My first iteration did not have an equal distance from the scale measurement point to the motor center point. This version does. It also moves on a real hinge to reduce movement friction and is a bit further from the ground to reduce ground effects.
Wednesday, December 30, 2015
Thrust stand V2
Having spoken with a few folks on RCGroups I rebuilt the thrust stand to get some more accurate results!
My first iteration did not have an equal distance from the scale measurement point to the motor center point. This version does. It also moves on a real hinge to reduce movement friction and is a bit further from the ground to reduce ground effects.
My first iteration did not have an equal distance from the scale measurement point to the motor center point. This version does. It also moves on a real hinge to reduce movement friction and is a bit further from the ground to reduce ground effects.
YKS MX2204 2300KV brushless motor review
I received two YKS MX2204 2300KV brushless motors for reviewing purposes. Needless to say that receiving them for free will not change my review. This will be my first motor review and I'm excited to dive into it! Being my first I don't have much to compare them to besides some Le Todar 2204 2300kv motors I'll also be reviewing and the Cobra 2204 1960kv motors I typically fly.
Specifications:
Model: MX2204
KV: 2300
Motor diameter: 27mm
Motor length (no shaft): 27.7
Stator diameter: 22mm
Stator length: 4mm
Shaft: 4.94mm
Weight: 21g
Batteries: 2-3 cells
No-load current: 0.6A
Top Mounting Holes: None
As with many brushless motors this size these are rated for 2-3s but since I fly 4s that's what I'll test them on.
Specifications:
Model: MX2204
KV: 2300
Motor diameter: 27mm
Motor length (no shaft): 27.7
Stator diameter: 22mm
Stator length: 4mm
Shaft: 4.94mm
Weight: 21g
Batteries: 2-3 cells
No-load current: 0.6A
Top Mounting Holes: None
As with many brushless motors this size these are rated for 2-3s but since I fly 4s that's what I'll test them on.
Thursday, December 10, 2015
DIY thrust stand
Being cheap I opted to make a DIY thrust stand out of some spare wood, a carbon fiber Nighthawk arm, and a hobbyking 30a ubec I had laying around. Hopefully my wife doesn't mind me using our kitchen scale! To show power usage I have an Electrify Powermatch power meter.
At a later time I'll be switching the hobbyking 30a ubec out for a littlebee 20a that I have on the way and eventually a Xrotor 20a or 40a. I'm doing this based on results provided on miniquadtestbench.com (http://www.miniquadtestbench.com/cobra-2300kv-hqprop-5x4-gf.html). A big thank you to Ryan for creating that testing site and posting his findings.
I would also like to test the difference between the stock hobbyking 30a and the same esc with the latest blheli flashed on it.
Here is my test bed for future motor reviews and thrust tests.
EDIT: 12-11-2015
I tested the stand yesterday with some readings that didn't seem accurate. I wasn't thinking about the leverage effect and failed to make sure the distance from the center of my motor to the pivot point is the same as the pivot point to where the arm meets the scale. I also see that in order to do that I need one single point of contact on the scale and not a giant block. I'll be fixing these issues tonight and testing it again.
EDIT: 12-30-2015
New stand!
Version 1: Needs tweaking!
At a later time I'll be switching the hobbyking 30a ubec out for a littlebee 20a that I have on the way and eventually a Xrotor 20a or 40a. I'm doing this based on results provided on miniquadtestbench.com (http://www.miniquadtestbench.com/cobra-2300kv-hqprop-5x4-gf.html). A big thank you to Ryan for creating that testing site and posting his findings.
I would also like to test the difference between the stock hobbyking 30a and the same esc with the latest blheli flashed on it.
Here is my test bed for future motor reviews and thrust tests.
EDIT: 12-11-2015
I tested the stand yesterday with some readings that didn't seem accurate. I wasn't thinking about the leverage effect and failed to make sure the distance from the center of my motor to the pivot point is the same as the pivot point to where the arm meets the scale. I also see that in order to do that I need one single point of contact on the scale and not a giant block. I'll be fixing these issues tonight and testing it again.
EDIT: 12-30-2015
New stand!
Version 1: Needs tweaking!
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