Other great hawkwind related rleases are New World's Fair by Michael Moorcock and the Deep Fix and Captain Lockheed and the Starfighters by Robert Calvert....
I am a huge fan of the Calvert era of Hawkwind, and like his solo material as well. "Lucky Leif and the Longships" has some great songs on it, very valiant and wonderfully written viking themed rock, but with the genius twists Calvert gives to everything he does. That Beach Boys style song about pillaging and destruction is hilarious. Since Hawkwind was virtually the backing band for these early solo outings, I consider them to be part of the Hawkwind canon.
Speaking of "Deep Fix", I wanted to get into it, but couldn't quite enjoy the latter part of the album. After the first couple songs, it seemed to go down hill. Will most likely end up listening to it again though.
Something very cool that I hope some hardcore Hawkfan out there can verify: I was searching for info on Del Dettmar, and found this link http://mutant-sounds.blogspot.com/2007/04/del-dettmar-with-gerald-toon.html
to a download of an album apparently from 1980, called "Synthesis", a collaboration with a musician named Gerald Toon, who I know nothing about. This album is quite good, especially if you are into tripped out, old school sci-fi drenched synth action. It has that exquisite retro-futuristic feel of the synth work from Hawkwind, and there are some true gems on the album. I was doubting it was really Del himself when I was downloading, but after listening I feel that it's definitely him. Those beautiful, spacey, somehow humorous, but deep and weird sounds are unmistakeable. Makes me wish he had made more solo music. Any info on this one would be most welcome.