mistake?

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peter-curacao
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mistake?

Post by peter-curacao »

Hi Jacques,
Sorry to bother you again but after reading building notes again I think I made a mayor mistake with the transom, thing is I used 3 layers of plywood without the clamping board now I see in the notes I need 5 layers (I always thought that was about the glass) please tell me if I made a mistake and please advice me what to do
Thank's in advance
Peter
CS 25
From memory, the ABYC standards for 250 HP specify 2.25" total
thickness (57 mm), I prefer a little more.
Most of that thickness should come from the plywood core.
Look at the nesting drawing: you have 3 layers for the transom plus 2
for the clamping board. This means 5*12= 60 mm plus glass at the motor
clamp.
What do you have?
PS: I prefer to discuss this on the message board, others will learn
from it.



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Post by peter-curacao »

I have three (3) It’s a little confusing in the notes it says Full transom no clamping board, looking at Ollie's posting I'm afraid he is going to make the same mistake (I hope he isn’t) so now what to do :help:

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Post by bernd1 »

Peter,

I'm not a designer, but I think you have to glue the 2 boards.
Let us see what Jaques recommends - don't be sad there gives always a solution.

Your boat looks so pretty - I'm sure you finish the project successful.

Bye
Bernd

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Post by jacquesmm »

The nesting drawing shows 3+2 layers.
For a full transom, you use the same 5 layers but do not cut the last 2 down to the clamping board level.

See this on page 2 of the building notes:
[quote]Note that the full transom is made of the transom 1-1/2â€
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Post by peter-curacao »

bernd1 wrote:Peter,

I'm not a designer, but I think you have to glue the 2 boards.
Let us see what Jaques recommends - don't be sad there gives always a solution.

Your boat looks so pretty - I'm sure you finish the project successful.

Bye
Bernd
Thanks bernd! I'm thinking the same I only hope I can glue those two over the glass that's already in

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peter-curacao
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Post by peter-curacao »

[quote="jacquesmm"]The nesting drawing shows 3+2 layers.
For a full transom, you use the same 5 layers but do not cut the last 2 down to the clamping board level.

See this on page 2 of the building notes:
[quote]Note that the full transom is made of the transom 1-1/2â€

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Post by TomW »

[quote="peter-curacao"][quote="jacquesmm"]The nesting drawing shows 3+2 layers.
For a full transom, you use the same 5 layers but do not cut the last 2 down to the clamping board level.

See this on page 2 of the building notes:
[quote]Note that the full transom is made of the transom 1-1/2â€

bernd1
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Post by bernd1 »

peter-curacao wrote:
bernd1 wrote:Peter,

I'm not a designer, but I think you have to glue the 2 boards.
Let us see what Jaques recommends - don't be sad there gives always a solution.

Your boat looks so pretty - I'm sure you finish the project successful.

Bye
Bernd
Thanks bernd! I'm thinking the same I only hope I can glue those two over the glass that's already in

Peter,

I would first glue the two pieces together and then glue this package to the installed one.

I think the most important thing is to prepare the surface of the inside to have a good bond.

To hold the right position during curing I would possibly use dowels - big dowels.

I would dry check how it fits and then mix the glue. Don't forget that you have to glue at a vertical piece.....gravity fighting - you know.

Have fun to glue...
Bye
Bernd

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Post by jacquesmm »

Yes tape again, fiberglass again.

You can use temporary screws to add layers of plywood from inside.
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Transom lamination

Post by OllieK »

I'm confused :doh: :help:

Page 2 of my build notes says

"The transom is made of several layers of marine plywood or better, from a sheet of hi density transom foam. The foam core is 2" thick, with fiberglass, we expect a final thickness of approx 2 3/4". Plywood transoms are made of 3 layers of 1/2" quality ply like Meranti BS 1088. If lass expensive marine fir is used, add one layer for a total of 4 layers of 1/2" ply."

The nesting diagram shows 3 sheets.

Where has the number 5 come from?

Are there some suplimentary notes I am missing?

Ollie

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