CROSS-BLEED START

triple7

triple7

Well-Known Member
Can someone explain a cross bleed start. I was listening to DCA ground freq out at the airport on friday and a unite 757 needed to push back into the alley, but had to have it clear behind in order to do a CB start. ground asked if he could taxi on one engine and they said negative. so, two us-air planes ready to push had to wait while they started up. a huge plume of smoke filled the alley. then afterwards the US air pilot asked ground "arent we not supposed to do cb starts in the alley?" 1) what is a cb start, and 2) why do they need room behind?

thanks for the info.
 
[ QUOTE ]
1) what is a cb start, and 2) why do they need room behind?

[/ QUOTE ]
A cross bleed start uses bleed air from one engine to start the other (without the APU bleed air). This can require a rather high power setting in order to achieve the air pressure necessary to start the other engine. That pretty much aswers both questions.....he didn't want to blow over anything/body behind him.
 
[ QUOTE ]
[ QUOTE ]
1) what is a cb start, and 2) why do they need room behind?

[/ QUOTE ]
A cross bleed start uses bleed air from one engine to start the other (without the APU bleed air). This can require a rather high power setting in order to achieve the air pressure necessary to start the other engine. That pretty much aswers both questions.....he didn't want to blow over anything/body behind him.

[/ QUOTE ]

Brings back a memory or two, of a similar thing we did in the Caribou.

Called a "buddy start", used if your battery was dead, hence no normal start. Takes two airplanes parked nose to tail. Guy in front runs up engines, and guy behind uses the blast of air to spin his engines for a start! (Someone told me once a C130 can do the same thing.)

You can imagine on a dirt strip, one that periodically has members of the bovine species milling around, what else got hurled at the rear airplane along with that howling wind made by the front airplane!

Talk about the [censored] (fecal matter) hitting the fan! (biblically speaking!)

Nothing like a trip down memory lane....!
 
hell you think one 757 at DCA is bad...listen to Philly Ground during Express rush hour...

"Air shuttle XXXX needs to do a cross bleed start..."

"Air shuttle YYYY needs to do a cross bleed start..."

"Air shuttle ZZZZ needs a GPU and an air cart for the turn..."

60psi and let her rip boys...

Etc...
bandit.gif
 
[ QUOTE ]
hell you think one 757 at DCA is bad...listen to Philly Ground during Express rush hour...

"Air shuttle XXXX needs to do a cross bleed start..."

"Air shuttle YYYY needs to do a cross bleed start..."

"Air shuttle ZZZZ needs a GPU and an air cart for the turn..."

60psi and let her rip boys...

Etc...
bandit.gif


[/ QUOTE ]

Is that the ERJs or CRJs? The CRJ APUs were famous for failing in inclement weather.
 
You must log in or register to reply here.
Back
Top