Avro jets
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Discussion

EK993

Original Poster:

1,951 posts

267 months

Friday 2nd October 2009
quotequote all
The 4 engine type that fly from City Airport - think they have an RJ designation.

What is going on when it sounds like they are starting up the additional 2 engines a few minutes after takeoff, and on landing sounds like they are switching off two of the engines during the approach??

anonymous-user

70 months

Friday 2nd October 2009
quotequote all
I really doubt they are taking off on two engines or shutting down any on approach. Perhaps the noise is the gear or flap?

EK993

Original Poster:

1,951 posts

267 months

Friday 2nd October 2009
quotequote all
el stovey said:
I really doubt they are taking off on two engines or shutting down any on approach. Perhaps the noise is the gear or flap?
Am 99.9% sure it is jet engine powering up / down noise...

dr_gn

16,566 posts

200 months

Friday 2nd October 2009
quotequote all
EK993 said:
The 4 engine type that fly from City Airport - think they have an RJ designation.

What is going on when it sounds like they are starting up the additional 2 engines a few minutes after takeoff, and on landing sounds like they are switching off two of the engines during the approach??
BAe 146? There is one APU in the tail.

anonymous-user

70 months

Friday 2nd October 2009
quotequote all
Maybe it's the air conditioning packs.

Some aircraft when performance limited do 'packs off 'take offs as the aircon usually takes bleed air from the engines. They might need the extra umph for take off and then can switch the aircon on again after take off.

The packs might be switched off on approach incase of a go around?


EK993

Original Poster:

1,951 posts

267 months

Friday 2nd October 2009
quotequote all
Its the Avro RJ85.

RizzoTheRat

26,971 posts

208 months

Friday 2nd October 2009
quotequote all
Do thay have to do noise abated takeoffs out of London City? ie climb out on reduced power to keep the noise down until a certain height or distance.


EK993

Original Poster:

1,951 posts

267 months

Friday 2nd October 2009
quotequote all
RizzoTheRat said:
Do thay have to do noise abated takeoffs out of London City? ie climb out on reduced power to keep the noise down until a certain height or distance.
Actually yes that could well be it.

eharding

14,549 posts

300 months

Friday 2nd October 2009
quotequote all
el stovey said:
Maybe it's the air conditioning packs.

Some aircraft when performance limited do 'packs off 'take offs as the aircon usually takes bleed air from the engines. They might need the extra umph for take off and then can switch the aircon on again after take off.

The packs might be switched off on approach incase of a go around?
One of the local Nanchang drivers flies the RJ from City, and I do remember him saying there was all manner of fertling around with the aircon packs that needs to be done in short order quite late in the approach for exactly that reason.

Eric Mc

123,959 posts

281 months

Friday 2nd October 2009
quotequote all
The BAe 146 and the RJ85 are very much one and the same plane.

The plane began life as the Hawker Siddeley HS146 but by the time it first flew in 1981, HS were part of British Aerospace. It was therefore known as the BAe 146.
Later on BAe in their wisdom decided to rebrand the aircraft as an Avro - even though the project had originally been drawn up by the old De Havilland team at Hatfield and it no lineage with the Avro division of BAe - except that some of the production was at the old Avro factory at Woodford (which is now going to close).