Hi all,
I am doing some research for a local inventor who has some fuel vaporisation
patents. Do any of you know about this technology? I especially want to know
why it has not been adopted commercially (despite many patents being owned
by car companies.) My friend here, Dr. Kulasinghe, has retrofitted his flash
vaporisers to many petrol cars and diesel generators here with great results
(about 40% les fuel) but there must be a catch. I don't believe the big
conspiracy theory that kept coming up on web searches. Any ideas? Please
reply directly as this is not tiger related.
Thanks for any help, Derek
Derek White
37/2 Buller's Lane
Colombo 7
Sri Lanka
Tel: 94 1 581175
Cell: 94 777 475955
-----Original Message-----
From: owner-tigers@autox.team.net [mailto:owner-tigers@autox.team.net]On
Behalf Of bmelusky@netscape.net
Sent: Monday, October 14, 2002 5:59 PM
To: Steve Laifman
Cc: tigers@autox.team.net
Subject: Re: Surfire way to tell a 289 HP block
Steve Laifman <SLaifman@SoCal.rr.com> wrote:
>
>few small dimples on it from the tests. Much like a fine point, spring
>loaded center punch. Of course it was a much more sophisticated piece of
>equipment, but the depth of penetration with a preset impact is what the
>criteria is for hardness, which equates to the crank tensile strength
>from heat treat.
>
>Steve
>
A Brinell test uses a fixed load (in this case 3000 kg) and a 10 mm ball.
The surface is ground primarily to give a clean edge to the impression, but
it is also desireable to remove any decarb (metal that had the surface
carbon depleted) that would skew the results. The impression is measured by
a small 10X scope with a reticle. The size of the impression determines the
hardness. This is the preferred method for high nodular cast iron (or
ductile iron) such as used in the Hipo crank. Nodular iron is made by
pouring the material over magnesium to create spherical graphite instead of
long flakes typical of gray iron. For those that are curious here are some
microstructures: http://www.metallography.com/technotes/iron/nodular.htm
As you can see from the photomicrographs, the material is not homogeneous,
so a large ball is desireable to get a representative reading. Ductile iron
is superior in strength and can take higher loads over gray iron. It is
rated by the number of nodules, and the precentage of ferrite (weak) versus
pearlite structure(desireable for strength).
A Rockwell type test would be a small prick punch impression. Harder
material would require a diamond indentor and softer material would
generally use a 1/16 inch ball penetrator, although I have seen special
penetrators up to 3/4 for some coatings. A small indent is generally not
suitable for cast iron, given its varied structure. Rocwells measure depth
of penetration and neither test uses impact, as impact can cause work
hardening and change the results. For both tests the rate of load
application and duration are important parameters to assure repeatability
Probably more than most want to know, but there it is.
Melusky
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