strengthening the rear of a PT stealth cowl

[tmunn]

Guys i have one of phil's stealth cowls for my sport 40 and want to leave it the entire length and not cut it 6" from the transom like some do..

I have seen many guys use the whole length like i am going to do but i want to know what you guys are using to stiffen up the rear portion that is very flimbsy.

I spoke to phil today and i forget what he said to use as far as thickness of plywood to epoxy to that area .should have written it down but i would think a good quality 1/16"or 3/32" would be fine.

Terry

 

[bsmtboy2]

use 1/16th ply and you will be fine. Make sure you leave about 1/18 in clearance from the edges of the cowl to keep the fit to the hull flat.

 

[SayMikey]

use 1/16th ply and you will be fine. Make sure you leave about 1/18 in clearance from the edges of the cowl to keep the fit to the hull flat.

Carbon fiber also works good. Just one layer works fine

 

[larcor69]

glass in some carbonfiber cloth, or a sheet of carbon fiber, I need the same for my 82U55 hull!!????

 

[SayMikey]

glass in some carbonfiber cloth, or a sheet of carbon fiber, I need the same for my 82U55 hull!!????

Id recommend cutting it or you will be Phils new found friend. I lost 3 cowls that way. With the rear 5 inches cut off you have a blow out panel that will keep the cowl in one piece. Also you need to move the mounts up as far as you can........

 

[Dan Hydro]

not sure what direction Terry is going about for the strut, but I believe the strut will be on the transom, yes I know it may limit where he can race at.

unless he does it the other way.

1/16th ply sounds good terry.

Dan.

 

[P THOMAS]

glass in some carbonfiber cloth, or a sheet of carbon fiber, I need the same for my 82U55 hull!!????

Id recommend cutting it or you will be Phils new found friend. I lost 3 cowls that way. With the rear 5 inches cut off you have a blow out panel that will keep the cowl in one piece. Also you need to move the mounts up as far as you can........

MIKEY.. I was going to say you should know best I have sold more cowls to you than anyone HA.

Some 1/16 ply strip about 1 inch wide in the rear would work, may have to cut away the loy where the cowl latches sit. If you really want is stiff add some1/16th ply strips about 1/2 high and box it in.

 

[gooycheese]

As far as I can tell based on the rule book regarding strut placement, No the strut cannot be placed on the transom.

Section H

Nitro Special Classes

Sportsman 40 Hydro (Sport 40 Hydro)

7. No part of the strut may protrude behind the transom of the boat, or have a width

greater than 9/16 inches or a length longer than 3 inches.

Paul

 

[Wesleys Custom RC]

I and my son have 2 boats with the stealth cowl. I just attach the rear of the cowl to the transom. I have had a few come off but never broke one in many years of racing. I did cut one in half with my own boat once

 

[Dan Hydro]

its all good Paul,

I have checked with Terry and the strut will be coming from the bottom.

Dan.

 

[tmunn]

I decided to go the plywood and full cowl route and see what happens.It's nice and strong and yes it may break ahead of the reinforcing we'll see.

Thanks guys