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    Fast attack craft
    "...I charge them up occasionally and as luck would have it we recently had a power cut so I was able to power up a couple of car headlights so That we could see...." A very clever idea! You can get car accessories like immersion coils for boiling water, which may also be useful in the future. I have a number of old Uninterruptible Power Supplies sitting around with dead batteries - these will run off 12v
    car batteries
    very nicely and give me 240v if I need it - though at the cost of some efficiency. The last power cut we had here was 2 days ago, and if we keep running our energy strategy in the way we are currently doing, I expect they will become a regular feature of life. Luckily it wasn't long, so the web servers stayed up on their UPSs.....
    11 months ago by DodgyGeezer
    Hints on Ballast
    Hi Peter, Our boats are relatively small so we can usually trim and ballast them with useful "payload", i.e. decent size batteries for longer run times instead of "dead lead"! I don't think any of my ships (up to 1.5m) weigh more than about 5kg max. My Sea Scout is about 2.1kg. Runs full bore for around an hour on a 4Ah LiPo๐Ÿ˜Š WO Nerys is also absolutely right๐Ÿ‘ My Sea Scout didn't need extra ballast, it trimmed perfectly with a 4Ah Lipo. My long thin naval ships (LoA to Beam ratio ca 10 to 1) and a lot of top hamper, do need ballasting, so I use one or more SLA batteries so I can patrol all day if I want to๐Ÿ˜Š Trimming is a doddle, just move the SLA(s) fore or aft to suit. That tug with 20kg ballast must be huge๐Ÿ˜ฎ I've seen huge (>2m!) models of container ships and tankers etc over here, which use
    car batteries
    for power thus reducing the need for dead ballast. Such ships are often built in two or three sections bolted together at double bulkheads with computer type D-shell electrical connections. Must take a lot of detailed planning. Doh my head aches ๐Ÿค• Ya pays yer money and takes yer choice! Cheers, Doug ๐Ÿ˜Ž
    12 months ago by RNinMunich

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