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Type: Posts; User: jrf

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  1. Replies
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    Assuming the optimum prop for each engine, the...

    Assuming the optimum prop for each engine, the Moki would be the fastest. The DA the slowest and the big 4 strokes in between.

    Bear in mind, with a speed prop on any of those engines, the...
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    You seem to have done an adequate fix for the...

    You seem to have done an adequate fix for the problem, and once the wing is closed, no one will see it. I've never built a kit that didn't have some kind of glitch. It's part of the building...
  3. Thread: Balancing

    by jrf
    Replies
    21
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    536

    It's really very simple. A low wing plane will...

    It's really very simple. A low wing plane will not stay in a level position when it is upright on the balancer. Turning it upside down allows it to stay in a level position while you are trying to...
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    Throttle cut for twin engines.

    I am setting up a twin engine (glow) airplane with a Spectrum DX7s transmitter. I am using separate channels (throttle and gear) for the throttles and I have them mixed to operate together. They...
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    Sportee 60

    Tidewater Hobbies (sold by Circus Hobbies, now known as Horizon Hobby) Sportee 60. Completely unbuildable. Bad wood, bad laser cutting, plans and instruction manual showed the 40 size instead of...
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    That's because we're talking about a US1000.

    That's because we're talking about a US1000.
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    The major retailers (Tower, Horizon, Hobby...

    The major retailers (Tower, Horizon, Hobby People, etc) have started calling quads, even toy quads, "Drones". That is a battle we have already lost. The good news is that they are limiting that...
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    It is clear that we do not know what "within the...

    It is clear that we do not know what "within the programming of" means. Does anyone know of another activity that operates "within the programing of a CBO" for federal purposes? Has congress used...
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    Hound Dog: Watched the video. Clearly the guy...

    Hound Dog:

    Watched the video. Clearly the guy does not have flying skills, but at no time did I see him endanger anyone (including himself) or anything (except his airplane). It appears that he...
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    Rumley: What part of the statutory criteria do...

    Rumley:

    What part of the statutory criteria do you find burdensome?
  11. Replies
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    Anyone remember the "Zagi" flying wing? They...

    Anyone remember the "Zagi" flying wing? They sold a hundred thousand of them one year, then a year later they literally couldn't give them away. The company that made them went bankrupt and several...
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    I apologize for the use of the word "legally". ...

    I apologize for the use of the word "legally". It is an interpretation of the FAA and a guideline of the CBO. I refer you to he FAA's guidelines for Model Aircraft at...
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    The FAA and congress have repeatedly made it...

    The FAA and congress have repeatedly made it clear that a "Model Airplane" can not legally fly above 400' agl anywhere in the USA. The fact that it is unenforceable does not make it invalid. Get...
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    Fpv

    Fpv
  15. Replies
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    No, that is not correct. The sheeting should be...

    No, that is not correct. The sheeting should be glued to the formers, leaving a part of the sides to be sanded off for a nice smooth transition. If you glue the sheeting to the edge of the sides...
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    The important part is to follow the outline of...

    The important part is to follow the outline of the top view of the fuselage shown on the plans. Yes, it can be difficult to bend the sides in. Soaking them with water/alcohol first helps.
  17. Replies
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    Double post.

    Double post.
  18. Replies
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    To maintain the smooth curve to the spinner. If...

    To maintain the smooth curve to the spinner. If you don't mind the bulges that will cause behind the spinner, leave it as is.

    Jim
  19. Thread: Wing area

    by jrf
    Replies
    26
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    790

    Then all you need to worry about is the long...

    Then all you need to worry about is the long takeoffs and high landing speed. Oh yeah, and the tip stalls on takeoff. or when you make a high speed turn, or when you try to slow down.

    Jim
  20. Thread: Wing area

    by jrf
    Replies
    26
    Views
    790

    The specs for that airplane give a weight of 10.4...

    The specs for that airplane give a weight of 10.4 to 11.4 pounds and a wing loading of 27.85 oz/sq ft. using an engine that is 1.4 pounds lighter than yours. The weight with either one of your...
  21. Thread: Wing area

    by jrf
    Replies
    26
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    790

    Not questioning your measurements, but at 3.15...

    Not questioning your measurements, but at 3.15 pounds, that TT 1.20 is way heavy! For comparison, the OS 1.20 AX, with muffler, weighs 823g (1.81 pounds).

    I guess you could use either one of your...
  22. Thread: Wing area

    by jrf
    Replies
    26
    Views
    790

    When comparing the weights, don't forget to...

    When comparing the weights, don't forget to include the muffler, ignition module and battery. The published weight of most gas engines does not include those. Also, the 120 size airplane may not...
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    Here in the US, anything that is being flown...

    Here in the US, anything that is being flown beyond line of sight is disqualified as a model airplane, and all of the protections passed into law by congress do not apply.

    What is the legal...
  24. Replies
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    First draw a guideline along the center of the...

    First draw a guideline along the center of the trailing edge so that you can sand it evenly and smear some pencil lead along the top and bottom at the leading edge to make sure you don't sand into...
  25. Replies
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    Tapering them makes the airplane fly steadier and...

    Tapering them makes the airplane fly steadier and smoother when the are controls centered. Rounding them makes it hunt when the controls are centered. A good compromise is to not taper them and NOT...
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