Carbonbird 3950kv 2205 Race Motor 275w 25g CW/CCW - for Knife 200

Product Description

275w 25g FPV motor with wide 22mm stator 2205 provides lite-weight and high torque - for 200mm class 4" HQ tapered props category - This new 2016 motor features thicker CNC shell case on the bell - to resist impact from FPV

Question - Whats the difference between the 2203 125w Red, and this 2205 motor on a Scarab Knife 200 - which is best? It's a good question - this 2205 motor has larger magnets and is crash hardened - able to handle a lot more AMPS - more watts - the down side is it will suck the LiPo faster - here is the comparison data for the 2203 vs 2205 - same prop shows the power:weight ratio of a 480g drone at 100% throttle achieves 3:1 over a lower 2:1 for the smaller 2203

the Race motor (below) produces 510g thrust - compared to the std motor above

Above - KarlosVonTrap flies the Scarab Knife 200mm Quad with these 2205 motors and 5x4.5x3 props

Specifications

KV 3950
Configuration 12N14P
Stator Diameter 22mm*5mm 2205
Shaft Length 10mm (for prop and 8mm ø nut)
Shaft Diameter 5mm/M5
Motor Dimensions(Dia.*Len) Φ27×15mm bell (motor 27mm height including Prop shaftPA)
Motor Mounting - 12mm Ø M2 (Warning - make sure screws do NOT penetrate the windings)
Weight (g) 25g with prop nut fitted (PA is integrated in design)
ldle current(10)@10v(A) 0.6A
No.of Cells(Lipo) 4S on 4" prop ; ( check Amp limits below)
Max burst current LIMITS (A) 3 secs 16 amps - 15sec cool down at mid throttle <7 amps
Max. efficiency current (2-8A)>83%
internal resistance 0.150 Ω

Includes

1 x Carbonbird™ 3000kv red 2205 Motor ; 25mm wires ; nil GBC (can be used CW or CCW) - for Knife 200mm size drone

1 x M5 Nyloc nut ; for 9mm tool ø (tool excluded)

Note : see photos

For BLHeli 14.4 or later using 18 or 20a OPTO -> on 4S be sure to set DEMAG to high - further info HERE - set timing to MED-LO
best suited to these 4" props HERE

Motor care and set-up

apply 1 small drop of Oil to bearings every 3 hrs with a syringe & dulled-down-needle ; use 20W50 new clean motor oil
DO NOT pull on the lead wires - not ever
Do NOT bend lead wires back and forth - risk breaking
Use short M2*5mm screws (excluded) - long screws will go in too far and CUT the windings !!! - risk - cutting insulation
Avoid hard impacts / Striking the motors - sudden impact can damage a motor if dropped / impacted /crashed - the magnets may be damaged / loosened

My motor suddenly stutters - was ok before? - Cut throttle - don't fly - Motors/ESC won't just stop by magic unless they are damaged/wiring compromised by mis-use

Motors are wound Delta - so each GBC has a pair of 2 small inner wires ; most likely one thread has been broken-pulled-bent internally if the wrong (too long) screws did not cut the windings
use a DMM http://www.carbonbird.com/products/uni-t-pen-sized-dmm
check the internal resistance Ω between all 3 input wires - 2 at a time - 3 readings should be identical 0.150Ω - what do you get Ω?
check to see if a lead wire has been broken - pulled - snapped off inside - visually look in
Noobs often mistake a motor problem for what is actually a broken ESC - physical damage to the ESC from man-force/crashing - make sure you have not broken your ESC

In some instances people have damaged their motors by letting FOD enter, something ferrous/magnetic get sucked inside by magnetic attraction force, from their work bench - then when they spin it up with the FOD spinning around inside :( (foreign object - damage) thereby cut the windings - be very careful with FOD

QUESTION - One of my motors stops before the others on shut down? How can i adjust it?

the shaft depth can be set any time in a few secs - this controls the friction setting - by varying the distance slightly between the circlip end and the grub screws (2)

a slight difference in friction has no real effect on flying - but can be set any time if needed

leave the motor connected to the copter - prop and all
- use a 0.05" hex tool - undo the 2 black grubs 1 turn CCW -
loosen the axial play of the bell by 1/1000" (freeplay) - pull the bell slightly out toward the prop
re-tighten the 2 grub screws.

Excludes

Excludes Props - Study the trust data - recommended props are the HQProp 5x4 ; or the HQProp 5x4x3 also works well - choice of props depends on Total weight. If you want this motor to perform best keep your Quad under the weights in the Quad column for 50% throttle. Remove weight. Be careful not to over prop or exceed amp limits above.
Excludes bolts - normally use the shortest bolts to sure the bolts dont penetrate the windings M2*5 Here
Excludes tools - a 9mm socket wrench/spanner is recommended to tighten the red nyloc nut ; grub screw 1mm hex (only required for full dis-assembly)
Excludes training - if you don't understand brushless motors - pls read the above

Warranty

Do not exceed power burst limits above - Do not operate in dirt/dust - 1 year return to Carbonbird factory - Warranty specifically excludes damage caused by exceeding max amps limits or crashing, incorrect use of tools, incorrect pulling/breaking of lead-in wires, mis-use or poor lubrication of bearings* - claims for factory warranty require return of the product to us - at buyers shipping expense, for inspection - the decision of returns inspector is final.

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