British forces have transported a huge hydro
electric power turbine more than 100 miles through
Taleban territory. Tags :BBCNewsUKtroopsdeliverAfghanturbine
The braking mechanism that limits the speed of the
wind turbine broke during a storm in Denmark. This
was the outcome. 02/22-2008.
http://jp.dk/uknews/article1277616.ece
Bonus info:
-The tower of the mill was 60m high
-Wind speed was probably around 30 m/s
-You can see a truck at the base of the mill, but
nobody was hurt. The mill had been evacuated 400m
in each direction.
Vote Elgaard-Collins '08!! Tags :windmillexplosiondenmarkstormwindturbine
GE90-115B Gas Turbine Jet Engine Testing and
Evaluation
I takes a lot of money and time to test as
thoroughly as the FAA, military, and GE require.
More money and time and lives are saved by finding
most problems before they become much larger.
Some claim US gas turbine aircraft engines can't
take turbulence or odd angles of attack. The claim
is clearly false, if you note the shot of the
crosswind testing fans. The crosswind fans can
simulate hurricane winds at any angle. The fan and
the engine can be pivoted to simulate any angle.
Typically it is some former soviet block people
that make those claims. They think just because
they carelessly showboat fighters at air shows
doing extreme AOA, that they are the only ones
that can do so. The fact is that we don't make a
habit of showboating at air shows because it is
risky. The former soviet block has crashed a lot
of fighters showboating extreme AOAs. The fact is
any time you move a gas turbine with reverse
airflow your risk of a flameout increases
dramatically. The exhaust can recirculate back
into the intake the result can be a backfire or
flameout or just reduced power; all can be fatal
if you are flying with no margin of error at an
air show.
Normally; US pilots are told to avoid doing things
that can cause cavitation or recirculation,
particularly wile airborne. They are tested at
higher altitude in remote areas to give a good
chance of recovery, and restart, and if nothing
else ejection.
There are some exceptions (sometimes turbofans and
turboprops), but it still can be a little risky to
the engine.
Note this C-17 backfire. I think there was no real
damage to the engine in this case.
http://www.youtube.com/watch?v=BPm2z4V43Bw Tags :GE90-115BGEGeneralElectricC4TestingTestEvaluationGasTurbineJetEngineGE90