The Heinlein was a Federation Type 15 shuttlepod that was in service with Starfleet in the mid-24th century, attached to the USS Enterprise-D. It was shuttlepod number 08.

Early in 2366, the Heinlein was listed on the shuttlebay operations display as being tested in Hangar 2. (TNG: "Evolution", okudagram)

This shuttlepod was only mentioned in writing.
A photograph of a Type 7 shuttlecraft labeled Heinlein appeared in a magazine published by Starlog for The Next Generation.