Agreed, 3D printing is expensive, but the cost is coming down. Let’s for example imagine someone is restoring to flying condition a Defiant or Whitley or whatever. The restorer needs to replace several fuselage frames. These would normally be handmade. This is an expensive process. Maybe a single fuselage frame might cost £10,000. Using 3D print technology might reduce the costs, and therefore make the project more doable? Or do we still live in an age were money is no option?

As posted on the Drawings thread Avery now trade as Avery Weigh-Tronix™ and they do have a museum that might be able to assist:
http://www.averyweigh-tronix.com/About-Us/Avery-Historical-Museum/

I’ve checked with this museum, and sadly they don’t have any drawings related to the Satyr. Likewise, I’ve checked with other collections, museums and archives. It might be that any surviving drawings or plans have been incorrectly catalogued, but I don’t have the means to verify who has what!

Sadly, after years of searching, I’ve had to concur with other enthusiasts; the original plans were either lost or destroyed decades ago. All I’ve had to work with are photographs and a set of 1/4 scale RC plans, which do little to convey the internal structure.

The original idea was to built a flying replica, but…

I’m not sure? Even if the design was assessed as being airworthy, I’m not keen on building something that someone else will rely on to keep him or her alive at 10,000ft! And then there is the cost; my design relies heavily on plywood. To build a static replica would require cheap-as-chips B&Q £10/£40 sheets (2mm to 24mm), whereas an airworthy structure would require aviation-grade wood costing ten times that amount!

May I suggest that you consider the Australian Rotec radial? Their Web address is RotecEngines.com and Email is [email]RotecAdmin@bigpond.com[/email]

Sadly the Rotec is too heavy.