Max,
There is no English version of the Silent Hektic website. The
information I quoted came from data I downloaded, translated and
archived some time ago. I've just been back onto their site and see that
they have updated it with many new products (lots more RRs, a tempting
fuel injection conversion for the 912 and a completely new three-phase
generator set) but the snippet of information I quoted is now missing.
If you want a copy of my archived copy, let me know off-list and I'll
forward it.
Nigel
On 22/01/2014 13:00, Max Cointe (Free) wrote:
>
> Nigel,
>
> I wasn't able to find an English version of the S-H website, is there
> any and where your comments on Ducati's comes from?
>
> MaxCointe
>
> mcointe@free.fr <mailto:mcointe@free.fr>
>
> F-PMLH Europa XS_TriGear
>
> Kit #560-2003 912ULS/AirmasterAP332 490 hours
>
> F-PLDJ Dyn'Aro MCR 4S
>
> Kit #27-2002 912ULSFR/MTProp MTV7A 1600 heures
>
> *De :*owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] *De la part de*
> nigel_graham@m-tecque.co.uk
> *Envoy :* mercredi 22 janvier 2014 11:26
> * :* europa-list@matronics.com
> *Objet :* Re: Europa-List: Ducati rectifier/regulators ... a different
> perspective
>
> David, My feeling is that the Ducati RR is under-designed for its task
> and it is really a matter of where you site it under the cowl, that
> decides it's fate. By good planning or just good luck, yours seems to
> cool well and thus survives. If the Silent Hektik website is to be
> believed (see below), the Ducati RR is being over-driven.
>
> Nigel
>
>
> */The Ducati controller/*/
> //The original controller supplied by Ducati Energia is equipped with
> semiconductors , which allow a brief loading of 25A at 14V .
> Continuous loading of the semiconductor is limited under standard
> conditions at 25 C to around 17A. but since the alternator can
> deliver up to 20A, the original controller is overloaded even under
> optimal conditions. This results in frequent failures. /
>
>
> On 21/01/2014 22:15, David Joyce wrote:
>
> <davidjoyce@doctors.org.uk> <mailto:davidjoyce@doctors.org.uk>
>
> Tim, I absolutely accept that it is not ideal and could cause more
> serious problems than simple lack of charge, but one benign
> failure in 12 years of flying is pretty close to acceptable
> reliability for me, and I enjoy gliding anyway!
> Happy Landings, David
>
>
> houlihan <houlihan@blueyonder.co.uk>
> <mailto:houlihan@blueyonder.co.uk> wrote:
>
> Hi David.
>
> One thing to bear in mind is that there are, as I understand it,
> several
> modes of failure of the Ducatti unit the most benign being that it
> just
> stops charging the battery and feeding the services.
> This is as you describe and as I also suffered ( why does this
> happen mid
> channel?) but I believe it can fail and possibly allow high
> voltage DC or
> AC onto the bus giving your expensive radio and other clever stuff
> a real
> hard time !
>
> In the UK there is very little difference in cost between the
> Schicke and
> the Ducatti they are very similar in size and the wiring is only
> slightly
> changed , one wire not connected, and the generator fail light has to
> become an LED.
>
> Tim
>
>
> On 21 January 2014 19:13, David Joyce <davidjoyce@doctors.org.uk>
> <mailto:davidjoyce@doctors.org.uk> wrote:
>
>
> davidjoyce@doctors.org.uk <mailto:davidjoyce@doctors.org.uk>>
>
>
> Nigel, Fascinating and impressively erudite. You have totally
> convinced me
> that the way all new builders should go is with a Mofset bit of kit.
> However my personal solution is to take the odd Ducatti at sale
> price off
> anyone not planning to fit them and fly with a spare! In 1000hrs I
> have had
> one failure. That was inconveniently 1/3 way between Holland and
> Clacton,
> but there was enough juice in the battery to get me all the way
> home with a
> bit of thoughtful systems management. I currently fly with Rowland's
> spurned new Ducatti in my spares department under pax seat, but am
> prepared
> to offer a modest price for another unwanted Ducatti!
> Regards, David
>
> "nigel_graham@m-tecque.co.uk" <mailto:nigel_graham@m-tecque.co.uk>
> <nigel_graham@m-tecque.co.uk> <mailto:nigel_graham@m-tecque.co.uk>
> wrote:
>
>
> I have followed this discussion with great interest and with an
> increasing sense of Dj vu.
> When the issue of regulator/rectifier failures occur withing the
> Rotax
> community, the standard fix seems to be to simply replace like
> with like
> (at elevated Rotax pricing) and fly on until the next unit fails.
>
> Up until about five years ago, nearly all modern Japanese motorcycles
> used the same technology as that found on the Rotax 91x series
> engines,
> permanent-magnet generators controlled by SCR
> rectifier/regulators. It may
> come as some surprise that for an industry renowned for precision and
> reliability, nearly all of these major motorcycle manufactures
> have at some
> time, been plagued by problems with their SCR based
> rectifier/regulators
> failing and burning out alternators and wiring, cooking batteries
> and in
> extreme cases, squirting unregulated AC into the wiring loom and
> blowing up
> ECUs. It was just such a failure that "sparked" my interest :-(
>
> Known as "Shunt Regulators" the SCR technology runs extremely hot and
> requires more cooling air than modern styling and space allows.
> The solution was a move towards MOSFET controlled regulators and the
> numerous web-based one-make discussion groups were full of
> information and
> advice on the reasons for failure, the benefits of the change and
> practical
> advice on how to convert.
>
> It was by trawling these groups that I was able to build up a good
> understanding of how these R/Rs worked, what was causing the
> problem and
> what the potential solution might be. I compiled what I considered
> to be
> the best informed snippets of information into the attached document.
> The first half gives an overview of a typical design of an SCR
> Rectifier/Regulator for use on a permanent-magnet generating
> system and the
> second half discussed the relative merrits of SCR versus MOSFET.
>
> It would be interesting to know which technology the the after-market
> Schicker and Silent-Hektic R/Rs use.
>
> Nigel
>
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