Wed, Jul 25, 2007
Better Performance For Mooney M20A-G, M20J Operators
Hartzell Propeller announced at AirVenture 2007 this week it has
received an STC to install a newly designed, two- bladed 74"
diameter blended airfoil Top Prop performance conversion kit onto
Mooney M20A-G and M20J models.
Hartzell tells ANN it optimized the new blended airfoil design
to deliver greater cruise performance at higher airspeeds. Flight
tests with an M20F have confirmed an increase of 2-4 knots in
normal cruise over the original Hartzell two-bladed propeller while
maintaining equivalent climb performance. The improvement in cruise
was achieved at the expense of a slightly longer take-off roll that
has been observed at about an extra 3%.
"Tests also confirmed that performance levels increased along
with power settings and airspeed levels. So the higher the airspeed
and the higher the power settings the greater the performance
improvement that we observed in cruise levels," said Mike Trudeau,
Director of Hartzell's Top Prop Performance Conversion program.
Restrictive placards on the A-D, G and J aircraft have been
removed entirely while the restriction on the E and F models has
been reduced to simply no continuous operation above 24” of
manifold between 2350 and 2550 RPM.
On all models of the aicraft, the repetitive inspections
required by AD2006-18-15 have been eliminated.
The new Mooney Top Prop kit comes with the propeller, a
highly-polished spinner, STC paperwork and a three-year/1000-hour
warranty, at a list price of $6,995.
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