i must get that book but off hand i would say the didion setup as is causes the trouble.as we see it is the same problem with the four or six.i suppose a diffrent rear setup instead of that triangle may be the answer.
--- On Tue, 2/2/10, Jerry in Arizona <[email protected]> wrote: From: Jerry in Arizona <[email protected]> Subject: [alfa] Those Troublesome Guibos To: "Alfa Digest" <[email protected]> Date: Tuesday, February 2, 2010, 11:32 AM George Graves wrote; > "If you're building a car from scratch that will have a shortened drive > shaft, why use the Alfetta drive shaft and Guibos AT ALL? I'd fabricate a > torque-tube (which Alfa SHOULD have done with the Alfetta design in the > first place) and dispense with the troublesome guibos." I have seen many other references to this issue, so going to my extensive library of Alfa related items made up of one book, given to me by my once teenage son, I took out my copy of Alfissimo by David Owen. Owen discusses the myriad of problems brought about by the decision to move the trans and clutch to the rear in the Alfetta. The original and traditional Alfa prop shaft design used in the models no had severe destructive resonance problems cause by caused by differing rotastion massses and the prop shaft always turning at engine speed. The original prototypes could not manage more thas 6000K without the likelihood of the overloaded crankshaft being shaken to pieces by the vibration. Through a slow and patient development process: the rear prop shaft was ultimately split into two seperate sections, linked by 3 rubber couplings to damp out the vibrations. My point being the decision was made rationally and for sound engineering reasons. Not to pick on George, but hs remarks just kind of reminded me of this discussion in Owens book. Using the Alfetta DeDion in another application could, of course, change the vibrational dynamics of the vehicle (different masses, size, weight or materials of the prop shafts) allowing a different configuration. Jerry in Phoenix -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected] -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
