|Jul 16, 2007, 09:02 AM|
Joined Feb 2006
I decide to build this plane. i haven't enough expirience in glider controlling, and thats i want to ask what profile i can chose to make this plane not very rapid and easy to control. It is not important for me to have possibilities fo 3D. What profile get the better of this problem.
What profile is good for dynamic soaring and for thermal ?
If somebody have some good drawing of Blanik l-23 please send me by e-mail
|Jul 16, 2007, 01:46 PM|
Joined Jun 2004
A really good all around airfoil is the HQW 2.5/9. Designed by Helmut Quabeck, it has 2.5% camber and is 9% thick. It is designed for use with camber changing flaps at 22% of chord, and works well in light lift and will really move out when needed, like at the slope. Camber changing really helps on the high speed end, but is not an absolute necessity. With Quabeck's airfoils, you can shift up or down on the thickness and camber to suit your needs, and it works very well. For slower speeds, you can increase the camber to 3.0%, faster you decrease to 2.0% or even 1.5% if you want to really burn up the sky! The same goes for the thickness, thicker makes for a stronger structure, which can be important depending on the type of construction you choose, and thinner will reduce drag and increase speed potential. I have used the Quabeck airfoils extensively on thermal, slope and electrics with excellent results. Quabeck unfortunately passed not too long ago, but his wife maintains a web site with lots of info ;
|Jul 16, 2007, 03:07 PM|
I think DLD have good suggestions
Myself I would maybe go for HQ 3,0-12 which suits better for slow flying and grace, but if you need speed 2,5-9 is a good choice.
For scale planes there is always one HQ-airfoil which suits your need.
|Jul 17, 2007, 08:07 AM|
Joined Jul 2007
plan for Blanik
L-23 documentation(3view, slice,specification data, history)
Which version of plane did you have it?
also i have documentation for another Czech sailplane:
VSO-10(plan model 3000x1420mm, 1650g)
Orlik II (2980x1450mm, 1900g)
Documentation for LF 107 Lunak, LF 109 Pionyr
If you have something, please contact me
I canīt still find a plans of Pilatus B4....(as well as another modern sailplane ASW,DG,Discus...)
Jay, Czech Republic
|Jul 17, 2007, 09:11 AM|
Joined Nov 2004
Hi Jay ,, My model plans of the Blanik are original from Czech Rep. , I purchased my self when I was in Czech Rep . in 2004 . PM sand about the plans of Pilatus .
Have nice day ........ Mirek J.
|Jul 17, 2007, 11:27 AM|
lots of information and plans sources at ...
plus Stephano Duranti of Profili has many free plans at his site
and another source for free CAD plans at ...
you will have to do searching and sorting but there
is alot out there for free.
|Aug 19, 2009, 12:51 PM|
Joined Aug 2009
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