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Heres my version of a Hawk
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That's some excellent drawing!! You, sir, have raised the bar. |
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ziptie and hot glue. Zipties holds it down, glue keeps from sliding
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I just had to build this. It has a 3000kv blue wonder motor, 6x4 prop on a 2 cell 800 battery. With the light battery I had to build a longer nose to make it balance right. I used the flitetest swappable fuselage method of grooving and folding up the sides of a three sided box that fit the opening between the folds, it worked slick really, and I didn't have to put any extra weight in it to balance it out. All up she weighs 12 3/4 ounces with the landing gear.
I fully expect I will crack the nose up so I just have it glued in lightly under the front and two spots along the back sides so it will be somewhat modular or easy to replace. I wasn't sure if I would cook the motor with a 3 cell battery or not since I don't have a wattmeter and they only recommend 2 cells batteries with it. I wanted it lighter so it would fly slower cause I am a noob at flying these things but I have a blast building stuff. Here's a pic |
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I guess I should have just moved the prop slot forward a little more then I could have had the nose short like your original plan and it would have worked that way but of course I cut it out first then seemed awful tailheavy so this was my way out of that oops. I'll see if I can fly it and find out how it works maybe I will do that next time. If anyone can tell me if this motor can use a 3 cell battery with a smaller prop or something let me know
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Here is my 40" build, basically ready for maiden.
I will add the electronics enclosure later once I figure out the placement of the FPV camera. I will run with the gopro recording, and a separate fpv camera. AUW w/ battery is expected to be around 36oz. |
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Big brother and little sister side by side. Looks very nice, rcbif!
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Wow, lots going on with this design! I love all the variations.
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That joins the sheets together. The seam is pretty strong. The 60" width is still floppy though, so you will need a few spars. I've flown this bird many, many times, and while I've had a couple of wing flex issues (looked like a bird with wings flapping!), there have been no issues with the seam... it has held strong with no signs of breaking. |
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The airfoil was an excellent addition to this beauty. My landings are a lot easier to manage, and it seems that she glides better as well! I use a pretty heavy 2200mah 3cell battery (on sale for $9.99 at hobbypeople...so I bought 3 lol), and so far this is my best flying build.
Has anyone tried to turn this into a tractor instead of a pusher? I've noticed that tractor setups are much quieter (for reasons unknown to me), and I don't imagine it would be too much to flip the electronics around. If you've done it, please post pics. If not, I may try it myself. While the noise she makes is one of the cool things about this bird, some of the neighbors may not want to hear all that. |
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Last edited by Swammy1979; Oct 18, 2012 at 09:39 AM.
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About the noise... you can really reduce that by changing the shape of the prop slot. The best shape depends on where the prop is vertically relative to the slot. If just the outer portion of the prop goes through the slot, then an oval works well. If the prop is centered, or close to it, the "ski mask" shape appears to be the best... see https://www.rcgroups.com/forums/show....php?t=1608266. |
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Which makes sense to me. If you blow into a fan, it kinda makes the same noise. I love the noise It sounds like a racecar going around a track. |
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