Upgrading from C172SP to 182S

Matt Whiting wrote:




I still wouldn't rule out getting a small pebble or stone into the prop
if you are sliding the wheels to a stop in gravel. The propwash might
sling a small stone into the nosewheel where it could bounce forward
into the prop. Similarly, if the nosewheel is pushing through gravel at
any rate of speed, stones could bounce forward off the nosewheel.

When landing the engine is at idle so there's no chance of the prop
picking up anything. I suppose it's theoretically possible to have the
nosewheel pushing thru gravel and have one get launched into the prop.
Haven't seent it happen though. Having said all that I have no interest
in keeping my prop nick free if that means eliminating what is fun about
flying. A prop is simply another part. I had my 182 for a little over
7 years. Never had any problems with the prop.

Newps wrote:



Matt Whiting wrote:




I still wouldn't rule out getting a small pebble or stone into the
prop if you are sliding the wheels to a stop in gravel. The propwash
might sling a small stone into the nosewheel where it could bounce
forward into the prop. Similarly, if the nosewheel is pushing through
gravel at any rate of speed, stones could bounce forward off the
nosewheel.


When landing the engine is at idle so there's no chance of the prop
picking up anything. I suppose it's theoretically possible to have the
nosewheel pushing thru gravel and have one get launched into the prop.
Haven't seent it happen though. Having said all that I have no interest
in keeping my prop nick free if that means eliminating what is fun about
flying. A prop is simply another part. I had my 182 for a little over
7 years. Never had any problems with the prop.

I had mine for six years and likewise had no problem flying from a
gravel and grass strip, but I certainly didn't intentionally slide the
tires at any time.

I also never had a problem with the firewall, but the previous owner had
bent it and struck the prop when he stalled in in from about 6'
according to witnesses. I can't imagine how anyone could do that with a
Skylane, but apparently it happens in addition to folks just plain
flying it onto the nosewheel while landing. Landing a Skylane is a
piece of cake, yet folks seem to screw it up with some frequency.


Matt

Any air being sucked in
from the front, and I don't believe there is, is not strong enough to
pick up rocks.

This brings up an interesting (to me, anyway) observation I made last
weekend, while parking over 130 aircraft.

Despite the fact that a propellor is putting out enough "wind" to pull
a 3000 pound aircraft across a grass field, I can stand literally
nose-to-nose with the spinner, and NOT get "sucked in" to the prop.

Thank goodness, I might add.

I knew this all along, after being parked a few hundred (thousand?)
times without dicing up the lineman, but I'd never personally observed
it before.

This seems counter-intuitive, though, and a casual observer would think
that the "suction" should equal the "out-flow". (Of course, it *does*
-- the air just isn't all coming in from directly in front of the prop
arc.)

At my airport our taxiway is in sad shape, and it's due to be repaved
this summer. We pick up new prop chips on most flights, despite NEVER
taxiing above 1000 RPM, and being extremely careful about where we
taxi. This seems to show that props DO suck rocks into them,
somehow...
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

"Jay Honeck" wrote in message
oups.com...
Despite the fact that a propellor is putting out enough "wind" to pull
a 3000 pound aircraft across a grass field, I can stand literally
nose-to-nose with the spinner, and NOT get "sucked in" to the prop.

I hope this is just a that you don't understand the meaning of the word
"literally" (perhaps you meant "virtually"?), and that you were NOT actually
nose-to-nose with an operating airplane.

If you were "literally nose-to-nose", then I'd say all the other discussions
about instrument ratings, preflight inspections, etc. are moot. You just
have a death wish.

[...]
This seems counter-intuitive, though, and a casual observer would think
that the "suction" should equal the "out-flow". (Of course, it *does*
-- the air just isn't all coming in from directly in front of the prop
arc.)

Precisely. Note, of course, that depending on how much inflow there is,
there can still be a lot of "suction". Enough people have gotten sucked
into turbine engines to show that (I think you even have one or two on your
web site).

At my airport our taxiway is in sad shape, and it's due to be repaved
this summer. We pick up new prop chips on most flights, despite NEVER
taxiing above 1000 RPM, and being extremely careful about where we
taxi. This seems to show that props DO suck rocks into them,
somehow...

I have to admit, I'm a bit spoiled what with having the engine on top of the
airplane and all.

And yes, it is always theoretically possible for a rock to wind up hitting
the prop, by whatever means. That doesn't change the fact that Newps is
right, the greatest risk is during the run-up (I know some pilots do a
rolling runup when space permits, to try to minimize this issue), and that
it's not normally a big problem for landing (when the throttle is at idle,
the nose is high off the ground, and the airplane is moving forward).

Pete

On Sat, 27 May 2006 15:22:26 -0700, Peter Duniho wrote:

the greatest risk is during the run-up

My experience has been that the greatest risk is *someone else's* run-up.
Too many do run-ups w/o having a care where the tail is pointed. And
since a couple of our club aircraft are tied-down relatively near a run-up
area...

Fortunately, we're not right at the end. But I'm sorry for those aircraft
that are given the lack of consideration of others.

- Andrew

In article .com,
"Jay Honeck" wrote:

At my airport our taxiway is in sad shape, and it's due to be repaved
this summer. We pick up new prop chips on most flights, despite NEVER
taxiing above 1000 RPM, and being extremely careful about where we
taxi. This seems to show that props DO suck rocks into them,
somehow...

I was going to cheerfully bring that up when you broached the gravel
topic. :-))