The dynon AP panel that I have (I am still trying to figure out how to use
the advanced AP functions) is connected to the trim because it has an auto
trim function. The AP panel cuts off the trim power after about 3-4
seconds of continuous use. You have to press the switch again if you want
to continue moving the trim tab.
William Daniell
LONGPORT
+57 310 295 0744
On Tue, Apr 9, 2019 at 9:01 AM Brian Davies <brian.davies@clara.co.uk>
wrote:
> brian.davies@clara.co.uk>
>
> Bob,
>
> Although Europa recommend the Trim power supply comes directly off the
> battery their circuit diagram clearly shows an isolating switch in the
> circuit. Personally I would regard this as a mandatory requirement to cover
> the trim runaway situation. It can be provided by a pull to break circuit
> breaker, again as stated in the build manual.
>
> Regards
>
> Brian
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com [mailto:
> owner-europa-list-server@matronics.com] On Behalf Of Bob Harrison
> Sent: 09 April 2019 12:34
> To: europa-list@matronics.com
> Subject: RE: Europa-List: Anyone experienced trim runaway?
>
>
> Hi! Kingsley.
>
> Fine to add a switch if it isolated the trim circuit except the original
> Europa electrical circuit stipulation was for it to be wired direct to
> power supply and by pass the isolating switch for the remaining circuit.
> My experience involved the Ray Allen relay decks and it was them who
> discovered the fault in the original relay deck, so resulting in the update
> to the Mark II type
> The loads developed on the control with maximum trim position is
> phenomenal and would be impossible to land the aircraft with one control
> stick . the resulting loads on the controls linkages are frightening .
> Regards
> Bob Harrison G-PTAG
>
>
> Original Message-----
> From: owner-europa-list-server@matronics.com [mailto:
> owner-europa-list-server@matronics.com] On Behalf Of Kingsley Hurst
> Sent: 09 April 2019 10:52
> To: europa-list@matronics.com
> Subject: Re: Europa-List: Anyone experienced trim runaway?
>
> kingsnjan@westnet.com.au>
>
> A few years ago, just after take-off from an airport a long way from
> home, I experienced a trim runaway as I was trimming forward. I can
> assure you it quickly got my attention as the control force was
> uncomfortably heavy. After toggling the trim switch quickly in both
> directions, normal trim function thankfully resumed.
>
> The aircraft has trim switches on both sticks and has a relay in the
> circuit. It was the relay that stuck and after replacing it with the
> later heavier duty relay supplied by Ray Allen, no further problems were
> experienced.
>
> This incident dictated I put a trim on/off switch next to the trim
> indicator on the panel.
>
> Cheers
> Kingsley in Oz
>
>
> ---
> This email has been checked for viruses by AVG.
> https://www.avg.com
>
>
|