View Single Post
Old 12-21-2021, 05:24 PM
  #1  
JayTee
New Member
 
Join Date: Dec 2021
Posts: 5
Default 250 Watts? In this size?

Coming from 72mHz and slope soaring in the 70's and 80's, I'm still getting my feet wet with electric. Just when I think I'm starting to get it, something surprises me. Thought I was starting to figure out some basics on brushless motors, i.e., watts/ounce for basic, sport and 3d flying. Just bought a motor and paid more attention to the wattage, that the size. This thing is micro compared to some of the other motors I'm dealing with. It's a GARRT F2204-1800KV. Here are the specs they list for it:

Motor KV 1800RPMV
Idle Current (Io/10V) 0.45A
LiPo Cell 2-3S
Weight 21Gm
Max Cont. Current 18A
Max Cont. Power 220W
Configuration 12N/14P
Motor Resistance .1495Ohm
Stator Dia. 22mm
Stator Thickness 4mm
Motor Dia. 27.6mm
Motor Body Length 19.8mm
Bolt Hole Spacing 31.5mm
Bolt Thread M2
Propeller 7"/8?


8V 8038 Prop
Throttle Amps Watts Thrust Efficiency g/W
50% 2.83 22.6 173G 7.64
60% 4.86 38.9 262G 6.74
70% 6.89 55.1 337G 6.11
80% 10 80.1 412 5.14
90% 12.1 96.8 461 4.76
100% 12.4 99.4 466 4.69

12V 8038 Prop
Throttle Amps Watts Thrust Efficiency g/W
50% 4.61 55.5 330 5.97
60% 7.57 90.8 449 4.94
70% 11.9 142.7 555 3.88
80% 16.1 193.2 634 3.28
90% 18.6 222.8 655 2.94
100% 19.6 234.6 675 2.87

I honestly did not pay attention to the size when I bought it; it's about the size of a slim men's watch! Are these power numbers realistic? Or is it just going to use a lot of juice delivering the wattage?


I can use it on another project that needs a smaller motor, so it's not a loss if it's just not that capable.

Thanks!

John
JayTee is offline  
 
Page generated in 0.05570 seconds with 7 queries