Aces High Bulletin Board
General Forums => Aircraft and Vehicles => Topic started by: Lusche on August 01, 2008, 09:45:46 PM
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Ok, I'm quite used to fly the TA152, and I'm also quite used to the fact that thing can easily get into a nasty stall.
But this departure from controlled flight is the most amazing I ever had. I'm rarely surprised by anything in AH2 anymore, but this time I saw the ground coming closer with open mouth and staring baffled at my screen.
http://www.mediafire.com/?hkbaa7aeaas (30 seconds clip, 360kb only)
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Can you describe it? I don't have AH installed anymore. Did the departure have a quick accelerating roll to it that was far stronger than control authority, before settling into some odd angle?
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Hard to describe. I was indeed rolling with a Typhoon, but the angle wasn't od at all, not the usual "nose up -ooops- there we go". I was gentle on controls, nosed down, 250mph when I suddenly lost control.
The very moment I lose control: (nose down, 257mph to be exact)
(http://img505.imageshack.us/img505/9131/clip03qq4.jpg)
One second later. You can already see that my plane started to turn around its yaw axis.
(http://img390.imageshack.us/img390/487/clip05uj6.jpg)
Not easy to see anything on the pics, but quite bizarre when one sees the film
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It is very weird, almost acts like you lost your tail structure!
Prop wash isn't simulated in AH2 right?
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.......wow.......
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Yeah.. sounds familiar. I think I have about 3-4 films of that one.. What can you do? :)
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Yeah.. sounds familiar. I think I have about 3-4 films of that one.. What can you do? :)
Well.. I was more hoping for someone convincingly open my eyes about what exactly I did wrong and why it's completely in line with the physics of flight :D
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Hmm...
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Hello – I seldom, ... alright, virtually never post here, b u t ………...
…….. Since I’ve been trying to understand a similar incident, this post has provided an opportunity to test a theory, so thank you.
Both planes blissfully chug along without a care in the world, both appallingly both plummet.
Why? . . . I don’t know this is just an analysis.
The original films:
1. TA152 Stall: http://www.mediafire.com/?hkbaa7aeaas
2. Spit V Stall: http://71.18.103.129/Up_Over_Down_Out.ahf
A possible common factor
** Watch the beacon in these outtakes ** Just before the stall they flash yellow.
1. TA152: http://71.18.103.129/downloads/TheStall152.ahf
2. Spit V : http://71.18.103.129/downloads/TheStallSpitV.ahf
The yellow does not usually appear in the longer films, unless you’re lucky, I only saw it once.
Is this the answer or an unlucky coincidence?
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moot isnt that the same stall that happend to me when we were dueling a while back? it feels like this: You feel a sudden but subtle rudder movement that you did not input, then the plane begins to cartwheel uncontralably on its axis... Its that wierd rudder stall thing...
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I'm at noob level in those things, but they quite often feel like their arse end is too heavy...the way most planes feel when your tail section is shot away
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I'm at noob level in those things, but they quite often feel like their arse end is too heavy...the way most planes feel when your tail section is shot away
Yup, and that's what's usually getting you into a stall if you are not pretty careful. In such a situation I'm not really caught by surprise for more then a second before realizing I just pushed her over the edge. But this time I think was't even close to riding any edge at all...
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Freez, yep.. I just haven't figured out exactly what it is that starts it.
Badduck, the beacon in films will always turn on, try any other film.
Grats on the promotion Lusche.
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The TA has alot of mass in those wings, so throwing in alot of rudder imputs makes it squirely, emagine it is like a flying wing with just a nub of a tail, and coincidentaly, fly it as such.
Sorry bout the spelling, geeeez :O
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Yep...looks like you lost your horizontal air control. It was as if the elevators created a vacuum and your dorsal fin had nothing to "bite" and caused your tail to rotate.
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I could not reproduce it on my system. Is your rudder system spiking?
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It's not Lusche's controls. The plane will do that in a heartbeat, if you're in the right conditions.
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I tried three full tank fulls and cant reproduce it. I wish the film viewer showed fuel loads and all. I also could not see rudder positions in the film. I guess controls dont show either!
Before you ask I never use stall limiter! :eek:
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Well silly goose... You dove on a Typhie! Everyone knows that the game only allows Typhies to dive from above, nobody is EVER allowed to dive on a Typhie!
I'm amazed that the reality itself wasn't completely shredded! :eek:
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Lusche:
It appears to me that you entered into an accelerated stall while experiencing adverse yaw to the right. The adverse yaw to the right occurs when you are rolling to the left caused by greater induced drag for the wing that has the greater lift to initiate the rolling moment (in your case the right wing to roll left). Planes with high aspect ratios (like the Ta-152) experience greater adverse yaw which is a well known stability issue for aero's designing them these days.
At about the 18 sec mark I'm guessing is when you exceeded critical aoa looking at the angle that the trail makes in relationship with the wing. There was a sudden increase in trail angle relative to the wing chord. The aircraft was already under adverse yaw from the left hand rolling you were doing. Yawing moment from the adverse yaw continued to yaw your nose to the right after you stalled which eventually put your aircraft into a very awkward orientation which eventually (& quickly) led into a deep stall (relative airflow at very high angles of attack - as indicated by the trail path to wing chord - near 90 degrees).
Couldn't tell by the controls if any rudder input contributed to it all or not.
Hope that helps!
Tango,XO
412th FS Braunco Mustangs
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That makes a lot of sense Tango.:aok I've felt the same adverse yaw in the 152, but I can't fly it on the edge like these guys can. Guessing the 152 needed an even bigger vertical stab.
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It did need it and it was otw to implementation.. Unfortunately for us Germany was attrited to bits.
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Finally got this to happen. Why dont more dweebs fly this so their 'aileron escape' ends their foolishness?
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Because it's a crappy deathtrap.
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So I just read in another thread that AH2 in fact does model prop-wash. Could this also be an instance where airflow over the rudder was interrupted enough that it caused a stall? The combination of the roll effects dtango was speaking off, and the fact that it looks to me that he pulls right in behind the Typhie when the stall occurs... Am I way off base here?
For reference:
http://bbs.hitechcreations.com/smf/index.php/topic,243380.msg2969338.html#msg2969338
EDIT: Just looked again from the exterior view, doesn't look like his prop was would be an issue when looked at from this angle...
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So I just read in another thread that AH2 in fact does model prop-wash. Could this also be an instance where airflow over the rudder was interrupted enough that it caused a stall? The combination of the roll effects dtango was speaking off, and the fact that it looks to me that he pulls right in behind the Typhie when the stall occurs... Am I way off base here?
Not in this specific case because Lusche had chopped his throttle and kept it idle before the critical moments. He only pushed his throttle back up slightly at the very end after he got into a deep stall.
Tango, XO
412th FS Braunco Mustangs
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I realize that this is dragging an old thread back up, but the same sort of experience happens to me when I am trying to keep up with the Spit I zooming along under me in a 110-C in offline. When the stall hits, I drop some flaps, and I am able to have some vert control, so I nose my plane a bit down to get some air flow, and hit wep to pull out of it. Usually this happens when I have some alt, but the severity of the stall often varies. I don't know if this will help you, but I hope I made some sense.
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It's really a very very different situation, between the 110s' and the 152's stall behaviors.
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Stalled the horizontal stablizer??? :salute