Running runup?

"Dale" wrote in message
...

Have you tried it?

Yes. At 2000 rpm I would accelerating at quite a clip. After a couple
hundred yards I'd be doing in excess of 30 mph.

Dale,

Have you tried it? Sure, you'll be moving faster than a "walking pace"
taxi, but not so fast as to be a hazard.


Yes. And I disagree. Definitely hazardous.

--
Thomas Borchert (EDDH)

On Wed, 30 Jun 2004 11:18:19 -0800, Dale wrote:

Watch an airplane during a runup with standing water on the surface.
Directly under the prop you'll see a little "mini tornado" of water
being picked up from the surface.

This is why I follow the newsgroups. You never can tell when you'll
pick up some priceless bit of information!

I look forward to my next visit to Alton Bay to see if it happens on
the lake. (Perhaps not, since the runups presumably are all running.)


all the best -- Dan Ford
email: (put Cubdriver in subject line)

The Warbird's Forum www.warbirdforum.com
The Piper Cub Forum www.pipercubforum.com
Viva Bush! weblog www.vivabush.org

Newps wrote:

Yes. At 2000 rpm I would accelerating at quite a clip. After a couple
hundred yards I'd be doing in excess of 30 mph.

If I tried to do my runup with no brakes, I'd be airborne before I finished the mag
check.

George Patterson
None of us is as dumb as all of us.

In article ,
"Newps" wrote:


Yes. At 2000 rpm I would accelerating at quite a clip. After a couple
hundred yards I'd be doing in excess of 30 mph.


Good grief, how long does it take you to cycle a prop? G You're only
at that power setting for a few seconds...but by all means do what
you're comfortable with.

--
Dale L. Falk

There is nothing - absolutely nothing - half so much worth doing
as simply messing around with airplanes.

http://home.gci.net/~sncdfalk/flying.html

"Dale" wrote in message
...
In article ,
"Newps" wrote:


Yes. At 2000 rpm I would accelerating at quite a clip. After a couple
hundred yards I'd be doing in excess of 30 mph.


Good grief, how long does it take you to cycle a prop? G You're only
at that power setting for a few seconds...but by all means do what
you're comfortable with.

Prop, mags and carb heat are done at 1700 rpm in virtually all Cessna's.
The exact rpm isn't important.

In article ,
"Newps" wrote:



Prop, mags and carb heat are done at 1700 rpm in virtually all Cessna's.
The exact rpm isn't important.


The Hartzell prop needs 2000 RPM.

--
Dale L. Falk

There is nothing - absolutely nothing - half so much worth doing
as simply messing around with airplanes.

http://home.gci.net/~sncdfalk/flying.html

On 7/1/04 4:40 AM, in article ,
"Cub Driver" wrote:

On Wed, 30 Jun 2004 11:18:19 -0800, Dale wrote:

Watch an airplane during a runup with standing water on the surface.
Directly under the prop you'll see a little "mini tornado" of water
being picked up from the surface.

This is why I follow the newsgroups. You never can tell when you'll
pick up some priceless bit of information!

The same thing is often seen below the engine inlets of airliners with low
wing-mounted engines (737s, and others) on wet taxiways.


--
Jack
~~~~~~~~~~~~~~~~~~~~~

~~~~~~~~~~~~~~~~~~~~~

"G. Burkhart" wrote in message news:lk6Ec.1801$AI.68@attbi_s04...
When I did my training my CFI taught me to stop at the run-up area and
go through the run-up checklist. This was done at airports that had run-up
areas readily available. Fairly recently, I went with an instructor that


In the sea plane we do them during take off. You never want to move
the throttle above idle for any reason other than take off because it
picks the water up and dings the prop. You have to reduce the number
of seconds you spend at non-idle throttle.

-Robert

On 6 Jul 2004 21:15:39 -0700, (Robert M. Gary) wrote:

You never want to move
the throttle above idle for any reason other than take off because it
picks the water up and dings the prop.

Aha! Now I really want to spend a few hours at Alton Bay (NH) and see
this phenom for myself.

(I've only ever been to Alton Bay in the winter, at least with respect
to airplanes. I mispent a lot of time there when I was in high school,
looking for the girls of summer.)

all the best -- Dan Ford
email: (put Cubdriver in subject line)

The Warbird's Forum www.warbirdforum.com
The Piper Cub Forum www.pipercubforum.com
Viva Bush! weblog www.vivabush.org