Paul, still haven't been able to receive e-mails from your newsletter very disappointing for me. I'll call my cable provider tomorrow and find out why. I have however been getting responses about the titanium studs through my friend Doug Mueller. I read an interesting response about notching.
Vance W Jaqua wrote:

Titanium is notorious for notch sensitivity - For bolts, both titanium

and

aluminum are considered
high risk desperation -Vance

I was wondering if Mr. Vance could elaborate more as to which titanium he was referring to? Before we dismiss the use of the studs all together, it seems a little quick to judge without knowing of all the properties from the over 30 different types of titanium. I have found a wonderful web site that I would like to share with all of you that can tell you all about every type of titanium and all of its properties with all the numbers you can crunch.
http://www.aerospacemetals.com/titanium.html#top

  Please understand that I mean absolutely no disrespect to you or the group. I believe you are providing a wonderful and much needed service that will benefit aircraft owners and racers alike. I know you and Mr. Vance are a lot smarter than I am. But, I felt as though we should look at this a bit longer before we throw the idea to the scrap yard. One other question I have is. If titanium is not the material to use what is ?

                       Respectfully, Tony

Good question. One of the steels obviously. Starting with 4130 heat treated,
shot peened and rolled threads.  Perhaps 4130 is not optimum. Also you want
to make a distinction between a bolt and a stud. A bolt has exposed threads
unlike a properly installed stud. Makes a difference if you are putting
a bending load on the stud or bolt. The bending loads come from the long
bolt vibrating in the over size housing bores. 

Paul Lamar

 
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