Yep the way I read the first Smith article is that it implied the first design CC with a radial engine had flown in his later book he says it was not built Certainly an interesting type and I think with the museum ref we can be fairly sure the NCC had a V Having a peek down the inlet would seal it assuming the engine is still fitted they often arent but that would be OR   If it was brought to Britain after the war and examined by the RAE there should be a report on it in the archives finding it wont be so easy