I just got done installing a root fairing on a 750  . I had noticed  some weakness in the sheet metal along the curve on it and also on others 750s and 701s , I have also seen some root fairings with lots of dimples and waves  . A few have developed small cracks from the oil canning of this area.  Thought I would show what I had done on this 750 and can easily be done on other 750s or 701s

I just marked a line down the center of the fairing panel and started about 10mm from the spar . Layed out a 40mm spacing and pre drilled the holes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

cut an L angle to length  and crimped the contour on top of  the skin

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

marked a center line , predrilled the first hole and then the rest was easy. I did have to un cleco the back section of the root fairing to get access

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

really stiffens it up

I have done this in between ribs on a 701 but with the 750 haveing the horizontal stiffners runing down the length of the wing, I dont think its really needed on a 750

 

Tracy Buttles