X-Mozilla-Keys:                                                                                 
Perry Mick wrote:

Paul wrote:

Right now too much pitch sounds like the major problem.
You need to get that engine going 6000 RPM or more in stright
and level.
What top speed and RPM are you seeing Perry?

That's been my goal, but it's been rather elusive.  With this
latest prop I didn't change the pitch, just the chord and blade
thickness.

I stayed in the pattern this morning, with the new prop.  Since
the climb rate wasn't improved, and I was late for work, I just
came back down.  Prop 2 (the previous prop) was 4650 rpm cruise,
4500 rpm climb, 80 knots climb, 110 knots cruise.

I expect this new prop is about 4700 climb, cruise unknown,
maybe 4900.  Pitch is about 40 inches.

I think the airflow through the fan at 147 knots is about all
the prop and engine HP can handle.  The duct is acting like a
transmission, gearing me down to 110 knots.  Thus my next idea is
just to change the transmission ratio (duct) so it's closer to 1:1
instead of 4:3.  Just an analogy, perhaps inacurate.

 
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