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Micro Outrunner Motor 4500KV made for 3.7 volt operation. We did some in shop testing on this motor with a 7.4V pack, GWS 2.5-.8 prop-.98 amps, 31,900RPM, 103F, pitch speed about 18mph. GWS 2.5-1 prop, 1.1 amps, 30,800 RPM, 105F, pitch speed about 22mph. Both of these props were run for 1 minute. We also tested with the GWS 3-2 props, the motor overheated quickly and was down about 12k RPM. DO NOT try to run a 3" prop on 2S here. Current and tach readings taking at start, temp reading at end. The motor seems stable to me with 2.5" prop 2S setups. Certainly in air loads would be lower. I am getting excited to design a Sub-Micro-Stick! Notice although the RPM seems way too high for indoor, the pitch speed is very modest. You should note that our testing indicates an amp limit similar to the manufacturers below. When we obtain the new single cell ESC, we'll do some similar testing to determine some useful setups for 1 Lipo. Specifications:
KV 4500
Voltage 3.7V
No load current 0.24A
No load RPM 16600 +/- 6%
Max continuous current 0.9A
Continuous RPM 10400+/- 6%
Resistance 1.18ohm
Dimensions 13 x 4.6mm
Shaft Dia. 1.5mm
Weight 3.5g
SKU Number: HEMICRO37V
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Micro Outrunner Motor 4500KV for 7.4 volt operation.
Use up to ~3-4oz models.
Specifications:
KV 4500
Voltage 7.4V
No load current 0.5A
No load RPM 33200 +/- 3%
Max continuous current 2A
Continuous RPM 21000+/- 3%
Resistance 1.18ohm
Dimensions 13 x 4.6mm
Shaft Dia. 1.5mm
Weight 3.5g
SKU Number: HEMICRO74V
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Micro Motor and ESC Set.
Micro Outrunner Brushless 5A Micro ESC, Speed Control and Brushless Micro Outrunner 3.5g, 3.7V. Temporarily out of stock
SKU Number: RRCMICROPFS37
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Micro Motor and ESC Set.
Micro Outrunner Brushless 5A Micro ESC, Speed Control and Brushless Micro Outrunner 3.5g, 7.4V. TEMPORARILY OUT OF STOCK
SKU Number: RRCMICROPFS74
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Brushless 5A Micro ESC, Speed Control for Single Micro Brushless Motors. Model HESC - 5A
Conn. Current 5A
Burst Current (>10s) 7A
BEC Mode Linear
BEC Output 5V / 0.8A
Battery cell Li-ion, Li-Poly 2 ~ 3 cell
NiMH, NiCd 5 ~ 9 cell
Balance Discharege Protection N/A
Weight 4.5g
Size (L x W x H) 24 x 12 x 6
SKU Number: HESC5A
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Spare Parts for Micro Outrunner Brushless Motors.
Replacement drive shaft, 1.5mm.
SKU Number: RRCMOS1.5
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Spare Parts for Micro Outrunner Brushless Motors.
Replacement drive shaft Bearing for 1.5mm drive shafts.
You will need Two for each motor.
Priced per each
SKU Number: RRCMOB1.5
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 "3.5g Micro Outrunner Brushless Motor 3.7 Volt")
 "3.5g Micro Outrunner Brushless Motor 7.4 Volt")
 "Micro Power Flight Set: ESC-5A and Motor 3.5g for 3.7V")
 "Micro Power Flight Set: ESC-5A and Motor 3.5g for 7.4V")
 "5A Micro Brushless ESC")
 "Micro Outrunner Brushless Motor Replacement Shaft 1.5mm")
 "Micro Outrunner Brushless Motor Replacement Bearing for 1.5mm Shafts.")