"Forget"- thanks for that- it certainly could be the location.
The shape of the fort looks different though and there are no indications that the v-shaped structure on the end was ever there.
The access road and the small escarpement to the south don't seem to be there either.
Nevertheless, it is entirely possible that the whole structure could have disappeared, been altered or demolished since the 1930's.
Phileas Fogg- I have also read that the fort was 16km south of Rutbah.
Taking a measure at this range on Google-earth shows nothing there as far as I can see.
Thanks to you all-
the mystery continues....