'Plane speaking

Sir,

Please tell me how a Cierva Autogiro turned into a Fox Moth on page 156 of the February issue?

Did it go through a pupation?

Chris Higgins, Crawley, West Sussex.

We do know that wings and autogiros are not bedfellows (see also Boddy Language, page 260). These things happen. The technical term is 'production glitch' — Ed.