The site consists of five main sections.

Propeller Designer for propeller design

Version 0.9.4 of Propeller Designer released.

Kremer for Human Powered Aircraft design and information about the Kremer schools competition.

Human Powered Flying. A book by Chris Roper about the history of HPAs.

Library A collection of PDF files about various aspects of HPAs and a collection of DAT files of aerofoils sutable for HPAs

Gallery A gallery of photos and pictures of HPAs