Hi Useful
Hawkwinds back catalogue is very confusing. They have released over 120 albums over the years. Many of those recorded after about 1978 were a mixture of studio and live. I cant tell you all the studio albums, but the ones I can reccomend which are purely studio are:
Warrior on the edge of time (Very good)
Quark Strangeness and charm (Good)
Astounding sounds, Amazing music (Excellent)
PXR5 (Very Good and mostly studio)
Levitation (Excellent - their best I reckon)
Chroncle of the Black sword (Excellent concept album based on MIke Moorcocks Elric books - Not popular but I think its great )
I think the very early albums are also studio recordings, Like Doremi Fasol Latido, perhaps someone else can verify this, and add to my list???
The Hawks were often erratic and choosing albums can be tricky, especially as many of their best ones (listed above) are deleted, although can be bought on auction sites. The official Hwkwind website is no help at all. They have apparently disowned their past, which is a shame.
I can also reccomend, although not studio albums - Live Chronicles, Live '79 and Hall of the Mountain Grill (mostly studio..)
Hope this helps - Good luck!