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david.corbett5(at)btinter
Guest

Posted: Fri Jun 13, 2008 9:27 am Post subject: For Andy

Hello, Raimo and everyone,



Following Raimo's report about his lightning strike, I forwarded his e-mail

to Andy Draper who now works in the engineering department of the UK Light

Aircraft Association (which was the PFA until 1 January 2008).



Here is Andy's reply:

Sent: 13 June 2008 11:00

To: David Corbett



Dear David,



Thank you for bringing my attention to Raimo's report.  I'm pleased to

learn that he, his passenger and aircraft landed safely.  We did prove

that the Europa can be fully controlled with the trim at either extreme

of travel and the CG at either limit so Jos's statement that the Europa

would become uncontrollable in pitch is incorrect.



The only other lightening strike in a Europa that I know about was to

Paul McAllister in the USA.  It may be out of date, but the e-mail

address that I have for him is paul.mcallister(at)qia.net.  Paul may have

some useful pointers as to what he found the airframe may have suffered.

I'm afriad that I have no experience in lightening strike damage.



One comment that I would make is that pilot's should be aware that

lighening can strike well away from the centres of CBs.  The overhanging

cloud should also be considered a no fly area.



The other place to seek advice from would be the BGA who are bound to

have experience in examining lightening damage to composite gliders.



Regards

Andy

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josok-e(at)ukolo.fi
Guest

Posted: Fri Jun 13, 2008 11:53 am Post subject: For Andy

Words change while being transferred, i have never stated "would become uncontrollable in pitch" What i told Raimo was that the force needed near one of the extremities is beyond what i can produce from a given point to a safe landing. I would appreciate the opinion of others who have run a full test program. They are all different, is it my plane only?



Regards



Jos Okhuijsen

Visit -  www.EuropaOwners.org

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raimo.toivio(at)rwm.fi
Guest

Posted: Mon Jun 16, 2008 12:04 pm Post subject: For Andy

"force needed near one of the extremities is beyond what i can produce"



sounds in my ears like "would become uncontrollable"    



My plane:



I need almost full trim to nose down position when cruising in or near max cruising speed.

During take offs and landings I trim to "neutral" postion.

That means I never use trim between neutral  and max nose upp position. 

My neutral is a real neutral ie. trim tabs and stabilators are levelled then.



Would like to know what happens if I trim max nose upp during 70 kts clean or dirty?

If no answers, I will test during my next flight some day.

Problem: I am afraid I am strong enough to broke the controls.



As well as Jos asked, opinions please!



Raimo



---

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ptag.dev(at)tiscali.co.uk
Guest

Posted: Mon Jun 16, 2008 2:21 pm Post subject: For Andy

Hi! Raimo.

I have some limited experience with the trim system "going out of

sync..." Since it was initially thought to be a wiring problem I endured

it for a while with discussions ensuing with the trim controller

company. 

The problem appeared to be that the system would not reverse until it

reached fully to the maximum limit. Initially I would hold the pitch

control and be brave enough to operate the trim motor to the maximum

deflection point and then it would reverse. I then really desperately

tried not to trim back for it to happen again. During all these test

circumstances I was most concerned for the strength of the trim system

and ultimately getting caught out trying to land in the failed mode.

Finally I used to let the aircraft fly with the maximum trim out

location hands off.. until the control was able to reverse. The Ray

Allen Company then got to do some serious reasoning about the problem

and asked me to return the motor and the control unit to them. They

tested out the motor and their relay deck and discovered a fault in the

relay deck and replaced it free of charge.  I've had no problems since.

Of course by not resisting the forces the control system was not

stressed however it would have been impossible to land.



Regards

Bob Harrison G-PTAG            



--

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