Neat experience today.

In article ,
Matt Whiting wrote:

stiction

The what???

john smith wrote:

In article ,
Matt Whiting wrote:


stiction


The what???

Commonly used term for static friction. Static friction is generally
higher than dynamic friction. It is what makes moving mechanisms take
more force to get moving than to keep moving. Makes for jerky controls
and makes very find control adjustments difficults. Cessnas rarely have
this problem, but the Pipers I've flown with those fat control columns
seem very prone to stiction. It makes it hard to do a smooth flare for
instance. You apply back pressure ... and nothing happens. A little
more pressure ... still nothing. A little more pressure ... and the
controls "break free" and you get a 1/2" of control motion.

Often when flying Pipers I know slowly "pump" the controls during the
flare. One of the aviation columnists recently wrote about using this
technique and the advantages of it. I never needed it much in my 182 as
I could gradually pull back the wheel in it. The Arrow isn't nearly as
smooth and a low amplitude, high frequency "pumping" of the wheel tends
to allow smoother arrivals at closer to stall speed.


Matt

Often when flying Pipers I know slowly "pump" the controls during the
flare. One of the aviation columnists recently wrote about using this
technique and the advantages of it. I never needed it much in my 182 as
I could gradually pull back the wheel in it. The Arrow isn't nearly as
smooth and a low amplitude, high frequency "pumping" of the wheel tends
to allow smoother arrivals at closer to stall speed.

I ususally wiggle the yoke (roll axis) as I pull or push to overcome the
"stiction". :-))

In article ,
Matt Whiting wrote:
snip

Often when flying Pipers I know slowly "pump" the controls during the
flare. One of the aviation columnists recently wrote about using this
technique and the advantages of it. I never needed it much in my 182 as I
could gradually pull back the wheel in it. The Arrow isn't nearly as
smooth and a low amplitude, high frequency "pumping" of the wheel tends to
allow smoother arrivals at closer to stall speed.


Matt

Okay, survey time. We have a lot of Piper pilots on the newsgroups. How
many of you find it necessary to "pump the yoke"to get a smooth low speed
landing? I'll go first... not me. Is something wrong with my airplane or
just every other Piper in the world?

Joe Schneider
N8437R



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JJS wrote:
In article ,
Matt Whiting wrote:

snip

Often when flying Pipers I know slowly "pump" the controls during the
flare. One of the aviation columnists recently wrote about using this
technique and the advantages of it. I never needed it much in my 182 as I
could gradually pull back the wheel in it. The Arrow isn't nearly as
smooth and a low amplitude, high frequency "pumping" of the wheel tends to
allow smoother arrivals at closer to stall speed.


Matt


Okay, survey time. We have a lot of Piper pilots on the newsgroups. How
many of you find it necessary to "pump the yoke"to get a smooth low speed
landing? I'll go first... not me. Is something wrong with my airplane or
just every other Piper in the world?

I've flown four different Pipers, a Tomahawk, where I didn't notice
excessive stiction. It was very light on the controls, much like the
C150s I learned in.

I've flown two different Cherokee 180s. Both had substantial stiction,
but both were hard used FBO aircraft. My instructor sprayed some
silicon on it one time as it was so bad. This helped for a few hours,
but was short-lived.

I currently fly a Piper Arrow. It has excessive stiction. I don't know
how often the column gets lubed. I'll ask our maintenance officer at
our next club meeting.

Matt

In article ,
"JJS" jschneider@re movecebridge.net wrote:

Okay, survey time. We have a lot of Piper pilots on the newsgroups. How
many of you find it necessary to "pump the yoke"to get a smooth low speed
landing? I'll go first... not me.

Not me (cherokee 140).

--
Bob Noel
Looking for a sig the
lawyers will hate

In article ,
"JJS" jschneider@re movecebridge.net wrote:

Okay, survey time. We have a lot of Piper pilots on the newsgroups. How
many of you find it necessary to "pump the yoke"to get a smooth low speed
landing? I'll go first... not me. Is something wrong with my airplane or
just every other Piper in the world?

If properly maintained and lubricated, the shaft should move freely,
without binding.

"john smith" wrote in message
...
In article ,
"JJS" jschneider@re movecebridge.net wrote:

Okay, survey time. We have a lot of Piper pilots on the newsgroups. How
many of you find it necessary to "pump the yoke"to get a smooth low speed
landing? I'll go first... not me. Is something wrong with my airplane
or
just every other Piper in the world?

If properly maintained and lubricated, the shaft should move freely,
without binding.

Bingo. On my old Tomahawk, I had to dip the tip of my index finger into
engine oil and spread it on both yoke shafts about once every six months to
keep everything moving easily. The difference between pre and post-lube
stiction was noticable.

KB

Bingo. On my old Tomahawk, I had to dip the tip of my index finger into
engine oil and spread it on both yoke shafts about once every six months
to keep everything moving easily. The difference between pre and
post-lube stiction was noticable.

I'll bet a little lithium grease would work better, longer, and be less
mess.

Of course, you seldom will have a bit of lithium grease on your dipstick,
when you need it! g
--
Jim in NC

Nope, not me either...

'79 Warrior..... no "stiction"...flare is a two finger exercise.

If my yoke is back, a slight push, it will "coast" all the way to the
panel with the engine stopped..

I would check the lubricant situation on the yoke tube...or something
ia REALLY out of whack....

Dave


On Mon, 29 May 2006 17:11:30 -0500, "JJS" jschneider@re
movecebridge.net wrote:



In article ,
Matt Whiting wrote:
snip

Often when flying Pipers I know slowly "pump" the controls during the
flare. One of the aviation columnists recently wrote about using this
technique and the advantages of it. I never needed it much in my 182 as I
could gradually pull back the wheel in it. The Arrow isn't nearly as
smooth and a low amplitude, high frequency "pumping" of the wheel tends to
allow smoother arrivals at closer to stall speed.


Matt

Okay, survey time. We have a lot of Piper pilots on the newsgroups. How
many of you find it necessary to "pump the yoke"to get a smooth low speed
landing? I'll go first... not me. Is something wrong with my airplane or
just every other Piper in the world?

Joe Schneider
N8437R



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