Why did this helicopter crash ?

Sean,
SORRY IF I CAUSED YOU TO MISUNDERSTAND MY EXPALNATION. I MEANT THE
PILOT OBVIOUSLY LOWERED COLLECTIVE TO FULL DOWN TO STOP THE YAW FROM
TAIL ROTOR FAILURE. NOT FULL AUTO. HE MAY HAVE ACTUALLY ROLLED OFF
THROTTLE TO SPLIT NEEDLES THOUGH I DOUBT IT. HE PROBABLY JUST WENT
FULL DOWN UNTIL NEAR THE ROOFTOPS WHERE HE HAD TO FLAIR AND PULL IN
SOME COLLECTIVE. THAT'S WHEN HE GOT THE BAD YAW DUE TO THE FACT HE WAS
ADDING POWER WITHOUT ANY TAIL ROTOR THRUST.

Sean Trost wrote in message ...
ummn Andy,
Correct me if I'm wronge but if the helicopter is in an auto then the
rotor is disengaged from the powere source, hence no tourqe to induce
the yaw when the collective is pulled.
all the best
Sean

helicopterandy wrote:
"Ove" wrote in message ...

Maybe a hydraulic failure (lost the pressure) ?

Ove
"Iwan Bogels" wrote in message
...

Hi everybody,

This week I have uploaded a video of a helicopter crash on my website
(www.dappa.nl/crash.htm). Does anyone have a clue about the failure that
caused this crash? It is definately not an engine failure or a tail rotor
failure, but it still looks like a spectacular decend.

For the sensitive viewers: Nobody got hurt, but the helo is a complete

write

off.

Iwan Bogels
DAPPA




Sorry for the multiple posts here. But on my first reply I meant to
say after he began the auto he had to pull collective when he neared
the buildings rooftops and he obviously didn't have any tail rotor
thrust to manage that collective pull. Notice how the heli yaws when
he arrests his descent. Read the initial NTSB reports.

I believe preliminary findings are leaning toward inadvertent isolation of
the hydraulics, followed by sudden loss of procedural knowledge, shortly
followed by total amnesia of the event... or something close to that. Go
read the NTSB report.

"Ove" wrote in message
news
Maybe a hydraulic failure (lost the pressure) ?

Ove
"Iwan Bogels" wrote in message
...
Hi everybody,

This week I have uploaded a video of a helicopter crash on my website
(www.dappa.nl/crash.htm). Does anyone have a clue about the failure that
caused this crash? It is definately not an engine failure or a tail
rotor
failure, but it still looks like a spectacular decend.

For the sensitive viewers: Nobody got hurt, but the helo is a complete
write
off.

Iwan Bogels
DAPPA

"Jim" wrote in message
k.net...
... sudden loss of procedural knowledge

= panic

No idea, but my Raptor keeps doing things like that.

"Iwan Bogels" wrote in message
...
Hi everybody,

This week I have uploaded a video of a helicopter crash on my website
(www.dappa.nl/crash.htm). Does anyone have a clue about the failure that
caused this crash? It is definately not an engine failure or a tail rotor
failure, but it still looks like a spectacular decend.

For the sensitive viewers: Nobody got hurt, but the helo is a complete
write
off.

Iwan Bogels
DAPPA

"Iwan Bogels" wrote in message ...
Hi everybody,

This week I have uploaded a video of a helicopter crash on my website
(www.dappa.nl/crash.htm). Does anyone have a clue about the failure that
caused this crash? It is definately not an engine failure or a tail rotor
failure, but it still looks like a spectacular decend.

For the sensitive viewers: Nobody got hurt, but the helo is a complete write
off.

Iwan Bogels
DAPPA

Tail rotor failure.
http://www.ntsb.gov/ntsb/brief.asp?e...12X00594&key=1
--
Gene Seibel
Hangar 131 - http://pad39a.com/gene/plane.html
Because I fly, I envy no one.

"Iwan Bogels" wrote in message ...
Hi everybody,

This week I have uploaded a video of a helicopter crash on my website
(www.dappa.nl/crash.htm). Does anyone have a clue about the failure that
caused this crash? It is definately not an engine failure or a tail rotor
failure, but it still looks like a spectacular decend.

For the sensitive viewers: Nobody got hurt, but the helo is a complete write
off.

Iwan Bogels
DAPPA

Iwan
Of course it's futile to 2nd guess the cause of this accident but its
obviously a mechanical malfunction and my guess its a hydraulic
failure. At first glance it appeared to be tail rotor failure but
given the gyrations, it is more than that. So, my best guess or WAG
(wild ass guess) is a near complete hydraulic failure with resultant
crazy control responses.
I must emphasize I only have 8000 hours in helicopters (13-14,000 in
fixed wing) and very little in the AStar so its only my best guess.
Ol Shy & Bashful
p.s. I'd like to see more on your website but as you know, its down? I
am a proponent on what you are doing for instructional purposes and
accident prevention. If you have another way to access your clips
please let me know?

Dear,

Thanks for your educated guess. I'm impressed with your flight hours ! I
don't even have that many hours in my car.... :-)

Right now I have more than 100 videos of aviation mishaps, accidents and
crashes, and that number is still growing since I have uploaded the website.
As far as I can check the video is still available at
www.dappa.nl/crash.htm. Please check again and let me know when you (or any
others) still have problems viewing the footage via the website. More videos
will follow soon.

Best regards,
Iwan Bogels





"SelwayKid" schreef in bericht
om...
"Iwan Bogels" wrote in message
...
Hi everybody,

This week I have uploaded a video of a helicopter crash on my website
(www.dappa.nl/crash.htm). Does anyone have a clue about the failure that
caused this crash? It is definately not an engine failure or a tail
rotor
failure, but it still looks like a spectacular decend.

For the sensitive viewers: Nobody got hurt, but the helo is a complete
write
off.

Iwan Bogels
DAPPA

Iwan
Of course it's futile to 2nd guess the cause of this accident but its
obviously a mechanical malfunction and my guess its a hydraulic
failure. At first glance it appeared to be tail rotor failure but
given the gyrations, it is more than that. So, my best guess or WAG
(wild ass guess) is a near complete hydraulic failure with resultant
crazy control responses.
I must emphasize I only have 8000 hours in helicopters (13-14,000 in
fixed wing) and very little in the AStar so its only my best guess.
Ol Shy & Bashful
p.s. I'd like to see more on your website but as you know, its down? I
am a proponent on what you are doing for instructional purposes and
accident prevention. If you have another way to access your clips
please let me know?

OK...let's play CLUE:

AEROSPATIALE helicopter...

COLLECTIVE PULL...

L E F T yaw...

STILL GUESSIN'?

"Iwan Bogels" wrote in message ...
Hi everybody,

This week I have uploaded a video of a helicopter crash on my website
(www.dappa.nl/crash.htm). Does anyone have a clue about the failure that
caused this crash? It is definately not an engine failure or a tail rotor
failure, but it still looks like a spectacular decend.

For the sensitive viewers: Nobody got hurt, but the helo is a complete write
off.

Iwan Bogels
DAPPA

The NTSB hasn't finished it's report but you can find some preliminary
information he
http://www.ntsb.gov/ntsb/brief.asp?e...12X00594&key=1

There is also some different information here, but I would consider it
suspect due to the source...
http://www.wnbc.com/news/3269249/detail.html

-lance smith

Yes. He was trying to hit some dumb asshole like you and missed.
But he'll get ya next time!

Tony

,
"Iwan Bogels" wrote:

Hi everybody,

This week I have uploaded a video of a helicopter crash on my website
(www.dappa.nl/crash.htm). Does anyone have a clue about the failure that
caused this crash? It is definately not an engine failure or a tail rotor
failure, but it still looks like a spectacular decend.

For the sensitive viewers: Nobody got hurt, but the helo is a complete write
off.

Iwan Bogels
DAPPA




--

Tony Roberts
PP-ASEL
VFR OTT
Night
Cessna 172H C-GICE