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#1 jaron Apr 04, 2009 06:15 AM

UAV Flying Wing
 
12 Attachment(s)
The main goals of the UAV Flying Wing design were versatility and simplicity.

Versatility is achieved by implementing a platform design for the fuselage. All the payload like RC gear, cameras or any other electronic devices can be freely positioned on the platform. This concept eliminates the CG issues other flying wing designs may encounter. The canopy covers the whole fuselage, has no supporting function for the structure and with bulky payloads the plane can even be flown without it.

I like to make things as simple as possible and that's why all my designs are flying wings so far. The KFm3 airfoil I used for UAV Flying Wing contributes to the build simplification.

Specifications
- Kline-Fogleman KFm3 Airfoil (top steps at 50% and 75% chord)
- Wing span 1240 mm (48.81 in)
- Wing area 24.8 dmē (2.67 sq.ft.)
- Weight 430 g (15.17 oz) (including 100 g battery)
- Wing load 17.34 g/dmē (5.68 oz./sq. ft.)

Bill of materials
- 7mm Depron
- 7x3mm spruce spars
- 2mm plywood for the fuselage frame
- reinforced tape
- double sided tape for the servos
- foam contact adhesive (UHU Por)
- epoxy glue (Araldite Rapid)
- 2 1mm steal push rods
- 2 control horns
- 30 x 400mm Velcro to mount the electronics
- 8 neodymium magnets for the canopy lock

Tested motors
Turnigy 28-26B 1350 Kv, 8x4 folding prop, 120 W, decent power
Turnigy 28-30B 1050 Kv, 9x5 folding prop, 150 W, good power
Turnigy 28-36 1000 Kv, 10x6 folding prop, 200 W, plenty of power
Turnigy 28-36 1200 Kv, 9x5 folding prop, 220 W, plenty of power

Electronics
- Master Airscrew 7x4 propeller (or an 8x4 folding propeller)
- TURNIGY Plush 25A ESC
- Rhino LiPo 3S1P 30C 1050 mAh
- 2 x HXT900 1.6kg/cm servo

Building Instructions
The attached PDF file is a draft and it is more a script for a future build log than a real building instruction.

Settings
- neutral (level flight): elevator 6mm up
- elevator up max.: 19mm
- aileron up max.: 19mm

Design tools I used
- ProgeCAD 2008 Smart (free AutoCAD clone) [now progeCAD 2009 Smart]
- Google SketchUp (3D modeling)
- WinLaengs4 (CG calculation)
- Drive Calculator (power system calculation)


An aerial video filmed with a Toshiba Camileo S10 (1080p, 119 grams).

Aerial Video - Central Switzerland (3 min 39 sec)

#2 MadDuc Apr 04, 2009 09:36 AM

Looking good Jaron! Thanks for sharing the plans.

Any flight videos yet?

#3 jaron Apr 04, 2009 02:29 PM

You're welcome. The plan is incomplete but I thought it might be interesting though.

No flight videos yet. I'm still looking for a camera that shoots decent videos before I publish them.

#4 j4ck4 Apr 04, 2009 09:00 PM

Jaron

Have you seen the AeroCam over at yardbirdrc, it looks like it does a pretty good job if the videos they have are unretouched.

#5 jaron Apr 05, 2009 02:08 AM

What I'm looking for is a camera with a higher resolution and a better lens. The AeroCam might be better than the FlyCamOne but it looks like it's in the same class.

#6 Beemus Apr 08, 2009 07:52 AM

Any chance of a build log? I have been looking for a good camera mount to try my hand at this and I love your design....Beemus

#7 jaron Apr 08, 2009 08:52 AM

I haven't planned a build log because I haven't crashed yet...

With the 1:1 PDF plan it should be possible to build the plane. It really isn't that hard because the wing is just three layers of foam glued together. The fuselage is bit more complicated but basically it's six pieces of plywood with some foam glued on. But of course there are a lot of unknown details...

I haven't posted this design in the Scratchbuilt forum yet but I plan to do so. If there are other people interested in the UAV Flying Wing I'll consider to do a build log.

#8 Daddy-O Apr 08, 2009 01:23 PM

Jaron, How much dihedral did you put in the wings? It looks like a good platform for AP and video. Congratulations.
Daddy-O

#9 jaron Apr 08, 2009 03:09 PM

There is no dihedral. What you maybe see in the first picture is the wing flexing because it's sitting on the winglet.

I have no comparison to other planes because I've never flown one that I haven't designed myself. My wings fly quiet stable and precise but maybe a plane like an EasyStar might stabilize itself better.

#10 TxDragin Apr 09, 2009 07:41 PM

Quote:

Originally Posted by jaron
I haven't posted this design in the Scratchbuilt forum yet but I plan to do so. If there other people interested in the UAV Flying Wing I'll consider to do a build log.


Hello Jaron. Uh yeah. I want plans and a build log please? I finished a 28" Slofly last week and am wanting to build a wing. Yours looks like what I wanna build. Instead of plywood I am going to use solid foam. I lucked into a big piece of just the right stuff. I am having probs opening the PDF but I will update Adobe. I really like that wing.

#11 Speed Stick 3D Apr 09, 2009 08:04 PM

Wow, I really like that wing... I think I am going to build one for FPV gear :)

Thanks,
Devin :D

#12 Fallengod Jun 02, 2009 09:02 PM

Quote:

Originally Posted by jaron It really isn't that hard because the wing is just three layers of foam glued together. The fuselage is bit more complicated but basically it's six pieces of plywood with some foam glued on.[B
But of course there are a lot of unknown details...[/B]


Can you point out what missing details that not in the plan so I can make adjustments accordingly. I'm planning to build this plane as my first scratch build, but I'm perfectly capable builder and can follow a plan.

#13 jaron Jun 03, 2009 01:14 AM

Every required piece of foam and plywood is drawn in the plan but there are no building instructions. And sometimes you need two pieces like for the winglets and the canopy side but only one piece is drawn. That's what I meant with "But of course there are a lot of unknown details...".

Basically you'll find the parts you need on the right side of the plan and on the lower left side are the three layers of the wing and the fuselage shown.
Have a look at the pictures in this post about how to fold tho bottom and the top wing layer.

I haven't had the time yet to do a build log or to improve the plan. In the meantime just ask me for details.

#14 Flipper_118 Jun 03, 2009 02:21 PM

Jaron,
Beautiful wing you have created. I hope you dont mind as I am just finishing off my wing which was built around your design. I found the PDF contains every measurement you need and I only altered some canopy dimensions to better fit the equipment I will be installing on mine (also another experimental UAV).

I will post some pictures once I complete the build. Hope to have it flying the in next couple days.

Curt

#15 jaron Jun 06, 2009 01:06 AM

Curt, I'm looking forward for the first results of your build. What autopilot are you going to use?


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