glass layup

Hi, I've just bought a mould for a 10' pram dinghy. I am experienced in wooden dinghy construction and am looking to try out a glass number. Can anyone advise on the correct weights of cloth to use and suggest how many layers etc.?? I envisage around 6 hp. outboard and a max load of around 450lbs gross. I will be laying up with polyester resin. Cheers all.
conyermud

 

Glass lay up ?

Hi have you had any reply's as to the glass to use ?

 

layup

hi, no, had no replies as yet, thanks for your interest.
Gordon Inwood

 

What is the breadth? Is it a flat bottom or is there some amount of deadrise? I will try to run some numbers for you.

Rx

 

layup...

Hi, thanks so much for the offer of help. The mould is around 48'' wide at the lowest chine, it is a very shallow vee, noticeably rockered along its length. Do you need anything else??
conyermud

 

A simple lay up for a dinghy
1 -GEL COAT ALL OVER 2 COATS IF BRUSHING
2 -1 450 GRAM CSM TO COVER GEL AS THE FIRST SKIN
3 -1 450 GRAM CSM + 760 GRAM WOVEN CLOTH OR A FABRIC OF THE SAME WEIGHT ALL OVER . OVERLAPS ALONG THE CHINE AND ALONG THE LENGHT OF THE KEEL . DO THE BOTTOM FIRST AND LAP THE TOP SIDES AND TRANSON INTO THE BOTTOM
ALL OVER LAPS SHOULD BE 50MM OR MORE
4 -A SECOND LAYER FOR THE BOTTOM ONLY -1 CSM 450 + ANOTHER WOVEN MATT TO FINISH
WOVEN MAT HAS A 150GRAM SCM ON ONE SIDE SO MAKE THE CSM FACE UP WHEN YOU LAY THE LAST ONE .
THE TRANSOM NEEDS PLY TO HOLD THE OUTBOARD .
WILL GET BACK TO YOU WITH THAT ONE

 

layup..

You star.. thanks so much for the help. I can start working out areas and getting a buying list together now!!
Conyermud

 

Woven matt has a 150gram csm on one side ,this saves time and resin when doing a series of layups .
Stitched fabrics are inclined to shear between the glass layers under hard impacts
The transom need to be strong with a finished thickness of around 40mm +. It needs to be robust enough for a 10 hp outboard at least . Build it strong so it will last the distance . Never underbuild a small boat