Newsgroup sci.engr.mech 27949

Directory

You can find now  new areas & links in my List of CIVIL ENGINEERING RESOURCES:
-----------------------------------------------------------------------------------
http://www.geocities.com/CapeCanaveral/4378/links.htm
-----------------------------------------------------------------------------------
Classified by: 
	Universities
	Associations
	Official Centers
	Research Centers
	Transportation
	Highways
	Railways
	Ports
	Structures 
	Hydraulic
	Construction and Companies
	Construction Materials
	Soils, Geology, ...
	Environment
	Software (CAD,Aplications for engineering, ...)
	Publications
 ... and more areas in next months like Surveying,  ...
And You can visit  too my  Civil Engineering Site (Principal Page) at:
-----------------------------------------------------------------------------------
http://www.geocities.com/CapeCanaveral/4378/cis.htm
-----------------------------------------------------------------------------------
This page is a meeting point of Civil Engineers, Constructors, ...  around the world.
You can find here many information related to civil engineering: 
1) A great list of civil engineering resources classificated by areas:
2) The first (or one of the first) virtual publications of Civil Engineers made in Spain.
     (in english version too!). A place where you can contribute with your opinions, ideas, 
     experiences, questions, .... 
3) My own pages dedicated to Civil Engineering studies in Madrid (Spain) at Polytechnic 
    University. "Escuela Tecnica Superior de Ingenieros de Caminos, Canales y Puertos".
     History, Departments conected to Internet, Courses, ... (Only in spanish by now).
I hope you like them.  
------------------------------------------------------------
                 Greetings   from   Spain
------------------------------------------------------------
 Oscar Hurtado Albert
 Email: oscarhur@ran.es
 Madrid (Spain)
------------------------------------------------------------
 My Civil Engineering Site:
 >>> http://www.geocities.com/CapeCanaveral/4378/cis.htm 
------------------------------------------------------------

Are there any standards for belts and splined shafts?
I have a belt and a splined shaft. I need to specify a pulley
that will fit on the shaft and drive the belt.
Examining the Grainger's catalog, belts are referenced
type "N" and such. I suspect that there must be some
SAE or ASAE standard for splined shafts, eg. 1.25 in. O.D., 19 splines,
etc.
-- 
Charles R. McCreary, P.E.
CRM Engineering Services
4520 Norwich Dr.
Fort Worth, TX 76109
Voice:  817.924.9244
Fax:    817.924.8802
Email:  mccreary@dfw.net

In article <01bbc3ad$542526a0$1ffdf9c8@panselmo.truenet.com.br>, "Pedro
Anselmo Filho"  wrote:
>I need some help with which standards I should consult for design a
>Pressure Vassel.
The ASME Boiler and Pressure Vessel Code is better than most and as good
as any. Make sure you follow the fabrication requirements as well as the
design rules.
Christopher Wright P.E.    |"They couldn't hit an elephant from
chrisw@skypoint.com        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)
http://www.skypoint.com/subscribers/chrisw

In article <32712CE0.7F3F@dfw.net>, "Charles R. McCreary P.E."
 wrote:
>Are there any standards for belts and splined shafts?
>I have a belt and a splined shaft. I need to specify a pulley
>that will fit on the shaft and drive the belt.
You might want to get hold of a copy of Machinery's Handbook. There's a
good section on V-belt design and specification.
Christopher Wright P.E.    |"They couldn't hit an elephant from
chrisw@skypoint.com        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)
http://www.skypoint.com/subscribers/chrisw

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
My husband keeps showing me all of this discussion.  I believe it time for me to render 
my professional opinion regarding the engineering profession and licensing.  
1.  Practice - Most states have a practice act (versus a title act) and give the 
engineer a license to practice, just like a doctor.  The purpose of the law is to 
provide a minimum standard of proficency that will protect the health, safety and 
welfare of the public.  Its not a guarantee of how people will perform once they have 
that license.  Texas was the last state in the Union to require the NCEES exams and made 
that change in 1992.  
2.  Exams - The standardized test is supposed to measure a depth and breadth of 
knowledge and experience and again is a minimum baseline.  Texas is a state that 
licenses engineers without specific regard to which discipline.  It is up to the 
professional to practice only in those areas of education and experience.  The test is 
attractive enough that Mexico (thank you NAFTA) and Japan are both interested in 
utilizing these exams.  NCEES is always on the lookout for good problem writers for 
those of you who think the test needs improvement.    
3.  EIT - For those wondering what to call themselves just out of school and with the 
EIT behind them, it depends on your state.  Many states are still using the 
Engineer-in-Training (EIT) designation and some have changed to Engineer Intern 
believing it sounds more professional.  I was proud to have my EIT and framed it and 
hung it in my office until I received my P.E. 
4.  Industrial exemption - This issue more than any other may be the demise of 
engieering as a profession.  No one would dream of exempting doctors or lawyers from 
their licensing requirements because they worked say for a corporation or the 
government.  And since so many people in those exempt industries use engineering titles, 
the public does not recognize the difference.  If you work for an exempt industry, are 
downsized and then offer your services back to that company (not directly on the exempt 
company payroll), you have just become a consultant and are no longer exempt.  Also, if 
you do work in an exempt industry and are licensed as a professional engineer, you are 
supposed to be sealing and signing engineering work that goes out of the company (at 
least in Texas).  I know, I work for the Federal government.  And even though my 
employer may not require it, the Texas law does.  
5.  Sealing engineering work - One of the messages stated "most of my work is never 
sealed because I rarely do design work".  I hope you have a recent copy of the Texas 
Engineering Practice Act.  Please read Board Rule 131.138, 9.  For those of you who do 
not have a copy of the law it it states:  "The engineer shall sign, seal, and date the 
original title sheet of bound engineering reports, specifications, details, calculations 
or estimates, and each original sheet of plans or drawings regardless of size or 
binding.  All other engineering work, including but not limited to research reports, 
opinions, recommendations, evaluations, addenda, documents produced for litigation and 
engineering sorfware shall bear the engineer's printed name, date, signature and the 
designation "P.E."....."
6.  If you want more information, in Texas, the Texas State Board has a home page at: 
http://www.main.org/peboard.  They also have an e-mail address: 
peboard@mail.capnet.state.tx.us.  And of course the regular old phone, 512.440.7723.
Roxanne L. Pillar, P.E.
Texas State Board member

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
My husband keeps showing me all of this discussion.  I believe it time for me to render 
my professional opinion regarding the engineering profession and licensing.  
1.  Practice - Most states have a practice act (versus a title act) and give the 
engineer a license to practice, just like a doctor.  The purpose of the law is to 
provide a minimum standard of proficency that will protect the health, safety and 
welfare of the public.  Its not a guarantee of how people will perform once they have 
that license.  Texas was the last state in the Union to require the NCEES exams and made 
that change in 1992.  
2.  Exams - The standardized test is supposed to measure a depth and breadth of 
knowledge and experience and again is a minimum baseline.  Texas is a state that 
licenses engineers without specific regard to which discipline.  It is up to the 
professional to practice only in those areas of education and experience.  The test is 
attractive enough that Mexico (thank you NAFTA) and Japan are both interested in 
utilizing these exams.  NCEES is always on the lookout for good problem writers for 
those of you who think the test needs improvement.    
3.  EIT - For those wondering what to call themselves just out of school and with the 
EIT behind them, it depends on your state.  Many states are still using the 
Engineer-in-Training (EIT) designation and some have changed to Engineer Intern 
believing it sounds more professional.  I was proud to have my EIT and framed it and 
hung it in my office until I received my P.E. 
4.  Industrial exemption - This issue more than any other may be the demise of 
engieering as a profession.  No one would dream of exempting doctors or lawyers from 
their licensing requirements because they worked say for a corporation or the 
government.  And since so many people in those exempt industries use engineering titles, 
the public does not recognize the difference.  If you work for an exempt industry, are 
downsized and then offer your services back to that company (not directly on the exempt 
company payroll), you have just become a consultant and are no longer exempt.  Also, if 
you do work in an exempt industry and are licensed as a professional engineer, you are 
supposed to be sealing and signing engineering work that goes out of the company (at 
least in Texas).  I know, I work for the Federal government.  And even though my 
employer may not require it, the Texas law does.  
5.  Sealing engineering work - One of the messages stated "most of my work is never 
sealed because I rarely do design work".  I hope you have a recent copy of the Texas 
Engineering Practice Act.  Please read Board Rule 131.138, 9.  For those of you who do 
not have a copy of the law it it states:  "The engineer shall sign, seal, and date the 
original title sheet of bound engineering reports, specifications, details, calculations 
or estimates, and each original sheet of plans or drawings regardless of size or 
binding.  All other engineering work, including but not limited to research reports, 
opinions, recommendations, evaluations, addenda, documents produced for litigation and 
engineering sorfware shall bear the engineer's printed name, date, signature and the 
designation "P.E."....."
6.  If you want more information, in Texas, the Texas State Board has a home page at: 
http://www.main.org/peboard.  They also have an e-mail address: 
peboard@mail.capnet.state.tx.us.  And of course the regular old phone, 512.440.7723.
Roxanne L. Pillar, P.E.
Texas State Board member

>   rongraham1@aol.com (RonGraham1) writes:
>  I am looking for a software package with which I can create
>  and edit shear and bending moment diagrams, and which will
>  calculate deflection and rotation.  (For those not recent on 
>  their strength of materials, that's a tool for analysis of beams.)
>  I'd like to be able to vary the beam boundary conditions as well.
>  
>  The calculations are simple and straightforward for most beams,
>  but I want the *diagrams* as well, to integrate into documents.
>  
>  I've looked in the public domain software archives at asme.org, 
>  but I can't find anything there that I am certain fills this need --
>  since I have only filenames to go by, I could easily miss something.
>  I've checked a couple other web sites with no luck.
>  
>  Our preference is shareware, freeware, or cheap, since we don't
>  need many bells and whistles, but any suggestions will be 
>  looked into.  And any suggestions will be cheerfully summarized
>  to this newsgroup.  Thanks in advance.
>  
>  Dr. Ron Graham
>  Project Engineer for Robotics, GreyPilgrim LLC, Washington DC
>  founder of sci.engr
>  EMMA Robotic Manipulator online -- http://www.greypilgrim.com/
>  
>>>>
You might try a program called Beam II.  Last info I have for Orand Systems
is:
Orand Systems
4165 Fieldgate Drive Unit 85
Mississauga Ontario Canada L4W 2M9
905 624 2135   fax 905 624 8046   
Cost is around $100 USF.
Richard Rumancik

You can now measure up to 8 thermocouples simultaneously with any PC 
using either DOS or Windows at very low cost.  Temperature logger hooks 
up directly to serial port of PC and displays temperature vs. time in 
either tabular or graphic format.  For further details contact Lazar 
Research Labs. Inc. at 1-800-824-2066 in the U.S. or email 
service@lazarlab.com or fax 1-213-931-1434.

Andre Kroecher wrote:
> 
> I'm wondering how the injection plastics industry models their
> prototypes without actually tooling each mold in steel first, before
> knowing the optimal design.
> 
> Thanks
> 
> Scott Chapman
Scott, they either make prototypes by fabriction or by rapid prototyping. I make Them in 
my own shop.  Some machining, some vacuum forming, some brute force forming and lots of 
bonding bits and pieces together.  Then sanding, filling, painting.  The simplest 
material to use is readily available high impact polystyrene.
Pat -Old Engineer Guru at SKONK WORKS

Pedro Anselmo Filho  wrote in article
<01bbc3ad$542526a0$1ffdf9c8@panselmo.truenet.com.br>...
> I need some help with which standards I should consult for design a
> Pressure Vassel.
> Pedro Anselmo Filho
> panselmo@truenet.com.br
	There are many pressure vessel standards, and among them perhaps the most
widely used internationally is the American Society of Mechanical Engineers
Boiler and Pressure Vessel Code, Section VIII, Division 1, Pressure Vessels
(in brief ASME BVP VIII-1).
	  John Cheung, PhD

Conference Announcement and Call for Papers
1997 Australian ANSYS Conference
Practical Finite Element Analysis Applications in 
Industry
25 - 27 June 1997
Sheraton Towers Southgate
Melbourne, Australia
Organized by:
Worley FEA
A Division of Worley Limited
300 Flinders Street, Melbourne 3000
Tel: 61-3-9205 0500
Fax: 61-3-9203 0505
Supporting Organisation	
ANSYS, Inc. Houston, PA, USA
Why Finite Element Analysis?
Many industries are realising that yesterday's answers are not always tomorrow's solutions. 
 Companies are re-engineering their design through manufacturing processes 
with finite element analysis (FEA) design and simulation technology to provide 
better products, faster, and at a lower cost.
The ANSYS family of products provides a very flexible engineering environment;
 it is integrated with more CAD packages than any other analysis package, and 
runs on a wide range of hardware from PCs to supercomputers.  Worley FEA, 
exclusive distributors for ANSYS in Australia and New Zealand, invites you to 
the 1997 ANSYS Conference to see and hear about practical engineering 
applications of FEA technology.  This three-day event will be held at the 
Sheraton Towers, Southgate, Melbourne from 25 - 27 June 1997.  The first day 
will be devoted to training on ANSYS capabilities conducted by ANSYS, Inc 
developers and Worley FEA staff.
This conference is your best opportunity to meet FEA users from a range of industries 
around Australia, and see how others are using the technology.  ANSYS, Inc 
developers and management, and Worley FEA's team of experienced analysts will 
be available to discuss how ANSYS can help with your particular design needs.  
Who Should Attend?
This conference is geared towards design engineers and FE analysts, as well as
 business and engineering managers.  Attendees can learn more about the ANSYS 
program's capabilities, using FEA to simplify their product design / 
verification and prototyping processes, and maximize the benefits of their 
CAE/CAD investment.
Organising Committee - Worley FEA
Dorel Iosif	                Conference Secretariat
Geraldine Campbell	Organiser
Joe Corvetti
Joseph Wong
Review Panel
Dr John Wilson
Melbourne University	
Dr Saeed Roshan
Transfield Defence Systems, VIC
Ian Simmonds
Mackay Consolidated Industries, VIC	
Stan Nowak
Herman Research Laboratories, VIC
Dr Howard Lovatt
CSIRO Division of Applied Physics, NSW	
David Fry
Invetech Operations, VIC
Dr Ernst Hustedt
Advanced Mechanical engineering Solutions, Christchurch, NZ
Chris Norwood
DSTO-Aeronautical and Maritime Research Laboratories, VIC
Conference program at a glance
Tues 24 June 1997
6.00 - 8.00pm: Registration
Wed 25 June1997
am: Registration; Training seminar-Integrating CAD and FEA using ANSYS
pm: Training seminar:Advanced dynamics, crash and metalforming simulation using
 ANSYS/LSDYNA-3D
Thurs 26 June1997
am: Registration; Keynote address Technical Session 1
pm: Technical Session 2
evening: Conference Dinner
Speaker: Bill Hunter, Niche Design Group P/L
Fri 27 June 1997
am: Technical Session 3
pm: Technical Session 4
Sat 28 June 1997	Social Program
Call for papers / Further information
Papers describing ANSYS applications in industry and research are invited. 
 Abstracts of no more than 300 words should be submitted to the Conference 
Secretariat as soon as possible, or at the latest by 31 January 1997.  
Abstracts should clearly state the title, objectives, assumptions, methodology 
and results of the project to be detailed in the paper.  Completed manuscripts 
must be submitted to the Conference Secretariat no later than 15 April 1997.  
The Proceedings of the Conference will be available at the time of the 
Conference.
Abstracts and manuscripts should be emailed/posted/faxed to the Conference Secretariat:
Dorel Iosif
Worley FEA
300 Flinders Street
Melbourne 3000
Australia
Direct: 61-3-9205 0414
Fax: 61-3-9205 0505
email: diosif@worley.com.au
Target Dates
Submission of Abstract	31 January 1997
Notification of acceptance of Abstract	28 February 1997
Submission of final manuscript	15 April 1997
Conference	25 -27 June 1997
The Sheraton Towers
The Sheraton Towers is located in the exciting Southgate Arts and Leisure Precinct and on
 the banks of the Yarra River.  The hotel is a five minute walk from the 
city's shopping centre and 20 km from Melbourne International Airport.  The 
Sheraton Towers' quality service has been acknowledged by the following awards:
Rated No 1 CBD conference venue in Australia, 1995, and Australia's Top 100 conference
 venues. 
 National Business Bulletin May 1995
Recipient of the M&C; Gold Key Award Asia/Pacific, October 1995.
Recipient CIM Accolade Award 1995, Convention and Incentive Marketing
Accommodation
Discounted rates have been arranged at the following hotels for Conference attendees. 
 Please book direct with the hotel of your choice, and mention the 1997 ANSYS 
Conference to qualify for these rates.The Novotel on Collins is a 10-minute 
walk to the Sheraton Towers.  The Sheraton Vista on Spring Street is a 
10-minute ride on the free City Circle Tram to the Sheraton Towers.
Hotel
Sheraton Towers Southgate
tel: (03) 9696 3100
fax: (03) 9690 6581
Rate: $270 includes full buffet breakfast, use of Health Club facilities, and 
a butler service
Novotel on Collins	
tel: (03) 9650 5800
fax: (03) 9650 5800
Rate: $169 with buffet breakfast
Sheraton Vista, Spring Street
tel: (03) 9205 9999
fax: (03) 9205 9905
Rate: $115 with buffet breakfast
Details of other hotels are available on request from:
Geraldine Campbell
Tel: 61 3 9205 0492
Fax: 61 3 9205 0505
Email gcampbel@worley.com.au
About Melbourne
In Melbourne you'll find loads of attractions suitable for all types of social programs or
 pre and post-conference travel. There are over 4,500 restaurants representing 
more than 70 national cuisines.  The shopping districts are second to none, 
and Melbourne is undoubtedly Australia's arts, entertainment and nightlife 
capital.  And nowhere in Australia can you find more love and pursuit of 
sports than in Victoria, with its immense range of specialised 
facilities.Despite the jokes, Melbourne enjoys mostly moderate weather - cool 
to mild in spring, warm to hot in summer, mild in autumn and brisk in winter. 
The rainfall is fairly evenly spread and seldom heavy, with one of the lowest 
readings for an Australian state capital city.   In June you can expect an 
average maximum temperature of 14(C (68(F)   and an average minimum of 7(C 
(45(F).   Major city department stores are open on Saturday and Sunday with 
late night shopping on Fridays.
Registration
1997 Australian ANSYS Conference
Melbourne, Australia
25-27 June 1997
Post/fax to
Geraldine Campbell
Worley FEA
300 Flinders Street
Melbourne 3000	Tel: 61 3 9205 0492
Fax: 61 3 9205 0505
Email: gcampbel@worley.com.au
I wish to present a paper.  The abstract is attached.  Please register me for 
the conference
as indicated below.(Payment is enclosed) / (My Purchase Order 
number is                             )
I wish to present a paper and will submit the abstract by 31 January 1997. 
 Please register me for the conference as indicated below.
(Payment is enclosed) / (My Purchase Order number is                             )
Please register me for the conference as indicated below.
(Payment is enclosed) / (My Purchase Order number is                             )
Registration options
Both training seminars with lunch
Conference registration 25 - 26 June 1997 with lunch each day
One set of Conference Proceedings
Conference dinner	$875
One training seminar with lunch	$150
Both training seminars with lunch	$250
Conference registration 26 - 27 June 1997 with lunch each day
One set of Conference Proceedings
Conference Dinner	$550
Conference Dinner only	$75
Set of Conference Proceedings	$120
Social program	To be announced
Professor/Dr/Mr/Mrs/Miss __________________________________________________
Position/Title_____________________________________________________________
Organisation______________________________________________________________
Address__________________________________________________________________
_________________________________________________________________________
Tel:__________________Fax:__________________Email:________________________
Worley FEA are exclusive distributors for     Finite Element Analysis Software in Australia and
 New Zealand

Proposal:  
Grandfather all practicing engineers and current engineering faculty; 
do away with the industrial exemption;
from now on
require all ABET accredited  degree programs to have their students take
the EIT during the senior year;
require all ABET accredited faculty to be PE's;
There is something for everyone in this, and the resulting situation
might be enforcable.

***** NEW BOOK *****
FINITE-ELEMENT MODELLING OF UNBOUNDED MEDIA
John P. Wolf and Chongmin Song
ISBN 0 471 96134 5, John Wiley & Sons, 1996, 331 pp,  cloth, 
Ģ40.-/$75.-
                           ** Description **
Presents three novel methods to model the unbounded medium in a dynamic 
unbounded medium-structure-interaction analysis.
1.  The consistent infinitesimal finite-element cell method, a boundary 
    finite-element procedure which combines the advantages of requires
the 
    discretization of the structure-medium interface only and is exact
in 
    the finite-element sense. It is applicable to unbounded media
governed 
    by the hyperbolic, parabolic and elliptic differential equations.
2.  The damping-solvent extraction method permits the analysis of a
bounded 
    medium only.
3.  The doubly-asymptotic multi-directional transmitting boundary is
exact 
    for the low-and high-frequency limits at preselected wave
propagation 
    directions.
Read-to-run code and source code available free of charge with purchase
of book.
                           ** Contents **
Two- and three-dimensional scalar and vector wave propagation in
compressible
and incompressible elasticity. Diffusion. Time and frequency domain
analyses. 
Statics. Bounded medium.
                           ** Market **
Engineers, software developers and scientists in structural and soil
dynamics, 
acoustics, heat transfer, electromagnetism, seismology.
Researchers in finite elements and boundary elements. 
------------------------------------------------------------------------------ 
Chongmin SONG                                    email:
cs@lchdec1.epfl.ch
Institute of Hydraulics and Energy               Fax:   ++41 21 693 2264
Department of Civil Engineering                  Tel:   ++41 21 693 2858
Swiss Federal Institute of Technology Lausanne
CH-1015 Lausanne, Switzerland

John Lloyd wrote:
> 
> I've run into a little difficulty with a bit of research I'm doing and
> any suggestions most welcome.  I need to turn a small plastic cone about
> 25mm long and 2mm max diameter ( going down to point ). 
Also, try the "rec.crafts.metalworking" newsgroup.
-- 
M.E. Moore
Los Alamos, NM

Steve Baker wrote:
> 
> I reply:
> In North America the National Council of Examiners of Engineers and
> Surveyors administers standardized examinations.  Through US state
> boards.
> 
Not all of North America, at least not yet.  And you won't see me doing
anything through the 'US state boards' ever, unless I want to practice
down there.  (And I don't think it's cold enough in hell yet. ;-) )
> Get involved with your national society (Canada has one also) and
> stay up to date.
The national society in Canada may handle things like accreditation of
engineering schools, but the provincial boards do the regulating and
licensing of engineers, so I'll just keep in touch with them.  (And as
I've said before, almost all Canadian engineers are P.Eng's or E.I.T's
anyway.)

I apolotize for "double replies".
For some reason my Netscape 3 mail utility reports "cannot find mail
server" when I press "SEND" the first time.  When I repress "SEND"
aparently two copies get put through.
Can anyone explain why??
Jim Woodruff
CMW Inc.

We now have link from our page relating to the Equotip Portable
Hardness Tester, to ASTM page which facilitates a simple search for
the specification.
The Equotip has been in use for over twenty years without the
standard. This new standard should assist current users of the
instrument in assuring that the instrument is being used and
calibration is checked correctly. Also, the use of the Equotip method
of hardness testing metals will be much easier to implement with a
widely accepted standard.
http://www.corvib.on.ca/index.html
This is a framed page - alternatively
http://www.corvib.on.ca/equotip.htm 

Andre Kroecher wrote:
> 
> I'm wondering how the injection plastics industry models their
> prototypes without actually tooling each mold in steel first, before
> knowing the optimal design.
> 
> Thanks
> 
> Scott Chapman
You can also resin cast into rubber moulds.  The mould can be taken off
from a wood plug the same shape as the intended article.  Most casting
resins don't have quite the same properties as thermoplastics, but they
do pretty well for prototyping.
Try Ciba for their selection of resins. (there are other, I just happen
to be aware of them)
Dave

> 
> > 
> >  
> >  	I am working on a zero-g flow boiling experiment involving a 
> >   counterflow vertical annulus comprising a test fluid in the central 
> >   annulus with a heating fluid in the outer annulus. The test fluid is 
> >   undergoing a phase change, and I need an accurate way to predict the 
> >   minimum tube diameter needed to avoid cappillary bubble flow.  My current 
> >   method involves a force balance on a hemispherical meniscus in the tube.  
> >   I'm sure there are better ways of predicting this phenomena.  I have 
> >   several different fluids under consideration, each with vastly different 
> >   surface tensions.
> >   
> >   Thank you,
> >   B.F. Lundy
> >   Texas A&M; University
> >  
> >  
> > 
> > 
> 
> 

We are looking for sources of DC blowers capable of the following:
output flow: 3 inches of water pressure at 5,000 rpm or less with a flow
	     volume of around 20-24 cubic feet per minute
output nozzle: we would like to see something in the 1.375 - 1.75 inch outlet
	       nozzle diameter
misc:	time to speed (about 5,000 rpm) of less than 3 seconds
	some type of speed control to maintain the rpm at a 
	   given value +/- 100 rpm
	the capability of dynamic braking from 5,000 rpm to 0 in less than 
	   about 3 seconds
If you have any information of sources of manufacturers who make a blower in
this range, please let me know.  We have one source for these blowers, but
our manufacturing engineers would like to see a second source.
Thanks,
Gary Hartman
--
---------------+--------------------------+
| Gary Hartman |  hartman@cldx.com        |
|--------------+--------------------------| 
|    Equipment Design and Development     |        
------------------------------------------+

Hi,
Could you help me to find mechanical properties of silicon?
I just couldn't find allowable stress and strain in all orientations.
manay thanks in advance
Hong Pan

:At -40, car tires on ice have about the same effective "coefficient of
:friction" as on normal pavement at room temperature.  Years ago, a number
:of driving experiments were carried out on (very) frozen lakes, before the
:car companies had the large paved "skid pads" that the test tracks now
:have...
I thought it interesting, I heard some of the earliest "land speed"
records were set on frozen lakes. I guess they were bigger and
flatter than any roads at the time.
-- 
george 	
george@mech.seas.upenn.edu

If you have an interest in Electronics manufacturing i.e.,
Printed Circuit Boards
Surface Mount Technology
Contract Manufacturing
Assembly
Components
Sensors
Fiber Optics
Job Shopping/Mechanical Engineering
etc
visit US Tech at:   www.us-tech.com for a FREE subscription to
our publication, (snail-mail) tabloid. Thanks.

In article <3273CF5F.7942@asme.org>, Jeff Wright 
writes
>Sounds like a good job for "Rapid Prototyping" from a solid model.
>
>> In  John Lloyd
>>  writes:
>> >
>> >I've run into a little difficulty with a bit of research I'm doing and
>> >any suggestions most welcome.  I need to turn a small plastic cone
I donnt care how long it takes --- "Slow prototyping" would do me
fine!!!
-- 
John Lloyd

I am searching for fellow engineers who are working 
on the dynamics of the human body.  I would also be 
interested in talking to anyone working on the 
dynamics of animals (dogs, horses, etc) as well.  
I am beginning my Ph.D. in this area and have had 
little success finding researchers involving in 
dynamically modelling the human body.  I have 
found many articles on the kinematics of gait 
and as such, that is very helpful.  But is there 
someone out there using Kane's method, Euler's 
equations, or Lagrangian analysis?  Please write 
back with any information you may have.  
email: hubb@lamar.colostate.edu
hubb

In article  wardb@alumnae.caltech.edu (Ward Burrows) writes:
>Just to add my $0.02, this is not a new idea.  There were quite a few
>WW2 era German aircraft that flew with diesel engines, 
I believe that Sir Harry Ricardo was involved in the development of
high speed lightweight diesels for powering British lighter than air
ships during the 1920's. Does anyone know where I can purchase a copy
of his book "Memories and Machines" ?

Ward Burrows (wardb@alumnae.caltech.edu) wrote:
---- stuff snipped ----
: reconnaisance plane, and it had an exceptionally long range.  I also
: heard an unconfirmed report that the first jets, like the Me 262,
: burned diesel in their jet engines as well.  Can anyone confirm or
: deny this?
Don't know about the Me 262, but I know that at least some turbo prop
crop dusting airplanes (Piper AgCat I think) can use diesel fuel under
warm weather conditions.
Doug
[Moderator's note: The short-lived turbo race cars could burn any
liquid with carbon, oxygen, and hydrogen; I seem to recall a demo
using aged Scotch, which had many bystanders openly wincing since pure
ethanol would not have been nearly so wasteful....  MFS]

Ward Burrows wrote:
> Just to add my $0.02, this is not a new idea.  There were quite a few
> WW2 era German aircraft that flew with diesel engines, including a
> couple production aircraft.
> While World War two era technology is pretty much obsolete by now, the
> fact that diesel powered aircraft have been built and used
> successfully then is a pretty good indicator that we could make them
> useful today...
in actual fact, kerosene is nothing more than a light clean diesel
that won't go solid at very cold ambient temperatures.  This varies
geographically due to local climate.  ie don't have to worry about
freezing temperatures in Florida!  Jet fuel is an ultra clean kerosene
that wont go solid at -40C, -47C, or -58C depending on grade, because
it is VERY cold up there where jets fly, even if you take off from
Miami Florida, since it gets down to -56C by the time you climb over
Jacksonville!.
diesel engines are big, heavy and slow but thermally efficient if
liquid cooled.  Hot damn in big trucks.  Real hard sell in aircraft.
bad match of performance/weight.

Ward Burrows wrote:
> Just to add my $0.02, this is not a new idea.  There were quite a few
> WW2 era German aircraft that flew with diesel engines, including a
> couple production aircraft.
    It stands to reason, since modern jet fuel is not really that much
different from #1 diesel.  BTW, in the US in the thirties there was a
Bellanca Pacemaker the was powered by a diesel radial.