|Mar 10, 2012, 06:09 PM|
BajiWing: Flying Wing using "Armin Wing" technique
*** june 25 2012 EDIT ***
*** Seeing how bajiWing unexpectedly got 10k views and 11 pages, ***
*** I decided to add links to notable ideas at the end of this post ***
First of all, huge thanks to Ed and Nick (ExperimentalAirlines and schraut5 on youtube ) for their ideas and designs and most importantly inspiration. And to everyone on rcgroups for sharing info/ideas and insight.
Maiden video. I suggest watching in HD on vimeo page.
And here is a short video showing some details, hopefully my accent won't make it too difficult to understand, feel free to ask any questions.
Hopefully someone will find this helpful
Alternative wing template by Rob Mackenzie, thanks!
MiniBaji 34" version
flew well but I drowned it after 20 min
Same concept, with some tweaks.
Pics and details here
BajiJet 34" version
Another variation using similar techniques. Check page 6 for details
*** Useful links as of june 25 2012 ***
Some concepts for a wing with fuselage
Wing with a wide central sectionfully equipped for FPV
Wing with extended and reinforced fuselage, very hard to destroy. Trust me I tried my best
Nicely done 40" wing template and build videos 1, 2, 55" version and a great build video!
Lighter version of 30" wing without pink foam and undercamber airfoil "1","2" and a foam formed battery cavity HERE
A way to mount a servo with possibility of replacement/removal
Very simple and very light landing gear idea
A very light KFm2 version of 30" wing created for night flying.
ImagesView all Images in thread
|Mar 10, 2012, 07:43 PM|
Armin Style Wing Design, more or less
I am thinking the idea of using 3/4" insulation foam board is a good one, but I am curious why the carbon fiber parts weren't put against, or in the pink foam spars? Maybe it was easier to just put them across the wing. I have been kicking around the idea of making a 60" wing, or a bit longer with parts from Pan fish fishing poles (Walmart) that are a carbon fiber product. The poles come in 8', 10', and 12' lengths, if all the sections are telescoped out. Each section is tapered to jam into the smaller end of the larger piece, so if you buy two poles priced from $8 to $12, you have a pair of matching spar sections. The carbon fiber tubes are very strong, and likely stronger than I will need using the lightweight skin and foam ribs/spars. For a longer than 60" wing, I will have to use the Blu-core fan fold foam (1/4" thick). First I will have to make sure the long wing will fit in my small truck, or come up with a simple assembly method once I get to the field.
I have noticed a number of assembly methods, mostly tube in a tube, for the larger RC flyers. As long as a center section is used to mount both halves of the wing to, it seems like a straight forward process. One of the interesting concepts is if you can build a flying wing, you can use the same process to add a fuselage and other parts for just about any aircraft type one can imagine. Cold rolling thin foam is such a simple process, it makes sense to build large, lightweight flyers using thin foam. I am very impressed with the larger C-10 and P-40 projects and how they can float about using very little runway for take off and landings. What folks are able to do using thin foam instead of card stock from enlarged scale paper airplane plans is very impressive to say the least.
|Mar 10, 2012, 08:25 PM|
I have some carbon arrows for larger builds, or for builds that will come apart for transportation
And yes, you are absolutely right, as long as center section is separate from both halves you can make a folding wing, or use it on any other plane or build almost in any configuration. As a matter of fact I'm experimenting with modular design right now .I had a separate thread where I made my first experimental build, but it was kind of ugly and awkward looking, but I did learn a lot from it, and will be creating a modular flying wing in the nearest future. Imagine Flying Wing with detachable fuselage, easily adjustable CoG, easier launch and maybe even a wheel down the middle for landing
|Mar 10, 2012, 09:08 PM|
Hi templton and Ed
I would like to blame you now for increasing my work load
This is amazing and now I am itching to make this wing and fly it
Thank you so much gentlemen for opening new avenues of Rc design and development
Mosaic - Florida
|Mar 11, 2012, 08:37 AM|
This is AWESOME! Just what we needed for swept tapered wings for all needs, but it turns out especially nice for the straight-up flying wing here.
On the template overlay view, could you possibly scale up the wing until the angles all intersect foamboard edges, and then advise the measurements from the corners of the foamboard to the necessary fold lines and cutlines? I'm just thinking some cavemen like me might be able to more easily trace the outline without an actual template or protractor.
Thanks bro, nice job!
|Mar 11, 2012, 09:10 AM|
|Mar 11, 2012, 01:16 PM|
Took it out for a spin this morning, can't get enough of this plane. Windy as hell, but that didn't stop me from taping my old goPro to it
With gopro adding weight to the bottom of the plane and with winds ~20-30mph at high altitudes it was gliding forever.
|Mar 12, 2012, 01:23 PM|
Canada, AB, Olds
Joined Apr 2011
ExAIR asked "On the template overlay view, could you possibly scale up the wing until the angles all intersect foamboard edges, and then advise the measurements from the corners of the foamboard to the necessary fold lines and cutlines? I'm just thinking some cavemen like me might be able to more easily trace the outline without an actual template or protractor. "
This isn't exactly what he had in mind but it is as close as dammit is to swearing... and it does (almost) fit in this orientation on a 20x30 foamboard sheet.
Click to enlarge thumbnail:
|Mar 12, 2012, 03:49 PM|
When I get back from work today, I will post another version of my template, that requires simple measurements instead of protractors. It will give builders another option, since I aligned it differently.
By the way if you'd like I can attach your template to the first post and give you credit for it.
Also I am happy to report that this wing survived ~ 20 flights at this point, and 20 landings on different surfaces, some of which were far from smooth.
Also I crashed it twice because I don't like to sit home on windy days. Once during launch against concrete runway and once in a dive on a football field.
The first time servo popped off - new piece of double sided tape fixed the problem. Second time motor+gift card ripped out.
Both times I was able to get back to flying within 5 minutes.
by my Calculations Average speed is ~ 65mph
I'm planing on buying a high speed, high torque motor and downsizing the propeller and making a second wing just for those windy days at AMA field. 500-600 watt setup should bring me closer to 100-120mph.
|Mar 13, 2012, 11:42 AM|
I work at a company named BajiBot Media, we have an office dog, black Shiba-Inu named Baji, we jokingly call our boss BajiKing, and anything that has a Bajibot sticker on it (like my plane) automatically acquires name Baji-something
I've been a little busy, but I filmed another video showing off details. Need to edit it a little and upload. Also I'm modifying this wing for higher speeds, with a good motor and smaller prop.
After I figured out good a spot for the battery and found my perfect CG, I decided to put the battery inside the wing.
Currently I get ~60mph out of it, the goal is to get go slightly above 100, it tracks really well at full throttle, so I can't wait.
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