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DEFIANT WINGS
United States
Registrace 15. 11. 2010
Dropping In
Dialing in a new personal build. Feeling pretty good about it so far. The walksnail Avatar HD FPV system makes such a difference. It has re-energized my love of flying FPV.
zhlédnutí: 414
Video
52° calls for a couple of D52s
zhlédnutí 209Před rokem
It was 52° so we broke out the 52s, Defiant 52s that is. Mike and I took advantage of great temperatures and low winds to get in our first flights of 2023! These were also my first flights with the new Walksnail Avatar system on a wing. All I can say is that it's amazing and makes me excited for the hobby again. Chase Wing: My Defiant52 Lead Wing: Mike Bragga's twin Defiant 52
NEFPV November Fly Day
zhlédnutí 205Před rokem
A little wet and a little cold but flying season ain't over 'til we say it's over! Despite the weather we managed some epic flights. Big shoutout to Lito for an amazing steak meal! A great fly day with all the essentials, a cracking fire, a space heater, warming refreshments, a full belly and the best group of friends!
LR-80 Walkaround and First Flights
zhlédnutí 2,5KPřed rokem
The LR-80 is the latest project under development. This is an 80" wing designed for long range/endurance and could be used for mapping or other commercial activities. This is the largest wing I have ever built or flown and launching it proved to be very interesting. 00:29 Walkaround 08:01 Launching 09:48 Flights
FeatMeet Race Gates with the Defiant 52
zhlédnutí 244Před rokem
While not designed to be a race wing, the Defiant 52 is more than capable of flying the gates and with a GoPro for some cool footage. This was flown the morning after the race and I wish I had chosen the 52 for the race. Of course, flying the course is a lot harder when their is wind, competitors and pressure! You are always your toughest competitor. Defiant 52 SunnySky 3120/1100 kv APC 10x7 4s...
RogueV4 - Pusher: Low Cruising
zhlédnutí 654Před 2 lety
I came across some flight footage from earlier this year with the Rogue v4 - Pusher. This is the EPP foam, single motor version of the Rogue. I had just changed the control surface configuration to front and rear elevons and I wanted to see how it performed down low.
Rogue VTOL Part 5 - Maiden Flight
zhlédnutí 1,5KPřed 2 lety
This was the first transition and forward flight test of the Rogue VTOL prototype. There is still a lot of work to be done to tune and refine the flight characteristics but it's progress. We performed a total of 4 successful flights and went home with the same number of parts in all the same places so we'll call that a win. Loads of data to get through before the next round of test flights. Sta...
Rogue VTOL Part 4 - Hatch Construction
zhlédnutí 940Před 2 lety
The top hatch was the last composite part to be made. I decided to make a video of my entire process from design to installation. I want to stress that this is my process and I pieced it together by watching others and by a lot of trial and error, this is not necessarily the best, fastest or cleanest approach but it is what works for me. I'm sure my process will grow and change as I gain more e...
Rogue (Tandem Wing) VTOL Part 3 - Nacelles
zhlédnutí 1,8KPřed 2 lety
Rogue (Tandem Wing) VTOL Part 3 - Nacelles
Tandem Wing VTOL Part 2 - Wings
zhlédnutí 3,3KPřed 2 lety
This is the second video in the series and is dedicated to the wing design and construction. I am using a hollow composite stressed-skin construction for the wings on this tandem wing VTOL. I will explain some of the design principles for the tandem wing, look at the structural design of the wing and then show you the construction materials and process. Please check out Rene's channel for some ...
Tandem Wing VTOL Part 1 - Introduction
zhlédnutí 5KPřed 2 lety
I have been working on this project for a while but realized I never formally introduced it. This is my winter R&D project. There is plenty here to keep me busy through the long Northeast winter...
Defiant 52 Testing with (almost) The Full Test Team
zhlédnutí 484Před 2 lety
Defiant 52 Testing with (almost) The Full Test Team
Defiant 52 - Earning its flying colors!
zhlédnutí 380Před 3 lety
Defiant 52 - Earning its flying colors!
Rogue VTOL Project - Part 5 Wing Design and Testing
zhlédnutí 3,1KPřed 3 lety
Rogue VTOL Project - Part 5 Wing Design and Testing
Rogue VTOL Project - Part4 “It's Just a Flesh Wound"
zhlédnutí 851Před 3 lety
Rogue VTOL Project - Part4 “It's Just a Flesh Wound"
Rogue VTOL Project - Part 3 Transition Flight Testing
zhlédnutí 1,6KPřed 3 lety
Rogue VTOL Project - Part 3 Transition Flight Testing
Rogue VTOL Project - Part 2 Initial Testing
zhlédnutí 1,2KPřed 3 lety
Rogue VTOL Project - Part 2 Initial Testing
Rogue VTOL Project - Part 1 Design Walkthrough
zhlédnutí 6KPřed 3 lety
Rogue VTOL Project - Part 1 Design Walkthrough
This is 4 years late, but kerosene and baby powder that you just paint on and run the fan with the body at the AOA in question. Paint your wings black and you can see exactly how your airflow behaves when the kerosene evaporates and leaves behind the baby powder. You can get very advanced by mounting through the front and rear of your view port with your mounting surface floating between two panels. You can suspend these floating panels on load cells and get some really good data. If you make your floating panels round you can get a complete plot of lift to drag at pressure and speed at different AOA by letting ms excel draw up some graphs for you with the data you capture with your loadcells. You can also print your honeycomb structure and have your smoke tubes extending straight out of that, or mount your wing vertically and introduce the smoke through the leading edge of the airfoil through tiny holes, makes for some great viewing. I mean yours was already built, but just some ideas for anyone else that might want to experiment with building one.
I know this is a long time since you uploaded this video but this is very useful for my current thesis haha.... Just wanted to ask were you able to measure what your avg wind speed is in this windtunnel that you could achieve to test your wing profiles and aerofoil profiles? @DefiantWings
I was only able to get about 15-20mph with the fan I used. It needed a more powerful blower.
Hope you know this is my favorite wing to fly! It the best for the most aggressive maneuvers! It's also one of the loudest in my fleet since I run it on 6s. Absolutely love this plane and hope it makes a return someday! Thanks for developing such a kick ass plane!
I’m glad you liked the D28. It was by far my best seller.
0:23 what is the name of this aerodynamics measurement app?
XFLR5.
When does a kinard become a wing? And vice versa
That’s a good question. It seems there are a lot of answers. For me, if the forward wing operates like a horizontal stabilizer, as a control surface, I consider it a canard. If it generates an appreciable proportion of the lift, I consider it a tandem. I haven’t seen an official definition.
I’ve been flying RC a long time so I can tell you the elevator is kinda important
Essential, as it turns out.
Great project. I can't find 1/16" nomex. Their site shows only 1/8". Have you considered printing the wings in LW-PLA and use CF tube down the entire length for strength ?
Hi - fascinated by your tandem wing project. I studied a tandem wing airliner for my Masters in the '70's; and now that I've retired I've built a Bert Streigler Delanne D200 (featured in the September 1981 Radio Control Models and Electronics magazine). I would point you at the Miles M35 & M39 Libellula designs, and also Maurice Delanne's designs. A key feature of the Delanne designs is the wing separation. The front wing is always larger than the rear wing to ensure that the downwash does flow over the rear wing. This in turn also ensures that the front wing stalls first and the aircraft pitches nose down The Arsenal Delanne 10 C-2 had a top speed of 345 MPH and landed at 45 MPH!! My D200 has some handling quirks in the it rolls out of loops and also in any inverted flight it rolls out the other way!! Take-offs are very squirrelly too. The control system is elevators on the rear wing and ailerons of the from wing. The next steps are an elevon control system and possibly a gyro stabiliser. John B
Hi, you said you'll work on 2 axis mechanism to measure lift and drag... I think you forgot to upload the video PS: I really need your help in this... I'm working on the same project
Why put this horrible music to loud you cant hear any think
I always thought each wing is not on the same centerline
Too fast. Sweep the wing for speed
What advantages have you so far discovered with tandem? Im thinkin homebuilt design
So I’m in the early stages of developing a similar aircraft, and I’m curious why you chose to adjust COP/COG distance using AOI and wing size instead of airfoil choice. Thanks for the video, nice work!
The short answer is that it was just easier to do. It required less analysis and would allow for easier construction and modifications during testing. Using the same wing parameters meant simpler construction, and adjusting either wing's incidence was an easy way to tune the build during testing. While not as elegant of a solution, I don't think I compromised much in the area of efficiency, at least not at this scale. Good luck with your project!
dude, thank you so much.
I am attempting to build a tandem wing as well... is it possible for you to show sources for this design? Thanks!
ZZZzzzzzzzzzzzzzzzz
Thats a beautiful machine. A heavy lift version of the Osprey could look like this.
I love your tail design with the ducted prop. You could get rid of it’s yaw mechanism and use that servo to rotate the front motors independently.
Can I build an RC airplane with tandum configuration with both wings of exactly the same dimensions? Because, I want to build an RC plane for max payload carrying competition at my university
Sure, I used a longer rear wing so I could move the cg back half way between the wings. If they were the same length then the fg would be further forward. You will still have to play with the incidence angles of both wings to get a stable configuration
I arrive late. Congratulation, it seem to work super fine! Just one question, the control surfaces aren't useless? I mean the motor pods and it's part of wing couldn't be used to ensure it's role during forward flight?
The flight control surfaces are far more precise than the motor pods.
Where did u get all the calculation from? Can I get the reference material from where you got the numbers for the dimensions from? How do I calculate how much wind speed I can achieve through different cross sectional area?
Would the tandem config be a good design for a slow moving, high payload uav aircraft? Of course with a larger wingspan or such.
The tandem wing design is best use when you want to keep the wing span shorter for some reason. It isn’t going to be as efficient as a single wing with the combined span. It could be used for a slow/heavy plane if the wing chord, airfoil and span are designed for it. It won’t be as efficient a the single wing but it will have considerably less span. My early foam prototypes were very high wingload and flew efficiently. And they were small e to transport without removing the wings.
@@DefiantWings Interesting this was what I was getting at. Big thanks for the explanation!
I built a very rudimentary wind tunnel a few years ago; did what I was hoping to visualize which was vortices. I planned on building a better one and finally I'm biting the bullet. I'm also planning to use a radiator fan (16"). For my vapor it's going to go through the wings and exit out their tips in a specific location. Which means the connection to the wing and what allows the vapor to exit through is the same thing. I built my wings in the past out of cardstock which means I could create designated channels in the wing to direct the vapor itself to the tip. Worked perfectly. For the test section it's going to be 10x10"x3' length. All out of plexiglass. I'm thinking of painting the bottom and back side in vanta black for obvious reasons.
Hope you'll have this back in stock soon!
Great spot. Getting nice and low there
Thx! This is basically my background. I only test small planes here. Too many trees in the event of a crash.
Great video, could you tell me, what kind of smoke generator is? thanks
Theefun 400-Watt Portable... www.amazon.com/dp/B01MDNTD7A?ref=ppx_pop_mob_ap_share
Quite impressive, great piloting
Thank you! This is my small plane/wing test track. It’s nice to finally be able to see everything
Dang it S, that is 6S D28 territory !! 😎
This is a 4s, 32” build. Just something for me to play with
@@DefiantWings Nice ! Your back yard ?
Yes, well part of the family compound. We have 3 houses within the family all adjoining
Let’s race 😁
Let’s go!
It’s got a tail on it! What ya flying? Lol
It does indeed have a tail. It’s a little boomer that I’m playing. It’s a personal build, not a product.
Man isn’t digital nice? You can see every twig and every shadow.
It really is amazing. It takes the guesswork out of what it is you hit that knocks you out of the sky 😜
Thanks for your explanation
I hope it helps.
@@DefiantWings a lot i am working on the same project
@@flyoran great! Good luck!
Shelby mowing the lawn on that rip!
Did you use software to design it....Xflr5 or something like that...just trying to figure out the CG calculation so I can build something like that
Yes, I used XFLR5 to run the calculations for this design.
@@DefiantWings If you ever decide to release the files for it let us know....would love to make one.
very nice design! love the tilt wing, Ive always wanted to design a quad vtol with rotating wings similar to yours. wonder if all 4 corners can be similar in design for a quad motor configuration, each winglet optimized for their position rotating with the motors. front and rear can be ran at optimal rates to maintain level landing and transition between vtol and vertical flight. i wonder how difficult it would be to have the motors rotate independently from the wings. would be able to differentiate the glide angles while motors shift into position. Going to start working on the CAD files
Check out some of my later designs
Nice 😎
Thx!
Awesomeness!
Thx!
Your lack of snow is depressing 😝
Not for me 😂
Other than the stabilization I don't really see anything about the GoPro footage that's significantly better. I mean I can see the 720p video and 1080p video is lower res, but I'm sure some of that is compression loss, too.
Both on-board and DVR are 1080 60. I actually prefer the FPV footage for flying. GoPro is great but I wouldn’t want to fly from it.
@@DefiantWings DVR is 1080? No shit. The more I hear about this system the more interested I am in getting it running.
Yep, 1080 60. I have it set to 1080 so I could try outputting to a monitor. My monitor doesn’t like 720. I haven’t tried 720 yet. With the wings I don’t really need the higher frame rate.
YES ! Wang Season 🤘🏻😎🤘🏻 .. need one
Yes you do! Lucky I know a guy 😜
Hi, Good video however I don't understand, you said you will use a contraction ratio of 6:1. The area of the testing chamber is 12in and the inlet area of the contraction cone 30in and not 12*6=72 inch square. Maybe my understanding is wrong, so can you explain it to me ? Thanks
It’s a 6:1 contraction in area. 12”x12”=144sqin x 6 = 864sqin. I used 30”x30” for the inlet wick gave me 900sqin.
@@DefiantWings oh, yes understood thanks for answering so quickly !
Did you use ardupilot for this build?
Yes, it’s Ardupilot
I am working on something similar, but I have an important question, did you use the forward wing with ailerons and the rear wing with elevators, or the other way around? Because what I have found out is the bigger wing should have ailerons, is that matching your experience? Thanks in advance for your reply. Btw, I really like that chill/hobby mood that I can feel in the video. Thanks. Mark.
Thx! I’m glad you enjoyed it. On the initial builds I used elevator up front on the small wing and ailerons on the larger rear wing. This worked well but led to a strange roll-pitch coupling in the controls. It wanted to pitch up when I rolled in either direction because the ailerons are behind the Cg. I ended up configuring it with elevons front and rear. This got rid of the pitching because the aileron moments were on either side of the Cg. It also helped with pitch controls because I could use less throw on the elevators because there were front and back. Hope that helps.
@@DefiantWings Thanks for replying, so you had ailerons in the rear one and elevators in both? How did you manage that with only 4 control surfaces, as visible at 0:52? Sorry for asking again, but I thought after so much experience with tandem wing, that you got, you could help me out :), thanks.
Originally I had elevators in the front and ailerons in the rear. I now have Elevons front and rear. So, combined elevator/aileron front and rear.
@@DefiantWings Thank you, sir! Have a good day.
My pleasure, any time. Good luck with your build.
good morning, please tell me, which engine is the most optimal for the defiant 42? thank you so much
Most people use a 2814 motor. The kv and prop size depend on the type of flying you do and the voltage you run. I fly 4s and tend to mainly cruise. I prefer the 1250kv with. 9x6 prop on 4s. Some will step up to a 2820 for higher speed applications
@@DefiantWings Thank you very much for your answer, currently I have a FLASH HOBBY D3530 1400KV. the people from lost wing channel recommended it to me, my type of flight is to do distance, that's why I need to optimize amps and weight. How much can the ideal final flight weight of this defiant 42 be?
Ah, ok so that motor size is a can measurement so it’s equivalent to a 2808. That should be a good size for a light build. The LW guys like to fly very light. My personal 43 is about 1400g AUW but it is the original design and probably a bit overweight from abuse. I also cut the Lost Wing 42 designed specifically for the Lost Wing guys. It’s a lighter foam. I would think that 1000g-1200g is where that version would be at its best. The Lost Wing guys can give you a better idea.
@@DefiantWings Thank you very much for your answers, you are very kind. One last question and excuse me, how do you think I go with a T-MOTOR 3536 1200KV motor? It is my first option to use because it is a reliable brand and I have it on hand.
If the 3536 is a can size I think it should be fine, that is probably equivalent to a 2814 stator size.
How where the straws fixed in place? If they aren't glued won't they just get blow out by the fan?
The straws are stacked between pieces of screen. It holds them in place and helps cut the turbulence as well
@@DefiantWings What type of screen? A common exterior window screen?
Yep, it’s some fiberglass screen I had left over from a screen door repair. Nothing fancy 🤣
@@DefiantWings Thanks for the reply! I'm building a similar small-scale tunnel and my one concern is that the screen would unnecessarily decrease the velocity of the air entering the test section. However, the screen saves a lot of time and money over using spray adhesive to fix all the straws in place.
It was a compromise I was willing to make. A lot of the research I read said that screens were a part of the flow straitening process anyway.
Hello, I would like to know the useful section of the tunnel, and the diameter of the copper tubes that you used. Thank you. Great job!!!!
The test section is on 12”x12” in section and 24” long. The tubing is 1/4” od copper tubing. I’ll have to check the ID
1/8” ID
Whoo, thats a Big Prop!! What are the advantages of this Wing?!
Yeah, it’s really big for a wing,17”. It makes for an interesting launch. This wing is designed for long range/long endurance missions like mapping. Right now it has a flight time of 90 minutes. The large prop helps with the efficiency
hey, I am looking to do this as a part of my master thesis, can you please name sources you used for determining geometry of a tunnel for best flow and speeds?
www.intechopen.com/books/wind-tunnel-designs-and-their-diverse-engineering-applications/design-methodology-for-a-quick-and-low-cost-wind-tunnel This is one of the documents that I used and the only one that I still have a link to. Its a pretty good writeup and should help you with the sizing. I am planning to spend some time on the wind tunnel this winter to try to develop an instrumentation package. I'm also looking at a higher capacity fan as well. Too may projects, so little time
@@DefiantWings thank you very much, finally a piece of literature that describes exact geometry after all the books I downloaded