Rootstone's hobby collection

2024년 6월 4일 화요일

The limits to growth

My review

https://m.blog.naver.com/jos77/223457735288

2020년 3월 13일 금요일

WLtoys RC airplane F949 Brushless Upgrade

WLtoys F949 stock motor's lifetime is about 10 hours.
For my case, it was about 3 months , 20 times of flying. Motor become old and weak, It can't fly anymore.
I wanted longer lifetime of my first RC plane, and found upgrade to brushless motor is the best way.

With many failures, I finally made it.

For Brushless motor wiring, I read CapnBry's post on RCgroups (https://www.rcgroups.com/forums/showthread.php?2244563-WLtoys-F949/page56) and followed it.
F949 stock receiver's 3ch port is for brushed motor. (2 pin)
Electric experts might know how to use it, but I don't know how to convert its signal to brushless properly :(
So I used 4ch port (3pin , PWM) of f949 stock receiver, as a main throttle channel, and changed transmitter's left stick direction.
And after I upgraded to brushless motor, the plane become faster and heavier , so front landing gear should be more strong.
I customized with ball pen refiller as main post , it was strong and light.

Motor : 1104 8700kv brushless motor
ESC : XP-7A ESC

Total weight : 58g -> 67g
Minimum cost : about $40

Brushless motor need more electric power, 3.7V 500mah stock battery is not enough to fly long time. Flight time become short. (20min -> 7min)
But with 2 batteries wiring parallelly, flight time is almost 14minutes. I think it's ok.

Enjoy flight on my youtube channel !(https://www.youtube.com/channel/UC2NrcTCf1SLrpiDaUPHO46Q)

2018년 10월 17일 수요일

WLtoys RC airplane F949 review

My first RC airplane , WLtoys F949 Review

Specs from manufacturer
- WLtoys F949 Airplane
- Flight time: 25 minutes
- Charging time: 40-60 minutes
- Frequency: 2.4 GHz
- Transmission range: 200 meters
- Weight: 58g
- Dimensions: 500 x 393 x 192 mm (WxLxH)

In box (RTF)
- 1x WLtoys F949 Airplane
- 1x LiPo Battery
- 1x Propeller (+1)
- 1x Manual
- 1x USB Charger
- 1x Remote Controller
- 1x Screwdriver

I bought it from aliexpress
https://www.aliexpress.com/item/WLtoys-F949-Radio-Control-RC-Airplane-3-Channels-2-4GHz-Fixed-Wing-RTF-CESSNA-182-Plane/32869276425.html

When goods arrived, box was damaged, pressed and wing curved. :(
But I tried to fix it with my hair dryer, and it can fly very well now :)

Review

- The most attractive point is long flight time. Actually, play time is more than 30 minutes (about 4~5 minutes x 5~6 times flight) , it is very compatible with other drones average 7~9 minutes flight
- Price is cheap. All other RC airplanes are above $150 or kid toys. Best quality at this price ($50~$80 at aliexpress)
- Weak. it often needs parts replacement. For me, propeller broken first flight. (but in box , there was extra propeller, so I didn't buy new parts yet)
- Lift power lacks. Airplane is about 58g. But just a small wind make it can not fly. (even I throw it with my hands, it can fly few seconds just as by motor power)
- FPV is not suitable. Of course, in internet, many people do FPV on F949 (so do I) , but with very just few weight of FPV camera and transmitter (about 15g~20g), F949 power could not fly. I think F949 itself was not designed for FPV... So many various trial customization to install FPV is on going (and it is still interesting).
- Skill needed for flight. Not like drone, airplane should have high speed to fly without stop. And transmission range is just only 200m! So keeping flight needs making it turns and turns roundly. (or it will go somewhere far away)

I bought it 3weeks ago, and from that day I fly it everyday now. (except bad weather)
In internet, there are too many manias and experts to customize F949 (with brushless motor , it had more power and long flight time , and somebody even made flap on it!)
I don't think F949 is just a kid toy, it can be customized and upgraded to more powerful RC airplane (even compatible with $200~$300 RC airplane).

good RC and good information for everyone :)

2015년 6월 20일 토요일

[TIP] RC controller receiver binding

http://blog.naver.com/jos77/220379057525

Radio controller for RC is also important part (and expensive).

Few days ago , my RC controller range become very short, about 10 meter
(It was almost 100 meters or over)

By web searching , I found out it's my receiver problem.
So I changed only receiver with same manufacturer and do binding, and it works good.

(For FLYSKY product radio controller)

To do binding , binding pack is needed.

I don't have (or maybe I lost) it, so I made it.

It's simple. With any line terminal with same size (3-line) jack (just like servo line extension) , connect the left and the right line.

1. Power off the controller / receiver

2. Connect binding pack to receiver 3CH (maybe different for other model)

3. Power on the receiver

4. Power on the controller with "BIND" button pressed

5. Power off the controller / receiver , and pull out the binding pack

6. Power on and test

good RC and good information for everyone :)

2015년 6월 11일 목요일

[Tip] RC ESC / Motor

http://blog.naver.com/jos77/220379050080

ESC (Electronic Speed Controller) and motor are the most important parts of RC.

(And it's expensive)

As for beginner , we should check it's brushed / brushless.

(image from google)

Brushed motor : shaft is coil and it has brush for electric supply. Magnet is around the coil
Brushless motor : shaft is magnet and coil is around the magnet

Brushed motor for offroad and rock crawling.
Brushless motor for high speed.

I don't know more detail :)
First, I used brushless , and I'm using brushed for now but I can't feel the difference.

But important for beginner :

Brushed motor is 2 lines
Brushless motor is 3 lines

and ESC setting :

1) power on radio controller
2) power on ESC with setting button pressed - it will beep continuously
3) Stop state (do not touch controller) - press setting button - beep 1 time
4) Forward state (pull the trigger) - press setting button - beep 2 times
5) Backward state (push the trigger) - press setting button - beep 3times
6) power off all and power on again - complete

good RC and good information for everyone