Peter Ha
Pre-takeoff checklist
- Joined
- Nov 18, 2019
- Messages
- 226
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Leadpan
By the video, it looks like the CAPS was deployed too late.
Looking at flightaware, it seems it was a base to final turn after a previous go around:
I wonder how effective the envelope protection system on the newer Cirrus would be at helping to prevent something like this
10,000+ fpm..?So the last frame of the flight aware data in the video, the ground speed is 89, which should be good, unless he was no flaps, and his descent rate was 10,000+ fpm, which is about 90 knots.
I wonder how effective the envelope protection system on the newer Cirrus would be at helping to prevent something like this
I thought that won’t kick in below 200 AGL, not sure at what alt this happened. RIP
This is true, under 200 AGL the system is inhibited.. however it appears that this aircraft's chain of events started before that 200 AGLI thought that won’t kick in below 200 AGL, not sure at what alt this happened. RIP
I understand the sentiment regarding aircraft used for training. My personal opinion has varied over the years. Now if asked what’s the best trainer my answer is pretty much whatever you want. Just remember they all can kill you if flown improperly or without respect and make sure the instructor is appropriately experienced if it’s not a vanilla trainer normally found in the training environment.Very sad. My personal belief is that student pilots should stick with trainers that have low stall speeds. The 20 stalls at about 56 knots dirty ( maybe a little less I don't have a poh in front of me). The pattern is flown at 100 knots, abeam downwind, 90 on base, and 80 to 85 on final. That's pretty fast compared to a 172 or a 150. I know pilots have gotten their ppl in 20s and 22s, but it just seems more difficult for the student and less likely for an instructor to let things get out of line as much as he would in a trainer as a lesson learning tool. YMMV
Speed management is critical in the SR, and like any airplane there are situations where it can bleed off quickly if you are not on top of it. He had a ground speed of about 90 knots into the base turn. That would be ok for an indicated airspeed, but I'm willing to bet he had at least a 10 knot tail wind at that point. I'm thinking he just got too slow and lost it. It looks like he was a picture taker too. Which I suppose is ok with an instructor, but I think instructors should ban picture taking while PIC solo for students. Although I doubt that was an issue here I think it's still too big of a distraction for a student pilot. Plenty of time for that after you get your license.
Sad story.
You know, that's a good thought, you are probably correct. But this guy was on his base maybe turning to final, so he should have been at least 500 ft agl.
Yah then the ESP should have kicked in, but in most places I have heard it’s not going to save your bacon in these base to final stall-spin. I am going to run some scenarios up at altitude and see how and when ESP actually engages.
More info at Kathryn's Report: http://www.kathrynsreport.com/2020/05/cirrus-sr20-n883pj-fatal-accident.html
I went to look up the esp specs and my ipad died. But esp should definitely help in the pattern at base to final, I wouldn't test it there though. I'll get my Ipad going again and see what they say.
I researched ESP quite a bit and in theory it should work, it will lower the nose and reduce bank angle, but it’s dependent on airspeed not AOA, so I could see where it might kick in but still not help with the impending stall, especially if someone is making a very tight turn, not coordinated and one wing has stalled.
Ok, I looked it up, and you are right, it's inhibited below 200 agl. But above that it should work. What it will do is give you an aural airspeed warning and give you tactile feed back if your bank approaches 45 degrees, progressively pushing you back to a lesser bank. Beyond that it also uses the stall warning system, so if the stall warning system indicates a stall, it will apply pressure to unstall the airplane. But, of course, there are limits to what it can do and you can over power it. So if you are hell bent on banking 45+ degrees in a skidding turn at 80 knots and you do it fast, you are probably going to end up inverted headed toward the ground and nothing will help you.
I don’t understand what is the problem with banking 45 degrees base to final or otherwise .... as long as you keep wings unloaded , 45 degree banks are certainly safer than trying to avoid them with skidding..