Orthogonoid/Snippet

The Orthogonoid is a self-constructing spaceship analogous to the Demonoids, with a slow orthogonal direction of travel. The first example was completed by Dave Greene on 29 June 2017, with a top speed of 16c/217251. The design is HashLife-friendly, meaning that the spaceship's speed and displacement can be trivially adjusted to be exact powers of two. A script is available that can build an Orthogonoid with any sufficiently large period 3476016+8N.