Further to my earlier performance posting I have today received from M+D a copy of the approved certification version of the engine manual. It is only in German which I can't read but I can make out a couple of significant differences to the earlier draft versions from JS.

1) 2% oil mix instead of 4%

2) Max rpm 97000 rpm but only for 5 minutes. Fuel use 77L/hr. (Fuel consumption and thrust seem to be exponentially related to the rpm.)

3) Max continuous rpm 80000 (= 58% thrust).

The introduction of the maximum time for full thrust is going to reduce the potential range because previous predictions for the JS1 were that the best range would be a single max power continuous climb then glide. I am not sure what the best climb rate or speed for best climb at 80,000rpm are so I can't make a good estimate of the resulting range but I seem to maintain level flight at around 70knots at 67,000 so it must be climbing at 80,000 rpm.