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Old Feb 14, 2013, 04:04 PM
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Australia, ACT, Canberra
Joined Dec 2011
390 Posts
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Plane size and weight

Hey all,

I'm kind of a 1/2A rookie and would like to ask a rookie question hahaha.

So i've just picked up myself an AP 061 and an OS 10 and I was wondering if there was a general limit to the size and weight of plane that these would fly successfully.

Like for example would the 061 be ok in a plane that weighed lets say 25oz and a wingspan of say 40 inches (rough figures). I know it depends on the type of plane and how it is to be flown but i'm just trying to get an understanding of the type of plane I should be looking for to fit this to.

Then there's the 10 which i'm sure can handle a slightly bigger bird.

Anyway any advice would be great.
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Old Feb 14, 2013, 05:19 PM
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surfer_kris's Avatar
Sweden
Joined Jan 2008
1,015 Posts
Neglecting all other variables;
25oz and 40" span will be a good sportsize on the .10 engine.
Around 15oz and 28-30" for the .061.
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Old Feb 19, 2013, 12:24 AM
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Australia, ACT, Canberra
Joined Dec 2011
390 Posts
So how do you think this would go with the .061

http://www.hobbyking.com/hobbyking/s...arehouse_.html

And would this be ok on something like a 10 or 15

http://www.hobbyking.com/hobbyking/s...arehouse_.html
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Old Feb 26, 2013, 02:20 PM
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Tel Aviv, Israel
Joined Jul 2004
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i've seen bananas get close to 25 oz and still hand launch and fly with a cox reedy so the .061 would have no problem: http://coxengines.ca/model-airplane-...-standard.html

and moving on, the original version of this plane had a 52"x8" wing and due to lots of repairs and tons of ballast to get the CG right it weighed in at 45oz by the time i finally learned to fly it. power was an enya .11CX which isn't much more powerful than an OS .10...and it flew really nice, was fast and agile...the deadstick glide was fast as well


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Old Feb 26, 2013, 05:45 PM
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United States, CA, Thousand Oaks
Joined Sep 2010
212 Posts
I would shoot for 24 oz. max for anything with a TD .049 or equivalent, and no more than 32--36 oz. for the OS .10. I've designed a lot of models in this size range, and all seemed to fly best if I kept the wing loading to around 12--14 oz. per square foot. Regarding wing area, an .049 can usually deal with 200--275 square inches, while the OS .10 will do better with over 300 square inches. Obviously, airfoil choice and the overall dragginess of the design will be factors.
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Old Apr 01, 2013, 08:18 AM
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Canada, ON, Hamilton
Joined Oct 2005
2,696 Posts
I have a Wild Thing, 36 " span, 350 sq in, 32 oz powered with a Cox .09 (7x4 APC, 15%) that hand launches well and flies great, and another with an MVVS 2cc (.12) at 35 oz.

The lighter, the better.
post # 26
http://www.rcgroups.com/forums/showt...1843370&page=2
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