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I find the tie quite interesting, and also believe it is a key piece of evidence for the case.

Based on the spiral aluminum chips and pure titanium particles in Cooper's tie, he probably isn't a banker, baker, carpenter, insurance agent, or a host of other professionals.  If you believe the tie belonged to Cooper, and believe the Citizen Sleuth conclusions that he is an engineer in a specialized metal-working facility, then we have just drastically limited the field of suspects.

The cigarette brand he smoked, and whether or not he smoked on a regular basis, is not nearly as important as his profession and place of work.

In my book, I lean heavily on the fact that Cooper is an engineer.  He is intelligent, inventive, and meticulously plans this hijacking.  When you view the case from this perspective, all of the "mysteries" and conundrums are gone.  We are only left with who is Dan Cooper and where is he now?

Then you have actual evidence he is an engineer?  Please share your test results.   

pst*   Was Cooper a Cuban engineer? Does this elbow and forearm fit your profile? (shown below)

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I find the tie quite interesting, and also believe it is a key piece of evidence for the case.

Based on the spiral aluminum chips and pure titanium particles in Cooper's tie, he probably isn't a banker, baker, carpenter, insurance agent, or a host of other professionals.  If you believe the tie belonged to Cooper, and believe the Citizen Sleuth conclusions that he is an engineer in a specialized metal-working facility, then we have just drastically limited the field of suspects.

The cigarette brand he smoked, and whether or not he smoked on a regular basis, is not nearly as important as his profession and place of work.

In my book, I lean heavily on the fact that Cooper is an engineer.  He is intelligent, inventive, and meticulously plans this hijacking.  When you view the case from this perspective, all of the "mysteries" and conundrums are gone.  We are only left with who is Dan Cooper and where is he now?

Then you have actual evidence he is an engineer?  Please share your test results.   

pst*   Was Cooper a Cuban engineer? Does this elbow and forearm fit your profile? (shown below)

He didn't say he had evidence that Cooper was an engineer. He said IF you believe he was an engineer then the field of suspects is drastically narrowed.

I'm noticing a disturbing pattern in this thread with your posts.

I want to see if Norman's shop might be the source of the TieTanium, Bismuth, Aluminum etc. If Norman's chutes picked up those metals from being carried though his shop, Cooper's tie might have picked them up from handling Norman's chutes.

Why not test the rig that's at the museum? See if has a metals content similar to the tie.

Many assume that the tie metals are from the tie owner's workplace. That might not be true.

377

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I find the tie quite interesting, and also believe it is a key piece of evidence for the case.

Based on the spiral aluminum chips and pure titanium particles in Cooper's tie, he probably isn't a banker, baker, carpenter, insurance agent, or a host of other professionals.  If you believe the tie belonged to Cooper, and believe the Citizen Sleuth conclusions that he is an engineer in a specialized metal-working facility, then we have just drastically limited the field of suspects.

The cigarette brand he smoked, and whether or not he smoked on a regular basis, is not nearly as important as his profession and place of work.

In my book, I lean heavily on the fact that Cooper is an engineer.  He is intelligent, inventive, and meticulously plans this hijacking.  When you view the case from this perspective, all of the "mysteries" and conundrums are gone.  We are only left with who is Dan Cooper and where is he now?

Then you have actual evidence he is an engineer?  Please share your test results.   

pst*   Was Cooper a Cuban engineer? Does this elbow and forearm fit your profile? (shown below)

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Bill Rollins:  You say "In my book, I lean heavily on the fact that Cooper is an engineer.  He is intelligent, inventive, and meticulously plans this hijacking.  When you view the case from this perspective, all of the "mysteries" and conundrums are gone.  We are only left with who is Dan Cooper and where is he now?"

DB Cooper/Sheridan was not an engineer but a writer in the "Handbooks and Manuals Group" at Boeing but the rest of what you say is true about him. He found out all he needed to know about the 727 aft airstairs there where we even had a working Engineering Mock-up of the stairs attached to the 727 Flight Controls Test Rig that he had available to watch it work. He even had the Mechanical Engineers that designed the stairs available on the phone.

Bob Sailshaw
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If Sheridan is Cooper, then I am okay with that.  However, there were some strange metal combinations, like pure titanium with 400 series stainless steel.  Doesn't sound like an aircraft combination, probably more like a chemical plant application.

I also believe Cooper has endured a major loss, and is in deep despair.  He probably has a grudge against our government, and he is willing to die to make his point.  For me, this entire caper is based on "not letting the government get away with murder".  The money holds no real value to Cooper, other than it frustrates the FBI when they can't recover it.

As I have also stated, I believe Cooper had an ingenious plan, and I have discussed his "escape via boat and the Lewis River".  I have a high degree of confidence that this is what transpired on the night of November 24, 1971. 

Of course one question that always comes up, where's the money?

Between eye witness verification, the metals on the tie, and having possession of the money, no suspect considered to date seems to fit the bill.  An opinion that seems to be held by the FBI as well.

Wouldn't that be something, eh, Vicki?

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Would the combination on the tie be consistent with printing in the late 60's? For instance, offset presses or hand engraving metal printing press plates.

I am not familiar with the printing business, however, titanium is an expensive metal.  It is utilized in the aircraft industry in its alloyed form because it has a high strength-to-weight ratio.  This is important for aircraft.

In 1971, the pure titanium was not utilized, except apparently for chemical plants where corrosion was a concern.

My guess, again, just a guess, is that there wasn't a need for the pure titanium in the printing/engraving business, as there are many less expensive metals that can probably work satisfactorily.

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I found this information from a patent in 1963. The link is available here: You are not allowed to view links. Register or Login

Here is a short passage from the patent:
In general, any conductive electrolyzable metal can be used for purposes of this invention, such as copper, vanadium, zinc, bismuth, cadmium, titanium, silver, nickel, and the like. Preferably, the metal is dark in color for contrast; however, if readout of the image is to be made by other than optical viewing, such as by electronic readout or the like, even very thin, non-optically contrasting metal films are useful. Preferred metals for the purpose of the invention are cobalt, titanium and vanadium.

I did a cursory review of the patent.  It is quite interesting.

Note that the list of conductive metals is there to protect the patent holders right to exercise numerous options.  However, if you read down to the claims (the important part of the patent), they seem to be most interested in vanadium (4. A copy sheet according to claim 3, wherein the said light-transmissive metal is vanadium).  6. A copy sheet according to cliam 5, wherein the nucleating metal atoms are nickel, and the light-transmissive film is vanadium.

So although titanium could work in this application, it appears that they favored vanadium.