cancidas
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EMB-170 Airstairs

Mon Sep 03, 2007 4:56 am


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how do pax and crew gain access to this airplane? does it have the same airline non-airstair door installed or are there after-market stairs designed for that airplane? i've tried to search for something but haven't found anything as yet... kinda defeats the purpose to have an airplane that depends solely on jetbridges and ground stairs outside of the airlines.

[Edited 2007-09-02 22:00:37]
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roseflyer
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RE: EMB-170 Airstairs

Mon Sep 03, 2007 6:11 am

I believe that Embraer may have tried to install a stair system like the one that is optional on the 737 or A320, but I'm not sure. It certainly wouldn't be in the door like it is on the ERJ145.
If you have never designed an airplane part before, let the real designers do the work!
 
Viscount724
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RE: EMB-170 Airstairs

Mon Sep 03, 2007 9:10 am

Forward airstars are optional. The Embraer 170 demonstrator below is so equipped.


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Following photo from Embraer website. Caption reads:

An optional self-contained airstair on all models means E-Jets can operate virtually anywhere.

 
cancidas
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RE: EMB-170 Airstairs

Mon Sep 03, 2007 10:00 am

is the same available on the -175, -190 and -195? how does it stow/ retract? is it manual or hydraulic?
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EMBQA
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RE: EMB-170 Airstairs

Mon Sep 03, 2007 10:22 am

Quoting Cancidas (Reply 3):
is the same available on the -175, -190 and -195? how does it stow/ retract? is it manual or hydraulic?

They're all the same plane, so yes. Electric.... but cost, weight and required space have been the big downside
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roseflyer
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RE: EMB-170 Airstairs

Mon Sep 03, 2007 11:25 am

Quoting Cancidas (Reply 3):
is the same available on the -175, -190 and -195? how does it stow/ retract? is it manual or hydraulic?

You couldn't have them be hydraulic since hydraulics only work when the pumps are energized, which means that the engines are on unless the electric motor pumps are being operated, which is unusual without the engines on.
If you have never designed an airplane part before, let the real designers do the work!
 
srbmod
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RE: EMB-170 Airstairs

Tue Sep 04, 2007 8:33 am

Quoting EMBQA (Reply 4):

They're all the same plane, so yes. Electric.... but cost, weight and required space have been the big downside

Which is why many airlines don't have integral airstairs. They were an optional feature on the 717 as well. These days, the number of commercial airports with regular scheduled that would require an airline to use integral airstairs are far less than say 30-40 years ago when a/c like the 727, DC-9, and 732 first came out. And those airports that still board using stairs typically have them as GSE (either airport owned/operated or airline owned/operated).
 
loggat
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RE: EMB-170 Airstairs

Tue Sep 04, 2007 11:30 pm

Quoting RoseFlyer (Reply 5):
You couldn't have them be hydraulic since hydraulics only work when the pumps are energized, which means that the engines are on unless the electric motor pumps are being operated, which is unusual without the engines on.

Not quite. Such as in the case of the EMB-145, the stairs can be raised using stored hydraulic pressure in an accumulator. The activation solenoid is on the hot battery bus. This means you can use the stairs on a completely dark airplane.
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cancidas
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RE: EMB-170 Airstairs

Wed Sep 05, 2007 3:36 am

Quoting Loggat (Reply 7):
Not quite. Such as in the case of the EMB-145, the stairs can be raised using stored hydraulic pressure in an accumulator. The activation solenoid is on the hot battery bus. This means you can use the stairs on a completely dark airplane.

that depends actually. there is only enough stored pressure for one or two retractions. it does mean that you can fly an airplane in, power it down and leave the door open for the caterers or cleaners to work overnight. once they're done, all it takes is pushing a button to close the door. it does take a little longer to retract than when the airplane is power-up but it servs the purpose nonetheless. IMO, great tool to simplify life...
"...cannot the kingdom of salvation take me home."
 
flyboy80
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RE: EMB-170 Airstairs

Wed Sep 12, 2007 1:08 pm

Interesting, I believe the brasillia must have power to close the door...hence its usually closed manually from the ground at night.
 
CanadianNorth
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RE: EMB-170 Airstairs

Mon Oct 01, 2007 6:02 pm

Not really relative to the E-jet, but I myself have extended the fwd stairs on our 737-200 on a completely dark aircraft (with just pulling out the thing and holding the button).


CanadianNorth
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EMBQA
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RE: EMB-170 Airstairs

Mon Oct 01, 2007 7:16 pm

Quoting Flyboy80 (Reply 9):
I believe the brasillia must have power to close the door...hence its usually closed manually from the ground at night.

Not true. It must still have some charge left it the hydraulic system. If not, you must close it by hand.... the ERJ is the same way
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Dufo
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RE: EMB-170 Airstairs

Mon Oct 01, 2007 9:43 pm

True about the Brasilia. According to manuals, hyd. reservoir pressure is sufficient for four door cycles but it is possible to raise the door by hand. Been there done that - not that hard actually.
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