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dawnflyer44(at)hotmail.co
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 Posted: Sun Aug 06, 2006 11:28 pm Post subject: Allegro-List Digest: 4 Msgs - 08/06/06 |
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Thom,
Is your allegro hangered? Or is it left out to receive the beneficial rays
of ol' Sol? The sun will bleach every other color, but white he will turn
to yellow.
Mick in Valdese
| Quote: | From: Allegro-List Digest Server <allegro-list(at)matronics.com>
Reply-To: allegro-list(at)matronics.com
To: Allegro-List Digest List <allegro-list-digest(at)matronics.com>
Subject: Allegro-List Digest: 4 Msgs - 08/06/06
Date: Sun, 6 Aug 2006 23:55:08 -0700
*
==================================================
Online Versions of Today's List Digest Archive
==================================================
Today's complete Allegro-List Digest can also be found in either of the
two Web Links listed below. The .html file includes the Digest formatted
in HTML for viewing with a web browser and features Hyperlinked Indexes
and Message Navigation. The .txt file includes the plain ASCII version
of the Allegro-List Digest and can be viewed with a generic text editor
such as Notepad or with a web browser.
HTML Version:
http://www.matronics.com/digest/allegro-list/Digest.Allegro-List.2006-08-06.html
Text Version:
http://www.matronics.com/digest/allegro-list/Digest.Allegro-List.2006-08-06.txt
================================================
EMail Version of Today's List Digest Archive
================================================
----------------------------------------------------------
Allegro-List Digest Archive
---
Total Messages Posted Sun 08/06/06: 4
----------------------------------------------------------
Today's Message Index:
----------------------
1. 04:56 AM - Re: Cabin Throttle Lever/ Bowen Cable Connection (Thom
Riddle)
2. 05:02 AM - fuselage "white" color - darkening? (Thom Riddle)
3. 09:38 AM - Strange behavior (Thom Riddle)
4. 04:48 PM - New Incoming Message Size Limit Implemented... (Matt
Dralle)
________________________________ Message 1
_____________________________________
Time: 04:56:28 AM PST US
From: "Thom Riddle" <jtriddle(at)adelphia.net>
Subject: Re: Cabin Throttle Lever/ Bowen Cable Connection
Hugh,
Here are a couple photos I took of what Dave described.
--------
Thom in Buffalo
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=52716#52716
Attachments:
http://forums.matronics.com//files/allegro_throttle_side_182.jpg
http://forums.matronics.com//files/allegro_throttle_top_244.jpg
________________________________ Message 2
_____________________________________
Time: 05:02:59 AM PST US
From: "Thom Riddle" <jtriddle(at)adelphia.net>
Subject: fuselage "white" color - darkening?
Attached is a photo taken yesterday of the aft fuselage with a white
plastic garbage
bag next to it for color comparison. It appears that the "white" of the
fuselage is darkening a bit over time.
Anyone else see this happening?
--------
Thom in Buffalo
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=52717#52717
Attachments:
http://forums.matronics.com//files/dsc00150_210.jpg
________________________________ Message 3
_____________________________________
Time: 09:38:51 AM PST US
From: "Thom Riddle" <jtriddle(at)adelphia.net>
Subject: Strange behavior
During my BFR yesterday, the CFI put the Allegro into trimmed steady state
flight
at about 80 mph IAS. Then he banked to the left about 45 degrees and
neutralized
the ailerons and said "We are simulating a locked joystick condition, i.e.,
no elevator or aileron controls, only rudder and throttle. Get us safely
out
of this unusual attitude." I left the throttle alone and eased in right
rudder
and the Allegro resumed straight and level flight without too much adverse
yaw or other anomalies.
Then the CFI did the same thing with a right bank. Now comes the
interesting Allegro
response. I eased in left rudder and it pitched slightly up with the yaw
and then abruptly went very sharply nose down, not just a little bit but
in
steep dive angle. I caught it with the elevator and we both looked at each
other
with the obvious question marks on our faces that said "WTF__K was that?"
We
did it again from the right bank of about 45 degrees and this time I added
the
rudder more slowly still but at some point of yaw, the same abrupt and
severe
nose drop occurred which I caught again with the elevator. We tried it
again
from a left bank, and as before, nothing unseemly happened.
What follows is my analysis of what was happening. I am no aerodynamicist
so this
is just my best guess. In any case, whatever the cause, all Allegro pilots
should be aware of this.
Rudder only, by its very nature, is an uncoordinated maneuver. When in a
steep
right bank and left rudder is added, the airplane begins to slip (high
rudder,
no aileron). Remember that we were flying fairly slowly around 80 mph IAS
and
the nose was pitched up and was also yawed left, thus allowing the higher
(left)
wing and fuselage to block flow to the horizontal stabilizer. Insufficient
airflow over the elevator allowed the elevator to fall and the nose to
pitch
down. Note that it takes about 25-30 mph of airflow during straight flight
or
take-off run rather, to neutralize the weight of the elevator.
So why did it not do this on the opposite side? The only explanation I can
think
of is the prop creates a rotating airflow (clockwise from pilot's view)
along
and surrounding the fuselage. The airflow was blocked because of this
rotational
direction. On the other side (left bank recovery) the yaw direction was to
the right and the rotating airflow was not blocked thus allowing
maintenance
of sufficient airflow over the horizontal stabilizer and elevator
precluding
the sudden nose down pitch response.
I'm considering trying a very light bungee on the joystick to hold it in
neutral
with zero airflow. This will change the trim settings a bit, but not in
such
a way that it is not predictable. Then I will repeat the maneuver at
altitude
and see what happens. Another way to test this theory without the bungee is
to
do it at higher airspeeds so the nose is not so pitched up and the airflow
over
the tail may not be diminished enough to cause the sudden loss of elevator
power.
Fly safe!
--------
Thom in Buffalo
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=52774#52774
________________________________ Message 4
_____________________________________
Time: 04:48:56 PM PST US
From: Matt Dralle <dralle(at)matronics.com>
Subject: New Incoming Message Size Limit Implemented...
Dear Listers,
Due to a number of requests to limit the size of incoming posts to the
Lists because
of the recently added enclosure feature, I have add a new filter that will
limit the total size of any given message posted to the List. I have
initially
set the limit to 2MB
and we'll see how everyone likes that.
If a member attempts to post a message that is greater than the set limit,
they
will receive an email back indicating that their message wasn't posted to
the
List and why. Also included in the message will be the current size limit
and
how large their message
was.
Some might say that 2MB is still too large, but its a place to start...
Best regards,
Matt Dralle
Matronics Email List Administrator
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Tue Aug 08, 2006 1:10 am Post subject: Allegro-List Digest: 4 Msgs - 08/06/06 |
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Mick,
It has always been hangared.
Thom in Buffalo
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http://www.matronics.com/Navigator?Allegro-List |
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_________________
Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
- Anonymous |
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