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Motor KV and prop/voltage matching

Name: Motor KV and prop/voltage matching dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

What KV motor for 4S or 6S on a 5 inch drone? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: motor kv, kv rating, kv for 6s, kv vs voltage, best kv 5 inch, what kv motor, kv explained, low kv high kv, kv rpm per volt

Exact dimensions. True size, with no printing tolerance added.

sizes: 7 in table

Notes

KV is rpm per volt unloaded; 2300 KV on 16.8 V gives 38,640 rpm (GetFPV). Higher voltage needs lower KV and bigger props need lower KV (Unmanned Tech Shop).
Oscar Liang's table: 5 in freestyle 2300-2700 KV on 4S, 1700-2100 KV on 6S; 7 in 1200-1400 KV on 6S. Low-KV motors on fewer cells with big props are most efficient (ArduPilot).
The file is a reference example built by Xem Studio from the numbers above (5x4.3 tri-blade named in Unmanned Tech Shop guide.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

Motor KV and prop/voltage matching size chart

parameter	value or range	source
5 in freestyle 4S	2300-2700 KV	Oscar Liang table
5 in freestyle 6S	1700-2100 KV	Oscar Liang table
5 in racing 6S	1900-2300 KV	Oscar Liang table
7 in 6S	1200-1400 KV	Oscar Liang table
3 in 4S	3000-4200 KV	Oscar Liang table
Battery rule	about half dry weight	Oscar Liang
Hover throttle target	~50%	ArduPilot

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

GetFPV	What is a drone motor?	web	Publisher's page; dimensions are facts
Oscar Liang	Prop, motor, LiPo and weight table	web	Publisher's page; dimensions are facts
Unmanned Tech Shop	Motor selection guide for FPV drones by class and frame size	web	Publisher's page; dimensions are facts
ArduPilot	Archived: Advanced MultiCopter Design	web	Publisher's page; dimensions are facts
Unmanned Tech Shop	FPV drone propeller size guide: how to choose props	web	Publisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

motor-kv-matching-propeller

5×4.3 in propeller, 3 blades: each section set at the geometric pitch angle atan(P / 2πr); chord and section illustrative

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Plain text: sheet.txt · JSON: /api/geometry?object=motor-kv-matching