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United States, IL, Chicago
Joined Nov 2007
100 Posts
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Ready to pull the trigger on an Osiris order. Just for fun, I put the A50-12L, 5S-4000, and 16x10 into the eCalc web tool. The max current comes out at 35A and max power at 620 W. This seems way low compared to what everyone described. What am I doing wrong?
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Frontenac, KS
Joined Jan 2003
265 Posts
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If you go with A50-12s & 5s, try 16x10E for normal flying.
On strong wind day, I use 16x12E cut down to 15.25x12 (approximately 10mm cut off on both sides) Pulls about 73 amp. A lot better than 15x10 with broad range of speed. 30% brake seems to work well on down line. Check the Horizontal Stab incidence before gluing. Set it to 0 or parallel to the fuse top. It wil be a better flying plane. |
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Good tip on the stab incidence, thanks! I find it hard to believe AJ's setup is not optimal but it is too late now, I got the motor and prop he recommends in his video. I also got a couple GensAce 30c 5s 5300 packs and they are amazingly light and compact. And Johnnyrocco I can't believe you swapped your avatar, I was just going to get my picture taken playing my guitar! Ah well, cool heli though
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Missouri
Joined May 2010
36 Posts
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The Osiris is a nice flying pattern plane but you need to check the incidences of the wing and horizontal stab. Mine needed adjustment out of the box.
PatternFlyer helped me with suggestions for the incidences. Zero incidence for the horizontal stab and +.5 for the wings. Once I made the incidence adjustments very little trimming was needed. I set the CG at 7 inches as recommended by AJ in his video. |
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Quote:
I saw no need for any mods. |
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Frontenac, KS
Joined Jan 2003
265 Posts
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it is not a modification, it is a correction.
Not just myself. there have been more than a few guys with 62" Osiris ending up with up trim after building the plane following the manual. mine came out with positive stab incidence of more than 1 degree which is not good at all. So, I helped another member building the Osiris with 0.5 negative incidence relative to the wing. This is almost at 0 relative to the top of the fuselage with out canopy. almost no elevator trim. Stab tips are not in parallel also. so taping the elevator halves to the tip comes out with elevator halves not in parallel. I re-hinged both sides. |
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