While the flying fins board is getting repaired the ground effect thingoe is on the back burner, so I've been concentrating on fins.
Basil has come up with some end grain balsa and I've lashed out $50 on a 5mm x 50mm stainless bar.
So I'm trying something a bit different, but have had in mind for a while, and Basil is the guinea pig.

Basil has cut the balsa to 6mm thick, I'll laminate 2 of them together with glass to make 12mm. This will allow me to shape it without it falling apart at the edges.

I started experimenting with cutting/shaping the stainless today.




I'll get 3 15mm wide pieces out of the 50mm. I'm copying the fin above, as it works well for me with my 5.8 and Basil is about the same weight as me, and wants it for his 5.8.
So I've marked the 5mm thick line on the leading edge of my fin, and copied that onto the stainless. The next trick was to make a 1mm rebate just behind this line. This will allow the carbon/glass to butt up against the stainless at full thickness. So the extremely thin layer that otherwise would be there doesn't flake away.
A mate has given me some milling machine tools to try in the router, good idea but I couldn't get it to work. The tool got too hot and didn't cut very well, so I tried the good old right angle grinder, with much more success. Used a 5mm thick disc to make the rebate and a 1mm thick disc to cut to shape. I'm leaving it attached to the main rod so I can clamp it easily for shaping the leading edge. That's tomorrows experiment.

Nice work Mike

If you spilt balsamic, on Basil's balsa fin, would Basel pulse be ballistic, because of bitter blowback.

Better build a balsa board for Basil, because brother you are balking. Ground effects are brilliant, but begging to be boosted, from burgeoning back burner.

Bag me for bear bating, but I am battling boredom. This Breezer is betting, on binning Basil's balsamic fin.

Select to expand quote

Scoob said..
> This Breezer is betting, on binning Basil's balsamic fin.

I have a feeling you shouldn't bet too much.