diff --git a/content/blog/03_quadrocopter_en.md b/content/blog/03_quadrocopter_en.md index d9b854f..d2f441d 100644 --- a/content/blog/03_quadrocopter_en.md +++ b/content/blog/03_quadrocopter_en.md @@ -4,108 +4,130 @@ author: Philipp Schönberger tags: bataflight, quadrocopter, fpv category: projects -Infected by the other members of the Toolbox e.V, especially [Thomas](https://www.xythobuz.org/) -I started to search for parts for a quad copter which could be used to race and do some -freestyle moves. +Infected by the other members of the Toolbox e.V, especially +[Thomas](https://www.xythobuz.org/) I started to search for parts for a quad +copter which could be used to race and do some freestyle moves. -Since for me also the assembly is new and I had the feeling that this quad will also be -likely to be damaged I wanted to build it with separate components. Also its more fun that way. +Since for me also the assembly is new and I had the feeling that this quad will +also be likely to be damaged I wanted to build it with separate components. +Also its more fun that way. -Since I did not want to have a huge quad I wanted to hit the 250g Law limit for the assembly. -In such a case I would not even be forces to add a burn resistant name tag to the quad, which I -would anyway recommend if it could be lost. +Since I did not want to have a huge quad I wanted to hit the 250g Law limit for +the assembly. In such a case I would not even be forces to add a burn resistant +name tag to the quad, which I would anyway recommend if it could be lost. -After some search i found the [Diatone quad frame GT M3](https://www.banggood.com/Diatone-2018-GT-M3-130mm-Normal-X-FPV-Racing-Frame-Kit-RC-Drone-3mm-Arm-p-1257062.html) -pretty appealing since they have a aluminum cage for the PCB stack and a 3mm carbon plate which is robust enough for a beginner. +After some search I found the +[Diatone quad frame GT M3](https://www.banggood.com/Diatone-2018-GT-M3-130mm-Normal-X-FPV-Racing-Frame-Kit-RC-Drone-3mm-Arm-p-1257062.html) +pretty appealing since they have a aluminum cage for the PCB stack and a 3mm +carbon plate which is robust enough for a beginner. [lightgallery - /images/quad/diatone_130.jpg, Diatone 2018 GT M3 130mm Source: www.banggood.com + /images/quad/diatone_130.jpg, Diatone 2018 GT M3 130mm Source: www.banggood.com lightgalleryend] -The following motors where selected by taking the recommendations of the frame into account: +The following motors where selected by taking the recommendations of the frame +into account: motorsize 1408 motorr 4000KV -The motor size of brush less motors for quad copters are regularly indicated by a 4-digit number -The first two digits represent the stator width or diameter while the second ones represent the hight. -The values types are in mm +The motor size of brush less motors for quad copters are regularly indicated by +a 4-digit number. The first two digits represent the stator width or diameter, +while the second ones represent the hight. The values types are in mm. In general the motor size have quite a influence of the flight characteristics. -A taller motor most likely result in more power at the upper Throttle/RPM and a wider motor -would result in a higher torque at low throttle. +A taller motor most likely result in more power at the upper Throttle/RPM and a +wider motor would result in a higher torque at low throttle. -Since I wanted to use motors with a actual data sheet or at least a test measurement how much thrust and -amps would be drawn with certain types of propeller I did take a look at the -[T-Motor F20II F20 II 1408 3750KV](https://www.banggood.com/T-Motor-F20II-F20-II-1406-3750KV-Brushless-Motor-2-4S-For-130-140-150-FPV-Racing-Frame-p-1154351.html) +Since I wanted to use motors with a actual data sheet or at least a test +measurement how much thrust and amps would be drawn with certain types of +propeller I did take a look at the [T-Motor F20II F20 II 1408 3750KV](https://www.banggood.com/T-Motor-F20II-F20-II-1406-3750KV-Brushless-Motor-2-4S-For-130-140-150-FPV-Racing-Frame-p-1154351.html) -The where the ones which had a lot of thrust with 532g when they are mounted with 3040 propeller types. -The goal of the quad would be to be below 250g so the thrust to weight ratio would be 1:8 for a quad copter. +The where the ones which had a lot of thrust with $532g$ when they are mounted +with 3040 propeller types. The goal of the quad would be to be below $250g$ so +the thrust to weight ratio would be 1:8 for a quad copter. [lightgallery - /images/quad/motor.jpg, T-Motor F20II F20 II 1408 3750KV Source: www.banggood.com; - /images/quad/motor_datasheet.jpg, T-Motor F20II F20 II dimensions Source: www.banggood.com; - /images/quad/motor_datasheet2.jpg, T-Motor F20II F20 II electrical specification Source: www.banggood.com; - /images/quad/motor_datasheet3.jpg, T-Motor F20II F20 II load specification with diferent propellor sizes Source: www.banggood.com; + /images/quad/motor.jpg, T-Motor F20II F20 II 1408 3750KV Source: www.banggood.com; + /images/quad/motor_datasheet.jpg, T-Motor F20II F20 II dimensions Source: www.banggood.com; + /images/quad/motor_datasheet2.jpg, T-Motor F20II F20 II electrical specification Source: www.banggood.com; + /images/quad/motor_datasheet3.jpg, T-Motor F20II F20 II load specification with diferent propellor sizes Source: www.banggood.com; lightgalleryend] -At this point the Motors and Frame where clear. The next step was to choose a propeller type. -For this I selected the three bladed one with close to the 3040 size. The only ones which are quite near to this are the Geprc 3042 -The Number of the Propellers are also representing the size nearly as the motor identification number. -The first two digits are the diameter in inch and the second two ones are representing the pitch of the propeller. +At this point the motors and Frame where clear. The next step was to choose a +propeller type.For this I selected the three bladed one with close to the 3040 +size. The only ones which are quite near to this, are the Geprc 3042. +The number of the propellers are also representing the size nearly as the motor +identification number. The first two digits are the diameter in inch and the +second two ones are representing the pitch of the propeller. -The Pitch is sometimes misunderstood. There are 2 value types of the propeller blade. -The actual meaning of it is the forward movement of he propeller if it's rotating 360 degrees. This value is calculated in inch. -So if the upper propeller would be measured this schema the 3042 would represent the diameter as 3 inch and the propeller is moving 4.2 inches forward. +The pitch is sometimes misunderstood. There are two value types of the +propeller blade. The actual meaning of it is the forward movement of the +propeller if it's rotating 360 degrees. This value is calculated in inch. +So if the upper propeller would be measured this schema the 3042 would +represent the diameter as 3 inch and the propeller is moving 4.2 inches forward. -However there exists also the measurement of the angular pitch. This value is common for props which have a non constant angle in order to compare them more easily. -The conversion from one to the other is pretty simple and can be found the in formula below. +However there exists also the measurement of the angular pitch. This value is +common for props which have a non constant angle in order to compare them +more easily. The conversion from one to the other is pretty simple and can be +found the in formula below. $$ p_{inches} = tan\left( p_{angle} * d * \frac{m_{point}}{100} * \pi\right) $$ $$ p_{angle} = atan\left( \frac{p_{inches}}{d * \frac{m_{point}}{100} } * \pi\right) $$ -You can imagine the higher the pitch is the more air is moved and the more thrust it should generate with the same rpm. -Side effect of the higher pitch is a higher amp drawn thought. -So you have to be carefully which props you putting on the motor otherwise you could overload the motor and they could burn down +You can imagine the higher the pitch is the more air is moved and the more +thrust it should generate with the same rpm. Side effect of the higher pitch is +a higher amp drawn thought. So you have to be carefully which props you putting +on the motor otherwise you could overload the motor and they could burn down or the ESC can not handle that much amps. -In my case they are measured in degree so the forward pitch angle of $42°$ would result in a pitch blade of 5.09 inches. +In my case they are measured in degree so the forward pitch angle of $42°$ +would result in a pitch blade of 5.09 inches. [lightgallery - /images/quad/prop.jpg, Geprc 3042 Source: www.banggood.com; - /images/quad/prop_d.jpg, Geprc 3042 diameter in inch visualised Source: www.banggood.com; - /images/quad/prop_pitch.jpg, Geprc 3042 pitch in degree visualised Source: www.banggood.com; + /images/quad/prop.jpg, Geprc 3042 Source: www.banggood.com; + /images/quad/prop_d.jpg, Geprc 3042 diameter in inch visualised Source: www.banggood.com; + /images/quad/prop_pitch.jpg, Geprc 3042 pitch in degree visualised Source: www.banggood.com; lightgalleryend] -Now we have the motors and propeller selection finished and estimate the amp drawn through the ESC. -In my case this is 19.8A per motor or 312.64W. -The values of the ESC are also declared typical for each motor. Also the ESC has to work together with the flight controller. -Since [beta flight](https://betaflight.com/) already announced that an F3 chip is getting short on the flash I wanted a F4 board. The f7 boards would also work but I -did not see the benefit compared to the nearly double cost of a FC. +Now we have the motors and propeller selection finished and estimate the amp +drawn through the ESC. In my case this is $19.8A$ per motor or $312.64W$. +The values of the ESC are also declared typical for each motor. +Also the ESC has to work together with the flight controller. +Since [beta flight](https://betaflight.com/) already announced that an F3 chip +is getting short on the flash I wanted to grab a F4 board. The F7 boards would +also work but I did not see the benefit compared to the nearly double cost +of these types of FC. In the end I selected an [HGLRC 20x20mm Micro F4 Flight Controller](https://www.banggood.com/HGLRC-20x20mm-Micro-F4-Flight-Controller-AIO-Betaflight-OSD-5V-BEC-for-XJB-F425-F428-Series-Flytower-p-1203538.html) with an [28A Blhel_S BB2 2-4S 4 in 1 ESC](https://www.banggood.com/20x20mm-28A-BLheli_S-BB2-2-4S-4-In-1-ESC-Support-Dshot600-for-XJB-F428-F328-Series-Flytower-p-1203121.html) [lightgallery - /images/quad/HGLRC_XJB_F428_pinout_diagram.jpg,HGLRC XJB F428 Pinout Source: https://www.hglrc.com/ - /images/quad/HGLRC_XJB_F428_pinout_diagram_2.jpg,HGLRC XJB F428 Pinout Source: https://www.hglrc.com/ + /images/quad/HGLRC_XJB_F428_pinout_diagram.jpg,HGLRC XJB F428 Pinout Source: https://www.hglrc.com/ + /images/quad/HGLRC_XJB_F428_pinout_diagram_2.jpg,HGLRC XJB F428 Pinout Source: https://www.hglrc.com/ lightgalleryend] -Last but essential components are the video transmitter equipment. There are 2 aspect ratio available 4:3 and 16:9. -The choice is just based on preferences since you can also change the lens on the micro cameras and with it the field of view. - -I personally like 16:9 since its a more natural view for the eye. Therefor I selected a [runcam Sparrow WDR 700TVL](https://www.banggood.com/RunCam-Micro-Sparrow-WDR-700TVL-13-CMOS-2_1mm-FOV-145-Degree-169-FPV-Camera-NTSCPAL-Switchable-p-1198579.html) -As you can image the video is not even close to hd or even hd ready. The video is transmitted analog like the old analog satellite tv with round about -576i@25fps for PAL and 480i@29.97fps for NTSC. -This is the case since the video shall be with minimal to no delay transmitted, which is not typical for digital video signals. +Last but essential components are the video transmitter equipment. There are two +aspect ratio available 4:3 and 16:9. The choice is just based on preferences +since you can also change the lens on the micro cameras and with it the +field of view. + +I personally like 16:9 since its a more natural view for the eye. Therefor I +selected a [runcam Sparrow WDR 700TVL](https://www.banggood.com/RunCam-Micro-Sparrow-WDR-700TVL-13-CMOS-2_1mm-FOV-145-Degree-169-FPV-Camera-NTSCPAL-Switchable-p-1198579.html) +As you can image the video is not even close to hd or even hd ready. +The video is transmitted analog like the old analog satellite tv with +round about 576i@25fps for PAL and 480i@29.97fps for NTSC. +This is the case since the video shall be with minimal to no delay transmitted, +which is not typical for digital video signals. Therefore these quads are using typical analog video. [lightgallery - /images/quad/Cam-Micro-Sparrow-WDR-700TVL.jpg,runcam Sparrow WDR 700TVL Source: https://www.banggood.com/ + /images/quad/Cam-Micro-Sparrow-WDR-700TVL.jpg,runcam Sparrow WDR 700TVL Source: https://www.banggood.com/ lightgalleryend] For sending the captured video signal I chose a [TBS Unify Pro HV Race FPV Video Sender SMA - Team Blacksheep](https://www.team-blacksheep.com/products/prod:unify_pro_hv_race) -since this does less interference on other channels which Is required if you flying together with your friends. With the china VTX there is a high chance that they have interference if -he quad gets powered on. +since this does less interference on other channels which Is required if you +flying together with your friends. With the china VTX there is a high chance +that they have interference if he quad gets powered on. [lightgallery /images/quad/vtx.jpg,TBS Unify Pro HV Race FPV Video Sender SMA Source: https://www.banggood.com/ diff --git a/pelicanconf.py b/pelicanconf.py index 401e027..85002a0 100644 --- a/pelicanconf.py +++ b/pelicanconf.py @@ -141,6 +141,8 @@ SECTIONS = [ ('less plastic', '/category/plasticfree/', None), ('Gallery', '/gallery', None), ('about', '/about', None), + ('git', 'https://git.phschoen.de'), + ('cloud', 'https://nextcloud.phschoen.de'), ('Impressum', '/impressum', None), ]