1984 Mooney M20K 231 for sale

Wrong!


Lean of peak horsepower =14.9 x fuel flow

Lean of peak ONLY and it's not % but straight hp

Karl
"Curator" N185KG

"karl gruber" wrote in message
oups.com...
Wrong!


Lean of peak horsepower =14.9 x fuel flow

Lean of peak ONLY and it's not % but straight hp
What Temp LOP?

There's a wide berth.

And what's you calculation?

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

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.

-----Original Message-----
From: abripl ]
Posted At: Friday, February 24, 2006 6:09 PM
Posted To: rec.aviation.owning
Conversation: 1984 Mooney M20K 231 for sale
Subject: 1984 Mooney M20K 231 for sale

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.
[Jim Carter]
Isn't one feature of the 3 blade prop a smaller diameter that provides
better ground clearance?

And are you really using more power? Isn't number of blades related to
torque applied to the crankshaft? The engine doesn't change power output
based on the number of blades its swinging does it?

I know that smaller diameters tend to mean lower tip velocity and less
noise for the same amount of torque, but I've never heard more blades
means more power used before. But then, I could be wrong...it wouldn't
be the first time and it probably won't be the last.

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