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Type: Posts; User: BMatthews

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  1. Replies
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    I don't have any ideas for you that we didn't...

    I don't have any ideas for you that we didn't exchange in your past threads. The big issue is the current having to pass through the slip rings and contacts. There's just not really a good way to...
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    Moved from Aerodynamics to Scratch Building since...

    Moved from Aerodynamics to Scratch Building since this is clearly a build log and not an aerodynamics thread.

    Have you got the right motors for your project yet?
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    You're right aeajr, 64oz is 4 not 5 lbs. I don't...

    You're right aeajr, 64oz is 4 not 5 lbs. I don't know where my math was when I posted that.

    Common reports on models with 100 watts per lb suggests that the climb would be well over 45 degrees...
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    The interesting thing is that if we look at the...

    The interesting thing is that if we look at the amount of aileron deflection to balance out the prop torque it's surprisingly little. And to me that suggests that the slip stream effect on the fixed...
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    I know that Rustoleum is gasoline resistant. But...

    I know that Rustoleum is gasoline resistant. But is it glow fuel resistant as well? Because that's what he's asking instead of simply "methanol proof".

    The only product other than butyrate dope,...
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    A new thread that follows the build, covering and...

    A new thread that follows the build, covering and flying would be well received by those that are considering a first try at building vs buy and fly. Please consider the idea. I know you'd get lots...
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    If you guys are looking for kits to build be sure...

    If you guys are looking for kits to build be sure to check out Skybench Aerotech for their kits. Ray has some nice looking designs. Likely a touch more work and attention needed but you'll end up...
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    The pictures I found at; ...

    The pictures I found at;

    http://www.flyzoneplanes.com/airplanes/flza3000/index.html

    seem to show that the wing servos are just pushed in and held in place with a sticky clear patch. Is the one...
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    It's a 64oz model which is a touch over 5 lbs. ...

    It's a 64oz model which is a touch over 5 lbs. First off that seems a little heavy. And sure enough the wing loading is up at around 10 oz/sqft. That's a little high for a simple fly around model...
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    I'll be watching keenly for a flight report. ...

    I'll be watching keenly for a flight report.

    Even in the time since 2003 when this thread started out we've seen a huge movement towards small and light ARF models and gear. The weight warnings...
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    (gloating mode on) I've got one that is still...

    (gloating mode on) I've got one that is still NIB. Never got around to even running it yet..... (gloating mode off)

    :D
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    It's a lot of work to do up a set of plans. So...

    It's a lot of work to do up a set of plans. So it would require that you find someone with an interest in the model. Otherwise if they want to do it for pay it'll cost a small fortune. Hopefully...
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    Yep, I totally agree with the idea that...

    Yep, I totally agree with the idea that extrapolating from static tests will be near useless. At least not without a lot of real world data to use for coming up with an algorithm.

    I gave that...
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    The power to weight of the motor ESC and battery...

    The power to weight of the motor ESC and battery means less than nothing. It's the power to weight of the overall model that matters. And it is that property that bjr was referring to.

    You...
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    Keep in mind the wing loading and scale like...

    Keep in mind the wing loading and scale like flying speed too. For the Hannibal I'd want to pull out the stops for making it light so it'll fly slow and stately like the original.

    Also keep in...
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    There's enough 3 views and pictures of the real...

    There's enough 3 views and pictures of the real one that I don't think it would be too hard to make a set of plans of your own. Especially if you're looking at making it a "stand off and squint"...
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    You're going to find that for static testing of...

    You're going to find that for static testing of props in the 8 to 12 inch diameter range once you get much over a 4 inch pitch that the blades will stall and pull a large turbulent bubble with them. ...
  18. How big is the parachute when it's rolled up and...

    How big is the parachute when it's rolled up and ready to pack? We'd need to know that before we can offer any suggestions.

    One option is to start with a known good design such as a Sr Telemaster...
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    If by some chance both engines quit on one side...

    If by some chance both engines quit on one side the MOST IMPORTANT THING is to keep your flying speed up even if it means having to maintain a shallow dive as you come back to the field. Let the...
  20. That video had me totally sucked in until the guy...

    That video had me totally sucked in until the guy belts the part with the big mallet. Saw it first time some years back and it still makes me smile to see it again and again. Truly excellent British...
  21. A steam jet from a kettle makes short work of...

    A steam jet from a kettle makes short work of warping the wood back straight.

    As for the wing angle I'm still as confused as DaRock. Are you talking sweep back or dihedral? Give us a little more...
  22. A datum line is not an aerodynamic reference. ...

    A datum line is not an aerodynamic reference. It's a convenience for the designer. On the other hand the model will fly to where the wing is angled to the degree needed for generating the lift...
  23. Pictures of the model or links to the maker would...

    Pictures of the model or links to the maker would help a lot. The options for both issues all depend on how it's designed and built and if it's already covered or not. Also just how big is the warp?
  24. You're looking for a way to find out where to...

    You're looking for a way to find out where to balance the model.

    Using your square works but you MUST make sure that the lower wing is sitting at a 0 angle before you start. So that's the...
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    Yep, the idea of moving the CG to suit the flyer...

    Yep, the idea of moving the CG to suit the flyer is a good one. Some like a little more positive pitch stability and others find they like a more minimal amount. Shifting the CG and doing the...
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