Bought a hummingbird, built a bumblebee?
Last year when I got into this stuff I bought a Kingkong95GT to fly around my yard (garden, for you across the pond). I had a LOT of fun with it, but the combination of FPV camera, VTx, and no OSD left a lot of room for improvement as far as what I saw through the goggles. So, got a hankering to build a little guy to add to my yard fleet and got taken with the name of the frame . . . hummingbird. I could just imagine this little thing quietly zipping around my yard. Turns out when you throw some big motors and camera in, it starts to feel a little more substantial than a hummingbird, so I'm starting to think of it more as a bumblebee . . . the kind of thing that probably shouldn't be able to fly, but ends up doing a fine job of it.
First 2" build for me so it was a little tighter than I am used to. I thought I was super-smart getting the Emax Magnum F3 because it had the buzzer convenietly built into the FC, but then ended up needing to remove it to make room for the VTx! I didn't want to go without a buzzer, though, because there were several times I almost lost my Kingkong and would have saved a heap of time with a buzzer, so I ended up putting wires on it and placing it behind the stack.
All things considered I think I got it buttoned up fine. Normally I would be a little more artistic with the Rx antenna, but for just flying around the yard I find placement is not crucial, really just need to do what's easiest. I wish I could get a bit of camera angle adjustment, but for this type of flying the near-zero angle is okay. Weight came in at 85g (127g with 3S 450 mah battery) so hoping it still has a bit of zip. Props are just for the photo shoot, will likely switch to some 4-blade Gemfan 2035, but will defnitely give these awesome-looking tri-blades a go.
Weather has been poor, so no chance to maiden, but hoping to get her up in the air in the next few days. Hope you enjoy it.
Frame |
GEPRC GEP-HX2 Hummingbird 110mm Micro Frame
Goodventuredrones.com
|
$16.90 |
Flight Controller |
EMAX F3 MAGNUM MINI FPV TOWER SYSTEM
Goodventuredrones.com
|
$45.99 |
Motors |
4 x EMAX RS1106 Micro Brushless Motor (1 pcs)
Goodventuredrones.com
|
$51.96 |
Propellers |
HQProp T2 2X2.5X3 Red (2CW + 2CCW)
Goodventuredrones.com
|
$1.50 |
FPV Camera |
RunCam Micro Eagle
Goodventuredrones.com
|
$44.99 |
FPV Transmitter |
Eachine ATX03 Mini FPV Transmitter w/ Audio
Goodventuredrones.com
|
$13.99 |
Receiver |
Frsky XM SBUS Micro Reciever
Goodventuredrones.com
|
$10.99 |
Batteries |
Tattu 3S 450mAh Lipo 75C with XT30 plug
Goodventuredrones.com
|
$11.86 |
I did a similar build and it was tight fit (RIP, smashed it into a ghost branch), how did you secure the VTX to the flight controller? Also - did you use lower profile standoffs for the ESC's?
update: tried the props in the build and I like them okay, tried Avan 2" 4-blade and did not like them much, definitely had a few instances of wicked propwash on sharp 180 turns. FIinally went with gemfan 2035 4 blade and will likely stick with them. Motors were warmest with them, but not dangerously warm, I believe.
The angle is really just a few degrees, and I'm not sure how much fiddling I would have to do to be able to bring it up more. I'm a little worried about it. The other 2" I flew had a very shallow, fixed camera angle and it was fine. I'm hoping I feel the same way once I see this flying through the goggles. It may be as simple as moving the cam forward past the protection of the frame, then I can get more angle as well as the risk of damage. Anyway, time will tell.
Hi, I m building a similar one, same frame and 1106 4500 kv emax. How many kv are your motors? Have problems of oscillation or propwash? I had to made soft mount for motors due to hard vibs
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Is this a m2 mounting hole or m3 mounting hole for hardware and fc?
Is the stack a m2 or m3?
The stack is definitely M2. Not home at the moment, but 95+% sure the clearance holes on the frame are for M2 because I would have thought a lot about how to keep the stack from wiggling if they were M3, but it was not an issue during build (hope that makes sense).