questions and suggestions on first quadrotor build

ccccc382

Member
hello everyone

i am looking for advice on my first build
i want to use it for fpv and photography after i have trained with flying normaly

the build consist of the following parts

motors
http://hobbyking.com/hobbyking/store/__12921__D2830_11_1000kv_Brushless_Motor.html X4

esc
http://hobbyking.com/hobbyking/stor..._Motor_Speed_Controller_SimonK_Firmware_.html X4

fc
kk2.1

frame
http://hobbyking.com/hobbyking/stor..._Frame_With_Crab_Landing_Gear_White_Red_.html
or
http://hobbyking.com/hobbyking/stor...SK450_Glass_Fiber_Quadcopter_Frame_450mm.html

battery

http://hobbyking.com/hobbyking/store/__10302__Turnigy_4000mAh_3S_40C_Lipo_Pack.html

props

http://www.hobbyking.com/hobbyking/...tandard_Rotation_2_pc_RH_Rotation_Black_.html X2 so X4 cw and X4 ccw



i will leave out the small parts like wires

question 1
wich frame should i chose

question 2
should i use other motors like 1100kv

question 3
could i make the build cheaper

question 4
what is a recommende budget reciever

question 5
is there anything i can do to increase flight time

thank you very much
 

G

...guest...

Guest
Wow. You could write a book on each of those questions lol. :nevreness:

Regarding radios, I would highly recommend the Turnigy 9x. In itself a very affordable controller. But slap on a Frsky transmitter module (I used DJT) and you will have a line of extremely affordable but very effective receivers at your disposal. In addition to the Frsky module, definitely flash it with er9x. Between those two modifications alone, you will have a radio setup that will rival setups many hundreds of dollars more. If you're new to this, don't worry so was I yet I was able to not just flash but also install an LED backlight and USB port to quickly do modifications to the radio controller.

I think what you need to concentrate on more if this is a photo / video platform is a camera gimbal to keep the camera rock steady regardless of your flight attitude. Personally, I never got along well with the eBay gimbals / DIY Martinez boards. After a couple botched attempts with those, I just got a 2-axis Tarot gimbal and called it a day.
 

ccccc382

Member
sorry for all the questions lol :nevreness:

but thanks for anwsering some of my question
i appreciate it

thanks
 

Drone1

Drone1
1400KV motor and 3 x 8" set of 4 propellers 2r 2l
HK 20A ESC (flash to SimonK)Get a flashing tool $6
KK2 FC
Power distribution board
2200mAh 50-70C batteries
Good quality Tx/Rx
Camera like the Mobius
Light strong frame x2 ( have to buy two because you will break it)
Set low PI gains for stable flight.
For get the gimbal at first and get some pics.

Cheap simulator and 2-3 hrs of practice.

You will break it if you do it right!
 

ccccc382

Member
what type of 1400kv motors do you suggest
and what would the flight time be (could not find the proper values in ecalc)

thanks
 
Last edited by a moderator:

PeteDee

Mr take no prisoners!
Everything above will work but apart from the Afro ESC's and the KK2 it really is the lowest quality you can get with all those components and you should seriously rethink your budget.

1. For a first quad choose a frame with integrated power distribution, much easier to set up.

2 Those motors use collet style prop adapters, they work but you are better off with a "short shaft" motor, if you want a motor that will give a huge performance and will last well get some SunnySky 2212 900-980kv and run them on 4S.

3. Don't cheap out, it leads to the dark side, crap in, crap out.

4. If you really do want to have a good experience then either grab a Taranis radio or pick up something like the Futaba T8FG used. If you buy cheap you and get a 9X you will have a second hobby of trying to get the damn thing to work properly.

5. 4S is the only way to go, you do not need packs rated at more than 30C, the Zippy Compact 3700 and 4500 are a good choice.

Cheers

Pete

5.
 


Drone1

Drone1
You work out the the c rating by matching the total possible current usage with the capacity of the battery x the C rating. 3S ~12V is easy and less trouble.

Quality is good but starting at the beginning is always sensible. If you buy a Phantom or a knock off, you will brake it and that will be the end. Build something and you can fix it and learn some more.
Good luck.
 

ccccc382

Member
well the tardanis wont be a option because for my budget( about 200-220 euros including transmitter and excluding charger) it is too expensive
i am think about buying a 9xR because it is the only transmitter available in my country


i have revised the build and i am limited to hobbykings european warehouse
frame
i am thinking of the sk450 from hobbyking
http://www.hobbyking.com/hobbyking/...ber_Quadcopter_Frame_450mm_EU_warehouse_.html
or
the x580
http://www.hobbyking.com/hobbyking/...Frame_w_Camera_Mount_585mm_EU_Warehouse_.html
or
http://www.hobbyking.com/hobbyking/...ber_Quadcopter_Frame_600mm_EU_warehouse_.html
or
any suggestions

motors
Turnigy Multistar 2213-980Kv 14Pole Multi-Rotor Outrunner
http://www.hobbyking.com/hobbyking/...Pole_Multi_Rotor_Outrunner_EU_Warehouse_.html

esc
afro 20 amp
or should i do 30a

fc
kk 2.1

props
any suggestions?
or should i buy a all sorts of props

transmitter
turnigy 9xR
http://www.hobbyking.com/hobbyking/...ansmitter_Mode_2_No_Module_EU_Warehouse_.html

should i get this module for the 9xr
http://www.hobbyking.com/hobbyking/...ack_for_JR_w_Telemetry_Module_V8FR_II_RX.html
[h=1][/h]battery
3s lipo dont know how much mah yet


now i have a question to ask
plz no hate on wanting to pay(dont like subscriptions)
could some one fill these setting in ecalc full version(normale doesnt have those motors) or advise me a program that has these motors
so i can do it myself

thanks
and any suggestions are welcome

greetings from colin(16 years old)
 
Last edited by a moderator:

Drone1

Drone1
LiFe batteries work well on Tx because you can run them flat.
You have to match the battery to ESCs to Motors to Props to the weight, or you won't get the lift for it to work. With what you suggest I would use 3 bladed 9" props.

Cheers.
 

ccccc382

Member
thanks for the tip about the LiFe batteries

and with the battery for the craft i am not sure wich will match the craft and i know you can get a estimate value with ecalc only those motors arent in ecalc

but thanks any way

anybody suggestion for a frame or wich one i should choose (like personale expirence or something else)

thanks everyone
 

TAZ427

Member
A few comments to maybe help as you seem to be all over the map in what you think you need.

LiPo Terminology:
- #S is the number of cells, each cell has a nominal 3.7V at the low end of operating. 3S -> 11.1V, 4S -> 14.8V ...
- #mAH is the number of milli-amps it can sustain for an hour (divide by 1000 to have the Amp rating for 1hr)
- #C is a factor of how much current can be delivered continuously safely. This factor is multiplied by the mAH ratting (for a 3300mAH 30C it's 30*3.3A or 99A.) They'll often have a second #C number such as 30-40C, in this case it can deliver 40*mAH ratting for short bursts (say 15-20seconds.) So this would drive a 4 20A ESCs w/o problem, 25A ESC you're on the hairy edge.

KV rating is the RPM per Volt of power applied (unloaded.) The motors are AC not DC and the voltage level controls the RPM, the ESC take the DC and turn it into AC but using a bunch of FETs to apply an 'additive' amount of voltage level in a sinusoidal pattern. But the loading is going to determine how much current draw is needed to maintain that RPM. A 4S battery is going to give you longer flight times than a 3S given the same mAH rating in general same power delivered at lower current and thus longer time to completely discharge the batter.

It won't hurt to get an ESC w/ too high of current rating, but it will hurt if you undersize it. Also, you want a battery that can supply the current.

For what KV rating you want to use and propeller size and pitch, that's going to depend a lot on do you want something that can lift weight, be acrobatic, etc.

In general higher KV are for smaller props or less pitch and run at higher RPMs and may not be so good for heavy quads,

Lower KV you want bigger props and higher pitch (they have more torque.)

There's not a magic formula that I'm aware of to match these out of the box. It's a balancing act, but you can look at stock kits that are out there and get good ideas of what works. The good thing about props is they're cheap, and you can experiment until you're content, batteries, ESC's and motors tend to be longer term investments. I'd be most concerned about not underpowering my batteries and ESCs and getting motors that are appropriate for the flying type you want to do. Though, I'd even consider getting a second set of motors at a different KV rating and playing with those as well.
 

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