AirWillie6475
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ERJ And CRJ, Size Difference

Sun Feb 11, 2007 12:25 pm

Which aircraft is bigger in terms of size? We don't get that many ERJs around here so I don't really have a visual idea of what it looks like up close.
 
EMBQA
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ERJ And CRJ, Size Difference

Sun Feb 11, 2007 12:27 pm

What series CRJ...??? There are 3.....???? CRJ200/700/900.
What series ERJ...??? There are 2.....???? EMB135/145.

CRJ200 is fatter...... ERJ-145 is longer.....both hold 50 pax

[Edited 2007-02-11 04:39:15]
"It's not the size of the dog in the fight, but the size of the fight in the dog"
 
loggat
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ERJ And CRJ, Size Difference

Sun Feb 11, 2007 12:38 pm

The CRJ-200 weighs more than the ERJ-145 for the same number of people.
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flyf15
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ERJ And CRJ, Size Difference

Sun Feb 11, 2007 12:46 pm

The ERJ-145 and CRJ-200 are very similar in terms of size. I think the CRJ looks a little beefier due to its wider fuselage and lower stance to the ground.
 
PPVRA
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ERJ And CRJ, Size Difference

Sun Feb 11, 2007 1:02 pm

Quoting EMBQA (Reply 1):
CRJ200 is fatter...... ERJ-145 is longer.....both hold 50 pax

Crudely put, that would be correct.

The ERJ is skinnier and longer.

Here in ATL there are tons of CRJs as well, and when you do see one, it looks a little odd since you're used to seeing short/beefy CRJs.

The opposite is also true. The CRJs look really short after seeing many ERJs at different airports.
"If goods do not cross borders, soldiers will" - Frederic Bastiat
 
PPVRA
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ERJ And CRJ, Size Difference

Sun Feb 11, 2007 1:04 pm

Quoting Flyf15 (Reply 3):
I think the CRJ looks a little beefier due to its wider fuselage and lower stance to the ground.

I've noticed that also. The ERJs seem much higher off the ground.

Any reason for that?
"If goods do not cross borders, soldiers will" - Frederic Bastiat
 
flyf15
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ERJ And CRJ, Size Difference

Sun Feb 11, 2007 1:17 pm

Quoting PPVRA (Reply 5):
I've noticed that also. The ERJs seem much higher off the ground.

Any reason for that?

Well, I didn't design either airplane, but heres what I know about it. There is a maximum height that the floor of the pax door can be off the ground without requiring an escape slide. Its something like 5 1/2 feet. There is also, for every aircraft, a minimum height the tail can be off the ground and assure that you won't have tailstrike issues. So... the nose as to be no greater than a height off the ground and the tail has to be no less than a height off the ground.

The CRJ-200 is short enough that it is able to meet both of these requirements and still sit level on the ground. The ERJ-145 is a longer airplane, which means the tail is going to have to be higher off the ground to avoid tailstrikes. But, you can't raise the nose... so the nose sits the same height (nose gear is not lengthened), but the body sits higher up the farther back you get (main gear is lengthened) in order to get the tail high enough off the ground. This explains why the ERJ-145 sits higher than the CRJ-200.

This is the same reasoning as to why the CRJ-700 and -900 have such a nose low / tail high stance on the ground. Tail high enough to avoid tailstrikes, nose low enough to not require escape slides out the doors.
 
PPVRA
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ERJ And CRJ, Size Difference

Sun Feb 11, 2007 1:26 pm

Quoting Flyf15 (Reply 6):

This is the same reasoning as to why the CRJ-700 and -900 have such a nose low / tail high stance on the ground. Tail high enough to avoid tailstrikes, nose low enough to not require escape slides out the doors.

Interesting. Makes sense.

Thanks!
"If goods do not cross borders, soldiers will" - Frederic Bastiat
 
graphic
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ERJ And CRJ, Size Difference

Sun Feb 11, 2007 1:29 pm

Quoting Flyf15 (Reply 6):

This is one of those things I'm gonna have to memorize when I go for the ATP, isn't it?  Sad
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flyf15
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ERJ And CRJ, Size Difference

Sun Feb 11, 2007 1:53 pm

Quoting Graphic (Reply 8):
This is one of those things I'm gonna have to memorize when I go for the ATP, isn't it? Sad

Nah, I've never been asked any questions like that on any oral, written, or practical exams.. and trust me, I've been through a lot of them.. I've got 9 ratings now. I haven't either been instructed anything like that. Its not really all that important to know, and I bet that although they could figure it out if they thought about it, most airline pilots wouldn't know that off the top of their head. I just know it because, in addition to being an airline pilot, I'm also a complete and total aviation dork.
 
STJ
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ERJ And CRJ, Size Difference

Sun Feb 11, 2007 3:10 pm

Quoting EMBQA (Reply 1):
CRJ200 is fatter...... ERJ-145 is longer.....both hold 50 pax

CRJ = 2x2 PAX seating

ERJ = 1x2 PAX seating

Another reason the CRJ cabin is wider and the ERJ is longer.
 
planemaker
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RE: ERJ And CRJ, Size Difference

Sun Feb 11, 2007 6:22 pm

Quoting EMBQA (Reply 1):
What series ERJ...??? There are 2.....???? EMB135/145.

Only 2??? Check again.  Smile

Quoting Flyf15 (Reply 6):
But, you can't raise the nose... so the nose sits the same height (nose gear is not lengthened),

You can't raise the nose any higher than they are not because of any evacuation slide rules but principaly because of the airstair door limitation.  Smile

Even at the low height the door sill is at, the CRJ700/900's airstair door still needs to have a bottom step that "flops" open so that pax can reach the tarmac without any ground support equipment.

Quoting Flyf15 (Reply 6):
This is the same reasoning as to why the CRJ-700 and -900 have such a nose low / tail high stance on the ground.

Aside from the reason outlined above for the low nose, the severity of the high/low stance appearance really depends on how heavy the aircraft is loaded. The main landing gear struts "shrink" quite dramatically when the CRJ700/900s are fully loaded with pax and fuel.
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PlymSpotter
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RE: ERJ And CRJ, Size Difference

Sun Feb 11, 2007 6:39 pm

Quoting Planemaker (Reply 11):
Only 2??? Check again.

Indeed, just what I was thinking, also there are several more variants of the CRJ.

I find the CRJ is much roomier inside than the 145, which certainly didn't have a positive impression on me. You might want to take a look at this comparison thread over in Polls and Preferences;

http://www.airliners.net/discussions/aviation_polls/read.main/114789/


Dan Smile
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planemaker
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RE: ERJ And CRJ, Size Difference

Sun Feb 11, 2007 6:48 pm

Quoting PlymSpotter (Reply 12):
also there are several more variants of the CRJ

Yes, there are two more "basic" CRJ variants (for a total of 5 "basic" variants) but there are only 3 CRJ fuselage lengths in total.
Nationalism is an infantile disease. It is the measles of mankind. - A. Einstein
 
EMBQA
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RE: ERJ And CRJ, Size Difference

Sun Feb 11, 2007 10:35 pm

Quoting Planemaker (Reply 11):
Only 2??? Check again

D'oooh...... EMB-140...!!
"It's not the size of the dog in the fight, but the size of the fight in the dog"
 
penguinflies
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RE: ERJ And CRJ, Size Difference

Mon Feb 12, 2007 1:23 am

Also if you look at some of the -700s, some do have tail "bumpers" to avoid a trail strike, and some do not. GoJet is a good example, 151-159 have tail bumpers, 160-165 do not--due to an "adjustment" at the factory.
 
N766UA
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RE: ERJ And CRJ, Size Difference

Mon Feb 12, 2007 1:53 am

Quoting EMBQA (Reply 14):
D'oooh...... EMB-140...!!

Technically the E-140 is an E-135KL. Eagle and Chautauqua call them 140s, but they're on the 135's operating certificate. So yeah, it'd be 2 if you really wanted to get into it.
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planemaker
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RE: ERJ And CRJ, Size Difference

Mon Feb 12, 2007 2:10 am

Quoting N766UA (Reply 16):
So yeah, it'd be 2 if you really wanted to get into it.

Technically they are not, TCs notwithstanding. The facts are that there are 3 variants by pax number and fuse lengths.  Smile


ERJ 135: 26.33 m and 37 pax
ERJ 140: 28.45 m and 40 pax
ERJ 145: 29.9 m and 50 pax
Nationalism is an infantile disease. It is the measles of mankind. - A. Einstein
 
EMBQA
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RE: ERJ And CRJ, Size Difference

Mon Feb 12, 2007 3:34 am

Quoting N766UA (Reply 16):
So yeah, it'd be 2 if you really wanted to get into it.

No, there are actully three. I forgot about the 140. It's such a small production run and limited use plane I forgot about it.

All ERJ's share the same type certificate number, but come in three sizes. 135, 140, 145.

EMB-145...EMB-145XR
EMB-135...EMB-135BJ...EMB-140
"It's not the size of the dog in the fight, but the size of the fight in the dog"
 
N766UA
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RE: ERJ And CRJ, Size Difference

Mon Feb 12, 2007 3:48 am

Quoting Planemaker (Reply 17):
Technically they are not, TCs notwithstanding. The facts are that there are 3 variants by pax number and fuse lengths.

Eh, splittin' hairs. The 140 is a variant of the 135, so you could say the 135 and 145 are the only variants of the ERJ. Or you can say all 3 are variants. Or you could say the XR is it's own also, and there are 4 total. Whatever, doesn't matter to me. Just figured I i might try to insight an argument.  silly 
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drewwright
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RE: ERJ And CRJ, Size Difference

Mon Feb 12, 2007 12:26 pm

E-140 has the worst performance of all the ERJ's though. It has 135 engines with a larger fuselage and higher weights. Pilots would rather fly the 135 or the 145. Unless itis a MP or LR model....

Drw