DavidMarderATL's blog - RC Groups
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Posted by DavidMarderATL | Jul 03, 2013 @ 12:06 PM | 2,085 Views
Now that it seems like we've found a way to make things smooth and stable, and a gopro with adjustable white balance, I'll very soon be using my copter for couple of aerial shots in a short film my friends and I are making... But until then, here's my latest video...

Candler Park in June (4 min 36 sec)

Posted by DavidMarderATL | Jun 20, 2013 @ 08:28 AM | 2,141 Views
Sure. I know what I'm doing. Or at least I *should* know what I'm doing.

Last weekend I managed to give myself five stitches in my right hand and some nasty cuts on my legs. Luckily, I was recording video, so now everybody can watch and enjoy.

The good news is that I think I might have gotten my RCTimer brushless gimbal working pretty well! Or at least, it was working pretty well. I haven't had a chance to test it after the crash. Have a look...
Sometimes, your creation turns on you... (4 min 9 sec)

Posted by DavidMarderATL | Feb 11, 2013 @ 10:28 AM | 2,294 Views
Not that anybody is reading this, but I've redesigned the FPV copter completely. Although I liked my original (see previous blog posts), I thought I'd have less trouble tuning with the arms in a more perfect "X" configuration. I've sent it out to be cut on the waterjet, so hopefully in a couple weeks I'll be building it! I'm looking forward to flying it.

In the meantime, I've been practicing flying the old quadrocopter (nicknamed Steve). I'm getting pretty good... I can do all kinds of cool banking, fast turns, etc.; now I just have to learn how to do flips! The better I get at flying, the more fun it is. Practice makes perfect!

February Flying (3 min 27 sec)

Posted by DavidMarderATL | Jan 15, 2013 @ 10:46 AM | 2,266 Views
So, for my next project, I'm designing an FPV copter. Again, I'm using aluminum because it gives you a super rigid frame that takes sudden impacts with the ground pretty well (not that I'm planning on having that happen, but... you know). Anyway, I'm scavenging from my old quad to build this guy... Here's a little video of the 3d render that I made. If you like it, and you want the autocad dwg files, I'd be more than happy to share. Hopefully I'll have it cut and put together in the next month or so, depending on money/time/patience.

3dFPVCopter (0 min 8 sec)

Posted by DavidMarderATL | Nov 08, 2012 @ 09:08 AM | 2,696 Views
Some technical details:

NTM 35/36, 910kv Motors
Turnigy Plush 30a ESCs
12x3.8 props
Turnigy 9x tx

I designed the body frame parts in autocad and cut them from 1/16" aluminum (T6) on a water jet machine at Georgia Tech.

Custom made camera gimbal with separate tx/rx system for full 360pan, 180 tilt, and 180 roll. I designed it entirely in Autocad, and had all of the parts custom cut on the water jet machine. It's surprisingly light! And it will hold a camera up to 7 lbs. I have a feeling that flight time is considerably affected at that point though. I'm still working out the kinks; I need to drop some cash on something with a little more power for the roll servo; this one is jittery and having trouble keeping it stable.

In one picture, you can see only the legs/gimbal next to our quadrocopter... and I thought that thing was tall. This machine dwarfs it entirely.