Gender
Male
About
Location
Mountain View, CA
About Me:
I built my first RC airplane when I was 12. It was of the gas powered balsa variety and had a wing-span longer than I was tall. I've still got the bug, although more interested in helis and multirotors these days.
Please tell us a bit about your UAV interest
Tilt-rotors and VTOLs
Hometown:
Mountain View
Activity Feed
"Hi Hollis, sorry for the extremely slow reply. Haven't been too active in diydrones recently. To answer your question, I did make the wing design, but it was too heavy and hard to control. I also made a couple of other variants, but the tilt-rotor…"
"@R_Lefebvre, what you are describing sounds like a compound eye of an insect.
Also, I don't think that anyone has mentioned this, but the human eye essentially has a gimbal system (it even "rolls" when we tilt our head from side to side). It's…"
Also, I don't think that anyone has mentioned this, but the human eye essentially has a gimbal system (it even "rolls" when we tilt our head from side to side). It's…"
"The reason software stabilization won't completely replace mechanical stabilization any time soon is the physics of light. It might work in bright sunlight, where there are lots of photons, and you can do fast exposures, but as soon as you have low…"
"I haven't posted the code yet... not familiar enough with github and with the community to know what the best way of doing that is. Maybe once I finish the final step of this project (which is adding wings), I'll look into how to post the code."
"Not planning to sell, but if enough people are interested, maybe =)
With regards to servos, I am using Hitec mini servos. The main consideration for me was small size and weight, and the ability to calibrate the end-points of the servos. The torque…"
With regards to servos, I am using Hitec mini servos. The main consideration for me was small size and weight, and the ability to calibrate the end-points of the servos. The torque…"
"I got most of the stuff from servocity. The shafts are 5/8", aluminum. Carbon fiber would work, but probably not save a lot of weight. Most of the added weight is in the tilt mechanism, landing gear, motor mounts, etc... The tubes are surprisingly…"
"Stan, I think tilting up slightly may actually be better because the whole quad can act as a lifting body. Most flight time probably in forward flight, but stability is my main concern (over flight time). Luckily my design makes swapping the arms…"
"Did you calibrate the accelerometer and make sure you are in stabilize mode?"
"Gary, that's an interesting point... I was actually trying to decide whether to use a symmetric or an asymmetric airfoil, and one the things I was concerned about with an asymmetric airfoil is that I'd always have to tilt the rotors slightly forward…"
"@BayAreaCrasher... yep, that's Baylands Park. Let me know when you'd like to meet up. Would be fun."
"Thanks Gary! The most important lesson I learned from my flight testing is that the front and rear tilt servos need to be in sync for yaw control to work. During the first two days of flight testing, I had uncontrollable yaw. As soon as it started…"
"Have you checked your ESC settings? You may have accidentally set a high battery cutoff voltage for ESC #4, so when your batteries start to run low, that ESC is doing a soft cutoff (to try to prevent damaging the battery)."
"Yep, I've seen those... I think I've checked out pretty much every VTOL related video on YouTube to see what others are building =)"
"Yes, the wings will tilt with the motors. Most "real" VTOLs like the Osprey keep their wings level, and only the motors tilt, which I guess is easier to build at a large scale, but can't be great from an efficiency standpoint since since the wing is…"
After more than a year of design and development, I've built version 2 of the iQuad custom tilt-rotor quadcopter which is capable of achieving high forward speed by tilting its rotors forward in flight. After several days of flight testing and…
