Compounded twin spool turbprop?

[Spoiler Mixer]

A friend was recently apparently asked about a Compounded twin spool turboprop during a CAA Oral.

Can anyone provide any more basic info on this engine please?.....A look through several books has produced zilch!!

Thanks in advance

[Travelling Toolbox]

Maybe they are thinking of that god awful contraption they shoehorned into the Gannet years ago. A double mamba I think they called it. Some ex naval carrier types could probaly tell you more about it - or the trusy Janes.

Cheers

[singleacting]

They are talking about the RR TYNE check out the jet engine book

[singleacting]

Its called a compound engine because the LP compressor is coupled to the reduction gear, while the HP compressor is free.

[Spoiler Mixer]

Many thanks singleacting...That explains it!