Transom Distortion Options

[poly]

there was an argument at work were it was said that if u over power a boat to much it will distort the transom to the point were the boat can no longer be trimmed and in a worst case it may be possible to berry the nose, i am not talking about small tines with over size motors but much larger boats in the 5 or 6mt range, could this be true.

[Spudly]

you would hope that a quality built boat would not distort.

However carring to much weight up front in a ribbed tinny or possibly a poly??
It could happen?? I highly doubt it though as you would need alot of weight up there
to counteract the natural planing of the hull once underway.

Once the boat is planning and therefore not producing much drag i would imagine yuo
could wind on as much power as you wanted, untill it was to much and flipped you backwards!

[Spudly]

If you could get some figures from th amount of force that an engine drives through the water at
and the weight of the boat etc it could easily be figured out using some basic physics.

Im quite sure that as long as the boat gets on the plane it is not a problem, th issue would maybe be an overloaded boat struggeling to get onto the plane, then it becomes a possability?

[Jumpus GooDarus]

Tell the guys @ your work that Jumpus said they are talking out of their :drop the daks: & that I can see the brown stuff coming out

Boats have a HP rating & if you exeed it then the warrantee on the boat is void

As far as distorting the transom goes ?? well that is another porky those guys are telling you exept maybe in the case of some of the tinny's which dont have a proper transom just a drop down section to allow for hight so as motor can be bolted to @ the correct hight.

Even those tinny's do have a brace or braces to stop the transom from twisting so distortion is kept to a minimun.

Now you've got very little if any chance @ all of distorting a true tansom simply because of the way they are supported.

The reason HP ratings are attached to a hull is for a number of reasons here's a couple

a] get a lunatic with to much power & he'll kill someone then sue boat manufacturer

b] To much power can also push the boat to it's limits & cracking can occur [not distortion]

over power a boat to much it will distort the transom to the point were the boat can no longer be trimmed and in a worst case it may be possible to berry the nose,

Not very likly @ all poly !

For starters unless you're a goose you gradully power up a boat you dont hit the hammers from the onset unless you're a ski/race boat & those type of boats are generally very well balanced.

As far as trim goes on a boat ??

Well I dont think to many people really know how to use it correctly they take off with motor tilted up then wonder why it takes so long for the boat to start planning correctly.

There's a big difference between Tilt & Trim

Tilt brings your motor up & down

Trim allows you to fine tune your ride

[poly]

that was my argument if the power is so gr8 it would lift the nose and not drive it down. i do believe that a transom can distort to a point but i think it would brake before it started pushing the nose down

If you could get some figures from the amount of force that an engine drives through the water at
and the weight of the boat etc it could easily be figured out using some basic physics.

i will have to leave that to someone more qualified than me


i had to do the milking the day teacher tought physics

[Spudly]

unless thre was a massive wigfht in the front of the boat then it would just flip if there was that much power?

there is very little weight on th transom once planning, because the water passing under the hull is
supporting the boat (as long as its setup correctly)

With our old race boats and some high powered ski boats you will see them with the motor trimmed up
and the boat very rarley touching the water, this is done with great feel through the "Foot Pedal" and a VERY
High power engine!

Maybe in this case if you had a ton of steel up the front of the boat then it could as the boat is not being supported by the water and the point of torsion is at the rear where the motor joins the hull.

A fishing boat or similar this is not the case because the water is in constant contact with 3/4 of the boat and all the engine is doing is providing forward thrust, there is no way it could build enough twist or torque to flex back of the boat..

Torque = F (being the force) X Distance

Ill have to work out Hp to Nm to figure it out and then figure in the weight of the hull but it is possable to figure out exactly which way th driving force of the engine is, and im pretty sure you will find that it is straight forward whn planning.

When the hull is in displacment then there are more forces such as resistance on the hull and th formula gets more complecated..

Wait till i have had a few rums and ill gt my notes out.

This post has been edited by Rum Dust N Ruckus: Sep 12 2007, 10:39 PM

[Fed]

Look at it this way Poly, the distortion will assist your boat in planing and could be considered a Poly feature.
You should email the Poly website and suggest they add flexible transoms to their feature list.

[Jumpus GooDarus]

Look at it this way Poly, the distortion will assist your boat in planing and could be considered a Poly feature.
You should email the Poly website and suggest they add flexible transoms to their feature list.

[poly]

Look at it this way Poly, the distortion will assist your boat in planing and could be considered a Poly feature.
You should email the Poly website and suggest they add flexible transoms to their feature list.

hmmmmm if in dead the transom of a poly did distort then it would be down to the plat alloy used to reinforce it and J G has said that alloy dose not distort, so FED are u trying to tell me that jumpus is telling porkies :l


ok u can see the alloy reinforcing in this photo.



how kool is this i can now post photos

This post has been edited by poly: Sep 13 2007, 08:46 PM

[poly]

this one is just for fun



two wags in a boat guess ho

[Smelly]

how kool is this i can now post photos

Good on'ya Poly


RUB IT IN y don't cha


Now we just need some of some fish .

Seriously you must be stoked,that is cool B)

SMELLY
and that wag,has gotta be STEVE,i mean look at the size of that burley bucket,looks like a garbage to put all his food scraps in,don't now bout the mug with the camera tho

This post has been edited by Smelly: Sep 14 2007, 03:07 AM

[Jumpus GooDarus]

Well !

Someone once told me that if you tow a A Plastic Milk Crate behind the boat it will stop Transom Distortion

And The Blue Ones Work The Best

Yep they have Dairy Farmers written on them

[poly]

here are some fish for u smelly

A Plastic Milk Crate behind the boat it will stop Transom Distortion

And The Blue Ones Work The Best

J G i can see through this friend of yours, tell the truth u have been using them for years.

[Jumpus GooDarus]

Uh Uh ! not me

I cant tell a lie it was Fed behind the Gudma

[SUMOFISHIN]

That big Lizard in the middle was MINE special catch on ultra lite gear

[poly]

yep yep that it was



:TazSpin2:

[poly]

I cant tell a lie it was Fed behind the Gudma

no u will have to find story than that, Fed is to nice a bloke to do such a thing.