Author Topic: Horten XIV building thread (Read 36682 times)

lothar4862 · « **on:** August 26, 2009, 21:08:09 PM »

Hi out there,

as promised, I start a little picture thread about my newest Horten Nurflügel (flying-wing) project.

The Horten XIV (14) glider was designed by Reimar Horten in the beginning of 1945. His Idea was to build a clubglider based on the HIV high-performance wing. I made a little research about the real plane. There is omly a little sketch in the book "Nurflügel" (R. Horten/ P.F. Selinger) and some drawings of the center sektion at the Nurflügel-Archiv at Mr. Uden.

The Scale will be 1:4. This makes a span of 4 m with about 5 kg. The aerodynamic of the model is designed by Uwe H. and Andrès C. at www.ig-horten.de.

So here we are. First of all I made a drawing of the wing:

Afterwards I imported the profiles to CAD and made the drawings of the ribbs. Well, this is a longer story. Especially the unusual Center-section has it's geometric problems...

That's, how it looks on my computer:

After some weeks of CAD, it's time for the milling maschine to get busy.

Here is the result:

Regards

Lothar

lothar4862 · « **Reply #1 on:** August 26, 2009, 21:14:34 PM »

Hy friends,

the last days I started building the center sections. There will be two of them. Of course one built as scale as possible for me, have a look here:

and, because I have no slope and don't want to depend on a tow, an "experimental center-section".

This one will get a motor with a pusher-prop. So I can learn to fly this plane in my area, somebody from Argentina called it "German Pampa" :wink:

Regards

Lothar

Fred · « **Reply #2 on:** August 27, 2009, 09:12:07 AM »

:clap: Looking really good Lothar !

Alan_Perse · « **Reply #3 on:** August 27, 2009, 13:46:18 PM »

That looks great Lothar :clap: :clap:

. Did you use Compufoil or Profili for the wing ribs?

lothar4862 · « **Reply #4 on:** August 27, 2009, 14:16:55 PM »

No Alan,

none of them. We design the wings in "Nurflugel.exe" from Frank Ranis. This program is able to export the profiles to dxf-files. With those files I draw my ribbs. Every ribb is different from all the others bcause of the not linear washout and so on.

The whole thing is complicated for me to explain it in german, so please don't ask me for this in english :oops:

Regards

Lothar

Alan_Perse · « **Reply #5 on:** August 27, 2009, 18:31:18 PM »

Quote from: "lothar4862"

The whole thing is complicated for me to explain it in german, so please don't ask me for this in english :oops:Lothar

It's Ok. I think I know what you mean.

lothar4862 · « **Reply #6 on:** August 28, 2009, 22:39:25 PM »

Hi there,

the last days I worked a bit on the Scale-center-section. My Pilot Guillermo made his first test how he will feel in the plane. The prone position is a bit new for him, but he feels ok:

I also glued the first ribbs on the building board and checked, if it compares good to the center-sections:

Regards

Lothar

lothar4862 · « **Reply #7 on:** August 30, 2009, 22:17:07 PM »

Here we are:

all ribbs are glued to the board. The spars of one wing are assembeld:

Regards

Lothar

billscottni · « **Reply #8 on:** August 31, 2009, 13:15:19 PM »

Beautiful work Lothar!

I'm struggling for enthusiasm to do any building at the moment and haven't flown at all since April.
I'm hoping to fly at Mount Leinster in September.

Happy Days · « **Reply #9 on:** August 31, 2009, 19:03:31 PM »

Lothar that is fantastic, clearly Guillermo is enjoying it as well, he looks like he's making love to it :shock: And has been doing so for many hours! (A better man than me :clap: )

This build seems to be coming on at a remarkable speed, you'll have it finished in no time!

Well done

Keith

(Er,..............you wouldn't care to build me one would you :wink: )

lothar4862 · « **Reply #10 on:** September 02, 2009, 20:45:42 PM »

Well,

today the other wing is at the same point as the right one was on the last picture. So all spars are done. The worst job on every wing for me is to make boxes with the spars to get real strong beams.

So I decided to plank the upside of the right wing first.

Here is the result:

The weight of the wing is now about 950 gramms. I hope not to come over 1500 gramms with all servos and the rest of the plywood-covering.

@Keith,

I am so sorry, but this build takes a much longer time as it looks at the moment. At the beginnig it always does big steps forward, but as more I come to an end, it takes maore time. But why don't You build an own projekt?

@Bill,

may be this here is a bit motivation not to struggle but to build??

Regards

Lothar

Happy Days · « **Reply #11 on:** September 02, 2009, 21:40:38 PM »

Another very good development in your build, Lothar. :clap:

I'm in the process of building a model. It's another Phase 6, like the model you saw me flying the first time we were on Mount Lienster with Sabastian and Alexandar.
The new Phase 6 will have a "Full House Wing," unlike the first one which only had ailerons.
I'm hoping to have it finished for next weekends Fly-In on Mt. L.

Just hope the weather improves. It's rained almost every day for the last 2 weeks :cry: (May be I should move to Spain :wink: )

K.

lothar4862 · « **Reply #12 on:** September 08, 2009, 19:30:25 PM »

Here we are:

both wings are ready covered on the upper side. This allowes to put the whole plane together and make "beauty-pics":

Now I have to save some Euros for servos and other stuff, before I can clos the other side.

Regards

Lothar

Alan_Perse · « **Reply #13 on:** September 08, 2009, 19:56:59 PM »

Wow. That looks beautiful, well done :clap: :clap: . It's a shame you will have to cover all that lovely woodwork.

Happy Days · « **Reply #14 on:** September 08, 2009, 20:44:44 PM »

Saving the Euro’s is easy Lothar.

You just tell Hedi that she must not spend so many euros at the shops! :lol:

You will have your servos by next week! It’s as simple as that.

(Of course,…..you might also be divorced by next week

)

News:

Author Topic: Horten XIV building thread (Read 36682 times)