New in box. Astro Micro 020 motor 5 turns with 3.3:1 Gearbox. Motor only.

Specifications: 

• Motor P/N 803GM-5T 
• Stator Winding 5 Turns, #20 
• Motor kv 2567 rpm/volt 
• Winding Resistance 0.075 ohms 
• Gear Ratio 3.3 to 1 Kv with Gear Box 778 rpm/volt 
• No Load Current 1 amp 
• Maximum Current 25 amps 
• Maximum Power 300 watts 
• Maximum Motor Rpm 40,000 rpm 
• Maximum Prop Rpm 10,000 rpm 
• Motor Weight 2.5 ounces 
• Gear Box Weight 1.2 ounces 
• Motor Length 1.75 inches 
• Gear Box Length 1.00 inches 
• Motor Diameter .98 inch (25mm)
  
  

Specifications:

Weight	Can Size D x L	Amps	Rated Max Watts	Shaft	Max Motor RPM	KV	Resistance	No Load Current
104.9g/3.7oz.	.98"(24.8mm) x 3.1"(78.6mm) to drive plate	18-25A, 30/30s	Not Pub.	Motor 1/8" Gearbox 1/4"(6.35mm)	40k	2567	7.5mOhm	1A

Setup and Performance Chart

# Cells	Prop	Amps	Watts Input	Lost Watts (Heat)	% Motor Efficiency	RPM	Static Thrust Ounces	Pitch Speed MPH
2	14x10	23.9	179	48	70%	3,880	30	37
3	11x7	20.6	232	41	81%	6,950	37	46
3	11x10	25.6	288	58	78%	6,510	37	62
3	12x8	27.5	309	65	77%	6,340	44	48
4	10x6	22.7	341	51	84%	9,550	47	54
4	10x8	27.4	411	68	82%	9,110	49	69
4	11x5.5	27.7	413	68	82%	9,010	56	47
5	9x4.5	19.7	369	45	87%	12,630	49	54

Estimates based on manufacturers provided constants using E-Calc. 1300 used as trial cell in calculations. Actual performance may vary depending on components used, accuracy of data as provided by manufacturer, quality of ESC, weather and many other variables.

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