# AG35 airfoil (Drela AG series)

> What are the AG35-AG38 airfoils?

- Category: Airfoils › Airfoils
- Kind: Standard part
- Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
- Page: https://xemstudio.com/objects/ag35-airfoil/ · JSON: https://xemstudio.com/api/geometry?object=ag35-airfoil · Plain text: https://xemstudio.com/objects/ag35-airfoil/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

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

## Notes

- 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).

## Sizes

| 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 |

## Where the files are

- Charles River Radio Controllers (M. Drela designs): [Bubble Dancer 3m RES sailplane](https://charlesriverrc.org/articles/on-line-plans/mark-drela-designs/bubble-dancer/) — web — Publisher's page; dimensions are facts

## Questions

**Where do AG35-AG38 go on the wing?**

They are listed together for the Bubble Dancer wing; the page does not give spanwise stations (CRRC).

## Fits with

- [Clark Y airfoil](https://xemstudio.com/objects/clark-y-airfoil/)
- [Selig S1223 airfoil](https://xemstudio.com/objects/selig-s1223-airfoil/)
- [Eppler E387 airfoil](https://xemstudio.com/objects/eppler-e387-airfoil/)
- [MH 32 airfoil](https://xemstudio.com/objects/mh32-airfoil/)