Thank you Roger,
I wasn't very good at explaining was I & keeping it short gave you misleading gen.
The WOT I speak of is in the climb out after take-off in the Rans S6-116 that's about 75 mph & which holds the revs down to 5,200; this is in accordance with Rotax guidance that the prop should not be coarser than and rev's less than 5,200 for that duty. It is O.K. also at Straight & Level WOT which still showing its slightly coarse, yielding 5550 rpm. That's the closest I can conveniently adjust to as a working compromise and means for my flying it's safer; like this, unless I dive I won't readily exceed the 5,800 top allowed rpm.
I understand it prevents me accessing the full 80 h.p. but as you point out it is only a fixed pitch prop.
When spring wx does arrive in the U.K. & if she's much the same on fuel use I'll probably do as you say and watch the heat change as it builds up in the CHT and not move more than one slot to No. 2 notch from the top. I've no desire to add the complication (or small extra risk of malfunctions) of thermostats in either oil or water circuits. An EGT is really correct I do agree, but as I haven't got any of that kit, the book does seem to allow consumption as a (rough guide).
Regards & I'm grateful for your continued gudance.
mike hallam.
