Indeed so, and an amazing feat of development. People that fly them though do report the Griffon powered device is a somewhat more clumsy and bruteish aircraft compared to the early Merlin marks that are so balanced and poised.

I will never know, its 1000GBP for a half-hour in Caroline Grace's twin seat Spitfire. That's a bit over 2.5 Stalwart tank-fulls or three years playing. . . . . . . . . . . . . .

Whilst we have an organised Spitfire beat-up along the Falaise road for this 60th D-Day year, wouldn't it be nice if Kermit Weeks and Ricardo's get his Tempest V finished so we can enjoy 24 pots of Napier's sleeve-valve finest at 3750 a minute.

Here's another lump of novel engineering that out performed RR litre for litre by a big margin and the truly huge Wasp Major by 100% having the same grunt for 36 litres that some needed 72 litres for.

See:
http://www.ptfnasty.com/ptfDelticHist1.htm
http://user.tninet.se/~ytm843e/lebrocq.htm

For some interesting insights into Napier stuff.

R.