EMG-6 Powered Flight Test (Predator 37 sustainer motor)

EMG-6 Powered Flight Test (Predator 37 sustainer motor)


This is test flight number 55 and 56. And we are testing the operational characteristics of the power plant system. After our last flight where we had the ESC over temp. and shut down. We have since installed a cooling system for the ESC. And we’re going to give two flight tests today to validate that
it’s functioning as it should. Hold it. Hold it. Hold it. Hold it. We will have two flights today. And on the first one we will be operating the powerplant system at about 50% power. And then on the second
flight were going to bump the power up to 60 to 65% power. Once we have completed the
two flight tests we will download the data from the ESC and the other two flight data
recorders on board and analyze the results OK, ESC is running, Cameras are running. Ok, So we are going to do our, Umm…. Regular 40 mph. Looks like winds are about 3 to 5. Trying to get my mic set-up better so hopefully you can here me a little better. ok OK…. I’m ready.. Hit It. It was ideal tow conditions today with about a 3 to 5 mph wind. Which at 40 mph gives us almost 1500 foot rate of climb on the initial launch. We are going to tow today to about 800 foot above the ground and before we cut loose and turn the electric sustainer motor on. Initially we powered up to about 40% power. And then as we turn on to the downwind, we will bump the power up to about 50%. The airplane is an absolute joy to fly and I love it every chance I get to be the air with it. It’s really nice to be able to take your hands off the controls and not have to worry about the airplane going anywhere. On this initial flight we have the power set at abot 50%. That’s not enough to sustain flight indefinitely, but it certainly extend the flight quite substansualy as you will see. How ironic the purpose for the entire test flight was to test the cooling system that we’ve installed on the ESC. And you’ll notice that I reach up to the dash suddenly as I remember that I forgot to the cooling system fans on . Currently, I don’t have any way to monitor
the ESC temperatures in flight. The only way that we gather that gather that data is by downloading the ESC flight data recorder after each flight. I do however have motor temperature that is coming throug the Eagle Tree system. And I can watch that in-flight. And on the first flight we were showing Motor temperatures about 170° and the outside temperature this morning is already
about 90°. So far on the flight we’ve been flying at a very consistent power setting. The reason for this is so that we gather some very consistent data from the ESC to see truly how the cooling system that we have installed is functioning. Once we get down to about 300 feet it time to start planning for the landing. These are all test flights that we are doing and as a result you never know what is going to happen. So, we stay with in close proximity of the landing area during the entire flight. Awesome! We have decided on the initial test flights that were going to leave the motor running temporarily after each flight so that we can use the motor
mounted fan to draw air through the motor for cooling purposes. Since we are simply going to take aircraft
back to launch site and launch one more time we will leave the motor running until we launch once again. As we pushed the aircraft back to the launch site. The tow vehicle is grabbing the aircraft end of the rope and will bring it back to
the aircraft. this total turn aroun time takes about 5 minutes. “I’m down to 160 on the motor temp” “yea, we should be good once we get to the top of the arc” ” “your pullin me dude”. “Okay, Hit it.” So on this flight we have bumped power up to about 65% power. On this flight at 65% power, this is
just about the minimum power setting to maintain level flight. From the ground aircraft has a very distinctive sound. This is of course from the propeller turning at such a high velocity. So we been flying the aircraft around at about 65% power. And I’m noticing that the motor temperatures are now starting to approach 180° to 185° This is a bit more than we want to experiment with on these early flights. So we are going to go ahead and reduce the power setting And start working our way back towards the ground. Since will be the last flight of the day will go to go ahead and land the aircraft long And then using a little bit of power we can taxi the aircraft right up to the hangar before we come to a stop.

100 Replies to “EMG-6 Powered Flight Test (Predator 37 sustainer motor)”

  1. Great video but when you have vocals in the audio turn it down so we can hear what you're saying. Other than that, fantastic video! Best of luck! William Catalina "Drifter Flying" on YouTube. When will it be ready & can it be bought without motor?

  2. For aviation people music is just a pain and is of no use in the video. Please in the future if there is nothing to say, seeing the airplane in the air is enough.

  3. Enjoy the videos but turn off the music when talking (maybe just get rid of the music), install a forward looking camera (maybe on the center blue spar) and remember that we (or at lest I) watch these types of videos to get a feel of what it is like to do what you are doing and not to be entertained like I am watching a music video. A camera on the center blue spar that looks forward and down a bit would gives us a view of what you see as well as a view of the instrument panel, stick and pedals. You can edit between the wing mounted camera showing you and the spar mounted camera showing the flight controls and your view. Also, are you planing on adding a windscreen to improve aerodynamics?

  4. Wow- I am totally new to this kind of thing but I am so enthrawled. Just great. It gives an old duffer like me renewed hopes of finally being able to fly…and not have to sell my wife to do it! What is the cost of this machine??

  5. Bigger Prop and geared Motor is required. Move more air at the same speed as the Aircraft.
    High revving small prop is very inefficient. Bit like driving along stuck in first gear.

  6. Soooo, the cooling fan is mounted to the motor. You have to leave the motor running to cool the ESC. In the mean time the motor is drawing current from the battery. Current flow is causing the ESC to heat up. So you have to run the motor to run the fan to cool the ESC. Am I caught up in some kind of weird loop here, or would it make more sense to use another method of cooling the ESC after shutdown.

  7. Is the music your in flight entertainment, or edited on footage? Im looking for cheap flights, do you do meals and movies?

  8. Interesting experimental,however for me the music spoils the video.I wanted to hear the electric motor and wind noise etc.

  9. Yes, battery fire has got to be the #1 fear and reason for many sensor points among the batteries to send live info to the pilot. No amount of fire extinguisher systems would stop one of those fires either.

  10. There is no need of fans when the air is moving…. Why don't you experiment with gear reduction and turning much bigger prop designed for the slow speeds….. I have been designing and flying aircraft since I was 13…. In my radio controlled airplanes the slow park flyers do far better energy wise with wide chord props with large diameters and considerable undercamber….. Pepper that looks a lot like the huge windmills of today would be about right…. I can guarantee you that that whizzing beating the hell out of the air prop you are using its burning thru energy like a banshee…. Look into doing some study of indoor rubber power micro lights with micro film covering….. Listen to your prop it sounds like a boat prop that bis cavitating….. Watch this video change your direction and get this electric thing to fly for an hour or more…. It's really quite simple… https://m.youtube.com/watch?v=Wsd8PIEItr8
    Your airplane is not flying fast enough for the rpm you are turning with small prop….. I know it's important to turn the motor at optimal rpm for energy conservation…. So determine that I would say you need to turn a prop of 7 or 8 foot diameter with a base chord of approx 11 to 12 inches tapering to 4 inches with a foil and twist appropriate to the speed range of cruise…. I would guess that 60 to 120 rpm would be good…. These are all just top of my head guess numbers that should be a good start place to begin testing….. Think about it this way a helicopter uses blades with huge rotor span and pitch is adjustable… You could easily make adjustable pitch for a big prop….. That Lil tiny prop you are turning is just beating the hell out of the air and turbulence eating energy….. Rubber power planes turn big props slow because it's like sitting in a canoe trying to row with a half inch dowel vs digging deep with a 6 inch wide paddle…. If you are going 100 mph you need prop turning to match that speed…. Going slow you need slow big prop…. In fact I have been considering building a rubber powered ultralight….. You wind it up on the ground and use a clutch to engage the bands…. When you consider the weight of batteries and electric motor I bet it will be a better choice for energy storage…. Another consideration is air pressure power….. If course solar panels in the wing should work as long as the the sun is out…. I just have never seen anyone approach it right….. I have built a fully solar rc airplane a long time ago that in full sun could fly indefinitely
    Think man….. That prop is killing power and over heating the electronic speed control….. Much larger prop with appropriate shaping and progressive twist and add a variable pitch…. All those are the answer to the problem you have been fighting for way to long

  11. Around 14:00 we are told about the electric motor sound – – – Uh could you have stopped the music at the point and let us hear it maybe?

    Yeah, I know critics are a dime a dozen.

    Otherwise nice little airplane – Will the next iteration be bigger with room for two (-:

  12. "There is no good, and there is no bad (stupid music), it's simply how you perceive things". William Shakespeare.Regardless of how you perceive the music, it's not the music making you upset.

  13. Super stable, well built and very stylish glider. Cooling issues would improve much with two motors in tractor configuration on the leading edge of the wins (with the ESC's there too). Also, these tests would work better with some partial windscreen before the pilot as he and the shell behind him act as wind catchers producing excessive drag, a no-no in a glider.

  14. My 2 cent's worth: The music issue has been adequately addressed here, so I won't beat that dead horse further – other than to respectfully ask, why is it seemingly deemed downright mandatory for generic canned music beds to be added to 99% of otherwise good YouTube videos in the first place? Most add little & detract much. On the positive side, as an RC pilot who has seen the electric propulsion revolution explode in a relatively few years, I commend this application & wish you continued success in the development of this fascinating project.

  15. Very interesting aircraft. I enjoyed watching the video. Just a couple of questions.

    What is the purpose of the 'faring' on the aft portion of the fuselage? Is it only for appearance? Does it not induce additional drag? Does it help cool the motor?

  16. Hello Brian, the plane is looking great! My Father ( Ben Phillips) and I are big fans of everything you do, cheers 🙂

  17. What a great aircraft! I'm just curious about all the testing and collection of data. Is this a prototype that you're hoping to put on the market?

  18. I would think you could make or purchase a cooling jacket that could recycle the coolant around the motor and/or esc and batteries. Would take very little power, maybe its own 2 or 3 cell lipo and the weight should be very minimal.
    Thanks for the video and info. God Bless

  19. What a lovely aircraft you have real potential there,what battery pack are you using ? would it not be a better idea to have the ESC in the slipstream externally mounted like we do with model aircraft,rather than relying on afan.

  20. Looks an excellent power plant! However a slicker airplane, flying faster would resolve your cooling problems? Consider a canard configuration with a hi mounted mainplane and pusher prop on top. The pilot would seat within the fin/fuz/ mainplane mount, with a canard stab.

  21. Flying is usually a "peaceful" experience for me, but as others have mentioned, that music is a total buzz-kill! That being said, I like the ultralight and really dig the electric "sustainer" motor. Any further developments?

  22. That fairing of rear part of fuselage works as a drag shute thus requiring more power at the expence of battery endurance. A windshield would be much more useful in reducing drag. The stupid music spoils all the beauty of this video

  23. The crappy music is louder than the talking. Hope what he was saying isnt important…cuz all I heard is Do it

  24. Better not stray 800 feet from ending site lol never ever stay from landing
    Close nearly didn’t make runway lol

  25. … if you wanna make a music video then by all means go ahead, but if you're doing a video on aircraft, maybe you don't need the repetitive porn video music in the background !!!!!!!!   Talk about irony… listen to the lyrics in the background song… "do it right, just do it , do it right, do it right.."  😉

  26. I'm afraid the music makes an otherwise very interesting video completely unwatchable. However, good luck.

  27. The music is unbareable. The motor sounds like a cheap piece of shit from china. The whole idea is a stupid waist of time.

  28. Why do you have yourself dangling out the front like an egg you can wreck your nuts if your feet fell out of that and why only one wheel unicycle landing gear that thing will flip in a heartbeat that lawnmower engine doesn't have ball bearings

  29. Looks like a nice floater. I agree dump the music or at least subdue it a lot.
    Thanks
    I would like prices for the part so I can decide if I want to spend that much

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