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EMB-170 Airstairs  
User currently offlineCancidas From Poland, joined Jul 2003, 4112 posts, RR: 11
Posted (7 years 2 weeks 2 days 17 hours ago) and read 8062 times:


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Photo © Herson Mendes



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]


"...cannot the kingdom of salvation take me home."
12 replies: All unread, jump to last
 
User currently offlineRoseFlyer From United States of America, joined Feb 2004, 9637 posts, RR: 52
Reply 1, posted (7 years 2 weeks 2 days 15 hours ago) and read 8044 times:

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!
User currently offlineViscount724 From Switzerland, joined Oct 2006, 25310 posts, RR: 22
Reply 2, posted (7 years 2 weeks 2 days 12 hours ago) and read 8014 times:

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.



User currently offlineCancidas From Poland, joined Jul 2003, 4112 posts, RR: 11
Reply 3, posted (7 years 2 weeks 2 days 12 hours ago) and read 8003 times:

is the same available on the -175, -190 and -195? how does it stow/ retract? is it manual or hydraulic?


"...cannot the kingdom of salvation take me home."
User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 4, posted (7 years 2 weeks 2 days 11 hours ago) and read 8001 times:

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



"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineRoseFlyer From United States of America, joined Feb 2004, 9637 posts, RR: 52
Reply 5, posted (7 years 2 weeks 2 days 10 hours ago) and read 7995 times:

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!
User currently offlineSrbmod From , joined Dec 1969, posts, RR:
Reply 6, posted (7 years 2 weeks 1 day 13 hours ago) and read 7885 times:

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).


User currently offlineLoggat From United States of America, joined Feb 2000, 666 posts, RR: 0
Reply 7, posted (7 years 2 weeks 22 hours ago) and read 7842 times:

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.



There are 3 types of people in this world, those that can count, and those that can't.
User currently offlineCancidas From Poland, joined Jul 2003, 4112 posts, RR: 11
Reply 8, posted (7 years 2 weeks 18 hours ago) and read 7811 times:

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."
User currently offlineFlyboy80 From United States of America, joined Jul 2001, 1878 posts, RR: 3
Reply 9, posted (7 years 1 week 8 hours ago) and read 7658 times:

Interesting, I believe the brasillia must have power to close the door...hence its usually closed manually from the ground at night.

User currently offlineCanadianNorth From Canada, joined Aug 2002, 3390 posts, RR: 9
Reply 10, posted (6 years 11 months 3 weeks 2 days 4 hours ago) and read 7361 times:

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



What could possibly go wrong?
User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 11, posted (6 years 11 months 3 weeks 2 days 2 hours ago) and read 7356 times:

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



"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineDufo From Slovenia, joined May 1999, 798 posts, RR: 4
Reply 12, posted (6 years 11 months 3 weeks 2 days ago) and read 7338 times:

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.


I seriously think I just creamed my pants without any influence from any outside variables.
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