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#1
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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
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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
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Looking for pictures of motorglider failures
Thanks Eric - Can you forward this on to ASA and provide some photos?
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#4
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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 |
#5
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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? |
#6
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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... |
#7
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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.Â* 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 |
#8
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Looking for pictures of motorglider failures
On 12/8/19 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... Page 23 on http://www.doc.glidingaustralia.org/...ies&Itemid=101 this is probably the same incident I remembered, but that version had the farmer making two trips to deliver spare parts. |
#9
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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? |
#10
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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.
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