New Project begins this week.

Or more to the point one that has been awaiting financing will begin on Thursday.

sir-issac

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10 Responses to New Project begins this week.

  1. What are you going to use for weights?

    If you’re really building it to that scale, it looks like it might be able to do 150 meters pretty easily.

  2. Murray says:

    I’m casting cement blocks that fit round the arm and are U-pined together and then secured with a a screwblock to stop them moving.

    I’ll also be casting some ammunition soon in a couple of different weights. All the ranges that we’ll be firing on in public are under 100 meters and I took my 2ic to see the one we’re going to be shooting on in Janurary and he fell about laughing. The ballista would clear the other side of the caravan park next door to the range area.

  3. You might have to detune to prevent safety problems. Pity.

  4. Errol says:

    Will it make much difference if you fire it uphill? 🙂

  5. Murray says:

    We’ll just be using less weight. A LOT less weight. Or bigger ammunition.

    Firing into an elevation is like interrupting the trajectory arc so yes, it shortens the range. On the up side being on an elevation increases the range. Like on Artillery Hill at Taupo.

  6. Because these use a high firing arc, firing up hill doesn’t actually shorten the range as much as you might think. Unless you’re firing up a 30 degree slope, or something grotesque like that.

  7. Because these use a high firing arc, firing up hill doesn’t actually shorten the range as much as you might think. Unless you’re firing up a 30 degree slope, or something grotesque like that.

  8. Murray says:

    Depends on your arc. We tend to tune the machines to a set distance and not always maximum range.

    Also New Zealand hills tend towards being more hillesque and vertical than in some other places. I fell about laughing at what the English liked to call mountains. Here we’d call them speed bumps.

    30 degrees is a starting point here on the ring of fire.

  9. Errol says:

    Auckland has many things that we refer to as ‘hill’ or ‘cone’ that the Poms insisted on naming ‘Mount someoneIoweafavour’. Many of them are a decent stroll if you go straight upslope. Oddly, Rangitoto (island) is the largest, and an exception.

    I’m now having bad thoughts about which roads we could interdict with Sir Issac at the top of Mt Eden.

  10. I know what you mean about the varying meanings of the word “mountain”. I grew up in Oregon, which has the Cascade Mountains. It isn’t the largest mountain range in the world but it’s respectable, and we have several major mountains that top 10,000 feet, going well above timber line.

    When I moved to Massachusetts, I found out that a “mountain” in New England was considered something over 4,000 feet altitude, and they thought those were pretty damned large.

    From Portland, you can see Mt. Hood, Mt. Adams, and Mt. St. Helens on a clear day. From Boston you can’t see anything except Boston.

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