1984 Mooney M20K 231 for sale

[Vince]

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

[Robert M. Gary]

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.

[Robert M. Gary]

> 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

[Dan Luke]

"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

[Matt Barrow]

"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.

[Ken Reed]

> 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

[Matt Barrow]

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

[Matt Barrow]

"Ken Reed" > wrote in message
nk.net...
>> 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.

[Matt Barrow]

"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 :~)

[AINut]

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

[abripl]

One main advantage of more blades is that you can use more power for
the same prop diameter and construction. Each blade handles a portion
of the total thrust-power. In a two blade there is about 0.5/0.333 - 1
== 50% more stress per blade due to thrust - for same engine power.

[[email protected]]

Asking price is $149k, located at ISP, NY. Offers of course are welcome.

[[email protected]]

I haven't had any issues with cruise speed being lower than I expect.
Then again, I never owned the plane with a 2 bladed prop, but I cruise
as fast as my friend's 231 with a 2 bladed prop at the same MP.

[[email protected]]

I haven't had any issues with cruise speed being lower than I expect.
Then again, I never owned the plane with a 2 bladed prop, but I cruise
as fast as my friend's 231 with a 2 bladed prop at the same MP.

[[email protected]]

Not ashamed at all:

Full information about the aircraft and tons of pictures are available
at http://www.madness.net/n57568/ (make sure to click through to the
additional pictures, there are 50 of them). My asking price is
$149,000, with all ADs complied with and airworthy items fixed (if
any), delivered, if you want, to your location (negotiable) from mine,
which is ISP, in NY.

It has had over $40,000 in avionics put in since I've owned it, and has
had excellent maintenance (overhauled propeller, overhauled oxygen
system, overhauled HSI, overhauled AI, overhauled boost pump,
calibrated autopilot, new landing gear shock disks and many other new
or overhauled items). Last annual was in TX at Don Maxwell Aviation,
one of the best Mooney shops around.

Any questions after viewing the photos and specs should be directed to
me by email please. The aircraft's useful load is 943 lbs. It has long
range tanks, so if you fill the tanks you can fly for nearly 1600nm.

Vince