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Difference Between -ER And -LR Variants  
User currently offlineIsmangun From Indonesia, joined Jan 2001, 117 posts, RR: 10
Posted (11 years 1 month 1 week 3 days 8 hours ago) and read 6460 times:

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...
7 replies: All unread, jump to last
User currently offlineAirxLiban From Lebanon, joined Oct 2003, 4525 posts, RR: 52
Reply 1, posted (11 years 1 month 1 week 3 days 7 hours ago) and read 6445 times:

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.

User currently offlineHa763 From United States of America, joined Jan 2003, 3710 posts, RR: 5
Reply 2, posted (11 years 1 month 1 week 3 days 5 hours ago) and read 6398 times:
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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.

User currently offlineAJ From Australia, joined Nov 1999, 2403 posts, RR: 24
Reply 3, posted (11 years 1 month 1 week 2 days 6 hours ago) and read 6288 times:

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.

User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 4, posted (11 years 1 month 1 week 1 day 23 hours ago) and read 6253 times:

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"
User currently offlineIsmangun From Indonesia, joined Jan 2001, 117 posts, RR: 10
Reply 5, posted (11 years 1 month 3 days 3 hours ago) and read 6092 times:

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

If it's an Airbus, I'll take the bus...
User currently offlineCapital146 From United Kingdom, joined Jun 2003, 2125 posts, RR: 41
Reply 6, posted (11 years 1 month 2 days 18 hours ago) and read 6061 times:

I presume that the A319LR can also carry more fuel than a standard A319?

Like a fine wine, one gets better with age.
User currently offlineDfwRevolution From United States of America, joined Jan 2010, 1068 posts, RR: 50
Reply 7, posted (11 years 1 month 1 day 13 hours ago) and read 5970 times:

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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