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View Poll Results: What forum should the build thread for the Horten VII in?
Leave it here in Giant Electric Planes. 26 72.22%
Move it to the new Nurflügel forum. 10 27.78%
Voters: 36. You may not vote on this poll

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Old Nov 27, 2011, 12:47 AM
Designing something...
United States, CA, Cameron Park
Joined Jan 2004
1,651 Posts
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2.4 Meter Horten VII

Well I'm well in to my 4.1 meter Horten IIIe build so I though I start doing some CAD work on a new project.

At this point the plan is to use E-Flite 25-46 100 degree rotating retracts for the main and two Exceed RC Rocket 3520-1050 KV motors running two 4S LiPo packs.

As I figure out more I'll make additional posts.

Here are some Horten VII links:
http://www.twitt.org/Farnborough_04.html#top
http://tanks45.tripod.com/Jets45/His...oVII/HoVII.htm

Here are some links to other Horten VII builds:
http://www.dfwt.nl/index.php?option=...mid=28&lang=en
http://www.modelbouwforum.nl/forums/...orten-vii.html
http://thermik-board.de/nurfluegel-f...ehig-t420.html

Here is a smaller kit that is currently available:
http://www.nurfluegel-modelltechnik....h7_mini_e.html

And here are some pictures...
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Old Nov 30, 2011, 11:11 AM
Designing something...
United States, CA, Cameron Park
Joined Jan 2004
1,651 Posts
So is there any interest in this plane here? I guess I can post in the Flying Wings or Scale Electric Planes forums.

Brian
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Old Nov 30, 2011, 11:59 AM
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Ducky22's Avatar
Canada, ON, Mississauga
Joined Apr 2011
356 Posts
I am very much interested in it. If you do plan on moving it to another branch, please let me know.

Thanks.
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Old Nov 30, 2011, 01:09 PM
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matthew73's Avatar
Melbourne, Australia
Joined Oct 2008
297 Posts
Very interested. Keep us posted. Cheers.
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Old Nov 30, 2011, 03:13 PM
Designing something...
United States, CA, Cameron Park
Joined Jan 2004
1,651 Posts
More progress on the CAD design

I've managed to get some more work done on the CAD Design. The basic wing ribs with leading edge, joiner holes and spar slots are done. Getting the spar placement right was difficult. I ended up using to 1" X 36" aluminum joiner tubes--anything larger in diameter or longer just wouldn't fit!

Next up...
Drawing the ribs and bulkheads for the center section.
Drawing the rest of the sub-leading edge parts.
Drawing the shear webs.
Drawing the flap and elevon skins.

Please let me know if there are any questions.

Thanks,
Brian
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Old Dec 01, 2011, 04:02 AM
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wizard of odd's Avatar
Australia, WA, Kalgoorlie
Joined Apr 2011
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It looks like a very interesting and ambitious project. Please keep posting.

Odd
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Old Dec 02, 2011, 05:09 AM
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Peter V's Avatar
Joined Nov 2008
131 Posts
2.4 Horten VII

Hello Brian,

interested also.

do you know this site? http://www.modelbouwforum.nl/forums/...orten-vii.html
Apart from the building and flying, at the end, there are some pictures of the landinggear

greetings
Peter
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Old Dec 02, 2011, 07:06 AM
Designing something...
United States, CA, Cameron Park
Joined Jan 2004
1,651 Posts
@Peter - This discussion is definitely a good candidate for the proposed Nurflügel forum. When that happens I'll probably move it there. Also, thanks for the link. I did know about the site. It was my second link under other Horten VII builds listed above.

Brian
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Old Dec 02, 2011, 07:33 AM
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Tennessee
Joined Sep 2003
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I hope you keep posting on RC Groups. I was looking forward to the rest of this thread
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Old Dec 02, 2011, 07:50 AM
Designing something...
United States, CA, Cameron Park
Joined Jan 2004
1,651 Posts
@Chuck - I still plan to post here on RCG just possibly under a new forum. Take a look here: http://www.rcgroups.com/forums/showthread.php?t=1547670 and vote if you'd like.

Thanks,
Brian
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Old Dec 02, 2011, 09:26 AM
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United States, CA, Marina
Joined Sep 2006
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Quote:
Originally Posted by cpdude View Post
I've managed to get some more work done on the CAD Design...Please let me know if there are any questions.
Thanks,
Brian
So I trust that you have incorporated the the twist into the model at this point. When laying out the spar caps, do you twist them along with the chord or leave them vertical?

Kent
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Old Dec 02, 2011, 09:41 AM
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United States, IN, Indianapolis
Joined Dec 2005
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I am curious about the REAL aircraft's Props.

What is the purpose of those small multiblade "fans" ?

Vas ist
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Old Dec 02, 2011, 09:57 AM
Designing something...
United States, CA, Cameron Park
Joined Jan 2004
1,651 Posts
Quote:
Originally Posted by Knoll53 View Post
So I trust that you have incorporated the the twist into the model at this point. When laying out the spar caps, do you twist them along with the chord or leave them vertical?

Kent
Yes, the twist [via the Nurflügel program] has been incorporated into the model. I leave the spar caps vertical--no twist!

Brian
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Old Dec 02, 2011, 10:02 AM
Designing something...
United States, CA, Cameron Park
Joined Jan 2004
1,651 Posts
Quote:
Originally Posted by birdofplay View Post
I am curious about the REAL aircraft's Props.

What is the purpose of those small multiblade "fans" ?

Vas ist
That's a very good question. There is some talk about them here. If I'm reading it correctly they seem to be used to "power" the movement of the propeller blades (i.e. setting the pitch of the blades). That makes sense to me.

Brian
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Old Dec 02, 2011, 09:05 PM
Designing something...
United States, CA, Cameron Park
Joined Jan 2004
1,651 Posts
Well, I managed to get some of the items listed in post #5 completed. I'm done with the sub-leading edge parts and the main shear webs. I've started the center section ribs and bulkheads, as well as, the control surface skins, but, I still have a bit of work to do on these.

I was slowed down a bit because things needed to be moved and/or resized a bit in the center section. I moved the main gear retracts a little further up into the center section because the wheels weren't going to retract fully inside the wing. This in turn meant I needed to reduce the size of the wing joiner tube from a full 1" to 7/8".

I also had clearance issues between the prop shafts and the front wing joiner tube. Reducing the side of the joiner tubes helped but in the end I had to make a slight change to the angle of the prop/prop shaft. I did this by moving the motors higher up by about 4-5mm while leaving the center of the propellers in the same position.

On a positive note. I did managed to complete the design of all main wing panel ribs including all of the lightening holes and alignment tabs.

I just need to remember that two steps forward and one step back is still forward progress.

I'll try to post more pictures later.

Brian
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