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Type: Posts; User: mfr02

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  1. It might be nothing to do with the radio. If the...

    It might be nothing to do with the radio. If the battery is unable to supply the full current demanded, it might brown-out, dropping the voltage to the point where the ESC gets cautious, switches...
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    The objective of a catamaran is speed. It gets...

    The objective of a catamaran is speed. It gets this when one hull has cleared the water. When this has been achieved, a very fine line is being trodden between going fast and falling over. A...
  3. A sailboat cannot sail directly into wind, but if...

    A sailboat cannot sail directly into wind, but if angled off the wind, will drive forward. This is when you pull the sails in nearly all the way. When sailing downwind, the sails just act as a...
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    Check out your local legally permitted...

    Check out your local legally permitted frequencies for air and surface. Avoid air. Quite rightly, flyboys get twitchy when somebody uses their allocated frequencies. As do the authorities when...
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    Yes, the designer used old style hobby grade...

    Yes, the designer used old style hobby grade radio. If looking for long range in rough water, avoid 2.4GHz, and especially the low cost "park flyer" gear which only has a few dozen yards range. The...
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    How does it perform when towing a line? Just...

    How does it perform when towing a line? Just trying to add some relevance to the OP
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    If you want range, avoid any radio with any hint...

    If you want range, avoid any radio with any hint of "Park" in the name or specification. Look for words like "full range". This should give you several hundred yards with a sensibly sited receiver....
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    Its a sport boat intended for smooth lakes and...

    Its a sport boat intended for smooth lakes and fairly close quarter action rather than doing work and carrying a load.
    Attaching a line is fraught with potential problems. The water cooling and...
  9. The problem with old radio gear is that the...

    The problem with old radio gear is that the standards regarding channel bandwidth have changed over the years. An older outfit might not play well with somebody else's outfit in the same band. But...
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    Welcome to the higher form of modelling. You...

    Welcome to the higher form of modelling. You will find that every session is different, and you will keep the brains in better working order and the interest fresh, hopefully for many years to come....
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    If its in an enclosed space, forget any...

    If its in an enclosed space, forget any automotive battery. They are rarely sealed, and are unsuited to the charge/discharge cycles that model boat use gives them, mostly because they tend to vent,...
  12. For a Victoria the servos used are probably...

    For a Victoria the servos used are probably overkill, but each to his own. I found that the best arrangement for rigging the servo arm was to ensure that when the arm was fully in, the running line...
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    The servo operating the existing control is...

    The servo operating the existing control is probably the simplest and certainly the lowest cost way to do the job.
    I don't follow the idea of 2 ESCs for one motor. And 400 amps seems excessive,...
  14. OK-ish on one tack, a dog on the other.

    OK-ish on one tack, a dog on the other.
  15. Thread: How much wight ?

    by mfr02
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    90

    Without any clues as to the boat, it's all...

    Without any clues as to the boat, it's all guesswork, but if it has a fin bulb that needs filling, just pour mixed size lead shot into it until it's full. Generally speaking, you can't get too much...
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    Unless you know what the internal arrangements of...

    Unless you know what the internal arrangements of the ESC built-in BEC is, don't try upping the voltage beyond the stated limit.
    The usual way of disabling a BEC is by disconnecting the red lead...
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    1,239

    Performance and cheap rarely fit together,...

    Performance and cheap rarely fit together, especially in a large model.
    The most economic way to control 3 motors is probably 3 ESCs each suited to the motor it is controlling, especially high power...
  18. Thread: i need help

    by mfr02
    Replies
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    264

    Whatever it gets made of, it will need some form...

    Whatever it gets made of, it will need some form of protection/sealing to either protect it from the elements and/or look like you intended and keep it that way. This applies to everything from...
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    You are unlikely to find better than Raboesch for...

    You are unlikely to find better than Raboesch for props. It just becomes a question of whether the chosen prop when turned by your chosen motor will move a sufficient quantity of water far and fast...
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    Without a link to the actual prop, no idea if...

    Without a link to the actual prop, no idea if something else would be better. Without knowing the expectations, same again.
    The prop usually gets mounted on the outer end of a prop shaft, there are...
  21. Tugs and service craft tend to be stable. Not...

    Tugs and service craft tend to be stable. Not very much in the RTS field, though*. You need to consider the weight of the gopro and its mount and how high it will be. Then consider the water. Is...
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    A GOOD IDEA is to hunt around sites that carry...

    A GOOD IDEA is to hunt around sites that carry build logs. Lots of hints and tips there. Back in the elder days there was a selection of magazines which were usually more up to date than the books...
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    6-8' is a world of it's own. For a first scratch...

    6-8' is a world of it's own. For a first scratch build, and this is only an opinion, I would look at something 3-4'. This is an area with plenty of expertise, and the inevitable mistakes are less...
  24. Thread: Prop size

    by mfr02
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    345

    I know little about brushless motors, but from...

    I know little about brushless motors, but from what I have read by people who do, that sounds about right for the KV figure. However, that does't indicate the actual power that it can deliver - it...
  25. Thread: Prop size

    by mfr02
    Replies
    7
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    345

    I have a bit of creeping uncertainty about using...

    I have a bit of creeping uncertainty about using a racing two blade prop on a TUG. 3 bade scale types are readily available, as are 4 blade types. Both these are shaped to perform on reverse as...
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