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RUDAS
19th Feb 2004, 19:21
as the header states,i was wondering if anyone knows why indian airlines has a double-bogey gear on their a320s? do any other carriers have this? what is the reason for this?

rotornut
19th Feb 2004, 19:30
Ever flown on Indian Airlines? If you have you'll know the answer.
Seriously, though, I was in an IA 737 that bounced on landing at Pune a few years ago.:oh:

fritzi
19th Feb 2004, 22:10
why indian airlines has a double-bogey gear on their a320s

Because they use the A320´s to airports whos runways arent the greatest. The bogey landing gear reduces the footprint on of the aircraft, which spreads out the weight over a larger area.

do any other carriers have this?this

Nope, no other airlines have chosen this option.


PS, it is only a bogey gear. (4 wheels per MLG strut)

halas
23rd Feb 2004, 12:25
Noticed in EGLL one night following some Icelandic mob that their A320 had double bogies as well.

So the Indians are not alone with this option.

Suspect it has something to do with PCN's to where they operate.

halas

DoctorA300
23rd Feb 2004, 15:32
Halas,
You WROOOONNNNGGGG on two accounts,
1. There are NO Icelandic (TF-XXX) reg A320
and
2.There is no icelandic mob.........only Vikings
Suggest you brush up on your spotting skills.
:E :E :E
Brgds
Doc

JW411
24th Feb 2004, 03:49
Indeed Indian Airlines chose this option because of the poor PCNs found at a lot of their destinations.

A good friend of mine who was in a position to influence the specification of the A320s that his company bought quite a few years ago told me that they looked at this option since some of their destinations (Greek Islands for example) had a PCN problem also.

It was quickly discovered that the purchase of several good dinners for those selected airfield operators then allowed them to land "on an occasional basis". This was a lot cheaper than paying for the huge increase in fuel burn that carrying 8 mainwheels around all the time would have caused!

supercarb
24th Feb 2004, 08:15
Iceland Air has B757s. Could possibly be mistaken for an A320 from a distance on a dark night....

Seagul1
24th Feb 2004, 13:46
Believe they r carrying 500kgs extra and r stuck with the option because its too expensive to change now but i guess it helped them when they needed it? a pity...:ugh:

rotornut
25th Feb 2004, 23:40
FEBRUARY 25, 2004

Air Deccan, India’s first low-cost carrier, has chosen Airbus’ A320 family to expand services to major Indian cities from its Bangalore base. It will acquire two new Airbus A320s from Airbus, and has taken options on two more. In addition, it will lease a further five A320s from Singapore Aircraft Leasing Enterprise (SALE).


Deliveries of the leased aircraft will begin in July this year, while those of the new aircraft from Airbus will start in September 2005.


All of the aircraft will seat 180 passengers in an all-economy layout and will be powered by International Aero Engines V2500-A5 engines.


“With our low-cost approach, we naturally wanted the most economical aircraft for the job, and the Airbus A320 was the clear winner in our evaluation,” says Air Deccan Managing Director Captain G.R. Gopinath. “We also recognised that the Airbus A320’s cabin is the widest and most spacious in its class, which will allow us to compete with other carriers on product, as well as cost.”


Air Deccan currently flies seven ATR 42 turboprops on services from Bangalore to cities in the south of India. Air Deccan intends to use the A320 to expand its low-cost operation throughout India.


“We are delighted that Air Deccan will become another customer and operator of the Airbus A320 family, which is increasingly successful in the low-cost market – as well as with full-service carriers,” says Airbus President and Chief Executive Officer No'l Forgeard. “We look forward to being Air Deccan’s partner as it expands in the important Indian market."


Airbus’ A320 family is the most successful aircraft family in the world, having been chosen by more than 160 customers and operators around the world, including many in Asia-Pacific. Firm orders for the Airbus A320 family stand at some 3,100 aircraft, more than 2,100 of which have been delivered to date.


Airbus is an EADS joint Company with BAE Systems.

halas
27th Feb 2004, 12:24
Doctor300

Yes you are right l will have to brush up on spotting skills. Don't think l have them anyway. Indeed it was a dark wet night.

However l don't think l am wrong on the second point of PCN.

How does arctic mob sound?

halas

rampman
28th Feb 2004, 03:13
i saw a royal jordanian A320 at dubai airport in 1999 with double bogey gear

DoctorA300
28th Feb 2004, 06:40
Halas,
Websters New dictionary of political correct terms, list 'em as "North atlantic Anti law enforcrment merchent naval organtiaon"
:} :} :} :} :E
Brgds
Doc

OverRun
28th Feb 2004, 20:10
Geez Halas – you sure were right about the PCN.

I got inspired to get off my backside and work through the lowered ACN/PCN for the A320 with bogie gear. It helps that Ross has just given me the latest performance manuals.

What a difference the bogie gear makes :8

Assuming a 73.5 tonne aircraft, this means about 33 tonnes on one main gear leg.
For a twin gear, tyre pressure = 1340 kPa (not that tyre pressure makes much of a difference): ACN = 38
For a bogie gear, tyre pressure = 1220 kPa. ACN = 19. It's half !

Working it backwards, for a runway with PCN 19 (which means it can be used without restriction by aircraft of up to ACN 19) the bogie gear aircraft can use it @ 73.5 tonnes. But the twin gear A320 is restricted to 40 tonnes. That's right – 40 tonnes. Enough for 1 pilot, no pax, no fuel and no catering. Now allowing 25% overload for the purpose of occasional ops, that would allow ACN = 19 * 1.25 = 24. That is still only 48.8 tonnes.

If those selected airfield operators read PPRUNE, they'll be back asking for more good dinners.

halas
29th Feb 2004, 00:41
Gees Doc300

And people jump down my throat for spelling.

You take the cake mate!

halas

Captain Stable
1st Mar 2004, 00:20
Play nicely please, children! ;)