Bio15 From Colombia, joined Mar 2001, 1089 posts, RR: 7 Posted (11 years 9 months 3 weeks 5 days 21 hours ago) and read 3878 times:
Hi everyone, I was wondering why aren't most wings the same length from the leading edge to the trailing edge (is that is called the chord of the wing?) all along the span. I was making a small model airplane, and I guessed that with more surface area all along the wing but maintaining the same wingspan it would have more lift. My prediction was accurate, and the airplane flew better that the others I made. But why aren't airliners that way?
If it is not clear I'll try and re-explain my inquiry. Thanks in advance!
Buckfifty From Canada, joined Oct 2001, 1316 posts, RR: 19
Reply 1, posted (11 years 9 months 3 weeks 5 days 20 hours ago) and read 3852 times:
Because to hold more weight at the wingtips means the structual integrity of the wing inboard would have to also increase. Having a tapered wing can reduce the amount of strengthening required, and thus reducing weight.
Broke From United States of America, joined Apr 2002, 1322 posts, RR: 3
Reply 2, posted (11 years 9 months 3 weeks 5 days 20 hours ago) and read 3842 times:
In addition, the lift generated by the wing would be greater on the outer wing panels; resulting in larger moment force causing the wing to try to bend upward more.
But, on many light aircraft the wing chord (straight line distance between the leading edge and the trailing edge) length is constant. This is done to reduce the cost of construction by being able to use the same ribs throughout the wingspan. On these aircraft, the moment force on the outer wing panels is not that great due to the lower speed of these airplanes.
There is one airplane, that I know of, that has inverse wing taper; where the wing chord length is greater at the tip than at the root. It is the Republic XF-91 and the reason was to test the concept that reverse taper might counteract the tendency of the airflow on a swept wing to go spanwise and not chordwise. I don't think it helped. If you want to see what the XF-91 looked like, go to;
Bio15 From Colombia, joined Mar 2001, 1089 posts, RR: 7
Reply 4, posted (11 years 9 months 3 weeks 4 days 15 hours ago) and read 3633 times:
Hi MITaero, I see what you mean about making an elliptical wing vs. making a 'regular' wing. I'm not very familiar with the term "tapered". What does it mean strictly? And what does the taper ratio indicate? I appreciate your response!