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The World Models 100cc Stearman

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The World Models 100cc Stearman

Old 02-26-2016, 04:40 PM
  #26  
dougflys
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I'm just finishing up my World Models PT 17 Stearman with a DLE 111cc twin. I recalculated the CG and came up with eight (8) inches from the leading edge of the top wing. I'm now in the process of balancing the Stearman and it looks like I'm going to have to add about three (3) lbs of weight to the nose. Does that sound about right?
Old 02-26-2016, 06:23 PM
  #27  
n8622t
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What's wrong with using the cg recommended in the manual??
Old 02-26-2016, 06:24 PM
  #28  
n8622t
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I would think that if you use the mfg cg you don't have to worry about it tight??
Old 02-27-2016, 06:44 AM
  #29  
dougflys
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The manual indicated a CG of 8-1/4 inches from the leading edge of the top wing. I was just checking to insure that was the correct figure. It wouldn't be the first time that the manual was incorrect. Anyway, has anyone completed the World Models 30% Stearman and had to add a similar amount of weight to get it to balance.
Thanks,
Old 02-29-2016, 02:33 PM
  #30  
n8622t
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Editor on RCU actually did a review ..... You should check it out he built it by the manual, if you need one hehehe��
Old 02-29-2016, 02:36 PM
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n8622t
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I've had 3 world models airplanes and the CG was never wrong or inaccurate
hope this helps
Old 02-29-2016, 02:38 PM
  #32  
n8622t
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Still working on mine
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Old 02-29-2016, 03:32 PM
  #33  
n8622t
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I found this one to model
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Old 03-01-2016, 06:11 PM
  #34  
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n8622t...great timing. I just finished the tail and wings and was about to start extending the firebox out for my Evo 260. Please feel free to provide as many detailed pictures as you can. I can't wait to see where the CG will end up with all that weight replacing the thin plastic dummy radial.

Noticed you wrapped the exhaust ring. Is that to protect the cowl or to build heat for the smoke system?Also what material did you use. I was considering header wrap to help with the smoke system.
Old 03-02-2016, 02:27 PM
  #35  
n8622t
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No that's just the plastic film from the original packaging
Old 03-02-2016, 02:37 PM
  #36  
n8622t
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Here's the beginning
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Old 03-02-2016, 02:41 PM
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n8622t
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Firewall extension
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Old 03-02-2016, 02:44 PM
  #38  
n8622t
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I pinned it with 5/16" dowel
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Old 03-02-2016, 02:47 PM
  #39  
n8622t
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Here's the sheet metal work
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Old 03-02-2016, 02:50 PM
  #40  
n8622t
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Strip rudder
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Old 03-02-2016, 02:52 PM
  #41  
n8622t
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Paint cowl and strut fairings
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Old 03-02-2016, 02:53 PM
  #42  
n8622t
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Build panels
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Old 03-02-2016, 09:47 PM
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Very helpful shots. Thank you.
Can't wait to see where your CG comes in.
BTW, what servos are you using?
Old 03-02-2016, 09:47 PM
  #44  
n8622t
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Old 03-02-2016, 09:48 PM
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n8622t
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CG won't change.....
Old 03-02-2016, 09:55 PM
  #46  
n8622t
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I've gone with Hitec 7985 on elevators and 7955 on the rudder. I used some Tower Hobbies CS150 digitals on the ailerons cause I had them and know them to be reliable. Regarding the CG, I will stay with the specified CG location in the manual. Hope this helps
Old 03-03-2016, 10:33 AM
  #47  
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Very helpful. Thank you.
With regards to CG, just wondering if and how much weight may be required to balance at around 8" back. I'm using some fairly heavy servos and batteries well back. Hopefully will not require any nose weight. I'll be doing a quick mock up soon as the extended box is done just to get an idea. A friend who flew it with the CG well forward said that with the extra power, a nose heavy CG is not an issue.
Old 03-03-2016, 11:05 AM
  #48  
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n8622t,

What happened to your big Gee Bee?
Old 03-03-2016, 01:30 PM
  #49  
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Rudder setup
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Old 03-03-2016, 01:31 PM
  #50  
n8622t
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Hello lifer I sold it to a jet guy in Ok City Oklahoma .....6 flights were all I could live with LOL

Last edited by n8622t; 03-03-2016 at 01:33 PM.

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