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  1. Re: Gate motor and fence energizer on solar with security in mind.

    Not sure how far some distance away is, but here's what I would do.

    1) Run the DC supply to the gate motor in 4 mm2 wire, if quite far run in 6 mm2 cable.
    2) Use a LiFePO4 battery, it's voltage...
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    Re: How Strong Are Bolt Threads?

    Thanks. Also worth remembering that for general applications, a bolts strength in shear is about 60% of it's tensile strength.
    (Old rule of thumb)
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    Re: How Strong Are Bolt Threads?

    Nice video, thanks for sharing.

    Great test for thread strength without having to worry about the bolt failing in tension first.
  4. Re: Recoveries and Towbars - Some Maths and Principles

    I like open discussions, it forces one to think and re-evaluate.
    I am purposely working with worst case scenarios, not average or your everday easy recovery.
    As can be seen by my replies in blue,...
  5. Recoveries and Towbars - Some Maths and Principles

    Recoveries and Towbars

    I have included some basic calculations and sketches to help illustrate the forces that can be generated during static and kinetic recoveries.
    I have also demonstrated how...
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    Re: Kaokoland March 2023

    Regarding your point #2.

    March is very much part of the late rain season and riverbeds will be still very wet and sporadically flowing in places.
    I would stay out of riverbeds unless you are...
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    Re: 1st Camping Trip: Advice Needed

    I have attached my comprehensive Camping/Travel/Overlanding check list.

    I have built it up over the years and think it covers just about everything needed, from a basic weekend camp to an extended...
  8. Re: Understanding, and solving problems with Anderson / Bradley-Harris connectors

    Jonatan, great video thanks.

    Mabe just PM Dirk and ask him to correct the title and clean up the thread or to delete the thread and you re-post again.

    Would be nice to have a helpful on topic...
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    Re: Failed Coupler

    About three years ago I removed my Land Cruiser's rear bumper, as well as the complete towbar frame to do a full chassis clean and spray with Tectyl for corrosion protection.
    Once the rear bumper...
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    Re: Failed Coupler

    It would make it worse, because:

    1) The trailer is still decelerating at the same rate, so the downward force on the towbar from the deceleration is the same.
    2) Seeing as the trailer axle is...
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    Re: Failed Coupler

    I would also suspect this to be true and quite possible.
    Just thinking of all the different scenarios makes my head spin.

    Imagine a trailer with a fairly high centre of gravity, hitched in the...
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    Re: Failed Coupler

    In a way, Yes. But I suspect a whole lot of other factors will come into play in that scenario, especially regarding where the inertial damping is mostly coming from, vehicle or trailer.
    That's why...
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    Re: Failed Coupler

    Ok, so I got some very interesting results !!

    I measured the acceleration (G-Forces) in the Z-Axis direction of an unloaded towbar.
    I drove at different speeds over a speed bump of 3.0m wide x...
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    Re: Failed Coupler

    This has got me inquisitive. I think it would be Interesting to get some real world values.

    I will fit an accelerometer to my towbar today, drive over some local speed bumps at a reasonable speed...
  15. Re: Victron Phoenix 12/500 Bulging - Help/Advice

    Have to agree, after seeing the insides as posted by Bees, I think you have nothing much to worry about.
    Maybe just a bit of post moulding plastic deformation.
  16. Re: Victron Phoenix 12/500 Bulging - Help/Advice

    You may not be the only one with this problem.

    Phoenix 12/500 surface bulging

    My Victron Phoenix 12/500VA (brand new, not yet installed) has suddenly developed a palpable and visible bulge on...
  17. Re: Victron Phoenix 12/500 Bulging - Help/Advice

    I have three likely scenarios/guesses in order of probability.

    1) You screwed the bottom side mount feet screws down to hard and the top and side coverings have deformed.
    2) It overheated and the...
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    Re: 2 Stroke Generator - AVR?

    I also have one of these, but the Yamaha ET950 that I bought many, many years ago. I have probably used it three or fours times.
    The problem is that it's rpm (Hz) and voltage output are extremely...
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    Re: Failed Coupler

    My quick take on the matter.

    There is a stress concentration where the vertical plate meets the horizontal plate.
    This stress concentration is highest at the front end 90 degree bend.(Encircled...
  20. Thread: Stuck

    by Searcher
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    Re: Stuck

    Hectic !!
    Has the operator still got a job come Monday ?
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    Re: New Geyser Energy Storage System

    Interesting developments all round.

    I have to wonder what ever happened to the Molten Salts heat storage concepts. A few years ago it looked very promising.
    It has the advantage of using latent...
  22. Thread: Tpms ???

    by Searcher
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    Re: Tpms ???

    Interesting question.

    Going by their own description of it's working principle: "Thus if there is any one tire in 4 tires has insufficient pressure, its number of turns is different from other...
  23. Thread: Tpms ???

    by Searcher
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    Re: Tpms ???

    I think Wikipedia does a fair explanation.

    Tangential speed (v), rotational speed (ωcyc), and radial distance (r), are related by the following equation:

    v = 2 π r ωcyc
    v = r ωrad

    An...
  24. Thread: Tpms ???

    by Searcher
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    Re: Tpms ???

    Nope, see my tank track analogy I mentioned.
    The OD or even the cicumference of a tyre is not the final determining factor of the actual hub rpm, i.e because the tyre distorts at the tyre/road...
  25. Thread: Tpms ???

    by Searcher
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    Re: Tpms ???

    Yes. The radius from axle centre to ground is reduced as a tyre deflates, so it has to speed up due to the decreased circle cicumference.

    Think of a tanks track, the rotaional speed (rpm) of the...
  26. Thread: Tpms ???

    by Searcher
    Replies
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    Re: Tpms ???

    Looks like it is a Loyal Defender OBD TPMS.

    Below is a link with a bit of info on it and a few basic instructions.
    Just click of "view all" if it doesn't display fully.
    ...
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    Re: Discussion: Towing with LC 105 4.5 EFI

    Most decent gearboxes are designed with a 1:1 ratio in 4th gear.
    Meaning that the gearbox input and output shafts are locked and not transmitting power through the layshaft.
    Basically this means...
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    Sticky: Re: Useful info for Namibia

    Namibia.

    Service station owners on alert for possible shutdowns. (This week)

    https://www.namibian.com.na/114365/read/Service-station-owners-on-alert-for-possible-shutdowns
  29. Re: Anysberg route - Montagu to Matjiesfontein.

    These still seem current.

    Bookings at Cape Nature Reservations: 0870878250
    Reception office in the Anysberg Nature Reserve: 023-5511922
  30. Re: Anysberg route - Montagu to Matjiesfontein.

    I have done that route a few times, easy drive, with stunning scenery.
    As mentioned, just phone ahead and get the gate lock codes.
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    Wiring Unlimited

    A mate of mine sent me this excellent booklet by Victron.

    It is easy to understand, very well explained and should be a valuable source of reference for Forum Members wanting to learn all about...
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    Re: Off grid camping

    Not much info to go on, but I would recommend around 200W of solar panels with a 20A MPPT solar charger.
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    Re: Makro to start selling ‘power walls’

    We are going seriously OT here, but no, the heat transfer is not linear.
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    Re: Abandoned Recovery near Khaudum

    Do you think it was attempted theft ?

    Recovery vehicle trailer certainly looks suspect, no number plates, no rear brake or indicator lights. ::)
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    Re: Makro to start selling ‘power walls’

    Nope definetly not entropy. You probably meant enthalpy, closer, but it's also not that.
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