Allay my fears, or beat me up

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  • runzwithsizorz
    Senior Member
    • Jan 2009
    • 896
    #1

    Allay my fears, or beat me up

    Can someone help allay my fears. According to some of the things I've seen and read my build,(and ones like it),should be *adequate*. Yet
    other posts lead me to fear over-amping, and too much heat. I do realize that getting a lower KV motor, and higher volt batteries for around a
    thousand dollars would probably solve this, IF I had it to spare, but I don't right now, yeah I know, sucks to be me. My goal is to have a fairly
    reliable boat, mostly just for sport, and to maybe hit speeds in the 50's, with a fair amount of run time.
    What I have is a Titan 33, a Leo 4092 2080kv, a used FC 300amp HV, or new FC 200amp HV, and 4 Hyperion 4s 35c 6500mah batteries,(is their c
    rating enough?). Was thinking of getting a couple of high c 5s batteries for go fast giggles. I do have an elogger v4. throwing everything in the
    boat she weighs over 12 pounds.
    Someone has posted a Neu 1100kv motor for sale, and I was thinking that *maybe* it with the Hyperions in series would work, alas, I still
    think the c rating is too low. More money will be coming in the months to follow, but I would really like to get on the water NOW.
    Your opinions are appreciated, Todd
    Tags: None
    • Fluid
      Fast and Furious
      • Apr 2007
      • 8012
      #2
      Properly setup your current equipment should come close to your goal. I have had several Titan 40s with different 4S setups, all of which had exceeded 50 mph. My current setup is a Neu 1521/1.5D with 4S2P/5000 Hyperions spinning a y547 prop. It's a race-winning setup, but it does pull some amps...averaging 180+ for a one-mile heat.

      Your packs should be good for a safe 170 amps each, so in 4S2P arrangement they should be ample. I'd not go larger than an m445 - which propelled one of my hulls to over 50 with another setup. What won't help you is the weight - my current Titan 40 weighs 9.5 pounds and is considered pretty heavy. Over 12 pounds means a higher amp draw and more difficulty in getting on plane (where the highest amp spikes occur). Do you have all four packs in the boat??

      Running the boat on 8S with a low Kv motor is one solution, but I'd try what you have first. Run for one minute (stop watch!) and check the temps. Go out for another, etc. then look at the datalogging before you decide if it's safe with your setup.



      .
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        • martin
          Fast Electric Addict!
          • Aug 2010
          • 2887
          #3
          Fluid how do you rate the Hyperion 35c compared with the 45c versions as I have more choice on the 35c in the UK.

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            • Fluid
              Fast and Furious
              • Apr 2007
              • 8012
              #4
              I have only used the 35C cells in the 6500mAH versions and only in 1P setups. They work great in high amp use, at least up to 180 amps.



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                • runzwithsizorz
                  Senior Member
                  • Jan 2009
                  • 896
                  #5
                  Originally posted by Fluid
                  Properly setup your current equipment should come close to your goal. I have had several Titan 40s with different 4S setups, all of which had exceeded 50 mph. My current setup is a Neu 1521/1.5D with 4S2P/5000 Hyperions spinning a y547 prop. It's a race-winning setup, but it does pull some amps...averaging 180+ for a one-mile heat.

                  Your packs should be good for a safe 170 amps each, so in 4S2P arrangement they should be ample. I'd not go larger than an m445 - which propelled one of my hulls to over 50 with another setup. What won't help you is the weight - my current Titan 40 weighs 9.5 pounds and is considered pretty heavy. Over 12 pounds means a higher amp draw and more difficulty in getting on plane (where the highest amp spikes occur). Do you have all four packs in the boat??

                  Running the boat on 8S with a low Kv motor is one solution, but I'd try what you have first. Run for one minute (stop watch!) and check the temps. Go out for another, etc. then look at the datalogging before you decide if it's safe with your setup.



                  .
                  Thank you so much for responding Jay! It was actually you I was trolling for. My finances will improve, so down the line there will be a motor, and battery upgrade, but for now your input is encouraging for what I now have. Something I *could* afford now is a set of dinogy 5s batteries for this set up, your thoughts?? I believe I have enough props for this boat, and know enough to start out small. I also know to monitor temps, which is why this boat has 3 temp probes, rpm sensor, gps and transmits LIVE with alarms, and timers. And no Jay, I did not weigh the boat with all 4 batteries, LOL, though the thought of having 26,000 mah IS intriguing. Other reasons for weight are the 1/4" ply rails, and transom, CF reinforced seams,and hull bottom, modified stinger, and wet well for a full 1/2" in travel, PLUS other surprizes

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