Aircraft down Donkerhoek Area - Pretoria

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Aircraft down Donkerhoek Area - Pretoria

Unread post by Jabbanaught » Thu Feb 07, 2019 1:22 pm

Received these fotos , no details
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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by Multirotordronepilot » Thu Feb 07, 2019 1:26 pm

Glasair , looks like a well executed forced landing =D> =D> =D>
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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by Iceberg » Thu Feb 07, 2019 1:45 pm

Wheels still retracted - possibly on purpose?
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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by Wonko the Sane » Thu Feb 07, 2019 1:51 pm

Prop bent in first pic...Still had power(pure speculation from my side)?

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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by Multirotordronepilot » Thu Feb 07, 2019 1:57 pm

Iceberg wrote:
Thu Feb 07, 2019 1:45 pm
Wheels still retracted - possibly on purpose?
Absolutely, if forced down over that type of terrain gear up is always going to offer the best outcome. If not the debris trail will be a few meters longer than desired in most cases when airspeed is kept well alive.
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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by BD » Thu Feb 07, 2019 2:04 pm

Wonko ..... the prop appears to have bent backwards. Based on numerous discussions on Avcom in the past, the general consensus is that there was therefore no power to the prop on ground contact. If the prop had bent forwards, this would indicate that the engine had been developing power on contact.
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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by Wonko the Sane » Thu Feb 07, 2019 2:25 pm

BD wrote:
Thu Feb 07, 2019 2:04 pm
Wonko ..... the prop appears to have bent backwards. Based on numerous discussions on Avcom in the past, the general consensus is that there was therefore no power to the prop on ground contact. If the prop had bent forwards, this would indicate that the engine had been developing power on contact.
Thank you

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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by jimdavis » Thu Feb 07, 2019 3:42 pm

Multirotordronepilot wrote:
Thu Feb 07, 2019 1:57 pm
Iceberg wrote:
Thu Feb 07, 2019 1:45 pm
Wheels still retracted - possibly on purpose?
Absolutely, if forced down over that type of terrain gear up is always going to offer the best outcome. If not the debris trail will be a few meters longer than desired in most cases when airspeed is kept well alive.
MRDP, conventional wisdom says otherwise. There seem to be at least thee good reasons for putting the wheels down - regardless or terrain:

1. If the gear stays on then that's the best outcome.
2. If it breaks off, then that serves to help deceleration.
3. It keeps the fuel tanks off the ground for as long as possible - low wing aircraft.

At least that was the SAAF reasoning - and it makes sense to me.

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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by Chris71 » Thu Feb 07, 2019 3:52 pm

Looks like substantial damage to starboard side of fuselage and wing. Repairable?
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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by southside » Thu Feb 07, 2019 4:01 pm

I think keeping the gear retracted on uneven terrain is the best option. If the gear digs in, your chances of flipping over increase substantially with the possibilty of the roof crushing your head or breaking your neck.
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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by Sea Rescue » Thu Feb 07, 2019 5:50 pm

Hi Southside,

Ref the gear position in rough terrain - subject to aircraft size - but generally from what I have seen +1.
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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by southside » Thu Feb 07, 2019 6:20 pm

Hi Sea Rescue.

From your posts, you seem too have seen allot! So you and I are on the same page. It is my rule for any light aircraft.

Jim, your points are also very valid, I will however take my chances with gear up.

On a side note, does anyone know why most light aircraft only have one door to the cockpit? Realy gives the pilot the short end of the stick!

I have briefed countless pax on the use of the door, with them demonstrating it to me afterwards, but atleast 50% have trouble opening it after landing. In a panicked state, they will not stand a chance of getting out.
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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by Volo » Thu Feb 07, 2019 6:34 pm

I guess you will noticed this aircraft has two doors !!
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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by CWS » Thu Feb 07, 2019 6:39 pm

Looks like a perfect forced lob. Interesting don’t seem to have used flaps.
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Re: Aircraft down Donkerhoek Area - Pretoria

Unread post by Multirotordronepilot » Thu Feb 07, 2019 6:48 pm

I also see some kinking damage to the Stb side but can't tell how bad due to light shading, I suspect it looks worse that is and hope that's the case.

Lord Jim, yeah this will always have two sides which helps when you need to scrum off. I fully believe in the low drag option if forced to put down in terrain like that.
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