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Type: Posts; User: harralk

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  1. Replies
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    A splash rail will be easy enough to add with...

    A splash rail will be easy enough to add with some balsa strip and filler after the mold form is milled out. I also figure finding the CG on a prototype hull will be easier than trying to calculate...
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    Thanks for the input. I expect this will be a...

    Thanks for the input. I expect this will be a bit of an iterative effort, being my first medium-scale boat and all. But it sounds like I should smooth out the inside of the tunnel section and...
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    Designed my own cat - looking for input

    First of all, I'm fairly new to boats although I've been flying for several years. As part of a composites project, I took the time to draw up my own design for a 1.3-meter catamaran. Since this is...
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    Some have managed to turbocharge two-stroke RC...

    Some have managed to turbocharge two-stroke RC car engines, but I've also been told that based on the geometry of the ports it does no good at all. You could do some research and possibly use the...
  5. RE: Good yet inexpesnive material for CNC mold/tool

    I just picked up a sheet of pink foam from home depot.&#160; We'll see how this works.&#160; I'll start a&#160;new build thread about the project once I actually get somewhere with it.&#160; </p>

    </p>

    Thanks...
  6. RE: Good yet inexpesnive material for CNC mold/tool

    That looks perfect.&#160; So where's a good place to&#160;find 2lb Styrofoam or blue foam?
  7. RE: Good yet inexpesnive material for CNC mold/tool

    Has anyone used hydrostone or similar materials for this purpose?
  8. RE: Good yet inexpesnive material for CNC mold/tool

    I was thinking I might have to do something like that with MDF, although I haven't used it for this purpose.* </p>

    </p>

    I just had a thought, might I be able to find a medium to high density...
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    RE: Camera questions... GOPRO OR...?

    I'm not an expert with FPV yet, but I have done a fair bit of research into the cameras that are available and my opinion is, if you plan to go with FPV try to get the GOPRO.&#160; It has the best...
  10. Good yet inexpesnive material for CNC mold/tool

    I've been playing around with the idea of building my own composite boat and I have a 3D model drawn up that I want to work out on a CNC mill. I just wanted to get some opinions/advice from experts...
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    RE: Tank/Buggy With Jump Jets

    Since most threads in this forum are mostly dead anyways, I don't feel too guilty reviving this one.....</p>

    </p>

    If you're still looking to build this thing I've worked out the mechanics for a...
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    RE: Would the POV Mac-10 work?

    I'm not familiar with that particular camera, but if it has the ability to live stream through a USB or other type of port then you can get a wireless data system to send the video through.&#160; Make...
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    RE: Turnigy H.A.L. (Heavy Aerial Lift)

    Has it flown yet? I'm curious what kind of flight time youcan get. I did an analysis based on Newton's momentum theorem and using the energy density of batteries available off the shelf I determined...
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    RE: Perhaps the dumbest question of the month

    That's acutally a very good question, and one that I had when I was first learning to fly.&#160;

    I agree with everyone else here.&#160; I've been flying smaller size planes for years and I've never really...
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    RE: First GoPro Flight

    I have to say, that is indeed awesome!&#160; Great video!

    I've been looking at Gopro's new wifi transmitter system.&#160; I don't suppose you've used that yet or know someone who has?
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    RE: I could not resist...

    in case you didn't know already, you can usually fix the bubbles in the covering. They're usually a result of shipping the wood airframe from one part of the world to another and not necessarily a...
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    RE: Batman lives!

    Awesome footage!!&#160; I love watching wingsuit flying.&#160; Doubt I'll ever have the nerve to try it.&#160; At one point in this video it looks like the red guy brushes against the cliff face.&#160;
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    RE: Hobbico Starter

    My assumption is that you indeed have a defective starter.&#160; I had that exact starter and engine for my first plane and it turned my .46 LA over JUST FINE on my 12V field battery.&#160; In fact, after the...
  19. RE: is this normal? Electric motor mounted to the right

    It's called P-factor and yes, it's normal. It's put in there deliberately to compensate for the plane's tendency toyaw to the left when the plane pitches up.

    There won't be any noticeable effects...
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    RE: I have a HOAYE 4.5

    I've never played around with the 4.5" Hoaye, but their 5" unit is&#160;ok.&#160;

    If you wanted to sell it&#160;they're like $25 new, plus shipping.
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    RE: Brushless kv ?

    the Kv rating for a brushless motoris the rating for "RPM per volt". It's an obscure valueused to determine how fast a motor will spin given a particular voltage input.

    Here's an example:
    a motor...
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    RE: Need Help - Can't Find Right Motor

    By my calculations, you should be running a motor with a Kv rating of no more than 2000 with a&#160;6S battery at full power.&#160; 2500Kv is too high for that fan at full speed.&#160; You could try limiting the...
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    RE: What batteries for 5

    My guess is you have either the 7-blade Haoye or 4-blade ChangeSunfan from hobbyking, since I have the same 700Kv motor from them. My input will be for either of these two fans based on my...
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    RE: Where to buy ducted fans

    That's the first motor I ordered for the Haoye. The big blue one in my earlier pics.

    At least that's what I'm assuming he's talking about
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    RE: Where to buy ducted fans

    I'm sorry, see what?
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