willie.harrison(at)tinyon
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 Posted: Thu Jun 21, 2007 2:39 am Post subject: Flutter? |
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Thanks, Mike.
That was my guess - a year before we can read it.
At the moment, the PFA are taking a scattergun approach to checking anything they can think of which might contribute towards tailplane flutter (what else can they do in the circumstances?). In addition, the wording is still couched as "..may have been caused by flutter". Although I have no doubt that the eventual findings will be thoroughly researched, I expect others may share my impatience that the precise failure mode is not yet known with certainty: was it really initiated by tailplane flutter? if so, precisely which factor or combination of factors led to the flutter? What else could lead to the whole tailplane detaching?
As an aside, are there any aerodynamcists out there who can guide the rest of us about fluttering systems where there is backlash present? Is knowledge of these based on art, science or black art? Likewise, is there anyone out there who knows what flutter was ever experienced with the early prototypes, or indeed with later machines?
One other thing. I heard on the grapevine that the accident aircraft was returning from some pretty invasive maintenance when it crashed. Does anyone know what the maintenance was and therefore what parts of the airframe were "disturbed"?
Willie
On 19 Jun 2007, at 20:54, Mike Gregory wrote:
[quote]
Willie
Francis Donaldson, Chief Engineer of the PFA, told me last Friday that the AAIB were unlikely to publish anything soon, when I asked that specific question.
AAIB reports normally take many months. For example, the report on the crash of N8027U at Kemble on 25th March 2005 was published in early 2006.
The AAIB do, however, keep in close touch with the regulatory and airworthiness authorities and provide them with preliminary information as to the likely cause, especially where there is preventative action such as inspection, change of operating/handling instructions or potential modifications which may improve safety.
Regards
Mike
From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com (owner-europa-list-server(at)matronics.com)] On Behalf Of William HarrisonSent: 19 June 2007 18:59To: europa-list(at)matronics.com (europa-list(at)matronics.com)Subject: Re: Europa Incident - 180 turns
Brian and Mike (G)
Any idea when we can expect the full AAIB report on the UK accident?
Willie
On 19 Jun 2007, at 18:15, Brian Davies wrote:
Raimo,
When someone joins the Europa Club I send a CD of useful data that includes a number of AAIB and NTSB reports on Europa incidents and accidents plus a number of related incidents that have significance to our aircraft type e.g composite construction issues.
Brian Davies, Europa Club membership sec.
From: owner-europa-list-server(at)matronics.com (owner-europa-list-server(at)matronics.com) [mailto:owner-europa-list-server(at)matronics.com (owner-europa-list-server(at)matronics.com)] On Behalf Of Raimo ToivioSent: 19 June 2007 15:37To: europa-list(at)matronics.com (europa-list(at)matronics.com)Subject: Re: Europa Incident - 180 turns
When I practised Europa emergency landings
with standing prop my height was 1000 feet
from the ground when in downwind.
I keeped it clean until over landing place in final.
So I could be sure to reach estimated target.
Any lower and I would not feel comfortable.
Raimo; no Europa-experience much yet but building it fast
[quote]
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