Roger,
Thanks for the explanation. Obviously I have never had that happen to me,  
although plenty of other firsts have come my way. I also have a Hobie 16 and in  
high winds sometimes I have gone backwards, but apparently the Hobie's twin  
rudders react differently from the R22's.
I usually end up going backwards if I have been to heavy handed on the  
tiller and jam it hard over instead of easing it over in order to keep some hull  
speed.
Rummy