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nicknorman

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nicknorman last won the day on January 23

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  • Gender
    Male
  • Location
    Aberdeen
  • Interests
    Electronics, gliding, motorbikes

Previous Fields

  • Occupation
    helicopter pilot - retired
  • Boat Name
    Telemachus
  • Boat Location
    Fazeley Mill Marina, Tamworth

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  1. No, certainly not at light loads. The hum is typically caused by slight loose windings or core in a transformer. Probably not any sign of impending failure but none the less annoying.
  2. Close. We have an “all lights on” button at the helm which turns on the cabin lights and welldeck under gunnel lights. It doesn’t open the front door but then we have glass windows in the front door!
  3. Mike Todd, good post (because I like rational discussion, not because I agree with it!) second para: someone may set out to be offensive but they only succeed if the recipient lets them. Third para yes it can be difficult to switch from habitual behaviour/responses. One thing we learnt during piloty human factors training was that behaviour is the choice of the person. You can choose to behave well, or not. Despite what difficulties may be going on in your head. eg you are in a bad mood because crashed the car(boat)/spouse left you/relative ill etc, but it is your choice as to how those underlying problems reflect in your behaviour. The archetypal worst behaviour is of course the passive-aggressive where you are pissed off, you want everyone to know it, but you don’t explain why. If we say that behaviour is NOT the choice of the person, we open the door to any old bad behaviour without responsibility, on the grounds that something bad happened so I’m entitled to behave badly towards others. That cannot work! Yes certainly moving away from learnt behaviours and responses can be difficult, but ultimately is within our control and therefore is our choice. Fifth para yes I agree with much of it. You are sort of saying that the vociferous ones determining that a particular word is “offensive” and forcing (by means of virtue signalling) everyone to use the new word, is ultimately ineffective. I would absolutely agree with that and is a good chunk of my point. The rest, we are up against our biology & genetics where for thousands of years it was necessary to distrust and fight strangers / anyone a bit different, and to only respect and protect our own family / tribe. It is a difficult thing to get over and different languages and religions are most unhelpful in this respect, but we need to plod on. What doesn’t help is vociferous / woke people trying to force us into the latest PC things by means of virtue signalling and other tactics designed to show their moral righteousness. It becomes a self-perpetuating industry that doesn’t achieve anything except alienating anyone not in the liberal urban elite clique.
  4. The even wiser boater would have a monitoring system that checks current is being taken by the light filament when it’s switched on, and flashes a red warning light at the helm if it isn’t.
  5. Well I am gay. I have on occasion had some fairly unpleasant things said to me but when that happened, I didn’t curl up into a ball of “being offended”. I felt sorry for the stupidity of the perpetrator and yes perhaps a bit angry, but not offended. Because being offended is a rather negative and pointless thing and I choose not to waste energy on it. So why is it then, if not a choice, that some people will find a specific thing offensive whilst others don’t. The thing itself is proven not to be intrinsically offensive as some people find it not so. It is only the impact on the receiver, and only one person is in control of how that person behaves in response - that person.
  6. What happens when the whispergen doesn’t start for some reason? Fault / out of fuel / turned off / trigger to turn on faulty etc. That seems quite an insecure defence against under voltage if that is all you have.
  7. No I absolutely disagree and this is a very important point. Being offended is absolutely a choice, even if it might be a slightly subliminal one. Nothing is fundamentally offensive, it is just a behaviour you learn (you learn to be offended about some things, not offended by other things). You can learn different behaviours if you want, and of course what is “offensive” is time- and region-variant, not set in stone by some empiric laws of nature. If you take the view that anyone has the right to be offended about anything they claim to be offensive (genuinely held, or put on) it becomes a powerful weapon to silence any dissenting views and thus ultimately it “doesn’t work”. As I said, offence is purely in the eye of the receiver and this is clearly proven because for any given trigger, some people may find it offensive whilst some other people don’t. According to the choices they made.
  8. It depends on where the failure occurred. I plan to take control of the charging light as the field will no longer be directly connected to the warning light - it wouldn’t work as it’s high side switched and when the engine is not running / no pulses from the field tapping, the regulator chip goes to sleep and no current would flow via the regulator to the field, hence the light wouldn’t come on. So the light will be controlled by a FET on the new regulator board. Of course if something bad happens to the alternator eg wire comes off / brushes lose contact etc, it’s going to be picked up by the microprocessor which can turn on the FET and thus bring on the warning. Unless the fault lies with the microprocessor of course! The relay would really only be of use to deal with a wiring short or regulator chip failure whereby full voltage was applied to the field. Unless I have a completely independent means of operating the relay above a certain max voltage. But how many levels of “a monitoring system to monitor the monitoring system” should one have!
  9. The only down side is that every element you introduce is a potential source of a fault.
  10. I’m not white, I’m pink with delicate hues of light brown (dirt). Anyway this is the problem with all this woke BS - whereas the likes of Martin Luther King was all about judging people by their character / actions, not their skin colour, now the first thing you have to do is to compartmentalise everyone into groups of skin colour, race, religion, gender etc and then make sure you use the right words to reflect the groups. In other words, it is mandatory to discriminate on grounds of colour, gender etc.
  11. I think there is a happy medium though. We all agree that charging up to 4.something volts is a bad idea. But equally, charging to only 80% SoC is perhaps unduly cautious. There is a happy medium somewhere in between! Anyway I had a look at the Nordkyn site, which certainly has some good stuff despite a few technical faux pas. He does encourage great rigour in protection against “unexpected faults” and so I’m now wondering whether I’ve been clever enough in my design. He promotes the dual bus scheme (ie separate disconnects for charging and services) whereas I’d thought that just a battery disconnect and controlled alternator would be adequate. Maybe I’m being over confident! In our case the charge sources are the alternator and the Combi. I wouldn’t really want to put the Combi on the charge bus because it would then stop inverting if there were a battery disconnect due to alternator over-voltage. I suppose a Combi in charge mode can develop a fault resulting in over-voltage but it’s pretty uncommon I think. Unless the Combi becomes totally goosed but still producing power, I’ll be able to turn off charging via CANBUS in the event of over-voltage. Since I am breaking into the alternator to add the external regulator, it would be quite simple to add a relay in the field current wire that could open in the event of loss of control of the alternator regulation. Once the field current is cut, the alternator is effectively turned off in a benign way. I haven’t done the PCB layout for the regulator yet so I think I’ll add that capability.
  12. Well you could do it thus, at a pinch, although it’s not a method I’d recommend. the horn and the light are both wired across the two existing wires, except that each has a diode in series with the device, but the diodes are pointing in opposite directions. You then have a double pole switch (centre off) - switch one way puts the + and - onto the wires, switch the other way puts the + and - onto the wires but the other way round. According to which wire is +, the device whose diode conducts in that direction, will operate. Need big diodes to take the maximum current plus a chunk of reserve.
  13. You are missing a bit... god gave us two ears, one mouth, and ten fingers, it is wise to use them in the same proportions (if you are a keyboard warrior!)
  14. No that isn’t really what virtue signalling is, in my book anyway. I gave a specific example of Tony brooks doing a “good thing” and telling us about it. Definitely not virtue signalling. If you particularly wanted to spell out the good things you’ve done in your life, it wouldn’t really be VS, although it might seem a bit odd. In Wanted’s case, it certainly wasn’t the life dedicated to helping young people that irked, that was very commendable. It was his intolerance to any views/way of thinking other than his own, and justifying it by citing his “good deeds” to indicate his moral superiority and thus the entitled winner of the argument regardless of rationality or other points of view. He wanted to silence any alternative views. Classic VS.
  15. Occasionally yes, but mostly no. I am a homosexual bloke who often has to suffer jibes and comments. Mostly they are meant in fun, which is fine. I mostly embrace them because to do so is to disempower those words. If I got all “victim” every time I heard them, I would be, well, a victim! Trying to control the use of potentially offensive words simply gives them more power, which obviously is counter-productive.
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