I am a full-time aerospace engineer who goes home after work and keeps aerospace engineer-ing. I got a few degrees in airplanes and helicopters and now I want to share, teach, and inspire in the realm of aerial robotics to show you that advanced concepts don't need to be so scary.
@@NicholasRehm thnx! I was tryna make a schematic of where to plug in all the equipment, with my receiver and the motors. Would my Taranis X9D radio controller and X8R receiver be fine? I'm changing the code but a little scared if the code will work. The hardware was weird for a sbus receiver
Run 1 ground wire from the rx to ground on teensy, 1 power wire from rx to 5v on teensy, and each of the 6 channel's signal wire to the designated pin on the teensy. Pin numbers for pwm rx type listed in the docs
Plotting the dependence of Thrust on Throttle is highly incorrect from both a physical and logical standpoint. You need to calculate the Specific Thrust per unit area of the airflow and plot the graph based on the number of revolutions per minute (RPM). As it stands now, you are comparing apples to oranges.
I have had some trouble with the main code not recognizing the MPU6050 and stopping it from uploading. I have tried everything I can to make sure that both DrehmFlight and radioComm are in the same folder and whatnot, but nothing works. What am I doing wrong? (I'm not very experienced with Arduino)
Read the docs. No need to mess with the folder contents as downloaded from GitHub-it’ll work out of the box. If it’s not uploading, make sure you have the right teensy serial port selected. You also need teensyduino installed. All in the docs
@@NicholasRehm I have all that done and double-checked, and I have a good USB connection. I simply downloaded the files from Github and put the DrehmFlight folder in my arduinoIDE projects folder, so I'm not sure what is wrong. I'm not very adept with Arduino so this is probably user error.
Any updates??? I have no experience with propellers but do they have any that can work in reverse as well so that the rear propellers could change direction to assist in transition?
If the lift force tries to fold the wing and you're going into a lot of work to withstand/counteract that, wouldn't it make more sense to reverse the folding direction?
@@NicholasRehm makes sense. I was thinking a static stop to limit over extension, but it's your design and "I've thought about it but decided otherwise" is good enough for me, lol.
If you add tail at bottom, in shape of turbine jet, you have turbine giving you extra lift from bottom. Add small wings for lift, pitch and direction, at the tail end.. You get new drone design.
Simple design changes would help a lot. Motors need some tilt so the wash isn't going straight down easy to do with some 3d printed mounts. and the load needs at least a 3 point harness to stable out the load. These two design changes would make it much more stable.
Brilliant video. Would love to see you try put the electronics and motor internally around the axel inside a cyclo rotors to use a single rotor as a drone. Probably would be really tough to do but would be really cool just a flying wheel wizzing around.
You could also call this one the aileron sitter. If I was doing this I may want a bit of stand-off so it was not actually landing on the control surfaces.
What if you matched the camera's framerate to the rotation of the drone, so that the direction the drone records video from is always the same? Kind of like how biplane guns shot between the propellers. Then you don't need all those lights adding weight and drawing power.
Why not having all blades on the top .. thus, you can have four standing points on the bottom .. which makes your drone much more stable on take off and landing ... Also about not utilizing the two motors and reducing drag by having fordable blades .. would using the extra two motors reduce the power consumption of the other motors .. those less energy required ...
Motor position won't impact stability since there is no inherent stability of hovering things like this. The two motors I shut off have larger blades with shallower pitch optimized more for hover performance, so idea is that they're doing more harm than good for forward propulsion
@@NicholasRehm The motor position prevents the drone of having four standing points .. I stability I was referring to is on the take off and landing ... I can see the logic for shunting down the two motors ... yet I still suggest to investigate fixing that issue so you may have four motors running on lower consumption that two motors running on a higher consumption .. I do not know if did explain my suggestion correctly or not :-)
I'm not sure how you are mixing from yaw to roll in the transition, but if the fc is still attempting a portion of hover mode correction this could explain the rolling behavior. just my 2 cents *edit Possible solutions 1 drop the hover mode yaw gain harder sooner to account for the increased yaw effect from the differential thrust of the partially unfolded wing 2 drop the hover mode roll gain harder sooner as this is causing a yaw Speculation 3 swap the cw/ccw propeller configuration. Should be more stable..? 4 have you tried perturbating (with fans and/or a pokey stick) the craft on the test stand while transitioning? 5 the lowered elevon stalling in high alpha This is such a cool project i really want to see it work! best of luck.
I like your jovial response to calamity and disaster Nicholas! And thanks for sharing this research. I'll be checking out your link to Jude Schauer and coming back to see what else you have been doing. Subscribed!
I don't understand why you mention in the beginning that its not intuitive. By making wings you transition away from helicopter style flight towards a plane that is just flying in circles on the same spot. Its not a paradox.
Cool, but - you could just make a flying triangle/rhomboid/whatever shape you want, just make all surfaces lifting surfaces. Less complexity, less weight, more everything else.
You should try making it fold the other way (flip the cockpit on the other side) so there’s a mechanical stop that opposes the lift forces not just the folding mechanism
Aren't you also pushing the airflow of the smaller propellers over the larger propellers? From my non-engineering brain, that seems... good. Because you are using the same airflow to do two different functions?
Antoehr option could be to use a linkage with an over the centre mechanism to actuate the wings. That way, when the wing is straight, its mechncialy locekd in palce and does not rely on the strength of the actuator. Albeit, the current config seems to work great, but this might be a concideration if the design is scaled up
If your props were upright during the spin, then the drone would fly up, right? So making them tilt/pitch with the arms, it allows it to hover in place. Did I get that right?
For something like this, you won’t notice the “performance drop” in the flight controller with increased vibes from plastic frame. But if you’re looking for something stiffer anyway, try petg-cf
Would it be better if you decouple the directions of the three wings? For example, during level flight, one wing could be vertical to the ground, presenting the smallest surface area, while the other two wings are parallel to the ground. Unfortunately, in this position, the propellers that are parallel to the ground cannot achieve the best efficiency.
