Flight Test to the Limit | 3D-Print Harrier | First time with swiveling nozzels
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- čas přidán 6. 09. 2024
- STLs on : rc-jetprint.de...
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When I was young, around 1985 the thrill in a RC anything was the numerous parts that came with it. I remember my father set up a table in my room and it took us like three weeks to put together all the pieces of this rc car named "Hot Shot". I mean EVERYTHING had a part, and ALL THOSE PARTS had to be put together. When I finally drove it the first time, I lost control of it because something had happen with the battery. Anyways it climbed a tree all by itself and we had no idea what went wrong.
I see electric planes like this and remember back, 40 years ago when the guy in my local model shop commented that with current battery technology electric flight was only barely possible. Now I see fantastic creations like this and love what technology has allowed.
its engine is a real jet...
@@ErrorXTech no it uses EDF's, kind of an electrical turbine
Brilliant video. And it makes you appreciate how much work went into designing the actual plane back in the 50s.
Brilliant. Worked on them all my life. They are a thing to behold taking off in person.
This project to so amazing, along with Joel & Melanie Vladhof work!
The harrier is my favourite aircraft of all time!
It´s a honor to work on this beauty.
I worked on the Harrier Jets for several years in the Marine Corps.
There are nozzles on the tail, nose and wing tips. High pressure air is bled off both the cold and hot exhaust. That is how control is maintained in a hover. The rotating nozzles two cold and two hot exhaust can rotate past 90°, so it can fly backwards.
Yes that's the next big thing 👍
A proportionally opening butterfly valve under the engine as airspeed reduces to direct thrust to the wing tips will help along with intermixed aileron and rudder control to regulate that tip thrust. That's how it's done on a real Harrier.
I think the solution is to have four motors. One in each nozzle. They need to be hooked into a gyro with a quadcopter type flight controller. That will eliminate the need for the puffers in the wingtips, tail and nose. For what it's worth. Outstanding work and good luck.
I disagree. This is a Harrier model design, not a new air frame. The nozzles are too close together for that to work effectively. However the nozzles could be moved independent of each other to change the overall thrust vector, but puffers are still required for VTOL control.
I agree with chairman kaga, that solution is definitely worth a try. 4edfs even small ones becomes a bunch of weight tho, maybe requires smaller quad motors to keep weight down?
As an aeronautical engineer I can really appreciate the hard work you are putting into this project. Fascinating to watch. Thank you for sharing.
You are welcome Andy 🙌
You Germans and your German engineering...
(Said with German accent) 😄
👏🤙👍
I love it!
😅🙌
Viel danke! Ach so toll! It was interesting to watch how you solved the issues. I am looking forward to finding out how you fix the lack of acceleration!
00:20 I love the use of the ramp, pretty much similar to how sea harriers were designed to be launched from U.K. light aircraft carriers like the Invincible.
Awesome engineering. Being able to watch the stall progress across the wing tufts was so excellent. Placing the camera on the tail looking at the wing might be interesting but will affect you aft CG problem. Congratulations!
This is the coolest thing I have seen on CZcams in a while
awesome project. also the launch device is great.
Fantastic project, that was very fun to watch the progress!
It's got the harrier whine too. I worked on them for 4 years in the marines and the whine will drive you crazy.
In addition to my first comment, think of the camera arm as a left leading back to the fulcrum at the wing. That little area of the camera mount has a lot more lifting power the further it sits in front of the jet. My suggestion would be to shorten the length of the arm and try to extend it out closer to level with the top of the jet so you can still view the strings on the wings and the control surfaces. Design a mount that will enable the mount's bottom surface to be as parallel to the surface of the bottom of the wing. Perhaps using a wedge so the camera is mounted at an angle but the surface is parallel. Or you could find a smaller camer and mount it inside a cone so the cone is pointing forward and not acting like a control surface.
Really nice job Rene!! I admire your determination. You are a real modeler, one of whom is becoming less and less as the years go by. There are still a few of us around. Lol....
Thx mate! I do follow my passion and have some fun with these Jets 😁👍
Harrier! Mein absoluter all time favorite Kampfjet!
I used to work on the actual AV8-B loading bombs!! Can’t wait to see the vertical takeoff
It will not be able to do anything close to vertical as it has no puffer-ducts.
Hi, that is some great work. It is cool to see you try lots of different settings and options. When you try to slow down on landing i guess engine power should go to max (or at least a lot higher) because thrust is now keeping the airplane up instead of winglift. The biggest problem will be roll control because the ailerons don't work anymore (wing stalled). The original has controllable jets (air tapped from the engine) in the wingtip. I am sure you will figure it out. Greetings
Thx man 🙌
That is what the puffers are for. The Harrier was only able to VTOL because of the puffers. Making a Harrier model VTOL without puffers would require some other additional thrust vectoring scheme. Perhaps active louvers or gates to better control the nozzle flow. The biggest problem is the design of the Harrier itself as the nozzles are too close together for a stable thrust platform like a quad rotor. The puffers are undersized and make VTOL like balancing the point of a knife on the head of a pin. That's why there were so many accidents with the Harrier and why it was discontinued.
@@dee5556 Actually, the reason why UK 'Hawker-Harrier' (or BaE for those pedantically inclined...or McDonnel-Douglas if we are talking GR9 variant) was withdrawn from operations was due to budget cuts and the economic situation (2007-2010). The aircraft had a very good record overall. Lest we also forget that the GR1s, entered RAF service with No.1 Squadron, April 1, 1969.
Almost 50 years to the day that test pilot Bill Bedford hovered the Hawker P1127 at Dunsfold, in Surrey, on Oct. 21, 1960; the UK government axed JFH (Joint Force Harrier).
@@drewlawrence696 You are correct but there more incidents than any other aircraft that I know of. Couple that with extra high operating cost.
@@dee5556 including the Starfighter?
what a amazing age we now live in,stuff like this was scifi dreams when i was growing up, im 60 now, this is defo a game changer this 3d printing, we need 3d printed food next fruit and veg, maybe parts for people like eyes organs, very interesting for a old fart thank for sharing xxbxx
Its amazing how British aircraft engineer Sydney Camm designed this innovative aircraft that is still in use by the US marines, having also designed he prop. Hurricane in 1935, not to mention the later jet the Hunter
Fantastic work I admire your patience and perseverance.
You're welcome Michael🙌
Nice build 👌
can't wait to see a vertical take off 😉😉
Hope to see vertical take off some day! So cool!
Klasse! Das ist ein wunderfleiger. Sorry my German is not as good as it could be. Amazing that it is completely 3D printed. I did notice that you dont nave the bled air puffers on the wingtips, nose, and tail. Is this because at this scale they are not required? Or because you have a gyro which will compensate?
Great work Rene. Most impressive. Oh and I love your bungee launch platform!
Thx Malcolm! The level nozzles are following in the next step👍
You are incredibly talented. I can't wait to see how this goes!
Thx Mike!
Harrier still the most beautiful jet since the phantom always reminds me of the Falklands and afghanistan.there was a guy recently on CZcams built one in his flat and it hovered beautifully not been on for a while
Rene,
Others have said, you need the puffers, at least in the tail for the yaw control, preferably nose, tail and wing tips. Maybe compressed gas like CO2,
You are also imparting a false behavior onto the Harrier with your gopro mount in front of the cockpit. The pitch and yaw are being impacted by the boom and the mass of the camera, just means you may have to reprogram the gyro and receiver/transmitter with adjusted gains.
I love the ease of your leading edge slat, simple and elegant. Quite different from what I worked with in F-16's.
Hi William,
the whole levelling stuff like puffers follows in the next step. This was just to figure out the aerodynamical behavior.
Very cool! I love how the slats came out.
OMG rhat is very good work i ever see. Balance and look so real. A+
What a fantastic piece of kit , i'm sure that it will take a while to get used to flying it . even the real thing wasn't easy to fly to begin with , well done !
Hi Rene, cool work bro. I couldn't help but notice wing tip stall and roll. I suggest you try putting washout in the wing, that is less AOA on outboard of wing(a twist in the wing itself), will stall wings level then. Can temporarily be achieved even just by mechanically adjusting both aileron surfaces up. Try it, see if it help. Love to see a fully stovl functional harrier eventually 🙂🤞 Goodluck with it.
Washout delays tip stalls, but I'm worried that on the final transition to hover one tip will still come out of lift before the other when the roll authority is even lower because of the low airspeed. Maybe by that point the aerodynamic lift will be so small it doesn't matter though?
I love how you use outside as your wind tunnel. I'm in the first 9 minutes of the video a minute or two after you started talking about the model being a bit tail heavy. It's obvious that you know what you are doing but at the 9 minute mark I think I saw the heavy tail problem you had. The camera is mounted above the jet looking down at the plane sitting on a flat plate on a 10 to 15 degree angle causing the plane to nose lift rather than tail heavy. Being lifted that far in front of the plane would make it very difficult to adjust for a heavy tail since the nose is always trying to climb. Or am I just way out of my league? Great job, I'm going bac to watch the rest.
I'm actually quite suprised how well this flies without the advanced flight control system such an aircraft typically requires
There’s a 3axis gyro on onboard, he talks during the video after he removes the leading edge slats about the percentage gains used to help stabilize the stall characteristics after the slats were removed also the buffering after he opened the throttle the gyro started to almost over correct
The QRS system in Harrier (Quick Reaction System) made possible to hover. That doesn't have that capability so it isn't so unstable.
excellent build! Thanks for the video. I know it's not true to the design but it may help the development phase. Consider coupling airspeed to nozzle angle. Then use small increments to get to the edge of stall and max performance. Also consider coupling roll to nozzle angle at low speed. The transition from normal flight to VTOL is a complicated maneuver. Looking forward to your next video.
Thx mate 👍
Amazing work ...subbed!
Welcome 😁👍
@@renerosentraeger - .... and your English is excellent, far better than my German!!!
Very beautiful work
Ein sehr professioneller Beitrag, dafür vielen Dank es war sehr aufschlußreich.
Kleiner Tipp für die Strömungsindikatoren an den Tragflächen, sie sollten für die Kameraaufnahmen zum besseren Erkennen, rot sein. Damit ist die Strömungsabdrift besser zu erkennen.
Tolles Video.
Heck with the remote… I want one of these for my GI joe classified figures!!!
Irgendwann muss ich den auch mal live sehen 😎👍
Wir sind dieses We auf der CompoCon bei Grevenbroich, komm rüber 😁👌
Rudder deflections in that gyro wobble were hectic!
Brilliant project!
Everything is possible with superglue,very good demonstration,thank you
Absolutely!
interesting perspective with action camera
Amazing plane!!!! Great Job 👍👍👍👍
Woohoooo 👌
Very cool. This is an awesome video Sir! I wish the USA would have adopted the metric system because life would be much simpler
Nice ramp! Genius!
Sir, Well done, gut erledigt.
Danke 🙌
Hey, super happy, your video is over 300K views!!! Let’s go for 1milion!!!
Excellent plane and video...well done
Thx man!
luar biasa idenya sangat berguna " semoga sukses
😁✌️
It's the amount of anhedral that makes it want to keep rolling over.
Tip puffers won't have enough velocity or mass to effect roll control in a small model. You'd have better luck with a reaction wheel style control vs trying to use independent motors and use the lift fans for lift and gross control and the reaction wheel for the fine tuning and precise control. Reaction wheel only has to be spun up at hover or really slow flight before there's enough airflow for the control surfaces to have enough authority for control.
I am sure the camera is not helping with c of g and aerodynamics. I am sure gyro is compensating for camera wobbling in that stem.
Sehr schön zu sehen
Thinking what this would have meant with real Harrier development.
Having a tiny camera in battery powered prototype would have fasten development a lot. No flying attached to cables and around pole in string etc.
YOUR SOUND REMINDS ME OF SEBASTIAN VETTEL
Fantastic work, impressive
😁👍
Awesome stuff my guy!! Keep it up!!
Yes!!
This is fantastic work and video. Watching with great interest. 👍
Awesome job, Rene!!!!
Thx🙌
Danke für das tolle Video, Rene!! Bin gerne dabei wenn du am Testfliegen bist! Ich glaube nur dass deine Kamera an der Nase toll für uns Zuschauer ist, aber aerodynamisch verfälscht du etwas deine Testflüge :D
Gerne Volker 👍
Very nice job and well flown! It handles the camera on the nose very well, it'll be interesting to see it fly without it. I was waiting for a hover, maybe next time?
Yes hover is next step 👍
Some things to note, the GR7 has extensions on the wing leading edge to the intakes. Also it has barn door flaps linked to the nozzles. As other commenters have noted you need a control system for low speed in roll pitch and yaw. You might be able to do this with a mini ducted fan in each wingtip and two in the tsil.
Control system is in the making 👍
Absolutely brilliant guys.. well done
1:15 Beim schneiden von 3D gedruckten Bauteilen mit einem Cutter-Messer, IMMER schnittfeste Handschuhe tragen.
Ich spreche aus Erfahrung, die Wunden sind tief und hinterlassen üble Narben.
Der Kauf von ein paar Handschuhen ist weniger Aufwand als das Heilen einer Zentimeter tiefen Wunde.
Looks really cool
Awesome job!
Super content. Ihr macht das echt gut!
Danke 🙌
I’m waiting for VTOL looking great so far
Tolles Projekt! Stark.
25:00 Theory: 40 deg nozzle down means the vector is pushing the entire jet upwards, which would reduce the amount of low pressure above the wing, thus reducing lift which the wings are creating. This means airspeed needs to be higher!
Amazing
Thanks for the uk
very cool project. Und sehr guter Pilot :)
😅🙌
Please make a jump jet harrier that's my favorite harrier where they put the nozzles down and it can fly up or is that the osprey yeah that's the osprey my bad that does that the hairier could just fly in a hairy maneuver real slow with the nozzles pointed down
Amazing. Thank you. Can't wait to send it to my German friend that doesn't speak any English. Just to play with him. He hates German folk speaking English. So, danke for two things. Lol.
Super 👌 cool challenge I love it
Sweet build brother!
Thx mate 🙌
I see that unusually the flow at the tips is inwards towards the root (the tuft indicates this) I suspect this is from the turbulent flow at the outboard slat end which makes one wonder if a tapered slat end would help control flow at the wing tips, also would it be beneficial to angle your VG’s out progressively towards the tips - ie where they are aligned straight with the airflow start angling the last few trailing end to the tip - so open them to the flow, thus should promote spanwise flow at the tips and give you smoother tip vortices and increase efficiency and lift? Just theory but backed by science - the benefit of your project is to be able to visualise these effects
*"unusually the flow at the tips is inwards"*
Flow slanting inward toward the root is to be expected near the wingips.
Good job,,👍
Great work!!!!
Sehr geiles Projekt 👌🏻
WON-DER-FUUULL !! 😮😃👌👏👏👏👏
😁🙌
You are stalling the tips before the root, need some washout!
Good that mate , well done all the same 👍🏻
Thx mate 🙌
Really awesome great job👍👍
😅✌️
250000 views in 7 days, congratulations.
Wow that is cool!
👍🇬🇧
😁✌️
Great video!!!
Always welcome.
Cool launch system
Very nice plane
Interessantes Projekt 👍
Richtig gut geworden 👌 vielleicht helfen 4 oder 6 kleine Räder am Schlitten, unten mehr 🍀 liebe Grüße und im still tuned 4 more my freund 🤣🤙 ceya 🤘
Mich interessiert eigentlich mehr wie er Schwebt 🤔 naja ich gucke erstmal weiter, bin fast am Ende?
Great job!!
This is really cool
Yes🙌
Hello from France 🇲🇫
You made great Great job and a very far Dev work too
That's cool to see such research.
In my thought you forgot to set up the basics.
You don't work a lot on CG, or don't mention it, but more important, I don't heard anything on Vé longitudinal
Your major problems mentionnés is low speed handling, and you fighting between electronics and hardest aerodynamics possible.
But back to basics, mod your center of push by dropping weight far lower possible, as a sailing boat, batteries, electronic etc... It could be fine just between the skid with an access door, and it remove lot of weight actually too high.
You also need to work on wing seat to adjust the Vé longitudinal, and add degree on it.
3d peint made a lot of weight on external panel where we don't want it, so you have to replace the more possible of it in lowest center, to have the best natural attitude possible
After that you could play on surface control size, fixed surface size, and after all that, on electronic.
Hope this help.
Continue to Dev fun planes 👍
Thx a lot Jerome 🙌
You need the wing tip nozzles to stop the stall from dropping the wing at low speed I think. 🤔 Probably the use of co2 here would be ideal.
Yes this follows in step 2 :)
@@renerosentraeger oh awesome can't wait to see it!
Nice Work.
😁✌️