Frame design at Beta stage that might need improvements and re-design. Here's some design background:
Basic "Sphinx of Giza" design is inherited from the bigger brother, True X, top battery, Split(Mini) and no props video, mixed with cage construction which is quite popular recently.
Challenge is that the new Split Mini has a two story stack, which needs to be separated with FC/ESC to keep the profile low, resulting the fore-alt layout. Gyro may not be in center of thrust but with modern technology, flight controller doesn't care much, while I'm at it I might just add extra set of holes to accommodate HGLRC Zeus, also giving it the butt shaped rear end.
Due to raised edges of the cage, securing battery with velcro might not be a viable option, thus the angled battery end stop portion. A top plate is added since the cage could twist/bend but I didn't want one extra standoff in the middle.
Standoffs are already a bit too many since I was thinking every interface slot needs to be squeezed to be secure, plus 2 around the lens for extra protection, bad things WILL happen when top battery mixed with elevated lens, don't ask how I know... as the gentlemen at facebook pointed out I might just take the advice and remove some of them.
Photos
Part List
Frame |
KRD HD25 Carbon Parts ONLY (PROTOTYPE)
Armattanproductions.com
|
$26.49 |
Flight Controller |
ARTOWER Mini ARF4-SVTX F4 Flight Controller Integrated OSD 48CH 200MW VTX For RC Drone FPV Racing
(3 builds)
Banggood.com
|
$44.99 |
ESCs |
20x20mm BS-28A 4in1 2-4S BLHELI_S ESC Support PWM Multishot Oneshot DSHOT 4.1g for RC FPV Racing Drone
(8 builds)
Banggood.com
|
$25.99 |
Motors |
4pcs Gemfan 1105 7500KV Brushless Motors for Micro FPV Racing Drone Mini Quadcopter Multirotors
(2 builds)
Amazon.com
|
$46.99 |
Propellers |
4 Pairs Gemfan Flash 2540 2.5x4 2.5 Inch 3-Blade Propeller with 1.5mm Mounting Hole
(171 builds)
Banggood.com
|
$4.11 |
FPV Camera |
RunCam Split Mini FPV Camera / HD 1080P 60 FPS Recorder
(57 builds)
Getfpv.com
|
$79.99 |
Receiver |
FrSky Ultralight XM Receiver Up To 16CH for RC Drone FPV Racing
(71 builds)
Banggood.com
|
$11.99 |
I want this frame sooooo bad.
attemped to maiden last week, Split power input connected to battery pads - unflyable noise, don't have suitable caps so I moved the power leads to FC video 5V pads
split refuse to power up from USB power, which is normal, surprusingly, neither 2S :(
with 3S packs seems working normally, but my current 3S packs are too big, need to pick up some from LHS
Today I went flying with my friend, this is a new spot he found so we bring some micros to try out the place.
Flew few packs on a 1.9" micro and I tried this out, I guess this is not maiden...yet? If it's the usual riverbank I fly I would do some tricks.
needs some tune on the roll axis
the trees got so many ghost branches so I was very conservative at the throttle, didn't really test out power but I think it's adequate for general fun flying, I would say definitely not racing material
Could you stretch the top plate and elevate where it fits into the side rails (while lowering the back 'standoff') It's really nice to have a solid top plate for a battery so you don't worry about messing up a battery with a failed flip ;)
did you mean the tabs?
Anyway,
if I'm redrawing the frame I will omit 2 standoffs in front/rear of battery tray, and raise up the lower ones to spread the force needed to hold the plates, while reducing weight, also slightly lengthen the top that the butt is more upright shaped
not too sure about how to not ruin the bacttery when crashed upside down, in fact I did crash battery down when I flew another micro, from height like 3 story tall, the battery dented a bit at the corner but still very flayable, but FC and a motor died lol
I really like this concept. Do you have any footage from the Split to share?
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This looks very nice! Would you consider doing a V2 which has a completely flat back, so the battery could hang over if need be?
Thanks, yes the battery stop feature will probably be gone in the proper version, I figured silicone pad and/or velcro are thick enough to touch the battery, so the stopper are no longer necessay.
BTW, here is a new test flight footage