at the point that you can plane with the
tabs adjusted down.

Here's real world scenario for you- On my boat (21.5' CC 200hp), at 3000rpm
the boat will ride with a bow high attitude with stern dive. As I actuate
the trim tabs the stern rises, the bow lowers and the boat planes. Once
planed the rpm's will immediately climb (without touching the throttle) and
my speed increases. I then can reduce throttle back to 3000rpm and continue
along on a plane.

Now, tell me, do you think my boat is more, or less efficient at 3000rpm's
with my tabs down or tabs up?

Now, that in turn, pushes the bow down, again, we are AT
SLOWER SPEEDS. So, you are essentially putting more of the hull in
contact with the water. Do you not think this, AT SLOWER SPEEDS,
creates drag? Yes or no, please.

Trim tabs, when activated, will *always* add some drag, and as I said-

"But, if the drag they do create is less than the drag they reduce (stern
dive, pushing a wall of water against the bottom of the hull), and
inefficient prop angle (wasted energy pushing the bow up instead of the boat
forward) then the overall decrease in drag will result in increased fuel
efficiency."


Here's some reading for you.

http://www.bennetttrimtabs.com/whatdo.htm
http://www.trimmaster.net/id114.htm
http://www.boatus.com/boattech/trimtabs.htm
http://www.powerandmotoryacht.com/fe...abs/index.html
http://www.h-ri.com/Product/Duraplane/Duraplane_01.html

"Joe" wrote in message news:4hwqb.4312
Here's some reading for you.

http://www.bennetttrimtabs.com/whatdo.htm
http://www.trimmaster.net/id114.htm
http://www.boatus.com/boattech/trimtabs.htm
http://www.powerandmotoryacht.com/fe...abs/index.html
http://www.h-ri.com/Product/Duraplane/Duraplane_01.html


Uh, yeah, sure. All of the above are trying to sell a product, you
idiot. McDonalds claims the Big Mac is the best burger in the world.
Do you swear by that, too, JoeTechnician? Dol-fin claims that there
product will increase fuel mileage, too. You are stupid if you think
that by creating MORE DRAG, that you are increasing fuel economy.

"basskisser" wrote in message
om...
"Joe" wrote in message news:4hwqb.4312
Here's some reading for you.

http://www.bennetttrimtabs.com/whatdo.htm
http://www.trimmaster.net/id114.htm
http://www.boatus.com/boattech/trimtabs.htm
http://www.powerandmotoryacht.com/fe...abs/index.html
http://www.h-ri.com/Product/Duraplane/Duraplane_01.html


Uh, yeah, sure. All of the above are trying to sell a product, you
idiot. McDonalds claims the Big Mac is the best burger in the world.
Do you swear by that, too,

So, you're saying that they're all wrong and you're right? Who woulda thunk.

JoeTechnician? Dol-fin claims that there
product will increase fuel mileage, too.

Don't know, never used them, never have heard anything good about them
though.

You are stupid if you think
that by creating MORE DRAG, that you are increasing fuel economy.

Open your eyes kevin, your only looking at one part of the equation.

You forgot to answer my question-

Here's real world scenario for you- On my boat (21.5' CC 200hp), at 3000rpm
the boat will ride with a bow high attitude with stern dive. As I actuate
the trim tabs the stern rises, the bow lowers and the boat planes. Once
planed the rpm's will immediately climb (without touching the throttle) and
my speed increases. I then can reduce throttle back to 3000rpm and continue
along on a plane.

Now, tell me, do you think my boat is more, or less efficient at 3000rpm's
with my tabs down or tabs up?

"Joe" wrote in message .. .
You forgot to answer my question-

Here's real world scenario for you- On my boat (21.5' CC 200hp), at 3000rpm
the boat will ride with a bow high attitude with stern dive. As I actuate
the trim tabs the stern rises, the bow lowers and the boat planes. Once
planed the rpm's will immediately climb (without touching the throttle) and
my speed increases. I then can reduce throttle back to 3000rpm and continue
along on a plane.

Now, tell me, do you think my boat is more, or less efficient at 3000rpm's
with my tabs down or tabs up?

Uh, you are changing the subject here. You previously said more FUEL
efficient, now you are simply saying efficient. As far as fuel
efficiency goes, 3000rpm is 3000rpm, whether the boat is running flat
in the water, or straight up, so no, your fuel effeciency hasn't
increased. Your ride may be better, at the SAME fuel rate, but your
fuel effeciency hasn't changed. Do you not understand that? Do you
also not understand that when you use a tab, you are sticking a metal
plate out to drag in the water? Now, again, answer me....do you think
it is more fuel efficient to create drag by using trim tabs, or to
distribute weight to achieve the same ride characteristics?