Propeller diameter vs pitch — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/propeller-diameter-vs-pitch/  (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
- An RC prop size like 10x6 gives diameter first, then pitch in inches per revolution (APC nomenclature). Pitch is the distance the prop would advance in one turn with no slip (FAA Powerplant Handbook, geometric pitch).
- APC compares pitch to gearing: more pitch gives higher top speed but weaker takeoff and climb; less pitch gives better acceleration and low-speed thrust (Model Aviation, APC Q&A).
- For engine/motor load, APC's rule of thumb is that +1 in diameter is roughly equivalent to -1 in pitch, so a 12x6 loads about like an 11x7 (Model Aviation, APC Q&A).
- The file is a reference example built by Xem Studio from the numbers above. Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

parameter  value or range  source
Size format  diameter x pitch (in); pitch in in/rev  APC Nomenclature
Geometric pitch  advance per revolution with no slip  FAA Powerplant Handbook
Load equivalence rule  +1 in diameter ~ -1 in pitch (12x6 ~ 11x7)  Model Aviation (APC)
Reference build  12 x 6, 2 blades  APC example

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- APC Propellers: APC Propeller Nomenclature — web — Publisher's page; dimensions are facts — https://www.apcprop.com/wp-content/uploads/2023/05/APC-Propeller-Nomenclature.pdf
- FAA: Aviation Maintenance Technician Handbook - Powerplant, Ch. 7 Propellers — web — Publisher's page; dimensions are facts — https://www.faa.gov/sites/faa.gov/files/09_amtp_ch7.pdf
- Model Aviation (AMA), J. Smith with APC Propellers: Common Questions with APC Propellers (Mar 2021) — web — Publisher's page; dimensions are facts — https://www.modelaviation.com/node/2115

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/propeller-diameter-vs-pitch/index.json
API: https://xemstudio.com/api/geometry?object=propeller-diameter-vs-pitch