Jules,
You are right from an idealistic point of view, but cost enters into the
picture. The way we are making the shafts is probably the most cost
effective solution to the problem. I can turn out 20 of these in a day. I
make them out of stainless steel because I am comfortable working with it, I
don't need to worry about rust, and I don't need to send them out to be
plated. The end of the shaft is tapped with flats milled to locate the
bellcrank assembly. We use an 8-32 to re-attach the bellcrank. In the long
run, if we get the flow numbers we want, then I am happy. I try to set goals
and achieve them with the least amount of cost without sacrificing
reliability. I would rather increase the throttle bore diameter (15 minute
operation) then spend hours shaving the shaft (personal preference). My
thoughts.......
Frank
> -----Original Message-----
> From: Jules Glogovcsan [SMTP:jghunter@nol.com]
> Sent: Thursday, November 19, 1998 8:41 AM
> To: dakota-truck@buffnet.net
> Subject: DML: Re: Aero Shafts...? was: TB status (Frank)
>
>
> ----------
>
> >
> > Bridges, Bruce wrote:
> > >
> > > Bob,
> please email Frank. Hes turning the cranks..
>
> > > and a little centerless grinding for the shafts. Not many secrets
> there!
>
> ohh....
>
> Not many [too] secrets there! ... but certainly some....
>
> frank... didn't i see at the site showing the ss tbi shafts a [VERY]
> rounded half-shaft with a flat side to bolt the tbi throttle plate to?
>
> wouldn't this create a laminar flow disruption for a max efficiency
> effort?
> maybe off-idle flow problems...?... wot/part throttle cfms exceed many
> aircraft lift off air speed air flow rates for a particular wing
> desing/airfoil shape... airfoil shape is important here... wouldn't you
> agree? so wouldn't airfoil pressures be compromized... uneven laminar
> flow...? uneven bore pressures... limiting max efficiency efforts...thru
> the port... a split column of air fighting against itself ?
>
> why do you make new shafts... anyway!?! how are the bellcranks
> reattached...?
>
> you are a pilot... [:)] with your own birds... you fly PIC... have you
> ever
> seen a wing with a flat top foil shape...? have you ever seen a wing with
> two humps in it on the top side of the wing's airfoil...?
>
> jam'n
>
> post is not a flame... but only to stimulate thinking... are we REALLY...
> on the right path here?!?... why are we remaking a perfectly good
> shaft...?
>
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