Thanks Jim,
So much for the seat belts and attachment points I guess.
Derek, it may have been a case of target fixation on the test point
and the glider was in the unusual attitude when he realised and
elected to go inverted. At that point he should have pushed, waited
for the speed to decrease and rolled upright. However during my last
AFR we did some unusual attitude recoveries. Actually pretty mild
ones and only visual, not on instruments. I didn't have any problem
with using zero or negative G when required. My instructor remarked
that he's found this to be unusual in that the vast majority will
simply pull the stick back all the way.
FWIW.
Another lesson might be that a BRS has limits if deployed outside the
envelope and a personal parachute is still a good idea. My local
parachute guy thinks we may be better off with a small BRS designed
just to give the pilot more time to bail out. This would also be
easier to install in the glider.
Mike
At 07:26 AM 4/20/2016, you wrote:
Content-Type: multipart/alternative;
boundary="----=_NextPart_000_005E_01D19AD5.EC6998F0"
Content-Language: en-au
So apparently, despite having over 2000 hours in gliders, the pilot
did not recognise a spiral dive. His hamfisted attempt to recover
from the same, by rolling the glider inverted and pulling back on
the stick pulled the wings off, Surprise surprise.
I shudder to think of clowns like these flying drones around.
Event 19 called for a 2/3 left aileron deflection "up" at 80 knots
indicated airspeed. During performing event number 19, the pilot
attempted to roll the aircraft left and maintain a 2/3 aileron
deflection. As the pilot rolled to the left, the glider began to
nose down and rapidly increase in airspeed. The pilot elected to
continue to roll the airplane until it the wings were level in the
inverted position. As the airplane levelled out, the indicated
airspeed reached 105 knots. The pilot then began increasing the back
pressure on the yoke in order to recover to straight and level flight.
From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au]
On Behalf Of Jim Staniforth
Sent: Wednesday, 20 April 2016 2:25 AM
To: Discussion of issues relating to Soaring in Australia.
Subject: [Aus-soaring] Windward Owl NTSB report
Mike:
Sorry it took so long, was away.
More difficult to find as it was actually a derivative of the
Sparrowhawk called the Owl (apparently the L is an extra letter)
which was built specially for the Raspet Flight Research Lab.
Believe a lot was learned about deceleration using BRS. The pilot
was still strapped into the seat pan when he was "ejected".
NTSB Identification: DFW07LA006
<http://www.ntsb.gov/_layouts/ntsb.aviation/Results.aspx?queryId=c352df46-c30d-4d70-8bdc-0c29c1033007>http://www.ntsb.gov/_layouts/ntsb.aviation/Results.aspx?queryId=c352df46-c30d-4d70-8bdc-0c29c1033007
Post flight analysis of the data indicated that during the
nose down attitude, the wings separated from the airframe at
approximately 162 knots. The flight
engineer stated that the glider was equipped with an airspeed
indicator that indicated a maximum
airspeed of 105 knots. The stop-point for the airspeed indicator was
just beyond the maximum
indicated airspeed. The pilot was unaware that the "never exceed"
speed of 123 knots had been
breached during the descent.
Jim
On 4/18/2016 3:38 PM, Mike Borgelt wrote:
Jim,
When was the incident below and what were they trying to do. Any links to it?
Please remember that the Raspett team took a Sparrowhawk over
redline because they installed an ASI with a stop at the redline.
Broke the wings off. BRS deployment ripped the pilot in the seat pan
out of the glider. Pilot used a conventional chute.
Mike
Borgelt Instruments - design & manufacture of quality soaring
instrumentation since 1978
<http://www.borgeltinstruments.com/>www.borgeltinstruments.com
tel: 07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 : int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia
_______________________________________________
Aus-soaring mailing list
<mailto:Aus-soaring@lists.base64.com.au>Aus-soaring@lists.base64.com.au
http://lists.base64.com.au/listinfo/aus-soaring
_______________________________________________
Aus-soaring mailing list
Aus-soaring@lists.base64.com.au
http://lists.base64.com.au/listinfo/aus-soaring
Borgelt Instruments - design & manufacture of quality soaring
instrumentation since 1978
www.borgeltinstruments.com
tel: 07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 : int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia
_______________________________________________
Aus-soaring mailing list
Aus-soaring@lists.base64.com.au
http://lists.base64.com.au/listinfo/aus-soaring
