ORIGINAL: Pete850
Hgiles,
My humble apologies, you are of course quite correct. The review plane did indeed have a YS91FS NOT an RCV.
Looking at the video clips of the review Spit, especially the take-off, it seems that the .91 had plenty of power.
Please scroll back to Post #8 and view the two videos given at the bottom of that post, which show the Spit being flown with a YS 91FZ. Then check out the engine on Post #11. The YS 91 indeed had plenty of power.