32 inch F1 Tunnel build: Cozy F1 T800

[Dirk Jan]

Time for another build log of a F1 tunnel hull. I designed and built the Cozy F1 Tunnel 7 years ago already. The build log can be found here:

https://forums.offshoreelectrics.com...nel-wood-build

This time I designed a 32 inch hull. Setup will be 6S with a 3674 SSS 1650kV motor and 120A esc.
It will be an outboard setup with TFL large leg.
Speed estimate / goal is 55mph.

I took my experience from the Cozy F1 into the T800. The sponsons are wider and have less angle, to improve cornering. The hull and sponsons have a seamless deck and the tunnel has a lowered bottom, just like the real F1 Tunnels.

The hull I designed in Autodesk Inventor. I plotted the drawings and started to cut the ribs.

First update:














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[Dirk Jan]

And some more pictures. The build is much further already, so I will do a recap here, with frequent updates [emoji3].













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[autolex]

Beautiful work! I love all of the detailed pictures. I too have some inventor experience (now use revit for work).

looking forward to the build!

[Dirk Jan]

Thank you Autolex!

Here's the next update.

As mentioned in the first post, the build is already in advanced stage. The boat hit the water successfully already [emoji3]
I need to make some minor updates on the drawings, before I will share them for free!

Starting the mid section with bottom extrusion, for a lower c.o.g.
The mid section bottom is made from 1.5mm birch plywood.



Using aluminium corner profiles for perpendicular angles.



Transom added, 4mm birch plywood.



Connected the sponsons temporarily to get an image of the hull!





Comparison with my Cozy F1, just under 24 inches hull length.

[autolex]

beautiful structural work! what are you using to cut the plywood?

[Dirk Jan]

Thanks! I use a hand saw [emoji6] old school style.

[lilbigmacky]

That's old school for sure. I hand cut a rigger with way less pieces and didn't want to touch a saw ever again by the end of it. Ever thought about laser cutting?

[Dirk Jan]

Yes I considered it, but I like old school / hand crafting. Also, I save some cost this way [emoji3]

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[Dirk Jan]

Next update.

Continuing the mid section. I designed one big compartment for all electronics.



Adding the lowered bottom of the tunnel:





Overview so far:





Starting with plating the sponsons:



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[Dirk Jan]

Next steps, plating the sponsons and laminating:









2 sponsons together:



Start laminating with 80gr/m2 glass weave:





Verstuurd vanaf mijn SM-G970F met Tapatalk

[Dirk Jan]

Continuing:



Laminating the electronics box:



Hull assembly so far:





Fitting the outboard leg:



Finished the steering servo plate:



Verstuurd vanaf mijn SM-G970F met Tapatalk

[Dirk Jan]

Continuing:



Laminating the electronics box:



Hull assembly so far:





Fitting the outboard leg:



Finished the steering servo plate:



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[Alfa Spirit]

Beautiful job, very clean. Congratulations.

[Dirk Jan]

Thank you Alfa!
Next updates:

Laminating the bottom. I made a rond in the inside corners of the center extrusion, by thickened epoxy.







Extending te backside left and right:









Verstuurd vanaf mijn SM-G970F met Tapatalk

[Dirk Jan]

Determine the position of the steering servo, with steering rods:



Hull overview so far. Loosely assembled:



Making a template for gluing the sponsons to the mid section:



I made a small wooden block to measure the sponson angle left and right, to be equal. The stripe on the block should align with the bottom of the angled section:



Glued and clamped together (not too tight):