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Mallard Down in Perth

Old 28th Jan 2017, 23:36
  #141 (permalink)  
 
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Should have never have taken off, text messages to another person seeking advice on the performance of the aircraft in the know conditions clearly indicates that the pilot was concerned. External factors potentially an influence on the decision to give it a go? High profile public event, can't tell me that the pilot may not have felt some pressure to do the display.
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Old 29th Jan 2017, 00:14
  #142 (permalink)  
 
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Can someone post the contents of the telegraph article, can't see it behind a pay wall.
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Old 29th Jan 2017, 00:56
  #143 (permalink)  
 
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Telegraph Grant Taylor, Rourke Walsh and Angela Pownall, News Corp Australia Network

“My biggest concern is how hot it is today and the lack of wind,” Mr Lynch said in the message.

“Perth gets very hot compared to back east I’ve noticed.”

Mr McCormack, who runs Red Baron Seaplanes, said Mr Lynch had also been battling with the Civil Aviation Safety Authority to allow him to fly in the Australia Day air show right up until the 11th hour.

The approval was finally granted on January 24 and a delighted Mr Lynch left a voice message on Mr McCormack’s phone that day saying: “Guess what mate, I got my type rating and everything through from CASA... and I am pretty happy about that as it means I will be in the show.”

Ms Cakrawati was also nervous about the flight and had originally intended to stay on the ground, before changing her mind at the last minute.

She told friends on social media earlier in the day that she was: “Super excited yet nervous. I can do it, wish me luck.”

Unable to copy texts which are a graphic, unfortunately.
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Old 29th Jan 2017, 00:57
  #144 (permalink)  
 
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Nobody has yet mentioned the optical illusion of the 'apparent slip' and the 'apparent skid' when turning from
(a) Upwind to downwind, and
(b) Downwind to upwind,
at LOW level.

Turning from downwind to upwind, for example, the aircraft is 'carried' by the wind in the sideways direction during the turn (Drift), in the direction of the wind, so the track made good (TMG) over the ground is elongated in the direction of the wind, downstream.

The illusion to the pilot looking out of the window at his intended landing area, is therefore that the aircraft is 'skidding' out of the turn, in relation to the ground.

The "obvious" 'cure' is to tighten the turn.... Not good.

The real 'cure' is to keep checking the Turn and Balance (Bat & Ball) and to keep that ball in the centre whilst continuing the balanced turn, at a given angle of bank.

If its still going 'pear shaped' into getting where you wanted to position the aircraft, then a 'go around' is the best cure and start again, taking the wind into full account next time.

The 'illusion' is the fatal flaw, ask any 'croppie'.

(Not intended to 'preach', but simply to explain to some here, the physics v the illusion v the 'various airspeed arguments'.
The airspeed (IAS) remains constant by the way, for a given rate of turn in a given wind, at a given altitude, gusts and wind shear / inertia excluded.....Groundspeed (GS) should never be confused with airspeed (IAS).

Last edited by Ex FSO GRIFFO; 29th Jan 2017 at 01:24.
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Old 29th Jan 2017, 01:27
  #145 (permalink)  
 
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It's difficult to believe the stand some take on turning with wind blowing, certainly not pilots, one would hope. Flying helicopters in the offshore world it was not uncommon to have 60 knots of wind when taking off from a platform. Climb speed in our particular aircraft was 75 knots and the turn to downwind while holding climb speed was visually spectacular if not seen previously. The point is, the aircraft doesn't care what the wind is, and if you are flying by reference to instruments you would have no idea what the strength of the wind is, or indeed, if there is any wind, save for the fact that you already have 60 knots airspeed prior to commencement of the take off.
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Old 29th Jan 2017, 01:46
  #146 (permalink)  
 
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Originally Posted by Lead Balloon View Post
So far as I am aware, the people who died in this tragedy haven't been buried yet. And the ATSB has yet to investigate the accident and produce a report.

Maybe a lesson for everyone to learn is: Take a deep breath. Then take another deep breath. Then wait.

Just my crap contribution...
this being a 'rumour' forum i interpret that as a clearance to speculate .
there are moderators who will remove posts when they deem it necessary so the self appointed policemen may stand down .
we all wait for official conclusions but in the meantime i want to hear others observations and opinions .
as an actual pilot with low level experience I chose not to post , until now , as I simply had nothing to add .
I did hear on the 9 news last night that the crash site water depth was only 1.5m .
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Old 29th Jan 2017, 01:59
  #147 (permalink)  
 
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Originally Posted by The name is Porter View Post
Can someone post the contents of the telegraph article, can't see it behind a pay wall.
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Old 29th Jan 2017, 02:47
  #148 (permalink)  
 
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Interesting to read the comments quoted by Mack McCormack in the post from the Daily Telegraph. He is the owner of the Grumman Albatross VH-NMO, that he had spent months trying to get through the red tape to operate in WA. He actually moved the aircraft to the eastern states on 22nd December 2016, after giving up trying to get approval.

Not sure if Mack is endorsed on seaplanes, but I used to go to work in the South China Sea on his aircraft when it operated out of Singapore back in the 1980s. It was flown by friend and legendary seaplane pilot
Bryan McCook(RIP). The Albatross is a bigger version of the Mallard.

I am a former helicopter pilot and used to always ride in the jump seat with Bryan, and even with his vast experience it was obvious that those aircraft are unforgiving, and in old parlance a "handful", especially on approach and water landing.

RIP to those lost, and I hope that some good comes out of this tragic event, that as with many accidents, it was the culmination of a series of small mistakes that should have been avoided.
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Old 29th Jan 2017, 03:02
  #149 (permalink)  
 
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Via laardvark:
...this being a 'rumour' forum i interpret that as a clearance to speculate .
there are moderators who will remove posts when they deem it necessary so the self appointed policemen may stand down .
we all wait for official conclusions but in the meantime i want to hear others observations and opinions .
as an actual pilot with low level experience I chose not to post , until now , as I simply had nothing to add .
I did hear on the 9 news last night that the crash site water depth was only 1.5m.
Crikey!.. 1.5m of water is a flight safety hazard. I've learnt sumthing from this thread.......

laardvark, insulting posters with the "self appointed policemen" comment don't help your case. There are some around here who just don't want to see crapola written about a fellow pilot who can no longer defend themselves.

...And I to am "an actual pilot with low level experience" ...or is that a low level of experience..






.
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Old 29th Jan 2017, 03:03
  #150 (permalink)  
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Griffo;
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Old 29th Jan 2017, 03:11
  #151 (permalink)  
 
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ok the policeman bit was too much . apologies .
i know experience is relative . my log says 8500 TT .
approx 4000hrs below 500' agl in light twins doing survey work .
you be the judge .
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Old 29th Jan 2017, 03:32
  #152 (permalink)  
 
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Mallard crash

Originally Posted by Pinky the pilot View Post
One question; Is anyone who has posted on this thread an Ag Pilot? Or has anyone a low level endorsement?

I'm almost tempted to say not!
I am a 14,000 hour Agpilot 4,000 hour float plane pilot , most of you guys scare me with your theories on flying. I hope none of you are instructors.
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Old 29th Jan 2017, 03:32
  #153 (permalink)  
 
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Shut it down mods.
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Old 29th Jan 2017, 03:55
  #154 (permalink)  
 
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I never understood the point of an anonymous pissing contest.
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Old 29th Jan 2017, 04:11
  #155 (permalink)  
 
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It was only a matter of time before the 'downwind turn' issue was 'raised'....
Yes it has an effect depending on gross weight, but the pilot's real problem was the crosswind drift elongating the base turn into the far side of the box and causing a right skid visual illusion** probably leading to a steeping bank angle/tighter turn. Turning into the sun at low level was a basic error as it reduced his visual inputs. Had he flown a right hand tear drop out of the sun with the wind reducing his base turn diameter then he might have made it. Those text messages don't imply any Plan B existed.
My previous questions - was his planning required / documented for the display organiser, was there or should there have been a display coordinator/pilot with a radio ready to pull the plug on anything that began to unravel, and just how far will ATSB go in recommending changes to the way CASA oversees air displays ?

No, don't shut it down and don't piss.

Last edited by The Wawa Zone; 29th Jan 2017 at 04:14. Reason: ** Just realised FSO Griffo got in first with the visual illusion !
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Old 29th Jan 2017, 04:15
  #156 (permalink)  
 
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There's no need to shut the thread down - it has been informative and educational.

If someone here wakes up to the issue of upwind and downwind turns (or whatever it was that they didn't understand prior) and it makes them a safer pilot, I amongst others will sleep more happily.
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Old 29th Jan 2017, 04:37
  #157 (permalink)  
 
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The thread should probably now be locked, it having run the usual Downunda course.

1. Pilot's judgment and skills criticised before he's been buried. Tick.

2. Cause of the accident diagnosed before the wreckage has been removed. Tick.

3. Calls for more regulatory intervention. Tick.

4. My logbook's thicker than your logbook competitions. Tick.

And you people wonder why you're the regulator's playing and governments couldn't care a toss about the health of the aviation sector.
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Old 29th Jan 2017, 05:06
  #158 (permalink)  
 
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Like I said in my earlier post, 16 seconds into the video he is already applying right aileron, and that's a fair time before the actual crash. So things are going awry quite early on in the turn?

The accident was in a very public place and I suspect that there is some much better footage of the lead up to the accident around and accessible to CASA for the inquiry. Until any of that comes to light in a public forum I don't see that there is much more to be gained here.

Steve
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Old 29th Jan 2017, 05:28
  #159 (permalink)  
 
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The last video posted above indicates to me that the pilot was likely the unfortunate victim of circumstance rather than poor technique. Although the lack of flaps in the final turn does appear to be at odds with recommended practice.

In that video the engines can be heard throttling down prior to the aircraft entering a very conservative left bank (maybe 10 degrees). Towards the middle of the turn, the bank angle is increased to maybe 15 to 20 degrees, and that's when the stall set in and the aircraft could not be recovered.

Hardly looks like a foolhardy manoeuvre to me, more likely a combination of temperatures and a possible wind shear or gust turning a manouevre the pilot had done many times before into an accident.
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Old 29th Jan 2017, 05:45
  #160 (permalink)  
 
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http://www.grummanmallard.com/Mallar...t%20Manual.pdf
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