i think i have boobed

[hermco]

What measurements are you looking for?

[dave2400]

Originally Posted by hermco

What measurements are you looking for?

hi hermco thanks for the reply. the bracket i am thinking off will be 24inch wide with a 24inch setback from looking at the brackets on here that the likes off outhers on here have made it looks thay slant from the transom to transom what is that slant allso how deep is the v in the bottom.... i understand that when fitting it needs to be set 2 inch above the bottom of the keel is the 1inch per foot off setback on top off that for the engine end i am allso thinking off haveing a 4x3 chanel across the inside of the transom top and bottom to reinforce the transom and act as a spreader for the bracket a.t.b dave

[hermco]

You can build the bracket with any shape. It will not be in the water when the boat is on plane. The larger the area that is submerged at rest will determine how much displacement or floatation it will provide if that is an issue. The first bracket designs were just welded tubing and a plate to mount the motor.

[dave2400]

Originally Posted by hermco

You can build the bracket with any shape. It will not be in the water when the boat is on plane. The larger the area that is submerged at rest will determine how much displacement or floatation it will provide if that is an issue. The first bracket designs were just welded tubing and a plate to mount the motor.

hi thanks for that i take onboard what you say about the shape and floatation but what about the 1inch per foot off setback is that ontop of fitting the bracket 2inch above the bottom off the hull or do you fit it 2inch above the bottom off the hull and then 1inch per foot off setback a.t.b dave

[hermco]

You can design it any way you see fit. The end result is the transom at 24" setback should be at least 27" up from the keel.

[dave2400]

Originally Posted by hermco

You can design it any way you see fit. The end result is the transom at 24" setback should be at least 27" up from the keel.

hi thanks for the reply that makes it clear a.t.b dave

[hermco]

Originally Posted by dave2400

hi thanks for the reply that makes it clear a.t.b dave

That is assuming you are using a 25" shaft length outboard. I should have specified that.

[Bushwacker]

Originally Posted by dave2400

hi thanks for that i take onboard what you say about the shape and floatation but what about the 1inch per foot off setback is that ontop of fitting the bracket 2inch above the bottom off the hull or do you fit it 2inch above the bottom off the hull and then 1inch per foot off setback a.t.b dave

Dave, I think the 1"/foot of setback is the often used rule of thumb for height of the motors anti ventilation plate above the keel. In my experience, it needs to be more than that. The engine makers say that the top of AV plate needs to be above the water when you're up on plane with motor trimmed out as far as you normally run. My bracket has a 2.5' setback, so that rule of thumb says my AV plate should be 2.5" above keel. However as you can see in attached pic, it's 3.25" above the metal rail extending aft from keel. I have since raised it to 4.25" and AV plate is STILL underwater, so it needs to come up about another inch! Therefore in my own experience that trade factor would seem to be about 5.25"/2.5' or roughly 2" per foot of setback!

[dave2400]

Originally Posted by Bushwacker

Dave, I think the 1"/foot of setback is the often used rule of thumb for height of the motors anti ventilation plate above the keel. In my experience, it needs to be more than that. The engine makers say that the top of AV plate needs to be above the water when you're up on plane with motor trimmed out as far as you normally run. My bracket has a 2.5' setback, so that rule of thumb says my AV plate should be 2.5" above keel. However as you can see in attached pic, it's 3.25" above the metal rail extending aft from keel. I have since raised it to 4.25" and AV plate is STILL underwater, so it needs to come up about another inch! Therefore in my own experience that trade factor would seem to be about 5.25"/2.5' or roughly 2" per foot of setback!

thanks bushwacker that makes it mutch clearer dave2400

[Blue_Heron]

Originally Posted by dave2400

...from looking at the brackets on here that the likes off outhers on here have made it looks thay slant from the transom to transom what is that slant allso how deep is the v in the bottom....

The geometry of the bracket will be dictated by the geometry of your boat, so it may not be the same as for a Seacraft. For the fore and aft angles, measure the angle between your keel and transom. For the deadrise, you will also want to match your hull.

You can use plywood and glass construction if you like, but you really should use epoxy resin if you go that route. If you use strick's one-off mould method, you can use less expensive polyester resin, you'll have much less fairing to make it look professionally done, and it will be lighter and stronger. The method is tried and true, whereas the plywood/glass approach is a reinvention of the wheel unless you have a professionally designed solution.

Dave