Secrets of best performing drones & recent breakthroughs
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- Опубліковано 30 вер 2024
- In this video we look at all the secrets of best performing drones. This video was sponsored by Brilliant.
To try everything Brilliant has to offer-free-for a full 30 days, visit brilliant.org/... . The first 200 of you will get 20% off Brilliant’s annual premium subscription.
The video is limited to hovering drones. We look at a new type of teetering hinge propeller, that will allow single large rotors.
I will be doing the fixed wing drones soon. There is some brilliant work being done. Deliveries have already started in 50 mile radius.
Brilliant is the name suggests is a Brilliant platform.
To try everything Brilliant has to offer-free-for a full 30 days, visit brilliant.org/ElectricAviation/. The first 200 of you will get 20% off Brilliant’s annual premium subscription.
Will you cover the X-P4 Transwing drone from PteroDynamics? It has variable wing geometry, and there are videos of it on UA-cam. I think they have a DARPA sponsorship to develop the larger X-P5, which will weigh ~320 lbs.
Love. Your. Work.
@@manofsan Yes its in the next video
Watching this channel feels like attending the interesting and fun university engineering lectures for free. Love this channel!
Thank you. Very kind of you. I was a University lecturer till 2015
great content. Thank you for your work.
The advantage of lipo batteries is that they are safe ??????
9:00
Lmao never had a lion burn but 3 lipos lol
Excellent research. I learned a lot. Thanks!
Replace the reciprocating gasoline engine on the that drone by a microturbine shaft, multifuel hybrid much more efficient, simple, and able to use renewable energy sources like ethanol or any other vegetable oil.
Just saw this! Missed the notification. Great video with clear explanation about why drone designs can't just be scaled up.
The elephant in the room for crewed e-VTOLs, like Vertical and Lilium, is that you can't autorotate back to the ground in the event of total power failure. These solutions are banking on the CAA and EASA accepting the argument that quad-redundancy means you can still fly with 1 failed system. However, the increase in disk loading with one fail means each system now needs
fail power = (4/3 weight) * sqrt( (4/3 weight) / Area ) = (4/3)^1.5 = 1.54 power, with failure most likely at landing.
The certification authorities know this so are imposing 1E9 hours to single failure on all systems, including the need to demonstrate battery reliability at 154% hover power while at low SoC. Two failed systems would be 283% power. This is why designs like Jaunt Air Mobility, that retain autorotation capability, can be certified using existing helicopter regulations.
A recent example of a high disk loading VTOL still trying for certification is the Leonardo AW609 tilt rotor, that first flew some 20 years ago. The problem is that high disk loading also increases the decent rates that could be subject to vortex ring state, which has lead to uncontrollable roll accidents with the V22 Osprey in the hover. Again the certification authorities know this and will be very demanding in demonstrating that this can't happen in customer flights. Again, designs like Jaunt Air Mobility can just use existing helicopter regulations.
I am reminded of Alan Brown's comment about "there being no need to stub your toe" when explaining why the F117 just used the F16 flight control system rather than develop something new. Single rotor with swash plate has been subject to over 80 years of optimisation - doesn't seem like a great idea to abandon it when the batteries are the bit we are trying to develop...
Thanks Martin for your informed comment. Yes Power increase in case of a failure means the packs have to be designed to meet them. This inturn means larger packs and this would mean more weight. So this is another negative feedback loop
Sources in description would be great
Like always. Your reports are very interesting.
Great video!
Thanks
Awesome presentation !
The square cuybe law does not apply. The weight can be reduced signicantly ion the larger drone. If the weight is less the motors can be less which means the batteries could be less,etc.
Hey, great video.
I would really enjoy if you go to lilium munich or spain and take a closer look at their evtol.
(Same for joby) :)
maybe youre lucky and get a response from their pr-department
I have been contacting BlackFly for exclusive content but didnt get anything. I will try my luck with Airshows where they get displayed
Quad copters always felt like a dead end to me. Yes it is simple design balance able just by differential thrust. But it is a one trick pony. That one trick being easy to make and easy to fly leveled so that anyone can use it.
And it sacrifices everything else along with efficiency to achieve this. There is a reason why some piloting experience is necessary to fly more complex machines. Whether drones or planes.
If leave leave designs meant as children toys behind, we can finally move forward and whole world of options opens up for us. And fact that we have tine computers these days to use as FBW systems even mitigates the pilot experience. But when pricy machine is involved i really see no downside to properly trained personal.
The disc loading on a turbofan is around 5000 kg/m^2 so this isn't a limitation. Torque and thrust can be changed quickly using collective pitch alone so powerplant RPMs aren't a limitation either. I suspect a large turbine powered quadcopter with collective pitch on open rotors might make an agile weapons platform for attacking ground targets. It would be an attack helicopter with aerobatic rates. A rigid rotor with cyclic pitch must transmit all rolling torque through the hub. But a quadcopter's rolling torque is applied via differential thrust to the arms. A full sized attack drone could be as agile as a house fly.
want to have a helicopter (one-rotor) stabilize easily? use horizontal and/or vertical gyro spin discs, like in auto-gyro or quad copter drone, in the main hull with the motor
use a thick whoop as simple tail-sitter transition drone-plane, the drone long vertical ducts are circular wings in the flight mode
put a normal helicopter blade above a normal drone, can be folding/stopping during flight
just put norma quad rotors in a helicopter drone, all horizontal flat, any size helicopter rotor
the helicopter rotor does not need to be complex, just a disc, the quad drone rotors will keep the drone in proper direction, ie, differential thrust balancing
15kUSD? why, someone is being very greedy in service of the false gods of money-law-kings