TX18 Centre stringer fit and modification

[jacquesmm]

The center stringer bottom side is straight where marked straight. It looks like you did that right.
The MW bulkhead is a little low but keep in mind that you will fine tune all the framing along the hull skin side to fit to the fiberglassed inside.
You will make it fit at that time: all frames and stringers will require adjustments to go over the multiple layers of glass.
At this point , focus on getting a straight bottom panel.

[Vundu]

The center stringer bottom side is straight where marked straight. It looks like you did that right.
The MW bulkhead is a little low but keep in mind that you will fine tune all the framing along the hull skin side to fit to the fiberglassed inside.
You will make it fit at that time: all frames and stringers will require adjustments to go over the multiple layers of glass.
At this point , focus on getting a straight bottom panel.

Great, thanks Jacques. Will do as advised. Materials arrive next week so will be ready.

[fallguy1000]

Wouldn't an inverted vee bottom need to have the MW and transom veed?

[jonnymac]

Wouldn't an inverted vee bottom need to have the MW and transom veed?

there is a stern picture in the study plan and the transom isn’t v’d.

[fallguy1000]

Wouldn't an inverted vee bottom need to have the MW and transom veed?

there is a stern picture in the study plan and the transom isn’t v’d.

Yeah, but his center stringer is 12mm too high at MW. How is he gonna get a straight panel and not vee the hull at MW? Isn't the proposal by JM to build the center stringer flat and the bottom flat impossible? I see a vee.

What am I missing?

135E07C3-9941-4491-84DA-00842F8A7A3E.jpeg (74.44 KiB) Viewed 532 times

[TomW1]

Some thing is not kosher to me also fallguy. MW may need to be cut higher or something like that.

Tom

[jonnymac]

I agree something isn’t right. to me it looks like MW is closer to the shape its supposed to be than the center stringer. the center stringer is straight for that run as discussed ad nausea but not in the same plane as the chine. the chine and the center stringer should be different angles based on the hull shape I see. I’d like to see a picture more back(so the whole frame setup and looking from stern to bow and bow to stern. I’d guess the real problem is a few stations back from here.

[fallguy1000]

Vundu-how will you deal with it?

[Dougster]

Transom is straight on the bottom. Scroll down on this link and see pic:
viewtopic.php?t=15242&start=90

Also use DaveTx's link to his blog to see more.

Dougster

[Vundu]

Vundu-how will you deal with it?

Hi Fallguy.

The short answer is I am not sure yet. I have been inundated with work, so tomorrow is the day.
I will take a few more pics tomorrow and post them.

I have checked and double checked the bulkheads and cannot find any anomalies. This is not to say I haven't missed something.

It is not possible to draw a straight line from Bulkhead C to transom, or from D to transom, without leaving bulkhead bulkhead MW low. If I lower the transom and then the side stringers and centre stringer won't fit. If I raise bulkhead MW then then I have to deviate from the centreline by 12mm, and the sole will be out by the same amount.

I can can draw a straight line C-D-MW then from MW a 12mm incline to Transom (This is what I did on the first boat).

At present, the baseline for all bulkheads is correct. The alignment of the bulkheads and side stringers is also correct. Motorwell bulkhead MW is an inverted V, the transom is a very slight positive V.

It pains me to say it, but.... the curve that is incorrectly on the plans appears to be the best fit for now

I will know more tomorrow.