Library › Aircraft design › Propellers ·

Propeller naming suffixes (E, SF, MR, P, W, N, C)

What do the letters on APC propellers mean? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: apc prop suffix, apc sf meaning, apc e prop meaning, pusher prop p, apc mr prop, propeller naming, apc prop codes, slow flyer prop, wide chord prop w

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

sizes
5 in table

Notes

  • APC stamps diameter x pitch on the blade, followed by letters: E thin electric, F folding, MR multirotor, SF slow flyer, R reversible (all electric-only); W wide chord, N narrow, NN very narrow, P pusher/reverse rotation, C carbon (40% carbon / 60% nylon) (APC Nomenclature).
  • No letters means a standard right-hand Sport prop for IC engines that can also be used on electric motors (APC).
  • 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.

Propeller naming suffixes size chart

parametervalue or rangesource
E / F / MR / SF / Rthin electric / folding / multirotor / slow flyer / reversibleAPC Nomenclature
W / N / NNwide / narrow / very narrow chordAPC Nomenclature
Ppusher (reverse rotation)APC Nomenclature
C40% carbon / 60% nylon by weightAPC Nomenclature
No suffixstandard right-hand Sport propAPC Nomenclature

Where the files are

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

APC PropellersAPC Propeller NomenclaturewebPublisher's page; dimensions are facts
Model Aviation (AMA), J. Smith with APC PropellersCommon Questions with APC Propellers (Mar 2021)webPublisher'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

apc-propeller-naming-propeller10×4.7 in propeller, 2 blades: each section set at the geometric pitch angle atan(P / 2πr); chord and section illustrativeSTEP · STL
Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.
Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=apc-propeller-naming

Propeller naming suffixes (E, SF, MR, P, W, N, C), isometric render of a generated part
Render of apc-propeller-naming-propeller from the free STEP; not to scale.

Fits with

Questions

Is an E prop OK on a glow engine?

No; electric props should only be used with electric motors (Model Aviation, APC Q&A).