Flat-bottom hull — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/flat-bottom-hull/  (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 flat-bottom hull is very stable, has low draft, planes easily with little power and is cheap to build, but gives the bumpiest, wettest ride in waves (BoatTest).
- The bow may still have steep deadrise; transoms below 17 deg are described as flatter at the stern (BoatTest).
- Used on: Jon boats, Skiffs.
- The file is a reference example built by Xem Studio from the numbers above (Reference RC mono: 585 mm length and 20 deg transom deadrise (SV Design Stealthwake data); 181 mm is an unlabelled width in the same source's deadrise diagram.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

parameter  value or range  source
Transom deadrise  near 0 deg (below 17 deg = 'flatter')  BoatTest

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- BoatTest: To Deep-V or Not to Deep-V — web — Publisher's page; dimensions are facts — https://boattest.com/view-news/6472_To-Deep-V-or-Not-to-Deep-V

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