My vertical foil has now been fully bonded together, and is ready for trimming to shape (hence the holes you can see in the photos). My target weight for the vertical has been achieved with it coming in at 1.524 kg, before trimming.
Assuming the material that is yet be removed will equal the weight of the glue and carbon that is to be added when bonding the horizontal to the vertical, I have achieved my 2.5 kg target weight, and I think that I have increased my foil stiffness by 4-5 times my current one.
The difference between this foil and my current one should be the moth equivalent of bolting on twin turbos.
Posted in: Foil Construction | 6 Comments →December 31, 2008
January 1st, 2009 at 9:09 am
Hi Bruce,
really a nice site. I`ve also a CNC router and we (Harald Steiner ,see german homepage and I )have also built our moulds in MDF. Are you interested in sharing the rhino files? because we are always looking how we can improve the performance of the foils. Do you use a flap,i can`t see one on your pictures.
On our Foils we are using them , but now we think it would be better to make the foils without flaps ,may be it would be better to ajust the complete foil.
What do you think
Greetings Christof
January 1st, 2009 at 9:14 am
Hi Christof,
Yes a flap is next on the “to do list” for this foil. We have tried a flapless, adjustable foil and the flap works better. I think that you will have problems with a fully adjustable foil under load at high speed, as well as during the “state change” from “take off” to “flight”
January 3rd, 2009 at 6:42 am
The adjustable foil is perfectly do-able, but it needs to be engineered properly. That is why most people fail in the attempt.
January 3rd, 2009 at 9:41 pm
The adjustable foil has great advantages in my opinion.
You can find the correct foil angle without removing the foil and bonding again and i think the efficiency is much better.
Karl do you have congrete ideas to to realize it?
January 5th, 2009 at 7:15 am
I am talking from experience, not opinion or theory when it comes to adjustable AOA. We have a foil in the club that has adjustable AOA, built by John Ilett.
January 6th, 2009 at 11:41 am
Bloody nice looking foil Bruce.