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Author Topic: OS 46 LA limits  (Read 1937 times)

Offline Casey

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OS 46 LA limits
« on: November 13, 2014, 10:37:55 AM »
Is a full fuselage 60 inch wing span 705 square inch 56 oz plane too much for an OS 46 LA to haul around for a full schedule? If it not, what should be the maximum line length?
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Offline Steve Helmick

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Re: OS 46 LA limits
« Reply #1 on: November 13, 2014, 10:35:50 PM »
More to it than area and weight...airfoil thickness and drag in general. Do you want to use CF props and run 20% nitro? Etc.  D>K Steve
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Online Howard Rush

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Re: OS 46 LA limits
« Reply #2 on: November 14, 2014, 11:03:34 AM »
Quote from: Steve Helmick on November 13, 2014, 10:35:50 PM
More to it than area and weight...airfoil thickness...

What does airfoil thickness do?  Show us some data.
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Offline Tim Wescott

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Re: OS 46 LA limits
« Reply #3 on: November 14, 2014, 11:09:57 AM »
About two years ago I asked "what's the best plane size for an LA 46".  The consensus seemed to top out at around 630 to 650 squares.

http://stunthanger.com/smf/index.php/topic,31124.0.html

If you built really light, you may be able to struggle through the pattern in light winds with a bigger plane -- but why?
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Online Dave_Trible

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Re: OS 46 LA limits
« Reply #4 on: November 14, 2014, 12:05:19 PM »
About  airfoil thickness,  never had much luck doing eights with a rat racer.  I'd think your .46 would be hard pressed to pull that much airplane effectively.  That motor is nice but more like a .40 in power output.

Dave
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Offline Jim Thomerson

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Re: OS 46 LA limits
« Reply #5 on: November 14, 2014, 02:39:01 PM »
That was my Humongous except 52 oz.  K&B 4011 flew it just fine.  I suspect a K&B 4011 is a more gonzo engine than a LA 46, but have no comparative data. 
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