One of the things we had to do during my flight instructor training,(23 years ago) was to write a list with 10 factors affecting the stall speed of an airplane.. .. .Don't remember half of the list now, but perhaps this is a good place to review the list.. .. .A few factors are listed above:. .. .1) Weight. .2) C.G.. .3) G loading . .. .Also. .. .4) Contamination of wing (Ice). .5) Power. (On or off). .. .Etc.. .5 more guys?. .. .Question: When is the stall speed zero?. .(In the air, not on the ground). .First correct answer wins a price. <img border="0" title="" alt="[Wink]" src="wink.gif" />