Originally Posted by
Haraka
I remember seeing the Napier HTP liquid rocket system on a Saro Skeeter's rotor tips flying out of Luton in the mid 50's. It demonstrated a spectacular vertical climb rate (with associated firework-like noise and vapour streams! ).
As the Skeeter was so underpowered it struggled to lift even its pilot on a warm day, it probably needed all the help it could get.