Citation Cockpit - Angle of Attack

[@nevillec5252]

Excellent information that is not widely taught. Thank you. Happy to subscribe for this kind of useful content.

[@GHerrera93]

Thank you!! Keep bringing them! Greets from Argentina

[@jaimefabrega9635]

Very good video. I would like to see one video on AOA use for landings

[@TheFalconJetDriver]

You are living on the edge! Great information!

[@lbowsk]

Thanks for this. Just got a job flying an ancient (1979 full steam-gauge) Slowtation. ;) We're pretty much a speed bump in the NE. Went to FSI in MCO and nary a peep about the AOA. Our plane uses a Rosemont. I have picked up some good intell in your videos. The .25 and .35 info here is particularly useful.

[@citationpro]

Congrats on the new job! Are you flying a Citation I or II? The Citation II is the oldest variant I have time in. For that airplane, the book says you can take it to FL410, but real world, it rarely makes it that high on anything but the longest legs at the lightest weights. They are so underpowered by jet standards. I'd flight plan for FL350/FL360 on most legs. Still, a great airplane. Enjoy it!

[@lbowsk]

@@citationpro I believe it's a 2 because it has TRs. But, I'm not positive. I don't know bupkis about most GA aircraft. It really is a pig once you get it up past the mid-20s but I've been flying transports for the last 30 years and as such, I am used to planes with bigger balls and far more capability. I took it to 330 last week and then we went to 370 because we were trying to dodge boomers. I really wanted the additional altitude for extra top clearance and visibility. You see, It only has a toy radar! ;) Once we got there it was fine, but there was precious little left so we were very careful. The fuel burn was impressive. The Mach, not so much. We are taking delivery of a Bravo model in the next few weeks. I flew it twice two months ago and it is a MUCH nicer and more capable jet. I am looking forward to flying it.

[@citationpro]

@@lbowsk That's great, the Bravo is definitely a nicer airplane. As you've already seen, don't put too much trust in the radar with any of these older jets. Try to stay visual and go around buildups whenever possible. Happy flying!

[@ellonga18]

Great data! Keep going!

[@citationpro]

Thanks for watching! More videos on the way.

[@jamesconvery4793]

On a V1 cut, at V1, should the AOA indicate .6 ?

[@citationpro]

@@jamesconvery4793 Great question! To be honest, I've never paid close attention to AoA during a V1 cut. V1 is a decision speed, not a flying speed, therefore AoA is irrelevant at V1--the airplane is still on the ground at that moment. V1 speed always comes before Vr, the speed at which the nose should be lifted off the ground and flight begins. I think V2 (best angle of climb on a single engine) would probably correlate more closely to 0.6 AoA, however, I'm not sure how closely it correlates. I suspect V2 might be a little faster than 0.6 AoA because it's not accounting for strictly the wing's performance, it also relates to the ability to maintain directional control. I'll try to take a closer look at this detail next time I get a chance. A very interesting question indeed!

[@jamesconvery4793]

.35 is best range .6 is Vref .7 is V2 Thank you for your video for me to better understand the Citation AOA !

[@diederikschip6190]

You're one of the few who sees the big advantage of an AOA. Question for you: what kind of AOA is it? What sensor does it use? Differential pressure? And what do you think of 2 separate working AOA's , one on each wing?

[@citationpro]

In these Citations, the AOA probe is a physical vane located on the copilot side of the fuselage. It streamlines into the relative wind in order to provide a reading and requires normal DC electric power to operate. I'd be in favor of two separate AOAs, simply because I like redundancy, although I don't think it's necessary in the straight wing Citations. They have very docile stall characteristics and the AFM clearly says the AOA gauge should be considered a secondary instrument with the airspeed indicator as a primary instrument. As a side note, I've test flown a couple Citations for maintenance checks and specifically checked the accuracy of the AOA probe. The procedure is to load the aircraft to the forward CG limit, then fly in level flight in various configurations (cruise, approach, and landing). Gross weight and airspeed is recorded when flying at 0.6 AOA then compared to a graph of what it should be under those conditions. If it falls outside of a four knot tolerance, it needs to be adjusted. What these checks showed me is that there are quite a few conditions when the AOA might not be perfectly accurate. It made me realize why Cessna declares it a secondary instrument. Great information 90% of the time, but a pilot shouldn't rely solely on AOA during critical maneuvers.

[@diederikschip6190]

@@citationpro thank you for the response, much appreciated. I got a bit of passion for AOA lately. I think it's a misunderstood or underused sensor in the cockpit. There are couple of ways to measure AOA, a vane is sturdy simplest design. Other question, the AOA on the citation ultra, are the procedures and use described in the manual from AOA sensor manufacturer?

[@citationpro]

@@diederikschip6190 the manuals do a good job of describing the system and what it does. For example, it describes the approximate AOA reading which will set off the stick shaker, what conditions will cause the cockpit annunciator to illuminate (such as loss of power to the heating element) and so on. It really does not say much about how to actually use the AOA reading in flight though. I believe all of the text comes from Cessna rather than the actual subcontractor who produced the part. Or maybe Cessna produced the part? I don't know. I've never dug into it that deeply.

[@diederikschip6190]

@@citationpro thanks again, I'm gonna read the manual, if I find it somewhere.

[@citationpro]

@@diederikschip6190 try www.smartcockpit.com/aircrafts-models.html. They have quite a few Citation manuals there.

[@charlesstiles342]

Great teaching! How about a video demonstrating the AOA indicator for approach and landing (“fly the wing”)?

[@citationpro]

You read my mind! I have one in the works. Thanks for watching.

[@RayBrach]

Thank you!

[@citationpro]

I'm glad you liked it. I've been flying so much I haven't had time to put much together lately, but more is on the way.

[@robinraphaelriverapomales2184]

Thanks for the great videos. You also explain and simple to understand the systems; Excellent presentation... now I know what a professional is supposed to be Captain it will be possible that you can prepare some videos Citation 560XL will be very grateful Thank you very much in advance Robin Raphael Rivera-Pomales

[@tsramb23]

The aircraft was close to the coffin corner in this video?

[@citationpro]

Sort of but not really. A typical "coffin corner" would be when there is only a few knot margin between overspeeding and stalling. Even at FL450, the Citation has about a 30-50 knot margin, depending on weight and temperature. It is fairly forgiving compared to other jets.

[@tsramb23]

@@citationpro Thanks I have 4000 total time from mostly turboprops. I have never flown jets before and I just got hired for a job flying the Citation. Your videos are very useful, thank you!