Unloaded – including his second Napier Sabre (green) which appears to be a Mk VII vs the Mk V the black one could be (single sided entry centrifugal compressor, but no water/methanol injection). Just my observations, willing to be proved wrong 🙂 Both “modern” end of war builds ’44+ with better design features. Hmmm, corrections, Kermit has said the black engine is a IIA – an earlier engine, but that the green engine is a MkV – I stand corrected!! 🙂