Yes, the wing area changes depending on whether you have the extended wing tips or not:
http://www.n91cz.com/Interesting_Technical_Reports/Lancair%20Brochure-RDM-small.pdf
See the (next to) last page. The extended wing tips add about 2 feet to each wing span. It doesn’t give the wing area for the extended wing tips, but it shows 19 lbs/sq ft for the extended wing tips and 22.17 lbs/sq ft for the standard wing tips which approximates the math we’ve seen.
Note that my copy of the Lancair POH states that aerobatics are not recommended with the extended wing tips.
-Rob
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Tom
Sent: Tuesday, May 28, 2013 4:58 PM
To: lml@lancaironline.net
Subject: [LML] Re: Lancair Aerobatics
I have seen the 19lb/sq ft number quoted in at least 2 places but as grayhawk points out the math does not work out. I have also seen the wing area quoted as 78sq ft. In addition, on a long trip with my wife I am always 1800# where I certified the aircraft. That puts me in the region of 26lb/sq ft. Anybody have the "real" wing area and insight to why 19lb/sq ft turns up in the literature?
320/370 wing area = 70 sq. ft. Avg operating weight of 360 = 1600 lbs. Wing loading = 22.857142857142
PS Quad Cities Challenger II = 5 lbs/sq ft. - exciting in turbulence.
In a message dated 5/28/2013 12:38:45 P.M. Central Daylight Time, cwfmd@yahoo.com writes:
Airframe Wing Loading
Cessna 150/172 10.5 traffic pattern hazard!
Pitts S2 13
RV8 15.5
Lancair 360 19
Lancair IV-P 36.2 !
Internet poll- not scientific or stat signif |