J.D. WOF 30" Tunnel build

[RobertDoak]

One more question ....
The sponson 3/8" strake formed with the lower side sheeting and body putty....
How far forward does this continue.

Also removed the rear transom outboard bay...covered the tops of the sponsons..
And working on the sponson bottoms...the right sponson has the bottom sheeting in place...I need more clamps to continue with the sponson side sheeting...so its looking like im running out of pieces of wood....yea..!!!

 

[Jerry Dunlap]

I usually run the strake 3/4 forward and blend blend into the outside edge.

JD

 

[RobertDoak]

Ok..thank you J.D.

 

[GraysonTaylor]

Looking good

 

[RobertDoak]

Thanks very much Grayson...
I like the Pay-n-Pay you have....
I think your wife is correct btw....

 

[Julio Almazan]

Hi J.D. and R.D.

usually run the strake 3/4 forward and blend blend into the outside edge.

can any of you explain me this?... Remember that my english is NOT NATIVE...

 

[Jerry Dunlap]

Hi J.D. and R.D.

can any of you explain me this?... Remember that my english is NOT NATIVE...

Hi Julio,
The outside edge strake is an attempt to create a sharp edge to prevent water from coming up the side of the sponson. Extending the side sheeting past the bottom sheeting provides method of keeping the body putty used to create the strake in place along the outside edge. I'd like to think I got the idea from looking at the outside edge strakes on vee hulls. There's also a good chance I just copied something I saw on another model tunnel boat.

JD

 

[Julio Almazan]

Hi J.D.:
Clear... absolutely clear...
Thanks.-

 

[RobertDoak]

Hello all...
Sorry about the delay in updates...
I took on a side project....a Zippkits A box Crackerbox...and need to complete by this weekend..im in the final stages of finishing so I will be continuing soon..

 

[MarkScott]

What size outboard you going to put on the cracker box?

 

[RobertDoak]

Mark....
Thats not a bad idea....may need some nose weight...the K&B 1.00 may actually be a good candidate....

 

[RobertDoak]

So its been a little while...but lets get back to building....I left the sponsons with one piece of sheeting to go...the bottom outer...this gave me some time to think about the 1/8" over hang to create the sheer that the plans show ..
Just a note...the bottom outer sheeting is short..lengthen the piece on the tip by 2"...
So after the glue dris and you did some sanding...I marked the 3/8" distance from the overhang on the bottom sheeting and positioned a straight edge 1/16" outside of that...double sided tape is perfect for this...I filled the gap with plastic wood filler....then use a piece of scrap wood against the ruler edge and along the top of the sheeting and you get nice fillet strake with very little sanding..
Allow everything to dry and sand smooth..

 

[RobertDoak]

So...the sponsons and center section are sealed and sanded...I did create a problem for myself....the center section formers....be advised to make sure these are perfectly 90° to the building surface and bottom sheeting...mine are a little off which has become a small problem joining the sponsons to the center section...I will need to do some "body work" on the center section to make it right and true...
I also trimmed the cowling...

 

[RobertDoak]

Good Morning All...
Well after the glue dried and all the clamps weights and tape removed and the cowl trimmed this is what I have So far...there is a coat of sealer but needs a good final sand and another finish resin sealing....then the fun part....prime and paint...the rear of the cowl I'm going to attempt to keep as long as possible...but after mounting the engine that may be another story...
Still need to make the radio top cover and reinforce the cowl with wood along the bottom and create an attachment point...

 

[Julio Almazan]

Nice job!!

 

[MarkScott]

Looking nice. The rear cowl will need some trimming..

 

[RobertDoak]

Most definitely....but I would like to keep the look.....aerodynamiks

 

[RobertDoak]

Well as much as I tried to conceal the engine....Mark is correct...the cowl will need a lot of trimming....
Drilled the mount for the engine.
I do have a few dents and scratches that need filling....a good 220 sand...then some filling primer...a 400 sand then into the paint booth...

 

[RobertDoak]

So its finally has some color....primer, alot of sanding then some sealer some more sanding....etc....you get the pattern right..I applied 3 coats of sandable primer and started a "guide" coat but the spray nozzle clogged and that when I called it a day....I will let it dry well then wet sand with 400 grit paper..
The orange boat is another J.D. design.
A Dumas Hotshot Sprint...with a modded K&B on the rear....6" make a big difference...

 

[Jerry Dunlap]

Looking Good

JD