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17 May 2025, 10:14 [ UTC - 5; DST ]


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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 14 May 2018, 22:23 
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Paul:

Interesting. I just thought with engine out flaps 0 would reduce drag and give you a little better climb speed.

I have noticed the CJ1 sim needs way more rudder OEI than does the 550. Like wayyyyy more. I wonder if the fact that is shorter has something to do with it?

In general engine out seems like more work in this sim.

My imagination?


Mark,

Flaps zero might be the best configuration for the Citations OEI, but for the heavies, they depend on all of the leading edge devices being deployed for a much lower stalling speed for maneuvering for an emergency return; for the 747 it's 5 degrees of trailing edge flaps, which also has all leading edge flaps deployed. The first flap notch is one degree that deploys half of the LED's and extends the trailing edge flaps outward for expanded wing area, the second notch of flaps is five degrees that extends the rest of the LED's, and deflects the trailing edge flaps down five degrees to increase wing camber, lowering the stall speed 40 knots.



Regardless of what the final flap setting might be per aircraft type, the common denominator is to wait until 1500 to change flap configuration.

As I recall at the time I was still working, the standard noise abatement procedure was to climb with takeoff off flaps and take off power at V2 to V2+10 to 1500 feet, then to accelerate, clean up and reduce to climb power.

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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 14 May 2018, 22:51 
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Username Protected wrote:
Paul:

Interesting. I just thought with engine out flaps 0 would reduce drag and give you a little better climb speed.

I have noticed the CJ1 sim needs way more rudder OEI than does the 550. Like wayyyyy more. I wonder if the fact that is shorter has something to do with it?

In general engine out seems like more work in this sim.

My imagination?


I've been regularly flying a straight CJ and a CJ2 and I can definitely tell you the V1 cuts in the CJ are more sporty than the CJ2. I was told it was lack of rudder bias on the straight CJ and the shorter fuselage that caused the difference. Of course I just recently did my multi commercial in a travel air, so both the CJ's seem so much easier than that. The hardest thing to do in the jet, is to do nothing at all.

How are you liking the bleed air? Am I correct this will be your first jet without wing boots?


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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 14 May 2018, 23:05 
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Username Protected wrote:

Climb CJ2 at VS 1500 fpm and take whatever climb speed you get instead of FLC at 230 kts. Reduce VS to keep at least 20 kts above the doughnut once in the FLs. Keep an eye on airspeed in VS climb and don't let AP fly into a stall.



Allen,

Although that would work, personally I've never used that method at high altitude, but rather maintain a cruise Mach number and let the plane drift up.

The high altitude CJ2 accident that I provided the link to in an earlier post happened when the pilot used VS and got distracted, stalled, and rolled about 8 times, with permanent deformation of the wings.

We've talked about buffet margins of the Citation, which don't seem to be much of a concern, but stall the airplane at FL450 and it might be your last flight. This is where flying SP has some of it's pitfalls; operating in an extremely unforgiving environment, no matter how docile the plane is thought to be.


As I said you have to monitor airspeed if climbing in VS mode.

Climbing in FLC at 230 kts/Mach .56 does not work well in the CJ2. The Collins AP hunts and does not hold a consistent airspeed.

My first choice to climb in the CJ2 is VS mode and sty in the loop. If the cockpit gets busy punch VS off and put the AP in pitch mode with 5 degree up climb pitch. At whatever altitude you run out of energy you won't stall but level off.

Climbing the CJ2 above FL410 to FL450 takes specific actions to coax it up there at 300 - 500 fpm. PIC is actively managing VS or pitch.
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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 14 May 2018, 23:17 
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Hot wing will be great. Yes my first. In the sim it isn’t really a factor obviously.

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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 14 May 2018, 23:22 
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I would not be in a rush to make changes.

Use the extra time to think.


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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 14 May 2018, 23:27 
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Username Protected wrote:
Hot wing will be great. Yes my first. In the sim it isn’t really a factor obviously.


Remember to turn off wing heat immediately after landing. Or it can be a $150K mistake.

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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 14 May 2018, 23:55 
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Username Protected wrote:
Hot wing will be great. Yes my first. In the sim it isn’t really a factor obviously.


Remember to turn off wing heat immediately after landing. Or it can be a $150K mistake.


Well that’s a good tip that no one has shared. Oral test / flash card item is the 2 min ground limit of pitot heat. Not a word on hot wing limits. :crazy:
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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 15 May 2018, 00:07 
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Loft Flashcards.


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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 15 May 2018, 00:24 
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Loft Flashcards.



Obviously the jet has a good stall margin with zero flaps at V2+10, but I don't understand retracting flaps at 400 feet and accelerating to Venr (enroute speed) before 1500.


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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 15 May 2018, 05:58 
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Username Protected wrote:
Obviously the jet has a good stall margin with zero flaps at V2+10, but I don't understand retracting flaps at 400 feet and accelerating to Venr (enroute speed) before 1500.


Weird certification thing. I just climb to 1500 like all other jets do. They removed that in the CJ1 and brought it in line with the rest of the jet world.

Andrew


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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 15 May 2018, 11:02 
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Username Protected wrote:
Remember to turn off wing heat immediately after landing. Or it can be a $150K mistake.


Well that’s a good tip that no one has shared. Oral test / flash card item is the 2 min ground limit of pitot heat. Not a word on hot wing limits. :crazy:


Warning on having wing heat on more then 1 minute on the ground is in OM.

May cause structural damage to the wing leading edge (wrinkling) and damage to your wallet.

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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 15 May 2018, 11:25 
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I assume the WING ANTI-ICE light is only on when the wing leading edge is above a certain temperature? If that’s true, is idle thrust enough to extinguish the light? If not, reading the manual section that you’ve posted, it seems there’s little to no risk of doing damage by simply forgetting to turn off the wing anti-ice after landing, since you’d be at idle, or close to it, with the WING ANTI-ICE light on.


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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 15 May 2018, 11:30 
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Username Protected wrote:
I assume the WING ANTI-ICE light is only on when the wing leading edge is above a certain temperature? If that’s true, is idle thrust enough to extinguish the light? If not, reading the manual section that you’ve posted, it seems there’s little to no risk of doing damage by simply forgetting to turn off the wing anti-ice after landing, since you’d be at idle, or close to it, with the WING ANTI-ICE light on.


Problem is after landing, which is when I told Mark to make sure to turn off wing heat, the WING ANTI-ICE light will be off and the wing LE very hot. You don't want to keep the LE hot on the ground, even with idle thrust level of bleed air.

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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 15 May 2018, 12:40 
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Seems like the system should have an interlock based on WoW switch or a temperature sensor to prevent this.

The WoW switch should be an easy method to make sure you are not heating on the ground.

Mike C.

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 Post subject: Re: My first 60 hours in a CJ2
PostPosted: 15 May 2018, 13:13 
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Username Protected wrote:
Seems like the system should have an interlock based on WoW switch or a temperature sensor to prevent this.

The WoW switch should be an easy method to make sure you are not heating on the ground.

Mike C.


Except you want to heat the wings while on the runway before departing into icing conditions.

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