Redline (inspired by Gross Weight)

So, how far over redline is it "ok" to operate an aircraft, and how
arbitrary is that red line (both on the tach and the airspeed indicator)
and how is it determined?

Jose
--
Nothing takes longer than a shortcut.
for Email, make the obvious change in the address.

hehehe.......and how long could you fly over redline (airspeed) before
structural failure. Yikes....this one could get ugly

Fred


"Jose" wrote in message
...
So, how far over redline is it "ok" to operate an aircraft, and how
arbitrary is that red line (both on the tach and the airspeed indicator)
and how is it determined?

Jose
--
Nothing takes longer than a shortcut.
for Email, make the obvious change in the address.

Ask the aircraft and engine manufacturers.

Jose wrote:
So, how far over redline is it "ok" to operate an aircraft, and how
arbitrary is that red line (both on the tach and the airspeed indicator)
and how is it determined?

Jose

Jose wrote:
So, how far over redline is it "ok" to operate an aircraft, and how
arbitrary is that red line (both on the tach and the airspeed indicator)
and how is it determined?

Red line airspeed is a pretty specific thing. Unlike yellow line which
is only a problem in turb, red line is the point that things (like
wheel paints) begin to take damage. Red line is not a "if lots of
things happen it will be a problem" its a "something wasn't made strong
enough to do this".

"Jose" wrote in message
...
So, how far over redline is it "ok" to operate an aircraft, and how
arbitrary is that red line (both on the tach and the airspeed indicator)
and how is it determined?

Check the engine manual. It will generally give detailed information about
what action(s) need(s) to be taken after exceeding some operational limit
for some amount of time.

For example (an invented example, not necessarily from any actual engine
manual), disasssembly and inspection of the engine if the RPM limit has been
exceeded for more than 5 minutes.

You'll find limits for RPM, temperature, manifold pressure, and possibly
some others.

Pete

On 2005-07-10, Jose wrote:
So, how far over redline is it "ok" to operate an aircraft, and how
arbitrary is that red line (both on the tach and the airspeed indicator)
and how is it determined?

Well of course it all depends on how much over gross you are...

--
Ben Jackson

http://www.ben.com/

Jose wrote:

So, how far over redline is it "ok" to operate an aircraft, and how
arbitrary is that red line (both on the tach and the airspeed indicator)
and how is it determined?

Jose

Basically, the same answer as for the "gross" weight question.


Matt

"Jose" wrote in message
...
So, how far over redline is it "ok" to operate an aircraft, and how
arbitrary is that red line (both on the tach and the airspeed indicator)
and how is it determined?

Jose
--
Nothing takes longer than a shortcut.
for Email, make the obvious change in the address.

IIRC, civil aircraft are tested to redline + 10% during the certification
process. That doesn't mean they won't safely fly at redline +11% or more,
but they have only been tested to redline +10%...

"Jose" wrote in message
...
So, how far over redline is it "ok" to operate an aircraft, and how
arbitrary is that red line (both on the tach and the airspeed indicator)
and how is it determined?

Jose
--
Nothing takes longer than a shortcut.
for Email, make the obvious change in the address.

Nobody really knows. Redline on a piston airplane (turbines are different)
is usually set at 90% or Vd which is the highest speed demonstrated in a
dive without flutter or other problems. This is with a new airplane with
new hinges pivots ect.

Mike
MU-2

Some red lines are only there because of noise (engine PA36-375)
"Mike Rapoport" wrote in message
k.net...

"Jose" wrote in message
...
So, how far over redline is it "ok" to operate an aircraft, and how
arbitrary is that red line (both on the tach and the airspeed indicator)
and how is it determined?

Jose
--
Nothing takes longer than a shortcut.
for Email, make the obvious change in the address.

Nobody really knows. Redline on a piston airplane (turbines are
different)
is usually set at 90% or Vd which is the highest speed demonstrated in a
dive without flutter or other problems. This is with a new airplane with
new hinges pivots ect.

Mike
MU-2