I'm guessing the stabilizers can provide upward or downward lift depending on the AOA ... but surely the front wing always creates lift - without that the hydrofoil wouldn't work. You are wrong... ;) The Front wing lifts but the back wing always pushes down - "downward lift" as you called it. But t...
[/quote] So, why do almost all foils tend to be thin and have less camber? [/quote] I think your calculation is incorrect :-) There should not be much difference between 10 and 12% Each profile has an optimum 'design' Cl which is primarily driven by chamber. You should chose a profile with a camber ...
You can see the difference in profile drag in the XFOIL plots in XFLR. DAE51 has a lot of camber. AoA at -3° is not ideal. It will have high 'profile' drag at high speed (low Cl). Try run your simulation with a different section? Even a basic NACA2410 would be better? There should be a difference at...
Modern airplanes are optimised for saving fuel at a very specific cruising speed. Our hydrofoils need to work in a much wider range like takeoff, upwind, downwind etc., even working both ways (positive and negative lift) I guess the overall benefits are smaller. I like winglets because they are a bi...
Carbon fibre come in many different grades. Just stating High Modulus is NOT enough. Roughly speaking, the grades have similar strength, but VERY different stiffness and price. Stiffness is in the range 235GPa to 900GPa for the fibre only. The most cost effective is PAN based, with a stiffness of up...
I have attached a photo of my CL828-68 setup :-) Keep it simple :-) Thanks for sharing Bohme! I wonder how you tied this pulley on a "no spliceable" rope https://i.ibb.co/cLLWNBK/Pulley-Large.jpg The rope has a dynema core suitable for splicing. The cover is removed at the cleat end (this end does ...