Attention, Internet Explorer User Announcement: Jive has discontinued support for Internet Explorer 7 and below. In order to provide the best platform for continued innovation, Jive no longer supports Internet Explorer 7. Jive will not function with this version of Internet Explorer. Please consider upgrading to a more recent version of Internet Explorer, or trying another browser such as Firefox, Safari, or Google Chrome. (Please remember to honor your company's IT policies before installing new software!).

1. Exhaust Ventilation System Designs
2. Sound System Design Software
3. A New Exhaust Ventilation System Design Software

Determining the Timing The animation shows, how to measure the timing angles of exhaust and transfer port. These angles define how long the ports are open, expressed in crankshaft angle. You can attach a disk with divisions in degrees to the crankcase and a pointer to the crankshaft (or vice versa).

Then you adjust disk and pointer so that the it indicates 180° when the piston is at its bottom dead center. Now you turn the crankshaft until the port of interest closes (when the piston crown arrives at the upper edge of the port). It is helpful to point a flashlight or a halogen lamp through the plug hole or to remove the cylinder head. Reading the angles in both directions must be symmetrical to the bottom dead center, e.g.

A port opening at at 100° must be closing again at 360°-100° = 260°, as shown in the animation. The port timing angle (shown in blue) is then 260° - 100° = 160°. This means, that port is open while the the crankshaft turns 160°. Usually the transfer port will have a shorter timing than the exhaust port. Background Used Formulas (a mixture from , , and ). (metric units) The opening angles of the cones should be 4° to 10° for the opening cone and approximately twice this value for the closing cone.

Cut view of a tuned pipe with silencer. Enlarged view of the muffler section. See also: with some engines optimized for tuned pipes, to learn more about the history of tuned pipes for model engines, my software, including a similar tuned pipe designer. How to download JavaPipe to use as a standalone Application Remark: to use JavaPipe in the standard way in your browser, over the internet, it is not necessary to perform the procedures described in this section.

Exhaust Ventilation System Designs

I cannot give much support to solve any problems occurring while running your local copy based on your local Java installation. If you have not already a working Java system on your machine, you might want to consult a computer guru. If you want to run your local copy of JavaPipe, you can download a copy of the JavaPipe archive to your disk. You can also save the applet page to a local file, depending on the method you want to use for running you local copy.

Step by Step Instructions to download the required files. Check, whether you have a Java virtual machine (VM) installed on your system. Windows: open a command window and execute the commands jview and wjview. Usually a Java VM can be installed during the installation or when upgrading the Microsoft Internet Explorer.

Sound System Design Software

Unix: open a shell or xterm window and execute the command java. If these commands can be found, your system probably has a working Java installation. If not, you will have to get the appropriate Java Runtime Environment (JRE) for your system from Suns web site. Download this html file from. Download the ZIP archive with the class tree from the following web address:. Create a subdirectory 'java' below the directory, where you have copied this html file and move the javapipe.zip file into this directory. Now you have both files to run JavaPipe either as an applet or a standalone application.

You can run the applet by loading this html page into your browser or by using the AppletViewer. To make life for Windows users easier, you can download the following VBScript file to start JavaPipe as a stand alone application: Using this script and the archive, you can run JavaPipe by merely clicking onto the.vbs file. To make life for Windows users even easier, you can also download the following Windows Installer file which contains all you need and installs it correctly: To re-install or de-install use the 'Software' applet inside the System Control Program of Windows.

A New Exhaust Ventilation System Design Software

Last modification of this page: 16.02.08 Suggestions? Due to the increasing amount of SPAM mail, I have to change this e-Mail address regularly. You will always find the latest version in the footer of all my pages. It might take some time until you receive an answer and in some cases you may even receive no answer at all.

I apologize for this, but my spare time is limited. If you have not lost patience, you might want to send me a copy of your e-mail after a month or so.

This is a privately owned, non-profit page of purely educational purpose. Any statements may be incorrect and unsuitable for practical usage.

I cannot take any responsibility for actions you perform based on data, assumptions, calculations etc. Taken from this web page.

© 1996-2014 Martin Hepperle You may use the data given in this document for your personal use. If you use this document for a publication, you have to cite the source. A publication of a recompilation of the given material is not allowed, if the resulting product is sold for more than the production costs. This document may accidentally refer to trade names and trademarks, which are owned by national or international companies, but which are unknown by me. Their rights are fully recognized and these companies are kindly asked to inform me if they do not wish their names to be used at all or to be used in a different way.

This document is part of a frame set and can be found by navigating from the entry point at the Web site.