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Type: Posts; User: MJD

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  1. Replies
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    Nice, looking forward to the flight report. The...

    Nice, looking forward to the flight report. The stock .010 prop is outdated by the ability to build compact 3.5 oz RC models.
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    Looks like it should be lots of fun at that...

    Looks like it should be lots of fun at that weight. The .010 seemed to lose 700-800 rpm top end over the course of the run. How was the heat on that prop?
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    What is the green prop? Looks like a lekkie prop,...

    What is the green prop? Looks like a lekkie prop, ooh the safety police will get you for spinning it slower than an electric motor can..
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    Hmm, that looks like a .15 Shrike.. :) Does...

    Hmm, that looks like a .15 Shrike.. :)

    Does the description get any better? "A fun airplane". Love it.
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    I am not sure of the spread on the pipe response....

    I am not sure of the spread on the pipe response. It staged on the ground run yesterday without distress, needled easily, and ran cool enough. But it recorded 30.5k on the pitchless bench prop and...
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    I was debating between stiff 1/8" or 3/16" for...

    I was debating between stiff 1/8" or 3/16" for the tail group. I went 1/8".. once it is anchored to the fuse it should reveal if more torsional stiffness is needed.

    So far I have only used the...
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    I suited up against some cool winds today, had to...

    I suited up against some cool winds today, had to bench run the MDS .15 with the mangled bent pipe. Responding to taunts from fellow RCU members to run it with a flight prop, I made a 5.5x5 from an...
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    Cool, 56LX info now. I'm kind of surprised at...

    Cool, 56LX info now.

    I'm kind of surprised at the similarity of the .35 BSE FISE to the 50 BSE FISE. 0.3oz difference and they turn a 10-6 at the same rpm.
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    He's running a 2 blade prop here, I was...

    He's running a 2 blade prop here, I was surprised, about 4x4. For competition says he has single blade with about 6" pitch ready. Not sure why you would want that much when the target speeds are...
  10. Replies
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    These guys are Profi - they ought to know how to...

    These guys are Profi - they ought to know how to set it up. Yeah, it sure seems eager to stage, yet it sounded pretty healthy all through the run. Tank shims and all that.. great stuff.
  11. Replies
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    My Profi F2A came with the 0% and 10% nitro head...

    My Profi F2A came with the 0% and 10% nitro head buttons. I think you speed fliers generally know these things, but I am surprised to realize how many parts fit across brands.. but I suppose the...
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    I was surprised to find out how long the good F2A...

    I was surprised to find out how long the good F2A engines last - many, many runs (unless bad things happen of course..). Bill H mentioned his best run on one engine was on something like flight #60....
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    If I don't finish mine this winter and be ready...

    If I don't finish mine this winter and be ready for some jet antics come May 24 weekend, I will be very ashamed.. :(

    I'll shoot some pics of the motor mount arrangement and tailpipe mounting,...
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    Mid 80's.. wow, how old are you now? :rolleyes: ...

    Mid 80's.. wow, how old are you now? :rolleyes:

    Those little buggers move, 1/2A proto speed looks like good fun.
  15. Replies
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    The F2A speed trainer article you can find...

    The F2A speed trainer article you can find through NASS mentions that best speeds on that model were with around a 5.5 x 5 with some blade area:



    Propeller. The best speed was achieved with a...
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    I agree, but I am not going for an optimum...

    I agree, but I am not going for an optimum solution, nor do I expect this thing to have good manners. This is a quick and dirty conversion only. I am not sure the .10 size would perform on the tiny...
  17. Replies
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    Nice! Hard to say if all the qualities that...

    Nice!

    Hard to say if all the qualities that make this an old favorite are really going to be allowed to showcase themselves with this gross mutation.
  18. Replies
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    Yeah, quite close. I get 16%.. chances are it's a...

    Yeah, quite close. I get 16%.. chances are it's a NACA 2416. Not too thin is it.. oh well.

    UPDATE: no it's not a NACA 2416, might be a Staedtler-Mars special based on one, dunno. I smoothed out...
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    No it is stock from the firewall back - just an...

    No it is stock from the firewall back - just an optical illusion. What may be fooling you is the 1 inch I lopped off the nose last night, the parallax error holding my iPhone up in the air, and the...
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    p.s. Missed your question, I'll measure up the...

    p.s. Missed your question, I'll measure up the pipe and let you know.

    The airfoil looks funky in the pic, but the paper is a bit mangled in that area. The airfoil thickness is definitely not...
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    The bend worked fine, I'll bench run it soon as...

    The bend worked fine, I'll bench run it soon as it's hospitable enough. However - tech tip: don't fill the pipe all the way. I got this technique from brass instrument making techniques, but those...
  22. Replies
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    It's the same pipe that ran 30.5k on the bench...

    It's the same pipe that ran 30.5k on the bench prop. The stock MDS pipe was 2.5-3k below that. This is a used Profi F2A pipe, I froze water in the header section and tweaked it to clear the fuse....
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    Kit sacrelige.. Bad Baby Birdie mutant

    ..but don't worry I am drawing up the model as I go. And I plan to pull a mold or at leasy a plug from the canopy. So the 1/2A version can be repro'ed.

    I had it set up in the front end for a...
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    Probably just mine then. I guess I could have...

    Probably just mine then. I guess I could have moved the fins to the bottom, round the bottom of the engine mount flat and flown it upside down.
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    Check the wing for twists too. I never built...

    Check the wing for twists too. I never built mine, put it aside when I realized both tips had permanent wash-in.
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