What's the difference between high and low wing loading? - RC Groups
Jul 31, 2010, 11:41 AM
Registered User
Discussion

I'm trying to find how to tell the difference between planes that have a high wing and low wing loading plane.
Could someone give me the name of a 3D plane that has each for an example or what to look for in the specs?

thanks,Robert
 Jul 31, 2010, 01:28 PM I'm no expert, but here's my best explaination. Look for the "Wing Area" in the specs and the AUW (weight with everything ready to fly) which is usually in ounces. The wing area is usually given in square inches, so you take that info and divide it by 144 to get the square feet of the wing. You then divide the weight by the square feet to get the ounces per square feet. The lower oz's per square feet the slower the plane will fly and will have a lower stall speed. For high alpha 3D you generally want as low a wing loading as you can get, even more so if flying indoors. Jet's and sport planes will usually have a higher wing loading and will fly much faster and require more speed to land. Some planes, however, don't give you the wing area, but only the wing width. I just look at the taper and chord (depth) of the wing in that case and get a general feel for what the wing loading might be. I use a very rough formula for my outdoor 3D high alpha (somewhat floater) planes, 2 inches of wing for every oz. of weight max. For example on a 32" plane I shoot for a max of 16oz. For indoor you'd want to shoot for less weight than that (tighter area and no wind), more like a max of 12oz I would guess. Here is an example plane spec: Wing span: 32" Wing chord: 9" Weight: 16oz 32X9=288 sq inches /144 = 2 sq ft 16 oz / 2 sq ft = 8 oz per square foot All things considered this should be a pretty gentle flying outdoor 3D plane, though I would shoot for a lower wing loading for lighter wind conditions. oh, forgot, if the specs are in Metric I convert them to standard. Last edited by WickedFunRC; Jul 31, 2010 at 01:36 PM.
 Jul 31, 2010, 10:17 PM Registered User Thanks,I understand.I have a high wing load on my plane and it doesn't like to do any high alpha flying,it'll hover,knife-edge but it won't harrier upright or inverted. Thanks everyone, Robert
 Aug 03, 2010, 11:48 AM just Some Useless Geek Hang on a sec, goldy. High wing loading is sometimes necessary to make a park jet go fast. Now, roberted5 specifically mentioned 3D, so low wing loading is a Good Thing® in that case. If he wanted to go fast then wing loading wouldn't be so bad, eh? By the way, roberted5, you mention that your plane can hover and knife edge. How is it that you can't get it to do high AoA if you have enough zotz to make it hover? High alpha is dependent on power/weight ratio, not wing loading. At a certain level of throttle you are simply dragging the rest of the aircraft behind the prop. The control surfaces just keep it from moving around on its own.
 Aug 03, 2010, 12:12 PM flyin' fool Wind + weight = No wind + weight =
Aug 03, 2010, 02:14 PM
Registered User
Quote:
 Originally Posted by A Useless Geek Hang on a sec, goldy.
lol, I knew that was coming!

- Jeff
 Aug 03, 2010, 06:34 PM just Some Useless Geek Yah hey der, Jeff. Ya know how them there Canucks are, eh?
 Aug 03, 2010, 07:26 PM flyin' fool Hey, I resemble that remark. Here's more......... Heavy = more amps, shorter flights Light = less amps, longer flight Heavy = must fly faster to stay aloft Light = can fly fast or slow Heavy = more damage on impact Light = laugh at your mistakes
 Aug 03, 2010, 07:40 PM flyin' fool Building heavy is said to be akin To committing an awful sin, And the gods of light Will take much delight, Making your model end up in the trash bin
 Aug 03, 2010, 08:13 PM Registered User wow! hankg thanks I learned something today! I tried my first EDF exceed rc f-18, that thing is high wing loading, since it was my first EDF, I didn't know that you have to land it like a rocket, eased off the throttle, down it goes like a rock.