In the fabrication world, it would be called a riser. The ski-boat hydrofoil world uses the word T-bar.

People use hydrofoils on windsurfers. They can't have two different parts with the same name, mast.

I don't think it is a mast (like in sailing or windsurfing) or a keel. It is a riser.

Your distortion of the whole picture is amazing.

If it was so easy and inexpensive as you say, then why do people pay so much for these problems?

http://carafinouk.com

How many metal hydrofoils have these problems?

Personally the best technical advice i have to offer is: GOOD, FAST, CHEAP. -Pick any 2 carry on kids. Excellent advice! And just for a reference here : If a Metal foil was Better, then the AC-72 would have use metal instead of carbon. Each team had a 100-million dollar budget, and could afford Any...

Good point Frederik! I would add that metals are easier to work with if you already work with metals or know someone that does. Also, the mess and toxicity of resin is a huge negative for some. I am a firm believer that there is a place in this market for a low cost aluminum hydrofoil. The T-bar is ...

Don: The Titanium front wings were tested first without anhedral, they were very unstable, after adding anhedral, they are performing better than the MHL Lift wing. the frontal area is reduced to 1/3. very smooth and vibration is less than the MHL lift wing. The limitation right now is the flexing ...

Thanks Jaros. I imagine a sheet metal wing will work quite well other than being a bit more prone to stalling. I wonder if the long wing on the AquaSkipper could be used a rise/keel/t-bar or whatever that part is called. Does anyone know the length, width, and wall thickness of an AquaSkipper wing?

Nice work Hawaiis. Thanks for sharing your R&D. Have you had more time on your metal wing yet. It sounds promising. Any vibration issues yet? With regard to building a riser/keel, I imagine an easy and low cost solution would be a hollow aluminum extrusion in a NACA shape. The problem is finding an ...

6Al 6V-2Sn could be as high as 175,000 psi yield with the right heat treat or as low as 142,000 psi yield if annealed. Definitely stronger. http://www.matweb.com/search/DataSheet.aspx?MatGUID=03255c8041654cd592d13c243e0d27da&ckck=1 http://www.matweb.com/search/DataSheet.aspx?MatGUID=e217de20d5d248d9...

Titanium is stronger then aluminum for a given mass. That depends on the alloy and heat treatment being compared. http://precisionarmament.com/tennalum-7068-aluminum-alloy/ https://online.kaiseraluminum.com/depot/PublicProductInformation/Document/1033/Kaiser_Aluminum_Alloy_7068_Brochure.pdf http://...

Doubling the signs does not improve strength as much as one thicker piece. 7075-T6 (65,000 psi yield) is better or 7068-T6 (95,000 psi yeild) is best for aluminum. In fact, 7068-T6 is almost as strong as aircraft grade titanium. If using titanium, there is a big difference from pure titanium (40,000...