Wing load/area questions. (Full Version)

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ger87410 -> Wing load/area questions. (3/18/2003 10:12:02 AM)

I was given this pattern plane by my father which was given to him by somebody at the flying field, and I know absolutely nothing about it. From what I gathered it has a wing area of about 897.75 Square inches and the fuselage is somewhere around 47" long. It did not come with the wing that was designed for it, but one that fits real nice. Is this the correct wing area to fuselage size? What is the maximum weight for this craft? Any help would be sppreciated.
Gerald



MarkD -> Wing load/area questions. (3/18/2003 11:03:09 AM)

What is the wing span? A lot of the modern FAI/pattern planes have a fuselage almost as long as the wingspan, if not a hair longer. The older designs were generaly a bit shorter, something around 75% of the wingspan. If you have a picture to post it would help.

MarkD



skylane42 -> Wing load/area questions. (3/18/2003 12:25:18 PM)

thats alof of wing area for that fuse. a Sweet Stick has a 55 inch wing span and 600 sq in of area. I don`t know off hand how long the fuse is but it is shorter than the wingspan. Your wing loading is going to be real low so it will be a floater.



ger87410 -> Wing load/area questions. (3/18/2003 6:56:45 PM)

Here's some quick low quality pictures. The fuse is 46" long, 42.5" not including the stabilizer and elevator fins, and the wing is 63"x14.25". It's definitely a fixer upper. I estimate the completed weight to be 5-7 pounds with the engine and stuff since it weights 4.5 pounds now. I just got it and don't plan on starting on it till after Kim and my wedding. I'm surprised how fast you people reply. If I knew that you people were this helpful, I would have joined sooner. It's in zip format. Everybody should have winzip. So do you think this beast will fly?



buzzard bait -> Wing load/area questions. (3/21/2003 11:43:15 PM)

Main issue is not whether the wing is the right size for the fuse (some planes have no fuse at all), but whether you have enough stability in pitch and yaw, especially pitch. If the fin and rudder look about right they will probably do. But if the stab is very small and close to the wing then you will need a very forward balance point in order to have enough stability in pitch. There is a formula relating wing area, stab area, chord, and tail moment arm to balance point.

Your weight is good for that area.

I can't see the picture and have no idea what winzip is. Jim



ger87410 -> Wing load/area questions. (3/24/2003 7:21:44 AM)

For people who don't have winzip, goto winzip.com and download the evaluation version.



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