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Help Barb get her CRJ 700! (Read 3653 times)
May 19th, 2009 at 12:06pm

Barbr   Offline
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Conversation last night:

Me to my hubby: "Hey, do you like it? It's our new CRJ paint!"

Him: "Umm... we're not buying it for our airline (FS Passengers)."

Roll Eyes Typical, raining on my parade...

Huh  "Why not?"

"Look! It only carries 70 passengers, and for the price we might as well download another 737 to earn more $$ per flight."

"But.... "  Embarrassed


Okay, so is there any advantage to the CRJ 700 over the 737 on real life routes?

Smiley
 
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Reply #1 - May 20th, 2009 at 4:13am

ozzy72   Offline
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Get in and out of smaller airfields? More economical on fuel Wink
 

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Reply #2 - May 20th, 2009 at 9:41pm

Sean_TK   Offline
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Depends on the routes you would use. You may be better off with the CRJ on routes from hubs to small airfields, whereas the 737 may be better on routes between hubs.

Overall, I would use 737s mainly at fairly sizable airfields, and CRJs to get into the niche regional regions.
Smiley

Here is a list of airliners by seat-capacity, for what its worth to you:
http://en.wikipedia.org/wiki/List_of_airliners_by_seat_capacity

Obviously not all inclusive, but it should give you a general idea of what to look for.

You might also want to take a look at the Dash-8 Q400. Seats around 70 and is very economical. (turboprop)
http://en.wikipedia.org/wiki/Bombardier_Dash_8
 

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Reply #3 - May 20th, 2009 at 9:48pm

ShaneG   Offline
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Sean_TK wrote on May 20th, 2009 at 9:41pm:
You might also want to take a look at the Dash-8 Q400. Seats around 70 and is very economical. (turboprop)
http://en.wikipedia.org/wiki/Bombardier_Dash_8



Just make sure to tighten the lug nuts. Wink Grin
 
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Reply #4 - May 20th, 2009 at 9:49pm

Sean_TK   Offline
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Yeah, buy some spare tires and you'll be fine.  Grin

EDIT: And if you want to scare & deafen Greenpeace *or any other environmental/noise control organization, take a Tupolev! (A Tu-134 to be exact!)
 

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Reply #5 - May 20th, 2009 at 10:08pm

Isak922   Offline
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Sean_TK wrote on May 20th, 2009 at 9:49pm:
Yeah, buy some spare tires and you'll be fine.  Grin

EDIT: And if you want to scare & deafen Greenpeace *or any other environmental/noise control organization, take a Tupolev! (A Tu-134 to be exact!)


A passenger modified C-5A Galaxy could work too! They do call it FRED... Freaking Ridiculous Environmental Disaster.

Or if you're looking for speed... There's always the XB-70... It does have a bomb-bay... Cool Roll Eyes Tongue
 

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Reply #6 - May 20th, 2009 at 11:57pm

BigTruck   Offline
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Like the others said, the CRJ would be able to fly you into more airports as it can probably land on shorter runways than a 737.

That and it looks much prettier than a 737 in my opinion, but that's a whole different thread topic  Smiley
 

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Reply #7 - May 21st, 2009 at 12:25am

Barbr   Offline
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Thanks guys, I appreciate your expertise!

Well, I bought it anyways, I took my husband's advice "under advisement"  Wink  As with the actual Lufthansa flights, I did a Dusseldorf -> Nice, which was fun. It seems like the plane has a higher take-off / landing speed than the 737-800, so can it really go to smaller airports?

It also seems to burn quite a lot of fuel! I wonder if in real life it's really that cost economical.

-Barb  Smiley
 
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Reply #8 - May 21st, 2009 at 3:20am

expat   Offline
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For what it is worth, here is my input. The CRJ is an illegitimate son of a lady who works odd hours on a Saturday night and does not have time to pull her underpants up........from a maintenance point of view that is. It is a horrible little aircraft. Any aircraft that you have to climb over the centre console to get into the cockpit should have been put down at birth Grin Give me a 737 NG over the CRJ anytime.

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Reply #9 - May 21st, 2009 at 12:26pm

Barbr   Offline
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expat wrote on May 21st, 2009 at 3:20am:
For what it is worth, here is my input. The CRJ is an illegitimate son of a lady who works odd hours on a Saturday night and does not have time to pull her underpants up........from a maintenance point of view that is. It is a horrible little aircraft.


Wow, you certainly seem to have a lot of experience with the CRJ. It would be neat if the maintenance specific to each aircraft was modeled within FS Passengers such that the "cost to own" is reflected.

Just wondering: What makes one plane so much harder to maintain than another?
 
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Reply #10 - May 21st, 2009 at 2:57pm

aussiewannabe   Offline
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Barbr wrote on May 21st, 2009 at 12:25am:
It also seems to burn quite a lot of fuel!

Check the fuel burn rate in the aircraft.cfg file.
I had a Citation 2 that came with fuel burn rate correction. Turns out it was the same model as another one I have. It had a poor range even at cruising speed. Changed it from 2.5 to 1.5 and got an increase in range of 600-700nm.
 

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Reply #11 - May 21st, 2009 at 3:35pm

expat   Offline
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Barbr wrote on May 21st, 2009 at 12:26pm:
expat wrote on May 21st, 2009 at 3:20am:
For what it is worth, here is my input. The CRJ is an illegitimate son of a lady who works odd hours on a Saturday night and does not have time to pull her underpants up........from a maintenance point of view that is. It is a horrible little aircraft.


Wow, you certainly seem to have a lot of experience with the CRJ. It would be neat if the maintenance specific to each aircraft was modeled within FS Passengers such that the "cost to own" is reflected.

Just wondering: What makes one plane so much harder to maintain than another?


The CRJ is just a Challenger on steroids, so from a maintenance point of view it has everything shoehorned in to very small spaces. Under the cabin for example, accessed from under the aircraft is an avionics compartment that runs just about the length of the aircraft. My shoulders touch the side walls. You lay on your back, belly or side when working here. If small tight places are not your cup of tea, then this aircraft will not be one of your favorites to work with. Also brake units and main wheels are changed on your knees with with the back of your neck pressed up against the underside of the wing. I changed an APU once and myself and the guy with me nearly put her on her tail due to the C of G being changed by two guys doing a two man task Grin

Matt
 

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Reply #12 - May 21st, 2009 at 3:42pm

Barbr   Offline
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aussiewannabe wrote on May 21st, 2009 at 2:57pm:
Check the fuel burn rate in the aircraft.cfg file.
I had a Citation 2 that came with fuel burn rate correction. Turns out it was the same model as another one I have. It had a poor range even at cruising speed. Changed it from 2.5 to 1.5 and got an increase in range of 600-700nm.


How would one find the "correct" number?
 
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Reply #13 - May 21st, 2009 at 3:57pm

Sean_TK   Offline
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This also begs the question in regard to your flying style. If you are using excessive engine power for flight operations, you will probably have a bit of a fuel issue.  Wink

Once again, purely from an economic standpoint. (While keeping in mind desired seat capacity.) I recommend the following:

Dash-8 Q400
SAAB 2000
Fokker 50
Fairchild Metroliner
 

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Reply #14 - May 21st, 2009 at 5:48pm

aussiewannabe   Offline
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Barbr wrote on May 21st, 2009 at 3:42pm:
How would one find the "correct" number?

Here's what I've found:
fuel_flow_scalar (found in aircraft.cfg) - Scalar for modifying the fuel flow required by the engine(s). A value of less than 1.0 causes a slower fuel consumption for a given power setting, a value greater than 1.0 causes the aircraft to burn more fuel for a given power setting.

Examples:
Airbus A321( fuel_flow_scalar = 1 )
Aircreation582SL( fuel_flow_scalar= 1.000 )
Boeing 747-400( fuel_flow_scalar = 1.0 )
Beech Baron 58( fuel_flow_scalar= 0.9 )

I found this for a POSKY CRJ-700
fuel_flow_scalar = 1.035


Sean is right. You might be using excessive engine power which is burning your fuel more than it should.

Below 10,000 ft, you should not exceed 250kts (approx. .37 mach). I'm sure there are some charts online that show what speed the CRJ-700 should be at certain altitudes as you climb. I see that the max for this AC is .86 mach. There are converters online such as
http://www.unitconversion.org/unit_converter/velocity-ex.html if you would rather go by knots.

Does your AC come with an autothrottle (A/T) switch by chance?

Chris
 

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Reply #15 - May 22nd, 2009 at 11:37am

Barbr   Offline
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aussiewannabe wrote on May 21st, 2009 at 5:48pm:
Sean is right. You might be using excessive engine power which is burning your fuel more than it should.

Below 10,000 ft, you should not exceed 250kts (approx. .37 mach). I'm sure there are some charts online that show what speed the CRJ-700 should be at certain altitudes as you climb. I see that the max for this AC is .86 mach. There are converters online such as
http://www.unitconversion.org/unit_converter/velocity-ex.html if you would rather go by knots.

Does your AC come with an autothrottle (A/T) switch by chance?

Chris


Thanks for the advice -- my other half said that he'll look into the programming for me as soon as I watch Terminator 3 and Salvation with him (not a bad deal!  Grin)... he was playing around with some free aircraft sounds last night and made a lot of our AI traffic with roaring rumbling engines now... pretty cool!

Not sure if this is anywhere close to realistic, my usual routine is as follows:

1) Take off around 160kts, depending on the a/c,
2) Climb at around 3000ft/min and at 220-230kts, usually meaning about 70-80% engine,
3) Once I pass 10000ft, I increase the autothrottle to about 290kts,
4) Back down to about 2300ft/min by FL180, keep it at about 290kts,
5) By about FL250, I reduce the climb to 1500ft/min or so, and leave it at a cruising mach.

Does that sound about right?

Thanks,
-Barb  Wink


 
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Reply #16 - May 22nd, 2009 at 11:57am

aussiewannabe   Offline
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Looks good to me Wink
 

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Reply #17 - May 22nd, 2009 at 6:35pm

Sean_TK   Offline
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Looks like a good flight profile to me too. Obviously you will encounter differences depending on the aircraft, but that plan seems good as a generic setup.  Smiley
 

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Reply #18 - May 29th, 2009 at 4:50pm

Travis   Offline
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As a general rule, when I'm trying to test the fuel efficiency of any aircraft, I start up a flight and just let it fly straight, going as far as it can before it runs out of fuel.  Take into account the amount of fuel you need to get it down and on the ground, including at least 45 minutes minimum fuel reserve for IFR flights, and then compare the distance you traveled to the range listed in the specs.  Adjust fuel consumption accordingly.
 

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