AG35 airfoil (Drela AG series) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/ag35-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
- AG35-AG38 are Mark Drela's thin airfoils used across the wing of the Bubble Dancer 3 m RES sailplane, with ht21 for the tail surfaces (CRRC).
- The design combined the Allegro layout with 'some new thin airfoils' for easy building as a thermal glider that can still handle wind and winch launches; the model weighs about 31 oz with a sink rate of about 0.8 ft/s (CRRC).
- Used on: Bubble Dancer (RC sailplane), Allegro-Lite (prototype wing).

parameter  value or range  source
Bubble Dancer wing airfoils  ag35, ag36, ag37, ag38  CRRC
Tail airfoil  ht21  CRRC
Span / area  120 in / 1000 in^2  CRRC
Weight / sink  ~31 oz (880 g) / ~0.8 ft/s  CRRC
Coordinates source  Drela airfoil files on CRRC Bubble Dancer page  CRRC

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Charles River Radio Controllers (M. Drela designs): Bubble Dancer 3m RES sailplane — web — Publisher's page; dimensions are facts — https://charlesriverrc.org/articles/on-line-plans/mark-drela-designs/bubble-dancer/

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=ag35-airfoil