PWM frequency:
Code revisions from Rev32.9 and on support variable pwm frequency where the pwm
frequency is controlled by motor RPM. This mode is called “By RPM”.
This mode can be invoked by setting pwm high frequency to maximum.
By letting pwm frequency be controlled by RPM instead of throttle, some artifacts that can
arise from throttle control can be alleviated.
Demag Compensation:
Code revisions from Rev32.9 and on also support a setting called “Very High”, for which
power is cut even more aggressively.
Generally, a higher value of the compensation parameter gives better protection.
If demag compensation is set too high, maximum power can be somewhat reduced for some
motors.
Low RPM Power Protect:
Code revisions from Rev32.9 and on have a mode called “On Adaptive”. This setting is
intended for large low kV motors running on a fairly low battery voltage. But it can be used,
and is indeed suitable for any motor kV and battery voltage. In this mode, the code calculates
the kV*voltage and adjusts the low rpm power protection accordingly
Stall protection:
Code revisions from Rev32.9 and on have a tweak to the relaxed stall protection mode, where
there is no boost on startup for this mode. So if you are flying with really low throttle and the
motors stop e.g. due to reverse flow, then they will just gently start up again on the low
throttle.
You can download the BLHeli_32?suite from here:?https://github.com/bitdump/BLHeli/releases
Warning! Updating the firmware of almost any device can lead to the device being bricked or broken. You should carefully think before updating and taking the risks.??
]]>OpenTX 2.3.12 was released a few weeks ago and shortly afterwards 2.3.13 followed. There are a lot of fixes and improvements in this version, but the most interesting is Synced pulses (also known as CRSF Shot). This version includes synchronization between the mixer and the data sent to module that has been successfully tested for several month in TBS and ImmersionRC specific builds. OpenTX version 2.3.12-13 is also the version that supports Jumper T-Lite and Radiomaster T8 Pro radios.
How to update the firmware of the OpenTX radio: Guide: How to update OpenTX firmware
TBS has released the “full size compact” radio called Mambo. This was expected to be released as some info was leaked earlier (see new post Weekly news & new products: Week 38). Mambo radio transmitter comes in standard and Ethix special edition.
More about TBS Mambo radio is here: TBS Mambo radio with Tracer inside
AxisFlying release 2.5inch sized AirForce PRO X8 octocopter. It has 8 (octo!) pieces 1404 size 4510KV brushless motors, Matek System F722 Mini SE Flight Controller, AxisFlying 30A 4in1 ESC, Runcam Nano 2 FPV Camera and 600mW VTX or Caddx Vista Nebula Nano HD FPV system.
It is the first 2.5inch X shaped octocopter. It is capable of carrying full size GoPro for areal video shooting.
Air Force PRO X8 comes in analog and digital FPV versions.
Available @:
Banggood: https://www.banggood.com/search/axlsflying-airforce-pro-x8.html
AxisFlying: https://www.axisflying.com/?s=AirForce+PRO-X8
NeutronRC has announced their ExpressLRS 900MHz receiver. Receiver size is only 10x18mm size. Unavailable yet.
Happymodel discontinued ES915TX and released new ES900TX 915(868)MHz transmitter module. Now it comes with JR box and the cooling fan. Also the main STM32 chip was replaced with the ESP32 chip and backpack ESP8285 WiFi chip was added.
Also Happymodel discontinued ES915RX and released new ES900RX receiver. New receiver is smaller, lighter and now it can be updated via WiFi (because STM32 chip was replaced by ESP32 chip).
All the differences between old and new transmitters and receivers can be found in this table.
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DarwinFPV also released the 3 inch 1S FPV quadcopter. It looks very much like HGLRC Rekon 3 quadcopter, only the frame is printed from nylon. Probably “inspired” by Rekon 3. DarwinFPV 3inch 1S quadcopter weights 58 grams and is lighter than Rekon 3 that weights 63 grams. 3 inch props are spun by 1103 12000KV motors.
Available @ Aliexpress (-6$USD coupon “I23MIS9P7RMC”): https://s.click.aliexpress.com/e/_9INl8o
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FETtec released new 2004 size and 2104 size motors. Both motors comes with 1800KV ratings and are clearly made for 6S operation.
FETtec Motor FM2104M
Specification sheet: https://fettec.net/media/pdf/85/8c/19/FM2104M-1800.pdf
Available @ FETtec: https://fettec.net/shop/fettec-motor-fm2104m-1800kv-wahlweise-quadmovr-edition
FETtec Motor FM2004T
Specification sheet: https://fettec.net/media/pdf/1b/b9/2e/FETTEC-2004-1800KV.pdf
Available @ FETtec: https://fettec.net/shop/fettec-motor-fm2004t-1800kv
LDARC (aka as KingKong) release entry level radio transmitter EX8. It supports Futaba, Frsky D16 EU/LBT and FCC protocols.
Available @ https://shop.makerfire.com/collections/new-arrival/products/ldarc-kingkong-ex8-8ch-radio-controller
Source: Facebook, Instagram
]]>OpenTX 2.3.11 was released a week ago, but I somehow missed that event. The most interesting change is that the OpenTX developers managed to get the separate dedicated USB ID and from now on there will be no more issues with the joystick driver for simulators.
Read more and download here: https://www.open-tx.org/2021/01/08/opentx-2.3.11
Read more about the “BETTER_USB_DEVICE” issue with simulators: OpenTX Radio not working in simulator issue fix
Guide on how to update the OpenTX firmware: Guide: How to update OpenTX firmware
OpenTX developers have announced that the Jumper T-Lite radio will be supported in the upcoming OpenTX 2.3.12 release.
HGLRC in collaboration with Dave_C (David Cledon) introduced the new Long Range brand called REKON FPV (www.rekonfpv.com). Their first quad is called REKON 5 and is based on the Dave’s design.
REKONFPV are also offering interesting failsafe insurance. Basically you can pay insurance fee and if you loose your quad you get the new one for the half of the price.
BetaFPV released the fourth (!) generation of their F4 20A AIO toothpick FC. This FC now has F405 MCU and BLHeli_32 ESC. This version has more UARTS and plug and play ports for receiver and DJI Digital VTX.
https://betafpv.com/products/toothpick-f405-2-4s-aio-brushless-flight-controller-20a-blheli_32-v4
iFlight has released updated XING motors. New color, new design, new specs, new sizes.
XING2 2207: https://shop.iflight-rc.com/index.php?route=product/product&path=20_26_148&product_id=1464
Moblite6 weights only 18.6g and Moblite7 weights only 19.5g.
The overall stripped off design of the whoop reminds… the skeleton, but the total flight time is greatly improved.
Fun fact – the 2 bladed propellers in the photo of the Moblite7 are made from the 4 bladed HQProp propellers by cutting off the two blades… I wonder what propellers will the production Moblite7 is going to have.
Moblite6 and Moblite7 will be using the new Happymodel DiamondF4 flight controller with built in SPI Frsky receiver and built in 25-200mW VTX. The Frsky receiver has IPEX antenna connector and comes with a normal dipole antenna.
The total weight of the DiamondF4 flight controller is only 3.42g (antennas excluded).
Original idea of this whoop belongs to the Mr. ShutterBug (Nate Payne):
And the first flight video of the Moblite7:
Release date: TBD, Frsky version ~ December 20, Flysky version ~ January 10
Available @:
Makerfire (5% discount code MFRMoblite)
Moblite6: https://shop.makerfire.com/collections/new-arrival/products/happymodel-moblite6-brushless-drone
Moblite7: https://shop.makerfire.com/collections/new-arrival/products/happymodel-moblite7-brushless-drone
Banggood (10% discount code “BGaFf10oFf“)
Moblite6: https://www.banggood.com/18_5g-Happymodel-Moblite6-65mm-1S-Diamond-F4-AIO-…-1785239.html
Moblite7: https://www.banggood.com/19_5g-Happymodel-Moblite7-75mm-1S-Diamond-F4-AIO-…-1785250.html
Moblite6 Specifications:
Item Name: Happymodel Moblite6 1S 65mm ultra light brushless whoop
Wheelbase: 65mm
Size: 80mm*80mm*25mm
Weight: 18.5g (without battery)
Weight: 26g (with Original 1s 300mah Lipo battery )
Features:
The lightest 1s 65mm brushless whoop
Powerful and efficiency
The lightest 1s AIO 5IN1 F4 flight controller
New Unibell EX0802 brushless motors
VTX power switchable 25mw~200mw
Low profile Canopy design
Package includes:
65mm Frame (Mobula6 frame)*1
Option1: DiamondF4 FR built-in SPI Frsky receiver*1
Option2: DiamondF4 FS built-in SPI Flysky receiver*1
EX0802 KV19000 Unibell brushless motor*4
Gemfan 1219 31mm propeller(4cw+4ccw)*1
Runcam Nano4 Lite*1
Built-in 5.8G 40ch 25mw-200mw VTX*1
1s 300mah Lipo battery *2
1S USB charger*1
Propeller disassemble tool*1
Screwdriver*1
Happymodel Carry case*1
Moblite7 Specifications:
Item Name: Happymodel Moblite7 1S 75mm ultra light brushless whoop
Wheelbase: 75mm
Size: 97mm*97mm*25mm
Weight: 19.5g (without battery)
Weight: 36g (with Original 1s 650mah Lipo battery )
Features:
The lightest 1s 75mm brushless whoop
Powerful and efficiency
The lightest 1s AIO 5IN1 F4 flight controller
New Unibell EX0802 brushless motors
Low profile Canopy design
VTX power switchable 25mw~200mw
Package includes:
75mm Frame*1
Option1: DiamondF4 FR built-in SPI Frsky receiver*1
Option2: DiamondF4 FS built-in SPI Flysky receiver*1
EX0802 KV19000 Unibell brushless motor*4
HQPROP 40MMX2 propeller(4cw+4ccw)*1
Runcam Nano4 Lite*1
Built-in 5.8G 40ch 25mw-200mw VTX*1
1s 650mah Lipo battery *2
Propeller disassemble tool*1
Screwdriver*1
Happymodel Carry case*1
Motor
Model: EX 0802 19000KV
Configuration:9N12P
Stator Diameter:8mm
Stator Length:2mm
Shaft Diameter:Φ1mm
Motor Dimension(Dia.*Len):Φ10.5mm*14.9mm
Weight(g): 1.7g
No.of Cells(Lipo): 1S only
Flight controller
(Frsky SPI RX version) DiamondF4 FR FC Firmware target: CrazybeeF4FR
MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
Sensor: MPU-6000 (SPI connection)
Original whoop size compatible
Power supply: 1S battery input (DC 2.9V-4.35V)
Built-in 5A(each) Blheli_S 4in1 ESC Dshot600 ready
Built-in Betaflight OSD(SPI Control)
Built-in 5.8G VTX
Built-in SPI Frsky/Flysky receiver
Built-in 5V 1A BEC
Onboard 4in1 ESC
MCU upgraded to EFM8BB21
Power supply: 1S LiPo/LiPo HV
Current: 5A continuous, peak 6A (3 seconds)
Support BLHeliSuite programmable
Factory firmware: O_H_50_REV16_8.HEX
Default protocol: DSHOT600
Onboard Frsky SPI D8 receiver Version
SPI BUS receiver Frsky D8 compatible
Compatible Non EU transmitter D8 model
Channels: 8ch
Failsafe support
No ground interference ( Transmitter and receiver 1 m from the ground): 200m~300m
Onboard 5.8g VTX
Output power: 25mw~200mw switchable
Frequency: 40CH
Input voltage: 3.3V 5.5V
Current consumption: 300mA(type)
Frequency: 5.8GHz 5bands 40 channels(include Race band)
Smartaudio ready
Runcam Nano4 Lite
Model: RunCam Nano4 Lite
Image Sensor: 1/3″ CMOS
Horizontal Resolution: 800TVL
Lens: 2.1mm(M8) FOV 160°
Signal System: PAL/NTSC Non Switchable
S/N Ratio: >50dB
Electronic Shutter Speed: Auto
Auto Gain Control (AGC): Auto
Min. Illumination: 0.01Lux@1.2F
D-WDR: Auto
Day/Night: Color
Power:DC 3-5.5V
Current: 170mA@5V 180mA@3.3V
Housing Material: ABS
Net Weight: 1.0g
Dimensions: L14mm*W12mm*H9mm
Lipo Battery Moblite6
Capacity: 300mAh
Voltage: 3.8v
Continuous Discharge Rate: 30C
Size: 57mmx12mmx7mm
Weight: 7.5g
Connector: PH2.0
Lipo Battery Moblite7
Capacity: 650mAh
Voltage: 3.8v
Continuous Discharge Rate: 30C
Instantaneous discharge rate: 60C
Size: 60mmx18mmx8mm
Weight: 16g
Connector: PH2.0
]]>
New version of the OpenTX 2.3.10 was released. Well actually was released more than month ago, but thought it’s worth mentioning. This OpenTX version has ImmersionRC Ghost and the FrSky FRM302 2.4GHz LoRa modules support, but no CRSF Shot support yet. This version also has a number of other improvements and changes.
See the change list here: https://www.open-tx.org/2020/10/06/opentx-2.3.10
Guide on how to update the OpenTX firmware: Guide: How to update OpenTX firmware
iFlight announced the two new cinewquads ProtTek25 and ProTek35. Protek25 is 2.5 inch sized cinequad, has Xing 1404 motors and Nazgul 2525 propellers. ProTek35 is 3.5inch sized cinequad, has Xing 2203.5 motors and Nazgul 3535 props.
iFlight:
https://shop.iflight-rc.com/index.php?search=Protek&submit_search=&route=product%2Fsearch
Banggood:
https://www.banggood.com/search/protek25.html
https://www.banggood.com/search/protek35.html
NewBeeDrone new 20×20 stack Cricket200
https://newbeedrone.com/products/cricketstack
Cricket200 Flight Controller F7 Spec:
Cricket200 ESC Spec:
New motors from Happymodel. Unibel design 0802 size motors for whoops and new trending 1404 size motors for long range miniquads.
T-Motor has updated Velox motors. Now they have “Smoother Operation”, Better prop grip and are “More durable”.
Might take a while for the Velox V2 to appear in the shops:
https://www.getfpv.com/catalogsearch/result/?q=T-motor
https://www.racedayquads.com/search?type=product&q=t-MOTOR
https://pyrodrone.com/pages/search-results-page?q=t-MOTOR
Caddx is teasing with the upcoming Digital FVP camera. This time it will have 120fps refresh rate on 720p resolution. Lets hope it will be significantly better than Nebula.
![]() Aerolite 2004 1600KV
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![]() Aerolite 2004 2400KV
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Datasheets:
Ummagawd Aerolite 2004 16000KV
Ummagawd Aerolite 2004 2400KV
Ummagawd talks about these motors:
BTW somehow these motors disappeared from the Ummagawd website now. Lets hope they will return back. Motors are back on store.
Links (Online):
https://ummagawd.com/products/ummagawd-aerolite-2004-1600kv-motor
https://ummagawd.com/products/ummagawd-aerolite-2004-2400kv-motor
Info from the website: “With the advancements in digital HD FPV and regulations pushing our hobby to lighter and lighter weight restrictions, I decided it’s time to expand our knowledge and development into building a proper lightweight freestyle quad. While others are diving completely into the “build the lightest thing at all costs”, I wanted to take a more thought out approach. With a target AUW of ~300g, I exhaustively searched, tested, tweaked, and finally found my ideal lightweight 5″ motor.
The motor/prop combo determines how an aircraft will move its weight. For me, a freestyle quad must perform well stabilizing itself in demanding situations, pull out of a dive at the last second, or respond without hesitation to abrupt acrobatic maneuvers. Obviously, this means the right motor, controlling the right prop, spec’d for a specific all up weight.
After testing a range of stator sizes and KVs, I’ve come to the conclusion that a 2004 is the smallest size for a 5″ lightweight prop and that 300g AUW target… but it has to be light weight. So to make the motor as light as possible, I worked with the engineers at the factory to test all options. We made the motor mount use only 2 screws to secure, and thus reducing any extra weight from the base. The bell is perforated with slotted cutouts to reduce rotational mass. This adds to the motors ability to rapidly change speed, similar to the effect of lighter props. To further reduce rotational mass, strong, yet lightweight titanium bolts are supplied to secure T-mount props. Because the prop shaft simply doesn’t need to be as long as other motors it has been reduced to 1.5mm. And finally… after begging other motor factories… we now have the worlds first (on a 5 inch) “ribbon” motor wires! This will make that ultra clean build without even trying. I didn’t want to build just “any” 2004 motor, it needed to be special.
The KV choices here come from testing 6s and 4s setups and lightweight 5″ props. This test was simple: “Pull out of a building dive at the very last second… inches from the ground.” Whichever did this best, was the winning choice. I found that 1600kv on 6s was MORE than enough to accomplish this. So 1600kv it is… and with a 6s 450mah battery and HQ 5×3 bi-blades… you’ll find yourself getting 5-6min of blissful flights with enough power to put a huge smile on your face. The 2400kv is for the 4s folks with similar power to the 6s setup but with the power shifted to the top end. If you’re looking for a motor for your 4inch setup, the 2400kv also happens to be perfect motor for a 6s heavy 4″ prop… if that’s your thing.
Recommended Props:
HQ 5×3 (for a super smooth and stable experience, great for max flight times, snappy acro moves, and windy conditions)
HQ 5x2x3 (for that “on rails” feeling at the cost of slightly less prop wash handling and less flight time)”
]]>
Red Cat (the owner of FliteTest.com and Rotor Riot) has acquired the FatShark. Are these the bad news or good news only time will tell. Maybe this will help the Fatshark to push their SharkByte digital FPV system into market.
See the news posts: https://finance.yahoo.com/news/red-cat-acquire-fat-shark-100000583.html
Also you’ll see the discussions popping up in the various social media.
NewBeeDrone has released the second version of their brushless whoop. This one has improved BeebrainBL V2 AIO Flight controller with Build in VTX and SPI Diversity Receiver. Yes, it has 2 diversity RX antennas for increased range. Also this board has 12A mosfets with JESC ESC firmware preloaded, current and voltage sensors, programmable LEDs.
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Custom Betaflight firmware for Beebrain Brushless V2 FC can be found here: https://github.com/newbeedrone/BeeBrain-Brushless-V2/releases
Another toothpick from Happymodel, but this time it is following the trendline with the 1202.5 motor size and lower cell count battery 1-2S. Has trendy Insta360 mount and newest Caddx Ant Lite camera.
Available @ https://www.banggood.com/41g-Happymodel-Crux3-115mm-…-1-2S-3-Inch-Toothpick-…-1749947.html
SCPMAKER has released the new 1505 size motor for cinewhoops and 4″ inchquads. Actually this motor was released a few weeks ago, but it was released so silently that nobody noticed.
Available @ SPCMAKER: https://spcmaker.com/products/g1505-3450kv
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Available: nowhere ATM.
Source: Facebook, Instagram
]]>BLHeli Suite is powerful program for flashing, setting up and configuring your BLHeli or BLHeli_S ESCs.
There a several reasons you may need to use the BLHeli Suite (or BLHeli Configurator). This is list of some:
BLHeli Suite is the most feature rich application for setting up the BLHeli and BLHeli_S ESCs. It is still maintained and time to time is updated. BLHeli Suite runs only on Windows platform. (BLHeli_32 Suite however is available on Win, Linux and MacOS platforms)
BLHeli Configurator is simpler, but user friendlier than BLHeli Suite.
BLHeli Configurator Chrome App is the same BLHeli Configurator, just it was originally distributed only as Chrome App. BLHeli Configurator Chrome App was last updated in the 2017. So this Chrome app is probably is abandoned. But it works and might be sufficient for you.
I would recommend the BLHeli Configurator for beginners and BLHeli Suite for advanced users.
You can download the BLHeli Suite (also the BLHeli_32 Suite) from here: https://www.mediafire.com/folder/dx6kfaasyo24l/BLHeliSuite
You can download the BLHeli Configurator Cross-platform application from here: https://github.com/blheli-configurator/blheli-configurator/releases
No special installation is required. You just need to unzip the contents of the BLHeliSuitexxxx.zip to any folder you want.
Start BLHeli Suite. Select the interface “SILABS BLHeli Bootloader (Cleanflight)” if you are connecting to the ESC via the flight controller (ESC is connected to the FC). Then select the port number that the flight controller is connected to and hit Connect button.
If you have sucessfuly connceted to the ESC, then the next step is reading the settings of the ESC or ESC’s. Hit the Read Setup or
The result will be shown in the dialog box.
In BLHeli Suite you need to connect to the ESC, then Read Setup and change the Motor Direction by moving the slider to the position 2 (Reversed).
Don’t forget to hit the Write Setup after you’ve made the changes. Have in mind that BLHeli Suite writes the changes for the selected ESC, so you need to select or unselect the ESC below.
Otherwise BLHeli Suite will write only to the first (master) ESC.
In BLHeli Configurator you can also change the Motor Direction by selecting Normal or Reversed (Bidirectional and Bidirecitional Reveresed is used for 3D setups).
]]>Team BlasckSheep Tango 2 is going to be supported on the official OpenTX soon! Here is the pull request to merge the FreedomTX to the OpenTX 2.4 branch: https://github.com/opentx/opentx/pull/7931
There is also a hint that TBS is working on some transmitter called Mambo. Here is the screen shot of the TBS Mambo transmitter screen:
iFlight has released Chimera4. It is a new trending type of 4inch Long Range quadcopter just like the Flywoo Explorer HD. It has Caddx Nebula digital FPV system.
Available in two motor options – 3000kV for longer cruising and 3800kV for more speed.
BrotherHobby released DXA 2207.5-1750KV/1920KV motors for 6S batteries. They look nice, but heavy @ 36.2g.
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T-MOTOR has released the 1303 size motor with 5000KV for 3S battery. It’s designed for 3″ inch toothpick style (lightweight) quads.
https://www.banggood.com/T-Motor-F1303-2-3S-5000KV-Brushless-Motor-…-1745318.html
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Lumenier designed the double AXII2 antenna for goggles. Lumenier claims they have more than doubled the gain from 2.2dB to 4.7dB. This antenna has made some funny comments on FB and Instagram.
https://www.getfpv.com/lumenier-double-axii-2-long-range-5-8ghz-antenna-lhcp.html
HQProp has made the new 75MMX5 propeller for cinewoops.
Source: Facebook, Instagram
]]>Lets take a closer look at the Arthur 1408 3650KV motors.
These motors have 14x8mm size stator, comes in two KV options 1700KV and 3650KV. Motors can have 5mm prop shaft or 1.5mm shaft with prop T-mount. While the “classic” 5mm size shaft is more popular, the T-mount with 1.5mm size shaft is gaining more popularity these days and more props are released for this prop mount type.
Motors come with 4pcs of M2x6mm screws with hex socket head. Hex socket size is very small, my guess is 0.8mm and I happen not to have such hex wrench tool (allen key). You will have to find the small allen key or just find the other M2 screws with the more common 1.0mm hex socket size. I thought I need to mention.
Motor has so called “Open Base” design. This design reduces the motor weight due to smaller base and enables better cooling.
Although the advertising says that this motor has arc magnets, in fact they are just straight ones.
You can see it by yourself – magnets are not curved, just straight rectangular. My guess it is just error in the ad.
Arthur 1408 motors have long 110mm length 26AWG wires. Should be enough for any frame
The weight of the motor is 15.6 grams with wires (for comparison Diatone Mamba 1408 – 18 grams). The weight will be lower once you’ll trim the wires.
All four motors weight 62.4 grams with full length wires.
I have tested this motor on 4S battery with 3″ inch props with T-mount. Props are Gemfan 3018 2-blade, Gemfan 3016 3-blade, HQProp 3×2 2-blade, Gemfan Windancer 3028 3-blade, Emax Avan 3 inch and HQ 3x3x3.
Here is the results datasheet: https://docs.google.com/spreadsheets/d/e/2PACX-1vQuSqa0H8u0q0hqwpKmNPnPD1pj5KxMrI6_UGFTn7Ltr-XW9VHUJAqHxbgbna6bOCcZJ008-E_gqCAL/pubhtml?gid=1740459082&single=true
An the max thrust test results. Bars are max thrust (g), line is efficiency (g/W):
FlashHobby Arthur 1408 motors are budget priced, build quality is good. According to the thrust tests they are average performers – not super efficient and not super powerful.
These FlashHobby Arthur 1408 motors is good option for 3 inch quads or 3 inch cinewhoops. You may want to choose the 5mm shaft version of this motor, but there are more and more 3-inch propellers with t-mount. Gemfan even has universal props with both prop mount options. I would recomment Gemfan triblade props for maximum efficieny anf flight time.
Available @
Banggood:
1.5mm and 5mm shaft: https://www.banggood.com/Flashhobby-Arthur-Series-A1408-1408-2800KV-2-6S-or-3650KV-2-4S-Brushless-Motor-…-1707177.html
FlashHobby
1.5mm shaft: https://www.flashhobby.com/index.php?id=3536
5mm shaft: https://www.flashhobby.com/index.php?id=3537
Disclaimer: This item was supplied by FlashHobby for a fair and unbiased review. FlashHobby never asked for a positive review and never influenced my opinion in any way. I’m trying my best to stay uninfluenced and give only my own opinion. All affiliate links if there are any help me purchase items for future reviews and tests.
]]>