Flying wing / tailless aircraft — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/flying-wing-tailless/  (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
- A tailless aircraft provides pitch stability from the wing itself: on a swept wing, washout on the outer panel lets the tips act like a tail, matching tip and root angle of attack at the design condition (R/C Soaring Digest).
- NASA's Prandtl-D wings use Prandtl's 1933 bell-shaped lift distribution, which for a wing of constrained mass gives 11% less induced drag with 22% more span than the elliptical optimum, plus tip upwash and proverse yaw that let it fly without a fin (NASA Armstrong).
- Ground-effect reviews note flying-wing WIG craft have a small stable height-pitch range (Rozhdestvensky). Elevons replace elevators and ailerons (Heritage Concorde).
- Used on: NASA Prandtl-D, Concorde (tailless delta).
- 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
Bell vs elliptical (constrained mass)  11% less induced drag, 22% more span  NASA Armstrong (Newton)
Prandtl-1/-2 span; Prandtl-3 span  12.3 ft; 25 ft  NASA Armstrong
Washout range on wings generally  0-10 deg nose-down  ERAU (Leishman)
Reference build  span 1000, root 250, tip 120, LE sweep 25 deg, washout via twist  illustrative

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- R/C Soaring Digest: Twist Distributions for Swept Wings, Part 2 (June 2002) — web — Publisher's page; dimensions are facts — https://new.rcsoaringdigest.com/2002/06/twist-distributions-for-swept-wings/[pdf].pdf
- NASA Armstrong / UC Berkeley (L. Newton): Stability and Control Derivative Estimation for the Bell-Shaped Lift Distribution — web — Publisher's page; dimensions are facts — https://ntrs.nasa.gov/api/citations/20180002374/downloads/20180002374.pdf
- Embry-Riddle (Leishman), Introduction to Aerospace Flight Vehicles: Wing Shapes and Nomenclature — web — Publisher's page; dimensions are facts — https://eaglepubs.erau.edu/introductiontoaerospaceflightvehicles/chapter/wing-shapes-and-nomenclature/
- Progress in Aerospace Sciences (K.V. Rozhdestvensky, 2006): Wing-in-ground effect vehicles (review) — web — Publisher's page; dimensions are facts — https://www.hassanhameed.com/wp-content/uploads/2016/01/wingingroundeffectvehicles-130120003005-phpapp01.pdf
- Heritage Concorde: The Wing — web — Publisher's page; dimensions are facts — https://www.heritageconcorde.com/the-wing

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