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Looking for pictures of motorglider failures



 
 
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  #1  
Old December 7th 19, 06:27 PM posted to rec.aviation.soaring
Dave Nadler
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Posts: 1,610
Default Looking for pictures of motorglider failures

I've been persuaded to give an OSTIV talk about motorglider safety issues,
in particular propulsion system failures. I'm going to discuss
common failures, the systemic reasons this stuff has happened and
WILL CONTINUE to happen, and some ideas for systemic improvements.

I'm looking for pictures and/or documentation of failures, for example:
- failed position switches (ie limit switches, prop position sensor)
- failed fuel systems (improper hoses, routing, leak sources, etc)
- failed structural components (cracked exhaust, mounts, pylons, etc)
- failed drive belts
- failed electrical connectors
- failed motor controller
- failed electronics
and anything else you might happen to have.

Ideally a good photo, make and model, approximate date, brief description.
Please email to me offline.

Thanks in advance for the help!
Best Regards, Dave

PS: Probably time to redo this study, but situation isn't that much changed:
http://www.nadler.com/public/DeRese_...ilplanes.p df
  #2  
Old December 7th 19, 08:29 PM posted to rec.aviation.soaring
Eric Greenwell[_4_]
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Posts: 1,939
Default Looking for pictures of motorglider failures

Dave Nadler wrote on 12/7/2019 9:27 AM:
I've been persuaded to give an OSTIV talk about motorglider safety issues,
in particular propulsion system failures. I'm going to discuss
common failures, the systemic reasons this stuff has happened and
WILL CONTINUE to happen, and some ideas for systemic improvements.

I'm looking for pictures and/or documentation of failures, for example:
- failed position switches (ie limit switches, prop position sensor)
- failed fuel systems (improper hoses, routing, leak sources, etc)
- failed structural components (cracked exhaust, mounts, pylons, etc)
- failed drive belts
- failed electrical connectors
- failed motor controller
- failed electronics
and anything else you might happen to have.

Ideally a good photo, make and model, approximate date, brief description.
Please email to me offline.

Thanks in advance for the help!
Best Regards, Dave

PS: Probably time to redo this study, but situation isn't that much changed:
http://www.nadler.com/public/DeRese_...ilplanes.p df


Things have changed, big time: used to be only gasoline engines, now we have
electric motors, so add to the list:

- failed propulsion motor
- failed motor batteries
- failed motor battery chargers
- failed cooling fans


--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1
  #3  
Old December 7th 19, 10:39 PM posted to rec.aviation.soaring
Dave Nadler
external usenet poster
 
Posts: 1,610
Default Looking for pictures of motorglider failures

Thanks Eric - Can you forward this on to ASA and provide some photos?
  #4  
Old December 8th 19, 02:57 AM posted to rec.aviation.soaring
son_of_flubber
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Posts: 1,550
Default Looking for pictures of motorglider failures


http://www.nadler.com/public/DeRese_...ilplanes.p df


Lacking experience sustainer, I need some help interpreting Section 2.2.1 'Usage frequency'.

Is the report saying that pilots use the sustainer to avoid outlandings on 69-70% of flights?

Does anyone have links to previous discussions of this report in English?
  #5  
Old December 8th 19, 03:50 AM posted to rec.aviation.soaring
Darryl Ramm
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Posts: 2,403
Default Looking for pictures of motorglider failures

Failed pilots? Dave, you don’t want me to send you my photo?

  #6  
Old December 8th 19, 01:02 PM posted to rec.aviation.soaring
[email protected]
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Posts: 3
Default Looking for pictures of motorglider failures

Later on it explains that most of these are “test runs” early in the flight while local to the home airfield. I suspect this practice is more common in Europe than in the states, although I haven’t flown around sustainer sailplanes enough to know for sure.
  #7  
Old December 8th 19, 03:46 PM posted to rec.aviation.soaring
Eric Greenwell[_4_]
external usenet poster
 
Posts: 1,939
Default Looking for pictures of motorglider failures

Dave Nadler wrote on 12/7/2019 1:39 PM:
Thanks Eric - Can you forward this on to ASA and provide some photos?

Yes, I'll ask the members to help out.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1
  #8  
Old December 8th 19, 05:46 PM posted to rec.aviation.soaring
kinsell
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Posts: 546
Default Looking for pictures of motorglider failures

No one has mentioned jets? They can be unreliable to get started, and
there's been uncontained blade failures. Even had the engine depart the
A/C.



On 12/7/19 2:39 PM, Dave Nadler wrote:
Thanks Eric - Can you forward this on to ASA and provide some photos?


  #9  
Old December 8th 19, 05:59 PM posted to rec.aviation.soaring
Dave Nadler
external usenet poster
 
Posts: 1,610
Default Looking for pictures of motorglider failures

On Sunday, December 8, 2019 at 11:46:36 AM UTC-5, kinsell wrote:
No one has mentioned jets? They can be unreliable to get started, and
there's been uncontained blade failures. Even had the engine depart the
A/C.


Interesting, I've heard of numerous failures to start and failure to climb,
but not uncontained blade failures or engine departing AC...
  #10  
Old December 8th 19, 06:38 PM posted to rec.aviation.soaring
Dan Marotta
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Posts: 4,601
Default Looking for pictures of motorglider failures

HERE https://www.youtube.com/watch?v=Puia_yQxir8&feature=youtu.be is
an example of a jet sustainer failure to start.* Good glide path
control, but I thought he may have waited a bit longer than required
before dumping his ballast.

On 12/8/2019 9:59 AM, Dave Nadler wrote:
On Sunday, December 8, 2019 at 11:46:36 AM UTC-5, kinsell wrote:
No one has mentioned jets? They can be unreliable to get started, and
there's been uncontained blade failures. Even had the engine depart the
A/C.

Interesting, I've heard of numerous failures to start and failure to climb,
but not uncontained blade failures or engine departing AC...


--
Dan, 5J

 




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