Posted by Zr_Flyer |
Jun 13, 2013 @ 03:20 PM | 2,569 Views
I've had the parts lying around, for quite a while now..., to put together a FPV Quad and finally did it. The FC is a ST F3 Disscovery Board sitting on a breakout board from http://www.rcswift.com/catalogue/ it is running the flyingF3 code from Tau Labs. It is flying now, next is to add sensors and GPS and get into the UAV goodness.
Here's a pic from mid build , final build and flight video to follow.
My second mutation is an attempt at flybarless. Having a hard time getting the tail to stick, always need to give it some rudder to keep it straight. Not sure what to adjust to get the tail to hold with out it spinning wildly at zero throttle. Has some issues with TBE and without PID's on the stabilizer it probably will never be quite right. It's close to being a good flyer but still needs some adjustments.
Honeybee Kng swash
Skyartec BL250-4500KV main
Blade SR brushed tail
HobbyKing Orange RX 3-Axis Flight Stabilizer
I picked up a couple of 9104's in a package deal, saw what guys were doing with the 4 ch conversion and had to give it a try
First up is a brushed version. Flies pretty well but the swash rate and authority are pretty weak. I did get a bit more by adapting some 450 mixing arms for the flybar links. I think I'm loosing quite a bit of movement due to the angles of the links and am going to try to straighten them out some. Probably help to get some decent servos to replace the stock ones too. Blade CP main motor gets very hot but puts out plenty of power.
Orange dsm2 rx
lama IV swash
Blade CP main motor
Blade CP DD Tail motor
2x Esky 20a Brushed esc's
3S 1000mah 20c
Once (if) I can get the swash geometry worked out I'll probably build the second one with brushless motors.
Posted by Zr_Flyer |
Oct 28, 2012 @ 06:10 PM | 1,619 Views
Been a while since I've posted anything on the brushless SR 120, after frying the 5 in 1 I decided to go all out and replace everything, heh.
Today I finally got it flying
Runs on 2s, has a spektrum 6 channel rx, 4g servos, Brushless main and brushed CP tail with the blade cut down, gotta give Sax credit for coming up with the idea. Initial flights are very promising, hovers nice, no tbe, just need to trim it out mechanically and fine tune expo and stuff. I'll try and get some video soon.
Posted by Zr_Flyer |
Feb 20, 2012 @ 02:25 PM | 3,303 Views
I basically followed the MCPx brushless mod setup with a few minor differences. The mcpx uses a .3 Mod pinon (I think) but for the SR 120 we need a .4 Mod pinion. The mcpx guys swap to the SR 120 tail so we are good there.
There are a few different ways the mcpx guys are wiring things up, specifically where they are wiring in the theSteve converter. The easiest and they way I have it for now is to run the blue(-) and Yellow(+) soldered to a jst connector and plugged in where the brushed motor was. The red and white wires go to the servo plug of the esc and match the wire colors of the esc. The esc has a mini servo connector, I had some on hand so I used one to make the connection between the theSteve and the esc. For power the esc needs to be connected directly to the battery leads, the esc uses a walkera Micro Plug. I have some batteries that had the right female connector so I salvaged one and soldered the leads to the battery lugs on the 5-in-1 (this is the only permanent alteration to the electronics).
The current motor is from a walkera V100D. I just drilled some new holes and mounted it. Hard part is swapping the pinion gear. The shaft is 1.5 mm and easy to bend a pinion puller is required. Even then it's no picnic. If you can find a micro brushless without a pinion I'd recommend it.
I think I am way over geared, the pinion I have is a 14 tooth and I think it is overworking the motor which is too hot to touch after a few minutes of flight. The motor is a $5 used motor I got on ebay so it might of been overheating before. Now that I know this will work I'll probably buy a better motor. I need to try the resistor mod that the mcpx guys do to see if it smooths out the throttle curve at start up. I'll probably solder everything directly to the 5-in-1 to get rid of the plugs and extra wire.
Heli-Max Brushless ESC Novus FP/CP HMXM3005
HM-V100D03BL-Z-07: Brushless Motor for Walkera V100D03BL Helicopters (see issues above)
Female Jst (salvage)
Female walkera Micro Plug (salvage)