1984 Mooney M20K 231 for sale

I have a 1984 Mooney M20K 231 for sale. 2483 TTSN, 1415 SFRM. Dual Garmin
430s.

Please see http://www.madness.net/n57568 for specifications and tons of
pictures, and email me directly with any questions. Thanks for looking!

Vince

Vince,
How did you find the 3 bladed prop to perform. Many in the Mooney
community seem to believe the 3 blade prop reduces cruise speed by
about 5 knots.

Supposedly a myth.

Maybe. However, before I became a Mooney owner my bird was an Arrow
with a 3 blade prop. In that configuration, it absolutely did slow it
down quite a bit. I know that Top Gun Aviation (a Mooney Service
Center) just purchased one of the "new designed" 3 blades for their
shop Mooney. They want to determine what the cost in speed may be. The
manufactor claims that the new designs aren't slower, but we'll see.

-Robert

"Matt Barrow" wrote:


How did you find the 3 bladed prop to perform. Many in the Mooney
community seem to believe the 3 blade prop reduces cruise speed by
about 5 knots.

Supposedly a myth.
Members of Cardinal Flyers have reported cruise speed losses after conversion
to 3-blades. Some have reported ROC improvements and less noise. The
consensus runs against the conversion being worth it.

--
Dan
C-172RG at BFM

"Dan Luke" wrote in message
...

"Matt Barrow" wrote:


How did you find the 3 bladed prop to perform. Many in the Mooney
community seem to believe the 3 blade prop reduces cruise speed by
about 5 knots.

Supposedly a myth.
Members of Cardinal Flyers have reported cruise speed losses after
conversion to 3-blades. Some have reported ROC improvements and less
noise. The consensus runs against the conversion being worth it.

Not only (far) less noise, but significantly decreased vibration due to
different airflow pulses
against the airframe.

It is also suggested that the miniscule speed loss (1-2%) can be adjusted
out by running higher RPM's that a two blade prop would turn into noise and
vibration.

How did you find the 3 bladed prop to perform. Many in the Mooney
community seem to believe the 3 blade prop reduces cruise speed by
about 5 knots.

I believe that's only for the four cylinder models. The six cylinder
ones (as is Vince's 231) do not suffer any loss of cruise speed.
---
Ken Reed
N9124X

"Doug" wrote in message
oups.com...
You genearlly need 300 horse to see an improvement in performance with
a 3 blade prop.

Really?

"Ken Reed" wrote in message
news
How did you find the 3 bladed prop to perform. Many in the Mooney
community seem to believe the 3 blade prop reduces cruise speed by
about 5 knots.

I believe that's only for the four cylinder models. The six cylinder ones
(as is Vince's 231) do not suffer any loss of cruise speed.

AIUI, the earlier three blade props were not optimal for higher
HP/displacement engines...not like he current stable.

Also, you could run higher RPMs with a three blade that, with a two blade
prop, would could unsuitable noise and vibration.

"Dan Luke" wrote in message
...

"Matt Barrow" wrote:


How did you find the 3 bladed prop to perform. Many in the Mooney
community seem to believe the 3 blade prop reduces cruise speed by
about 5 knots.

Supposedly a myth.
Members of Cardinal Flyers have reported cruise speed losses after
conversion to 3-blades. Some have reported ROC improvements and less
noise. The consensus runs against the conversion being worth it.

Since "consensus" is a political term, rather than a scientific term, I'd be
more impressed by real test data rather than subjective opinions :~)

If you're too ashamed to post asking price and location, don't even
bother posting.



Vince wrote:

I have a 1984 Mooney M20K 231 for sale. 2483 TTSN, 1415 SFRM. Dual Garmin
430s.

Please see http://www.madness.net/n57568 for specifications and tons of
pictures, and email me directly with any questions. Thanks for looking!

Vince