Motor KV and prop/voltage matching — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/motor-kv-matching/ (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/) Basis: Design rules and figures from the cited sources; example geometry by Xem Studio Catalog version: 2026-10-20 Sizes: see table below - 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. 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 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - GetFPV: What is a drone motor? — web — Publisher's page; dimensions are facts — https://www.getfpv.com/motors/what-is-a-drone-motor.html - Oscar Liang: Prop, motor, LiPo and weight table — web — Publisher's page; dimensions are facts — https://oscarliang.com/table-prop-motor-lipo-weight/ - Unmanned Tech Shop: Motor selection guide for FPV drones by class and frame size — web — Publisher's page; dimensions are facts — https://www.unmannedtechshop.co.uk/de/blogs/knowledge-base/motor-selection-guide-fpv-drones-by-class-frame-size - ArduPilot: Archived: Advanced MultiCopter Design — web — Publisher's page; dimensions are facts — https://ardupilot.org/copter/docs/advanced-multicopter-design.html - Unmanned Tech Shop: FPV drone propeller size guide: how to choose props — web — Publisher's page; dimensions are facts — https://www.unmannedtechshop.co.uk/de/blogs/knowledge-base/fpv-drone-propeller-size-guide-how-to-choose Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/motor-kv-matching/index.json API: https://xemstudio.com/api/geometry?object=motor-kv-matching