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Difference Between -ER And -LR Variants

Sat Jun 26, 2004 3:22 pm

Sorry (again and again)if this topic had been brought forward before, bute surely I've had missed it.

What exactly make a variant an -LR or an -ER? I know that the increase in range is the point, but is it decided by the extra mileage, or percentage-increase of the range, or even other reasons?

One friend of mine brought this question up and left me speechless.

If it's an Airbus, I'll take the bus
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RE: Difference Between -ER And -LR Variants

Sat Jun 26, 2004 3:38 pm

the only LR I am aware of is the 777-200LR.

That is because there is already a 777-200ER.

ER is the first stage. Notice how there is no 777-300LR. Its just -300 and -300ER. If Boeing were to come up with an even longer range variant, it would be the 777-300LR.
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RE: Difference Between -ER And -LR Variants

Sat Jun 26, 2004 6:08 pm

The ERJ145 is also available in ER, LR, and XR varients.

It all depends on range. For the 777-200, the base -200 has the shortest range, -200ER more than the base, -200LR the most range. The same goes for the ERJ145. The ER has the shortest range, followed by the LR, topped by the XR.
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RE: Difference Between -ER And -LR Variants

Sun Jun 27, 2004 4:30 pm

They are really just marketing tools, with the prefix denoting an improved model.

Boeing used to add 'Advanced' to models to denote improvement, although towards the end of the 727 production run they introduced the 'LR'. Ansett operated four Boeing 727-277LRs.
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RE: Difference Between -ER And -LR Variants

Mon Jun 28, 2004 12:06 am

As for the Embraer 135 / 145......

the EMB-135 / 145ER has a dry center wing box........
the EMB-145 / 145LR has a wet center wing box.......
the EMB-145XR has a wet center wing box and an added fuel tank behind the wing root.
"It's not the size of the dog in the fight, but the size of the fight in the dog"
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RE: Difference Between -ER And -LR Variants

Sat Jul 03, 2004 7:46 pm

Wow.. thanks for all replies.
So it's a matter of marketing stuff than technical.
Not only Miller have their 'Genuine Drafts', 'Lites', and "Genuine Draft Lites'..  Laugh out loud
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RE: Difference Between -ER And -LR Variants

Sun Jul 04, 2004 5:18 am

I presume that the A319LR can also carry more fuel than a standard A319?
Like a fine wine, one gets better with age.
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RE: Difference Between -ER And -LR Variants

Mon Jul 05, 2004 9:46 am

While this does not apply to non-Boeing aircraft, an -ER suffix denotes a B-market aircraft (6000-8000nm) and an -LR suffix denotes a C-market aircraft with 8000+ nm of range.
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