stankap
Member
Guys,
I'm building a one off design, standard low wing all aluminum aircraft. Right now I am playing around with AR vs. section depth. Here are some preliminary figures:
Empty 450~500lb
Gross 730~775lb
Wng section USA 35B
Wing Size:
(option 1) 3.50' chord x 21.28' span = 74.5ft^2 AR = 6.08 Section depth 5.02"
(option 2) 4.25' chord x 17.50' span = 74.4ft^2 AR = 4.11 Section depth 6.09"
Looking at Hummelbird plans and Davis DA-2A/DA-5 plans I see two different spar construction techniques, but I'm wondering if it is better to go with:
(option 1) shallow section/ large AR (more complicated spar buildup)
(option 2) deep section/small AR (simpler spar buildup)
This all has to do with complexity of spar construction vs aicraft performance (AR), vs wing weight.
Some informative discussion from the more advanced aircraft designer members is requested (please).
Thanks,
Stan
I'm building a one off design, standard low wing all aluminum aircraft. Right now I am playing around with AR vs. section depth. Here are some preliminary figures:
Empty 450~500lb
Gross 730~775lb
Wng section USA 35B
Wing Size:
(option 1) 3.50' chord x 21.28' span = 74.5ft^2 AR = 6.08 Section depth 5.02"
(option 2) 4.25' chord x 17.50' span = 74.4ft^2 AR = 4.11 Section depth 6.09"
Looking at Hummelbird plans and Davis DA-2A/DA-5 plans I see two different spar construction techniques, but I'm wondering if it is better to go with:
(option 1) shallow section/ large AR (more complicated spar buildup)
(option 2) deep section/small AR (simpler spar buildup)
This all has to do with complexity of spar construction vs aicraft performance (AR), vs wing weight.
Some informative discussion from the more advanced aircraft designer members is requested (please).
Thanks,
Stan
