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 RC Flying Models V4, radio controlled aircrafts

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zeroglyph
post May 20 2016, 02:13 PM

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QUOTE(QiW @ May 20 2016, 01:31 PM)
i clicked in the link
i read the few reviews that it had underneath
2 drones flew away by themselves ...
hopefully yours has no such issues la
*
haha....yeah, not the most reliable sweat.gif . but it came with the quad, don't really have a choice.

p/s:
i got screwed by gearbest. they send me an incomplete and faulty quad. thank goodness there's paypal

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This post has been edited by zeroglyph: May 21 2016, 12:28 PM
zeroglyph
post May 26 2016, 09:29 AM

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QUOTE(QiW @ May 26 2016, 06:12 AM)
u can buy those 4 x AA chargers
or
better still ... buy those nitecore chargers the vapers use for their lithium batt ... oso can use
try nitecore i4 or d4 ... charges 4 batts at once
look around ... they are going pretty cheap locally now
*
just be sure it's compatible with nimh. not all li-ion charger can charge nimh. nod.gif
zeroglyph
post May 27 2016, 10:14 AM

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if i want to diy a quad with GPS flight capability(eg, position hold, hover hold, RTH) what kind of FC do i need?

http://www.banggood.com/Mini-NAZE32-SP-Rac...-p-1021113.html <-- something like this?

http://www.banggood.com/Naze32-Flight-Cont...f-p-953849.html <- and this?

http://www.banggood.com/EMAX-Skyline32-Naz...t-p-981145.html <-- and this?

i'm mainly looking for possibilities for altitude and position hold. what are the minimum specs that i need on the FC?
zeroglyph
post May 27 2016, 10:48 AM

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QUOTE(QiW @ May 27 2016, 10:33 AM)
for  what u want ...
FC must have baro compass and gps as well as the usual gyros and accelerometers la

cheapest that comes to mind is the APM tongue.gif
*
thanks
magnetometer is basically the compass, right ?

if i just want hover hold, i don't need the GPS module, right? FC with barometer is enough?

i'm planning on a sub 300 frame(250-280), so the whole GPS thing might be a little too cramp. so trying to isolate the functions sweat.gif .

This post has been edited by zeroglyph: May 27 2016, 10:48 AM
zeroglyph
post May 27 2016, 12:25 PM

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QUOTE(QiW @ May 27 2016, 12:12 PM)
yes ... magnetometer is compass ... this is for direction of the aircraft is pointing at la
gps is for position of aircraft
baro is pressure sensing ... for altitude control

if altitude is all u need then go for rev 6 naze32 la .. it has baro already and that board is ez to tune and set up
or any board that has a baro la .. lol
your above choices are good oso
...
*
great, great. thanks! it seems i'm on the right track then. thumbup.gif
zeroglyph
post Jun 19 2016, 01:35 AM

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QUOTE(josh5671 @ Jun 19 2016, 12:39 AM)
Bro...help me take a look this spec...see its ok bo?
because at battery there I meet problem, all high C battery mostly are HXT 4mm bullet
Turnigy Graphene are too expensive...

Will this battery, 5.2Ah 10c typical, 20c burst can hold this spec quadcopter?
http://www.hobbyking.com/hobbyking/store/_..._Lipo_Pack.html
Hobbyking SK450 Glass Fiber Quadcopter Frame 450mm
Dead Cat Conversion Kit for SK450 Quadcopter Frame
Turnigy Multistar 30 Amp BLHeli Multi-rotor Brushless ESC 2-6S V2.0
Sunnysky X2212 980kv Brushless Motor
Hobby King Quadcopter Power Distribution Board Lite
Multistar XT60 to 4 x 3.5mm with JST Plug Quadcopter Distribution Harness
3 Pairs Nylon 10x4.7" 1047 1047R CW CCW Propeller
DJI Naza Lite Version Flight Control System
Turnigy Graphene Professional 4000mAh 3S 15C LiPo Pack w/XT60
Turnigy 9X 9Ch Transmitter w/ Module & 8ch Receiver (Mode 2) (v2 Firmware)
HobbyKing 1500mAH LiFe 3S 9.9v Transmitter pack
Futaba Plug to Banana Plug Charge Lead Adapter
4mm HFT Male to XT60 Female Connector Adapter Converter
ZIPPY Flightmax 5000mAh 3S1P 20C
*
i can't say much about the rest, as it is custom. but the batteries are not gonna cut it. 30A ESC x 4 will bloat the batteries you've chosen in no time. especially with aggressive flying. from my own experience, even a 20C constant cheap batt won't hold that good on a LAMA coax with extreme 180 motor.

i'd suggest 25-30C constant, with a good batt eg turnigy, zippy and the likes. if you want to use some cheaper batt, get higher C rating.

for connectors, i think you can request HK to swap for you, for a fee of course. else, DIY.
zeroglyph
post Jun 21 2016, 09:05 AM

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QUOTE(josh5671 @ Jun 20 2016, 04:49 PM)
I already bought two 10c....by acidently...
I planned to get another two  15-30c 4Ah. 30 dollar each.
now I got problem on Fc, transmitter and motor. I not sure wan follow my build list or pick another one...

4s I got planned.. I need larger motor low kV and larger props..
But the frame too small.
*
10c are used for transmitter, not for flying. flying need at least 20C minimum IMO. unless, the craft is really2 light(rotor-ed) or winged.

4s only makes the motors spin harder = better response. no real need to use it unless you have a reason to. no real need to swap components if already supported either.
zeroglyph
post Jun 21 2016, 02:37 PM

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QUOTE(josh5671 @ Jun 21 2016, 01:21 PM)
.....
Two 30c 3a will be enough? High c rate battery too heavy.

And I got problem on most battery. Because they using HXT 4mm bullet...not xt60
*
not really, higher mAh makes the batt heavier. higher C doesn't really add weight. 3000mAh batt would be heavy indeed, yes.

heavier craft requires more power, why not just reduce weight so you don't actually need more power? like using a 2200mAh batt. with the weight offset, it'll probably has about the same flight time.
zeroglyph
post Jul 13 2016, 09:48 AM

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finally:
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done with this thing. had to learn both librepilot and cleanflight for this as it comes with a CC3D, but i'm upgrading to SP racing f3. without any tuning, the SPRF3 is definitely superior and more stable. very minimal oscillation. worth the price. thumbsup.gif

next plan:
1. tune
2. add gps & OSD
3. profit! rclxm9.gif
zeroglyph
post Jul 14 2016, 02:28 PM

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i can't seem to find a simple direct answer for this, so better ask around.

i want to increase the yaw rate for my quad with cleanflight. how much of an increment stepping should i go with? and how are the increments measured? default is 0.00. so should i go by 0.20, 1.50, 10.00 etc?
zeroglyph
post Jul 14 2016, 09:07 PM

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QUOTE(QiW @ Jul 14 2016, 04:41 PM)
from 0.0 to 0.30 is already very significant change
*
ok, great thanks. .3 is exactly how much i added at the moment. haven't tested it yet.

how is it measured btw, i know in librepilot it's deg/sec. it's the same for cleanflight or is it just a multiplier?
zeroglyph
post Jul 15 2016, 09:19 AM

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QUOTE(QiW @ Jul 15 2016, 01:21 AM)
i dont have a true correct answer for u
but based on my experience with cleanflight .. its more of a multiplier
*
i'm guessing the same as well. since the numbers don't make sense laugh.gif

thanks for your valuable input, as always thumbup.gif
zeroglyph
post Jul 16 2016, 12:25 PM

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QUOTE(akchang @ Jul 16 2016, 11:02 AM)
Here's my race quad...
*
you should fix the batt connector soldering to avoid mishaps. nod.gif
zeroglyph
post Jul 22 2016, 11:47 AM

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some questions on alt hold with cleanflight. how does the throttle supposed to behave? i managed to get it to work, but once i touch the throttle, things go wonky. so once i engaged alt-hold i shouldn't be touching the throttle at all? will have to remap my toggle switch if it is so.
zeroglyph
post Jul 29 2016, 04:31 PM

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QUOTE(ZZR-Pilot @ Jul 29 2016, 03:17 PM)
Hello all, I'm about to take the plunge into the RC world. Been wanting to do this since Standard 4, but you know life has its priorities... and RC flying was priority #17263.

So 35 years later, here I am.

I hv decided to start by building a quadcopter since it seems to be the least threatening to fly, especially with a GPS-equipped flight controller. But before I start throwing money buying all the bits and pieces, I need some advice from you senior guys:

What radio should I buy?

My requirements are:

1) Not clunky like the toy-grade ones with the nasty buttons, dip switches and hollow plastic shell that break when a noob like me tosses it around.

2) Has battery voltage telemetry, to save myself from crashing the quad because I won't know how to gauge how much juice I have left.

3) Has a 1km range at least, so that I won't outgrow it when I check out FPV flying later on.

4) 2.4 ghz, so that it won't interfere with 5.8 ghz transmitters in the future.

5) 7 channels at least, so that I can control camera gimbals in the future.

6) Costs around RM550 at the most.

I'm thinking the RadioLink AT10, but I'm hoping maybe you seniors know of better options..?
*
welcome to the money wasting world laugh.gif . i'll give a few measly thoughts.
in my view, 4 brushless are quite threatening(the sound, mostly). my kids will start running when i fly my quad inside the house, but they can pretty much follow my honey bee around. laugh.gif

on the GPS, i dont know of any diy FC that can handle GPS flight perfectly. at least not cleanflight and librepilot based FC. so if your concern is GPS RTH and stuff like that, better don't DIY and go for something like CX-20.

for TX, fs-i6 is pretty cheap and potentially awesome TX. it has a custom firmware that allows it to become a 10CH radio by using i-bus on the small fs-ia6b receiver. can also do craft voltage alarm. can't wait for my fs-ia6b to arrive so i can try that mod. brows.gif 1KM range.....not sure about that. never tried going that far.

to be honest, if you've never flown, don't diy. buy something RTF. that way you can tell a correct flight characteristic from the wrong one. PID tuning is a PITA to get right.

This post has been edited by zeroglyph: Jul 29 2016, 04:36 PM
zeroglyph
post Jul 30 2016, 11:59 PM

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QUOTE(SupermotoXL @ Jul 30 2016, 09:41 PM)
APM based (ardupilot) flight controller handled GPS flight perfectly, already put hundred and thousand miles worth of mission on all my planes and my quads. Perfecto and cheapo. smile.gif  Of course you'll need to know how to program it. biggrin.gif

Btw don't by CX-20!  has lot of QC problem.  My buddy losses capacitor on ESC due cold soldering from factory and one of the motor shaft clips broke off from flight.  Similar reported at most multirotor forum.  Google it.
*
good info on the APM. might be useful for the future.

china stuff is a hit or miss thing. heard a few good stories on cx-20 and the other clones. depends on luck i guess. sweat.gif
zeroglyph
post Aug 9 2016, 09:33 AM

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wow, it works!

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zeroglyph
post Aug 11 2016, 10:26 AM

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QUOTE(ZZR-Pilot @ Aug 10 2016, 01:17 PM)
How much do they charge to ship LiPos here?
*
that depends on shipping method. usually it's not worth it if you just buy 1-2 lipo. better fill up the 1st 1kg for maximum profit. else, better just buy lipos locally. hobbyking sells quality lipos for cheap, but since our exchange rate sucks, the shipping is rclxub.gif .


on other news.......

i'm trying to get my HBFPv2 to use an fs-i6. got the fs-ia6 connected to the 3in1 and servos seems to work. however, the motors are acting weird.
- main motor works with throttle, but is somewhat not smooth.
- tail motor won't spin at all with throttle or rudder.

i'm doubt the fs-i6 is not smart enough to control a honeybee, so it must be me not knowing how to get this right? anyone has any idea what i need to configure on the fs-i6 to get the motors working correctly?

This post has been edited by zeroglyph: Aug 11 2016, 10:27 AM
zeroglyph
post Aug 22 2016, 09:16 AM

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QUOTE(blurjoey @ Aug 22 2016, 08:50 AM)
Gearbest having XK brand sale today at 12pm...

Hope can grab the X251 today for US$69.99 laugh.gif  laugh.gif  laugh.gif
*
had bad experience with them, will never buy again. please use paypal to be safe. nod.gif
zeroglyph
post Sep 9 2016, 05:26 PM

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QUOTE(akecema @ Sep 9 2016, 05:19 PM)
bro
can explain about your li-ion battery
how much max discharge your battery?

i though wanna build 1 li-ion battery
but i check my battery (xiaomi powerbank battery) only 1.5c max discharge
*
li-ion has lower discharge rate than lipo..by a lot. it's usable with winged flyer, as the motor doesn't draw too much current too fast. won't work too well with rotor-ed flyer as these types of flyer draws a lot of current quickly to create lift and thrust at the same time. in summary:
planes/gliders/fixed wing: can work with li-ion if you are not too aggressive with the throttle
heli/multi rotor: won't work too well. throttle will be sluggish at best.

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