Although the results didn't show much conclusively, I think it's safe to say losing one motor doesn't faze Ardupilot in any significant way provided there is still enough thrust, and the prop direction doesn't matter either.
Пікірлер: 58
@iforce2d11 ай бұрын
I also tested cutting both motors in auto mode, but forgot to include that in the video. The plane pitched up a bit in an attempt to maintain altitude, which resulted in parachuting downward at 7m/s at which point I got scared and recovered it in manual mode. You can see a clip of that here: kzfaq.info/get/bejne/arRgZ5mBuqeZhKc.html
@legonation11 ай бұрын
Erm if Andrew was auto compensating and automatically adjusting for the switched of motor leading to your video is it not logical to assume that having an autopilot doing micro adjustments alongside you flying leads to the exact same video Andrew produced? Andrew is making minor adjustments in his head leading to you saying in effect that his data would not translate to lets say my video or stave's down the road, but what would be the outcome if you removed the autopilot (clue in the name there) all together and just flew the plane on servos, esc's, motors and you? then actually tried those exact same tests with no computer assistance, do you think there would be any noticeable difference then?
@argusroot11 ай бұрын
saturday with a new iforce2d video is a good saturday
@goobisoft487311 ай бұрын
Any day with iforced 2d is a relaxing day for me i like 5o chill while watching his videos very calming videos
@AerialWaviator11 ай бұрын
Nice to see you have nice spring weather and are up flying again. Really appreciate the inclusion of the "RC input" OSD. This a great visual aid to helping understand what is happening. Suggestion: for different flight modes (10:45), would suggest changing stick-end, or stick-box colour based on flight mode (@10:45 Manual, FBW_, etc). With the motor-failure simulation (12:50), the right wing is visually tilted (~5-10º) relative to the horizon, and suspect the fuselage has yawed left to maintain a straight track over ground. To better visualize the yaw, I'd suggest tapping a ~7-10cm length of thread, or yarn on, or just in front of the main wing. (alternatively could attach it to video antenna, so just above the wing to eliminate surface friction). If you've ever seen video of a sailplane, often there is such a 'yaw-string' tapped to the canopy to help human pilots coordinate rudder and aileron inputs to help maximize efficiency (drag reduction). With just the right motor running roll-rate to left is high-rate, and roll-rate to right is low-rate. Logs should be able to tell difference in º/second. (or vice-versa depending on direction of rotation of the powered motor)
@AndrewNewton11 ай бұрын
Great stuff, specially the bit about me being an experienced pilot. Chopping a motor had a much bigger effect on my AlbaBird
@waynesmith228711 ай бұрын
Great view of the New Zealand countryside.
@jaytank3111 ай бұрын
Nice to see you using a flysky . Same one i got.
@deanedeane431811 ай бұрын
That was fun and interesting !!! and I love your plane design ..... I've run out of switches on my flysky so about to try a turn knob for the flaps...... Looking forward to your next video , good job Man 😉😎
@myway63353 ай бұрын
Man, you fly in amazing place!
@davemountford74811 ай бұрын
Hi iforce2d, I'm not surprised you saw no difference between the props inwards vs outwards spin direction. The benefit of having inwards spinning props is for when you are in the climb and have a higher angle of attack than straight and level flight. In that case the centre of thrust is moved towards the downward moving blade of the prop - and for the inwards spinning props that means towards the middle of the plane. Therefore you get a lower yaw moment, and a lower Vmca (velocity of minimum control airplane). This is likely much more pronounced in full sized aircraft which will have a MUCH lower thrust/weight ratio, and therefore a much greater angle between the incoming airflow and the aerofoil in a max performance climb. With the amount of thrust of an RC plane the effect might be quite limited. If you want to see the difference between the inward vs outward spin direction I'd suggest you repeat this test in a steep climb. I'm not convinced even then for an RC plane you'll see much of a difference, but perhaps in the telemetry?
@yatzeegamingop11 ай бұрын
I have never thought of this, thanks very much. Then again, i only fly single motor aircraft :D
@nickl946111 ай бұрын
Another amazing video! I could watch hours of this channel To answer your question in some other data that might be interesting. -looking at the pitch, roll, throttle curves is interesting, bit I wonder if looking at the pitch, roll, yaw ERROR might highlight any sensitivity. -Looked like there was a slight difference in turning radius at each waypoint. Wonder if this is significant. -Current being about the same is interesting. Theoretically makes sense that for either case, it would take the same energy to keep the bird up, but you might expect the single prop configuration to fly a bit more inefficiently. Maybe your vibey motor is adding inefficiency of its own. -A control lap with both props left untouched to compare to the prop off runs would be nice.
@xjet11 ай бұрын
Haha... finally, a use for those knobs! 🙂
@dronepilot260rc11 ай бұрын
What a beautiful plane! 🎉
@ChadDidNothingWrong11 ай бұрын
You should cut some scoops out of the fuselage and move the propellers closer...maybe even a little bit _into_ it.....then have those scoops shaped so they smoothly direct the airflow under the wings at the root. and maybe even slightly re-design the wing root to make a bit of downward thrust with that airflow (or adjust the flaps to take better advantage of it for just making that thrust during takeoff and on final). This may be outside the intended flight characteristics here, but it sounds fun lol.
@GhostRyderFPV11 ай бұрын
Add this data point to your calculations: Ardupilot powered VTOL Ranger T1 Q-Loiter mode, taking off. Get to about 10M, and starboard ESC decides to identify as roadkill and lets the magic smoke out. Interestingly, AP caught the failure and kept the vehicle shiny-side-up during the decent, gliding it into a gentle landing
@oleksiisavchenko210611 ай бұрын
Thanks!
@MatyasArby5 ай бұрын
Pretty cool. Not an RC guy yet, but seems like you could use a little rudder input programmed in for asymmetric thrust.
@iforce2d5 ай бұрын
Yes, if you wanted to do this intentionally for some reason that would be helpful. The question I was trying to answer was how well Ardupilot manages when a motor fails unintentionally, without any specific 'programming' to take care of it.
@MatyasArby5 ай бұрын
I see. I find it fascinating the stuff you're doing. In airliners if we don't apply rudder or rudder trim the autopilot will have a hard time compensating. And it looks like Ardupilot is basically an autopilot from what I can tell. Waiting for the retracts you talked about! :) @@iforce2d
@m3chanist11 ай бұрын
Really interesting, I see ardupilot in my future
@flat-earther4 ай бұрын
have you used ardupilot yet? did you succeed?
@pauljs7511 ай бұрын
This one seems to have a nice enough thrust-line that it barely notices a motor-out. But does that also make adding differential thrust in the control mix to boost yaw authority a moot point?
@CP-zi3eg11 ай бұрын
With such large propellers I would expect some gyroscopic effect that could make some difference between clock- and counterclockwise rotation in the case of one engine off
@honumoorea87311 ай бұрын
The torque is the problem not really gyro effect imo.
@Indonesia01ian8 ай бұрын
Hi. Do you know website or youtube that has a clear step by step to build ArduPilot RC Plane? Thank you
@alexanderfuhrmann49211 ай бұрын
Where did you flew it? The landscape is amazing!
@catalinalb172211 ай бұрын
This is like GNU Radio Software program!
@nabilgravityoxygen11 ай бұрын
Hi mate, where do you usually get your batteries from in NZ? I love in South Auckland, and I used to get them from Hobbyking HK warehouse, but they don't ship from there any more.
@iforce2d11 ай бұрын
I actually haven't bought any lipos for a long time, maybe two years. But I used to get them from HobbyKing Australia warehouse. In recent years I have only bought li-ion cells on TradeMe and built my own.
@jeffbluejets262611 ай бұрын
If you angle each motor outwards towards the tip of each wing at approx. 5 degrees, it will assist flight stability greatly with the loss of one motor.
@bolagerstrom154410 ай бұрын
Hi, thank you for show beatiful plane and excellent tests. I am struggling with a KillerWhale plane to make auto landings. Do you have some recommendations or could share some landing parameters. Please continue to share your results, thank you. Regards from Bo in Sweden
@iforce2d10 ай бұрын
Hi Bo, I have not done any auto-landing, but if I put landing gear on this plane someday, maybe I will :)
@serryscs5 ай бұрын
Great aircraft :) I have been building my designs for the last few years with literally same technology, orange foam ("penopleks"), fiberglassed surface and multiple sections on a wing cut from profile shapes. the only thing is, I have no idea how to paint them or make them look nicer. How would you go about painting one of your models to make them look all nice and shiny? :)
@iforce2d5 ай бұрын
I actually made a video all about my attempts to paint these. It didn't go very well, mainly because of the fiberglass fabric pattern on the surface. I can't really sand the surface much because I usually only have one layer of glass and it would be worn away too quickly before becoming smooth, plus the epoxy is very hard. If you want a truly shiny surface I think you need to make molded parts, instead of this method. kzfaq.info/get/bejne/bayanZiSsdOWgas.html
@alexscarbro79611 ай бұрын
How about a moving average filter block for the motor speed.
@UCs6ktlulE5BEeb3vBBOu6DQ11 ай бұрын
but when motors are properly matched to their esc and load, they never fail. Props do fail a lot though on RC. Am I right?
@fullpower838211 ай бұрын
Respect!
@barrycole837811 ай бұрын
You really should get a Tx with Open Tx Firmware on it, you can do all that mixing on the Tx, without all your extra bits of mixers etc.
@marianofpv11 ай бұрын
Or he can flash opentx on his Flysky I6X. :)
@spiroskatsikas11 ай бұрын
The twin motor and props are ok but plastic prop loosing efficacy through vibration and flex, change them and see
@pesqair10 ай бұрын
which one is the lift motor?
@nickst279710 ай бұрын
What do you need in order to run Ardupilot? A pixhawk? I wonder, why running Ardupilot is not possible with a regular embedded linux device, such as a Raspberry pi?
@iforce2d10 ай бұрын
ardupilot.org/rover/docs/common-autopilots.html
@nickst279710 ай бұрын
@@iforce2d Thanks!
@lalbabugupta838011 ай бұрын
HI, I BUILT nrf24 transmitter and receiver which output ppm using your sketch. What i want is to get my quad battery voltage to display at transmitter on an oled screen. May you please help how to configure this ❤
How did you put your "rc input" into video? How can I do this for my videos?
@iforce2d11 ай бұрын
Not easily. I wrote a program to read in the iomixer log and generate 38377 png files from it. Then I used ffmpeg to join the png files into a video. You can use things like Dashware and the regular Ardupilot log for a more typical approach.
@chinookmech11 ай бұрын
Why are you using such a cheap radio? There are better radios with longer range and more options for what you are testing. Your plane looks awesome BTW.
@iforce2d11 ай бұрын
I have never felt this radio to be inadequate.
@StuntDoubleFPV11 ай бұрын
Nice plane but that FPV runway..... *drools*
@iforce2d11 ай бұрын
I might have to make some landing gear for this thing and do it properly sometime :)
@imottofeivel247911 ай бұрын
Hi, is it possible to get some files for the plane ur using?