AlexanderSahlin's Recent Activity

  1. AlexanderSahlin liked Glueandcoffee's post in the thread Rc sailrocket.

    That is true. I suppose the hull or paravane would almost certainly exceed the speed of the kite while bearing away along the course...

    Feb 25, 2021 at 3:35 AM
  2. AlexanderSahlin replied to the thread Rc sailrocket.

    You will handle the problem of unsteady kites by averaging over a reasonably long course. I suggested 100 m, but the RC-helmsman can...

    Feb 24, 2021 at 11:43 AM
  3. AlexanderSahlin replied to the thread Rc sailrocket.

    Here is a link to the speed-record for some wind-powered models [MEDIA] In dynamic soaring (a technique developed by the albatross long...

    Feb 24, 2021 at 10:55 AM
  4. AlexanderSahlin replied to the thread Rc sailrocket.

    I think we can learn a lot from the WSSRC here, they have been organising the 500 m speed-sailing world-record since 1972, and have...

    Feb 24, 2021 at 7:57 AM
  5. AlexanderSahlin replied to the thread Rc sailrocket.

    I think there should be as few rules as possible. The rules shall ensure that the model is propelled by the wind and that it is a model,...

    Feb 24, 2021 at 6:26 AM
  6. AlexanderSahlin replied to the thread Rc sailrocket.

    I am not sure I would consider what you describe as directional stability, but as the changes in aoa on the main-foil will be small,...

    Feb 23, 2021 at 4:24 PM
  7. AlexanderSahlin replied to the thread Rc sailrocket.

    Here is a link for our home-page for the paravane-speedsailer The Swedish Speed-Sailing Challenge...

    Feb 23, 2021 at 8:44 AM
  8. AlexanderSahlin replied to the thread Rc sailrocket.

    I used the same equation for lift-force as you used in Post 4. Then I assumed that the force from the sail was as large as the force...

    Feb 23, 2021 at 5:22 AM
  9. AlexanderSahlin replied to the thread Rc sailrocket.

    This is not so complicated, the foil will adjust it's aoa, so you get the cl required for equilibrium. When you start from rest, you...

    Feb 22, 2021 at 4:54 AM