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CRJ tips and rules of thumb

Old 03-21-2009, 09:08 AM
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Default CRJ tips and rules of thumb

So, I get a call the other day from one of my fellow furloughees and we discuss some of the things we are doing to keep the brain atrophy to a minimum. Thinking about it, there is many rules of thumb and tips that we all use in the performance of our job. I would like all of you to offer your experience and guidance in any aspect of flying the CRJ, this includes those that do not post but simply lurk on this web board. No tip is trivial or too complicated. Just post anything that you think will help. For example, a simple contribution would be using the fix button on the FMS to visually keep track of your next fuel qty check. Or maybe using the fix button with a 30 mi ring as a reminder to be approx 10,000' and 250 kts for the arrival. Or it could be as complicated as this: ATC instructs " insert your airline 500, proceed direct Greenwood (GRD), then outbound on the 130 radial to intercept the 050 inbound to Colliers (IRQ). Use the place bearing distance function "GRD130/99" and insert on the legs page, next go to the fix page and insert IRQ and the crossing radial of 050, you will distance crossing of 27 miles. Go back to the legs page and modify your GRD130/99 to GRD130/27. From that waypoint add direct to IRQ. If you look at the bearing to on the legs page, it may be off slighty from what ATC instructed, so consequently you can trim up the GRD pbd to match. OK, so maybe this is somewhat complicated but please add anything you like.
One more thing, this thread is to help others and also our fellow furloughed folks, so please contribute.

Does anybody remember the rule of thumb on the CRJ200 concerning the N1 thrust setting inside the FAF and fully configured? I believe it was whatever your landing weight is, i.e. 41,000, you would use, 41% N1. I can't remember if that was correct.

Thanks to all
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Old 03-21-2009, 09:22 AM
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The ones I use most often are.....

For your cruise power at level off go to the legs page, hit leg data, and match the FF. You will be dead on your speed as planned in Vnav. If it shows 2880- then make each engine to 1440lbs. If you only see DES create a fix outside the descent fix and you get your FF.

For landing trim settings.... Take .2 off the trim setting for every hour of flight. If your T/O trim is 7.0 and you have a 1 hour flight 6.8 works great once you fully configure at flaps 45. Power settings depends on too many factors but 55-65% typically works.

If you have a positive differential pressure when going to open the cabin door turn the packs off and back on and it will be 0.0

VS 1.8 down and 250kts works at idle.

If you get a check pos msg and want to update the VOR to use you can simply type the ID for the VOR into the VOR 1/2 Freq line on the radio page. Ex. Flying around MEM and get check pos? Type MEM over the Freq and it will come up 117.5/MEM- then reselect autotune and MEM is used first. This is also VERY helpful with rnav deferred or being told direct to a VOR and the chart isn't out or the FMS is deferred for whatever reason (typically a database). Just type it in and the freq is up!

40% N1 works well to keep the A/I on or the packs blowing air in the decent.

There is a laundry list of CB combos of the various reset jet messages but I don't think its smart to put those up....
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Old 03-21-2009, 09:40 AM
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Originally Posted by MD11 View Post
Or it could be as complicated as this: ATC instructs " insert your airline 500, proceed direct Greenwood (GRD), then outbound on the 130 radial to intercept the 050 inbound to Colliers (IRQ). Use the place bearing distance function "GRD130/99" and insert on the legs page, next go to the fix page and insert IRQ and the crossing radial of 050, you will distance crossing of 27 miles. Go back to the legs page and modify your GRD130/99 to GRD130/27. From that waypoint add direct to IRQ. If you look at the bearing to on the legs page, it may be off slighty from what ATC instructed, so consequently you can trim up the GRD pbd to match.
I'm pretty sure we have the same FMS as your CRJs, but there's an easier way to do this. Just type in "GRD130/IRQ050" and it'll do the point bearing to point bearing to get exactly what ATC wants.
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Old 03-21-2009, 09:52 AM
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Pull back, the cows get smaller. Push in, they get bigger.

You said nothing was too trivial.
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Old 03-21-2009, 09:59 AM
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N1 is a high power thing.. approach and landing i fly using the N2 between 80 and 84 depending on the temp.
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Old 03-21-2009, 10:07 AM
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Pretty sure that gross weight + 20 for N1 fully configured worked well, at least for me. E.g. 41,000 would be approx 61%. N1.
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Old 03-21-2009, 10:12 AM
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Originally Posted by bryris View Post
Pull back, the cows get smaller. Push in, they get bigger.

You said nothing was too trivial.
Keep pulling back, and they'll get bigger again !
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Old 03-21-2009, 10:40 AM
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Originally Posted by Speedbird172 View Post
Pretty sure that gross weight + 20 for N1 fully configured worked well, at least for me. E.g. 41,000 would be approx 61%. N1.
yeah thats what i was going to say. take landing weight and add 20 for your target n1. works good.

also this plane doesn't like to descend and slow at the same time, so plan ahead!

thats pretty much all i have.
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Old 03-21-2009, 10:59 AM
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Originally Posted by MD11 View Post
I would like all of you to offer your experience and guidance in any aspect of flying the CRJ,
Auto, check. Auto, check. Auto, check. FADEC, check. Probe heat, check. Magazines, check.
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Old 03-21-2009, 11:28 AM
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60-65% N1 on ILS' always keeps you in the ballpark for slowing to Vref past the FAF. Also, if your descending through 11000 for <10000 over 300kts, if you pull to idle and set VS for 800-900 ft per min, you will to slow to 250 right at 10K.
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