2 min per engine start
Moderators: North Shore, sky's the limit, sepia, Sulako, lilfssister, I WAS Birddog
Re: 2 min per engine start
It’s great when your making double time, annoying the rest of the time.
Re: 2 min per engine start
Re: 2 min per engine start
Reminds me of the Metros with Garrett turboprops. I parked beside one once and the F/A asked why they were spinning the props. I told her it was to wind up the engine starters for the next flight.
DEI = Didn’t Earn It
Re: 2 min per engine start
Garrett pilots are here reading this like, “Yeah, and…?”
Re: 2 min per engine start
Same as the 321neo.
On the bus, once you hit the starter switch a timer appears on the ecam which is indicating the time of dry run prior to light off. It could be up to 5 minutes.
The difference on the bus is the dual cooling feature, which when start selector is to start, if both engines require a cool you hit the dual cooling switch prior to ignition and both engine dry motor prior to start.
It’s a bitch if both engines require two min cooling and you forget to hit the dual cool.
On the bus, once you hit the starter switch a timer appears on the ecam which is indicating the time of dry run prior to light off. It could be up to 5 minutes.
The difference on the bus is the dual cooling feature, which when start selector is to start, if both engines require a cool you hit the dual cooling switch prior to ignition and both engine dry motor prior to start.
It’s a bitch if both engines require two min cooling and you forget to hit the dual cool.
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co-joe
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- Location: YYC 230 degree radial at about 10 DME
Re: 2 min per engine start
The Boeing term is BRM - bower rotor motoring as your link shows.rudder wrote: ↑Sun Jul 04, 2021 5:07 amShaft straightening on the Leap engine.
https://aviationjourneys.com/what-is-bo ... g-737-max/
from www.b737.org.ukThis is to straighten the N1 and N2 shafts which may have bowed due to thermal buildup after the previous shutdown. BRM will be active from 6 to 90 seconds and MOTORING will be displayed on the N2 gauge between 18-24%.
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Eric Janson
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Re: 2 min per engine start
When I flew older IAE powered A320s there was an issue with high vibration during engine start due to shaft bowing.
Several procedures were tried - none of which really helped.
Finally the manufacturer increased the vibration limits from 5 units to 6.5 units and that solved it!
Rolls Royce engines can have a very long start time as the engine needs to be motored until EGT is below 100c.
Several procedures were tried - none of which really helped.
Finally the manufacturer increased the vibration limits from 5 units to 6.5 units and that solved it!
Rolls Royce engines can have a very long start time as the engine needs to be motored until EGT is below 100c.
Always fly a stable approach - it's the only stability you'll find in this business
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flying4dollars
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- Joined: Mon Jul 09, 2007 8:56 am
Re: 2 min per engine start
Is this intended to straighten the compressor shaft or to true up the compressor rotor disc(s)?
Re: 2 min per engine start
Gulfstream 280 is similar. If the engines need to be started between 15-180mins after shutdown, they have to be dry motored.
