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New Wing Being Built - So Far Unnamed lol

Posted: Tue Oct 20, 2020 10:32 am
by Derek
I was looking through my parts bin, a while back. WOW! I have LOTS of spare parts. Some are new and some are used. I noticed that I have a rather large motor. Its an NTM Prop Drive 5050 500kv 6S capable. I have some rather large metal gear servos with 15kg of torque at 6.0v. I also have a spare FrSky L9R receiver, Matek F722 Wing FC, Runcam fpv camera, TBS Unify Pro vtx, and a small GPS module (without compass). I also noticed that I have some 3/4" insulation foam sheeting, from a previous build.

Let's build a 50" fpv wing that will run off two 6S 4000mah lipos in parallel! Sounds like a good idea to me! I did order some carbon fiber arrow shafts to be used as wing spars and I used 3 of them to create an A frame spare that is buried in the foam and glued with Gorilla Glue. I don't have any pics of that but here come some pics and some descriptions.....

Here are the new spars
New Spars.jpg
New Spars.jpg (3.43 MiB) Viewed 6082 times
This wing is 3/4" insulation foam sheeting with 3 layers, to create a Kfm4 airfoil. It's rigid and efficient.
Pieces being assembled.jpg
Pieces being assembled.jpg (3.83 MiB) Viewed 6082 times
.....more to come later on..

Re: New Wing Being Built - So Far Unnamed lol

Posted: Wed Oct 21, 2020 8:29 pm
by Graham Lawrie
You can call her Run Of The Arrow:) and when she crashes, after the film with John Travolta, Broken Arrow:)

Re: New Wing Being Built - So Far Unnamed lol

Posted: Wed Oct 21, 2020 11:04 pm
by Derek
That was a pretty good movie LOL

Re: New Wing Being Built - So Far Unnamed lol

Posted: Wed Oct 28, 2020 8:01 pm
by Derek
In the following pic, I had glued the layers together and I had cut some scrap foam that would be later sanded into shape for the final nose shape. I added a pop can for size reference
20201001_135456.jpg
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In the next pic, the glue had cured and I sanded the foam at the nose into the final shape. Looks pretty good!
20201002_133412_HDR.jpg
20201002_133412_HDR.jpg (4.67 MiB) Viewed 6063 times
Here, I added some balsa wood that is shaped very well for a leading edge and it adds a good bit of LE protection and rigidity.
20201004_083543.jpg
20201004_083543.jpg (2.97 MiB) Viewed 6063 times
The next few pic was taken after some color was added. The underside is entirely red.
20201008_161506_HDR.jpg
20201008_161506_HDR.jpg (2.96 MiB) Viewed 6063 times
This pic was taken after I added a DIY bungee launcher hook to the underside. Im anticipating this wing to be kinda heavy so I will probably only use my bungee launcher to launch this wing, with the assistance of Inav.
20201011_082735_HDR.jpg
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This next pic was taken after I added some 12v LED's. I have red LED's on the top, blue LED's on the underside, and two small strips of white LED's on the underside at the nose.
20201012_154555_HDR.jpg
20201012_154555_HDR.jpg (3.3 MiB) Viewed 6063 times
Here, I was dry fitting the custom motor mount with the NTM Prop Drive 5050 500kv 6S motor
20201019_155949.jpg
20201019_155949.jpg (2.62 MiB) Viewed 6063 times
Adding the new esc
20201020_060859.jpg
20201020_060859.jpg (3.67 MiB) Viewed 6063 times
More to come......

Re: New Wing Being Built - So Far Unnamed lol

Posted: Sat Oct 31, 2020 2:21 pm
by Graham Lawrie
WOW That looks big and powerfull Derek:)

Re: New Wing Being Built - So Far Unnamed lol

Posted: Mon Nov 02, 2020 10:42 pm
by Derek
Thanks Graham! The wing is 50" wide and weighs 8.6lbs (with two 6S 3700mah packs). I did a full throttle watt/amp test yesterday with a 13x7 APC prop and only got 988 watts at 48 amps using an NTM PropDrive 5050 500kv motor. Although that motor would probably push the wing and make it flyable, I'm not real impressed with the output power. So, I've been in touch with some people and I've ordered a BadAss 3530 890kv motor (yes, BadAss is the brand name, lol). According to their prop test chart, this motor should put out 1900+ watts at 88ish amps with a 10x7E prop on 6S. Now that just sounds like POWER!!! I may have to modify and reinforce my current motor mount to accommodate the new motor.

I do have some more pics coming soon.....

Re: New Wing Being Built - So Far Unnamed lol

Posted: Mon Nov 09, 2020 1:16 am
by pvolcko
Cool build.

And I'm sorry but Broken Arrow to me will always be a Christian Slater movie. I know Travolta was supposedly the main (anti-)character, but Slater carried the movie IMO. :)

Re: New Wing Being Built - So Far Unnamed lol

Posted: Sat Nov 14, 2020 5:36 pm
by Graham Lawrie
True Paul he did, however best Slater movie was True Romance:)