Search results

There are plenty of warnings in MRF to avoid the 20C batteries for any VTOL aircraft... in this case the MRs. Even with 2 batteries in parallel one should remain with 25C or a bit higher and not use 20C IMHO. Using eCalc will help to determine at what point one has entered into the realm of...

soler... that is very good question! ESCs have to be connected to a charged battery pack when they are configured and will determine the total voltage from that. How it then determines the number of battery cells, I have no idea, unless we tell it what each cell nominal voltage is by means of...

Seems I made a mistake selling my previous MR c/w WooKong M..... I had about 150 flights with it and the buyer probably has more that 100 by now. New A2 is working great after about 20 flights and my local DJI dealer is flying one and selling many apparently with no issues. He was surprised to...

The more objective articles about Multirotors appear in the magazines focused on science...... as in this case: http://www.popsci.com/article/science/august-2014-25-reasons-love-drones For over-dramatized sensationalism and excessive misinformation...... just follow the articles written by...

There are two DJI documents for the F450. Prop configuration is in the document related to the airframe. In all cases, study these manuals thoroughly...... After the 3rd read you will be in a position where you can....not only fly your MR but you will be able to do it safely with less risk of...

I am using the 22 pole T-motor 4012-11 400KV with the Turnigy Multistar OPT 45 Amp ESCs...... no problems at all........ about 20 flights to date.

Thank you Chad.... love that background music... just wondering if it will be possible to order up a BlurFix Air sometime in August and have it shipped into Canada! The CP/ND combo would seem better fit-for-purpose from my perspective as the polarizing filter shifts so much as the camera rotates...

Hello Chad, Whats the latest of choosing a supplier for a good ND or polarizing filter that is fit-for-purpose for the Hero GoPro3 + Black on a stable 3 axis BGC system? I can't see any jello in my aerials but not 100% convinced it is not there or there is 0% vibes affecting image video image...

I use Google Translator or Babelfish translator.

Apparently the ND offsets the shutter on time relative to frame rate for better video so as to reduce jello which I don't think I am getting with my 3 axis BGC + 32 but Alexmos. But I think the Polarizing filter can do that and more, i.e., cut thru glare and increase contrast etc. etc. Most...

Turning on transmitter output section without antenna connected could damage output section of the transmitter. Or Transmitter defective - try to exchange defective unit with your DJI dealer. Possible hardware failure! Espanol: Leo, Computer Übersetzern oft nicht effektiv zu arbeiten...

If I recall correctly, when using the Notebook PC it seems to me that you can plan ahead by simply visiting the intended flying spot from your office/home network. Once you get to the flying site, that area of Google Earth will be pulled up from PC memory and loaded to the background. I am not...

That is an excellent lead with respect to the issue of "detent" or what we previously referred to as cogging. This portion in particular: Controller implementations: Because the controller must direct the rotor rotation, the controller requires some means of determining the rotor's...

Excellent to see this all done "the right way" with quality freq generator, Oscilloscope etc. I have a couple of comments/questions though: 1) Zooming in on the leading edge of one phase output, can you see any volt spike issues or has newer ESC circuit design eliminated that issue? V-spikes can...

A bit more info on "cogging" etc. see report number 4 by "the other dave". http://www.rcgroups.com/forums/showthread.php?t=28021

Indirect feedback, if there is any would not be very reliable. The larger industrial brushless motors one feedback mechanism is the brushless motors have a black/white BCD on the motor shaft and a photoelectric sensor (5 wires between motor and esc). From that sensor the speed controller can...

Unfortunately these little and simple 3 phase motors and ESCs do not incorporate a feedback system from the motor so as to correct such situations automatically. The bigger industrial systems do have that feature.

Did you try to switch to attitude or manual mode once it started to drift away? If so, did it not respond? There are some web sites that keep people up to speed of severe solar storms that can mess up the GPS systems. It might have been one of those days..... Give us the date and time of the...

By the way.... are any of the larger, e.g., U7 or U11 motors using at least one thrust or so-called "end-thrust" bearing? They last so much longer in VTOL applications as the do in our industrial plants where vertical pump motors are required. http://en.wikipedia.org/wiki/Thrust_bearings

I selected timing at: high and that was for Hengli 22 pole pancake style motors. I have had tremendous success with Turnigy Multistar 45 amp OPT ESCs of several MRs including one I sold many months ago. The customer is still flying it extensively with WooKong M one 5.20 fw Starting to regret...