Can you get a manual for the Wattage Ultimate?
Check this thread:
http://www.rcuniverse.com/forum/m_88...tm.htm#8868318
Posts #10 and #12
You also need to consider that the wings are swept back; hence, you need to determine the media chord (MAC):
http://www.rcuniverse.com/forum/m_36...tm.htm#3651709
Regards!