Thank you for the information. The part came from the factory already drilled at slightly less than 2x and the right strut that does fit has the bolt hole closer to the edge. I’m hoping to find out if there is a minimum that I may file the upper tab to. KitFox is closed for a well deserved rest for the holidays.

Quote Originally Posted by Dave S View Post
Rene,

Just a few thoughts

2X seems to be the industry standard for edge distance, also reflected in FAA documents, usually with respect to rivets. I think that can be agreed on, although there are some lesser amounts that have been used as you indicated.

One point to consider is the over-reach does not affect the lower tab, just the upper tab.

Another consideration is that normally where three edges (through a 180 degree arc) are considered, there is little reason to have any of the three edges wider than the least of the three - like the sides compared to the end of the tab - the closest edge is the weakest link anyway. If the sides are less than 2X, simply radiusing the tab to agree might be an answer.

Others with a more extensive engineering background and kitfox experience might be able to provide a stress analysis and determine if the part would perform ok with a little addittional material removed, beyond the 2X factor.

Any doubts, I would call up Kitfox, I have always found they are the experts on design and tolerances of the aircraft.