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Old Mar 02, 2014, 04:12 PM
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Build Log
1.25 m Horten Ho IX/229

Hello Nurflugel fans. Welcome to my build thread of the 1.25 m (just over 49") span Ho 229.

Brian (CP Dude) was kind enough to send me a short kit, which he updated from Uwe's plans from Germany.

The laser cutting is beautiful, and the kit includes the flat ply alignment jigs that the feet of each rib fit into, as do his other Horten model kits.

My initial thought for fan units are the Maxx Products EPF - 50. These come pre balanced and with a Himax HB2415-4100 brushless motor installed. I have one of these in my Tuff Flight Stingray and get very good thrust and run time on a 3S 900 mah Lipo.

My goal here is not for crazy speed, but for good flight characteristics, and (hopefully) light enough AUW to hand launch. The EPF - 50 fans should be a perfect fit as their O.D. is 51.6mm and the fan holes in the appropriate center section former, #3, are just over 51mm.

This will be my 5th Horten 229 model, and I'm very much looking forward to the build. The other 4 models all fly very well, and for this one Uwe figured out a way to dispense with the exhaust tube extensions.

Ye haw, should be fun
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Old Mar 02, 2014, 11:47 PM
turbonut's Avatar
upland CA
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Cool I will be watching
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Old Mar 03, 2014, 02:18 PM
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Hi Turbonut. Were you building one of the WOTW kits, or I am thinking of someone else ?

Mark
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Old Mar 03, 2014, 05:47 PM
I don't like your altitude
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Nice one! Brian started a build in the edf forum if memory serves.
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Old Mar 03, 2014, 08:43 PM
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Check formers 1 to 4 .
Ensure that they stack (all the holes line up) exactly. They didn't initially.
F4 had angled inwards thrust tubes.
If by some weird chance the error persists.. Rebuild F4 so it fits.
Building it to be notably less than 850 gms/30 oz painted but 'empty'..sans avionics will be an accomplishment.
Gotta watch the weight constantly.
Suggest an RDS for aileron linkage
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Old Mar 03, 2014, 09:25 PM
Designing something...
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Quote:
Originally Posted by Stupot46 View Post
Nice one! Brian started a build in the edf forum if memory serves.
I guess I did. Though I never actually started an actual build.
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Old Mar 05, 2014, 05:38 PM
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Hi Mark,
Yes that is me...is waiting for me to finish my Super Mystere jet
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Old Mar 05, 2014, 08:11 PM
Ochroma Lagopus Tekton
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Blackstock, South Carolina
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A balsa Horton FW build! Yum-ee, this should be fun. Paint me 'subscribed!
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Old Mar 23, 2014, 10:06 PM
Ochroma Lagopus Tekton
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Blackstock, South Carolina
Joined Sep 2007
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I would guess that the pliers are there for weight to hold the curve from the wing surface blending to the cockpit profile while the glue cures. Not that I've ever built a Horten, just looks logical to my backyard engineering. those look like some very nicely cut parts, I hope they measure as nicely.

Did I get it right (do I win anything)?
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Old Mar 24, 2014, 12:20 PM
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Hey Fly Wheel, you are correct, yes you win a new car, psych. just kidding
You have the right idea, the ribs themselves are fine as they sit, the top spar however, needed a little weight to bend it and keep it seated fully into the rib notch while gluing.

The Ho IX really has some significant curvature on the upper surface, esp. the area of where the wing root joins the center section.
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Old Mar 25, 2014, 08:42 PM
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oops
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Last edited by Bare; Mar 26, 2014 at 10:34 AM.
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Old Mar 26, 2014, 09:09 PM
Ochroma Lagopus Tekton
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Blackstock, South Carolina
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Yeah, that's what I figured (about the plane, not the car ). I was looking for an original model for my son-in-law a few years back. He likes German warbirds and a Horten seemed a natural, so I got him a 229 short kit. It is amazingly modern in it's design.
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Old Mar 27, 2014, 05:42 PM
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Flywheel, cool - what kit did you get him? Yes the Ho 229 was really ahead of it's time and is a great looking airplane. Have you guys heard about the guy on Long Island who is trying to build a full scale version? Last I knew he was trying to raise funds/donations for the project and trying to hire people to work on it.
Horten Ho 229 Reconstruction Project - German (Deutsch) (7 min 7 sec)


Mark
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