I stumbled across yr query totally by accident, looking for a photo of the GunBus as currenyly in the RAF Museum.
I was the project leader on that aeroplane, 40+ years ago.
The info on the RAF Museum site isn't correct about drawings sources/whereabouts. We started with just 13 General Arrangement drawings which the Vickers historian (Charlie Andrews) had rescued from the tip some years earlier and kept for his own researches - which were actually of the FB9 model but gave us a fair start - along with some photos of crashed/shot down a/c which we got from the Imperial War Museum and a former RFC pilot who'd flown and been shot down in a GunBus.
I'd guess that, in total, there were rather a lot more than 600 new drawings needed for the replica. I gave some of them to Brooklands Museum several years ago and have got a further boxful here (in the Cotswolds in England).
For a couple of years I've been meaning to get down to Brooklands, to get the whole lot catalogued and see whether there is a complete set.
Our aircraft was probably 95+% authentic, with Monosoupape rotary. There are numerous articles around from the 60s reporting on the project.
But if you are seriously looking to build then this material can be available (tho' I'd have to go outside to make copies of the large drawings, beyond my home copier size capacity!).
Feel free to contact me.
Post of the Week: 12/11/09
The discovery of drawings for the GunBus is being described in our hallways here in Oshkosh as "historic", but it's your willingness to share them with a prospective builder that exmplifies what this community is all about. Welcome to Oshkosh365, Geoff, and thank you for your contribution!
EAA Online Community Manager