Eppler E387 airfoil — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/eppler-e387-airfoil/  (sheet CC BY 4.0)
Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
Catalog version: 2026-10-20

Sizes: see table below
- The Eppler 387 was tested by NASA Langley in the Low-Turbulence Pressure Tunnel at chord Reynolds numbers from 60,000 to 460,000 (NASA TM-4062), making it a standard benchmark for low-Re (model-aircraft) airfoil behaviour.
- The NASA tests used oil-flow visualisation to locate laminar separation and turbulent reattachment, the laminar bubble that dominates model-scale airfoil drag (NASA TM-4062).

parameter  value or range  source
NASA test Re range  60,000-460,000  NASA TM-4062
NASA test Mach range  0.03-0.13  NASA TM-4062
Coordinates source  NASA TM-4062  NASA TM-4062

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- NASA Langley (McGhee, Walker & Millard): Experimental Results for the Eppler 387 Airfoil at Low Reynolds Numbers in the LTPT, NASA TM-4062 (1988) — web — Publisher's page; dimensions are facts — https://ntrs.nasa.gov/citations/19890001471

No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.
API: https://xemstudio.com/api/geometry?object=eppler-e387-airfoil