Any new machines lately ?

[Fred]

Well, yes, and no  

Flaps will improve the lift Coef of any wings, up to a certain point, then, generate more drag.
Same flaps up will increase the speed up to a certain point (you are destroying lift (?) ) good for transition for exemple, to get to one thermal to another.
So, flaps are good as they  will increase your range of application, but you have to be carefull ! All profiles are not designed to have flaps.. You can add them, but the result might be worse than the remedy !
Some profiles are specifically made to have flaps, like some TP/SB for recent ones or Wortmann are made specifically to have flaps.
For a Wortmann for exemple, a serie FX xx xxxK /10 mean that the profile can have flaps (letter K), followed by the size of the flap ( size is 10% of the chord here)

And also pure lazyness ! Easier to build a wing without flaps !  :lol:  

But maybe someone will have a better explanation! Based on experience, like for the Algebra, I put 1mm of flap (barely see it moving down!) and the thing keep going up, more, and that's it, the thing won't fly, just brake !

[billscottni]

Have made a few decisions on this winters projects, so in no particular order:

KA-3 from Island model's Short Kit
Fafnir - from Vince Cockett Plan

SU25 Frogfoot PSS
Jart

and I still have a Bubble Dancer thermal model to finish!

Made a start yesterday, by making a foam plug for the Jart fuz and this will be made using the lost foam method.

[lothar4862]

Well,

I don't know, if I am right in this area here, it's a Motorglider, but some of You may remember the little wooden triangle I flew in Ireland at Joe's Cliff, Mount Leinster and on the airfield (where I met this funny britsh man named Keith). This was Horten XII.

I scaled it a little bit over the last few weeks.

See the result:



The weight is about 7 kg, Span 3,2 m. It's flying very nice and much slower than the small 2 m version.



Video of the first flights is here:

http://www.rcmovie.de/video/aa0ea4ae83e7397ec941/H-12-3200mm-

Regards

Lothar

[billscottni]

That looks incredible Lothar. You don't waste much time when you start building do you?

Hae watched several of the video's on rcmovie.de and all your models seem to fly very well.

[joe]

Fantastic Lothar! :clap:  :clap:
Looks brilliant and flies great too by the looks of it!

[Happy Days]

Lothar, which do you prefer more,…. building these planes or flying them? (I think you are a man in love with wood.)

The new bigger model seems to land better than the smaller one that I saw you fly at the flying field in Ireland. Of course, it could be that your piloting skills have improved since then. :lol:

Just changing the topic slightly Lothar. I remember you asking, while you were in Ireland, why nobody uses a bungee (elastic) to launch their models when at the slope.
I’ve come to the conclusion that it’s just tradition to hand launch.
The largest model I’ve got is 2.6mtr wingspan, and for that it’s just as easy to hand launch off the slope.(When there is plenty of wind I know it’s going to fly.) But at the Glide-In earlier this month there were some big models and nobody used a bungee, they all hand launched. Strange isn’t it? :roll:

Just as a foot note; It hasn’t rained in this part of Ireland for over two weeks! And the temperature is warm. We are told that it‘s not likely to rain for at least another week………can you believe that?

K.

[lothar4862]

Just as a foot note; It hasn’t rained in this part of Ireland for over two weeks! And the temperature is warm. We are told that it‘s not likely to rain for at least another week………can you believe that?

No, that's unbelievable Keith :mrgreen:

Well, my skills in Flying are growing a little bit. Also it's easyer to fly the big one, than the smaller one. Especially the landing is better with the big one, because it has speedbrakes. Just more comfort for the pilot.

And actually i am in love with wood. Wasting time was never my cup of tea. I try to work as efficient as possible. There's only one life as modeller I have :wink: So I don't waste my time. As we say in Germany: "Good Tools are half of the job". In the last 2,5 years I made about 8 or 9 wooden planes and my skills are now not to bad.

and Bill... every Horten goes well, if the plane is good engeneered. The aerodynamics are a bit complicated, because all functions are made with one wing.

Best Regards to the sunny Ireland

Lothar

[JohnPearson]

Hi Lothar

What a fine looking model, I wish I could build as fast as you Lothar, well done.

JohnP