| Home |
| Search |
| Today's Posts |
|
#18
posted to rec.boats
|
|||
|
|||
|
On Sun, 13 Sep 2009 22:07:59 -0400, JustWait
wrote: In article , says... On Sun, 13 Sep 2009 20:23:48 -0400, Gene wrote: On Sun, 13 Sep 2009 17:21:05 -0700, "Calif Bill" wrote: "Tom Francis - SWSports" wrote in message ... Part I http://www.youtube.com/watch?v=EX_is9LzFSY Part II http://www.youtube.com/watch?v=Q9OkFTDG4fY Can you explain Reimann in 20 minutes? Reimann amounts to a bunch of 000000000000000..... zeros! It's a little more complex than that - it also involves proving the existence of prime numbers by examining the graphical anomaly of non-trivial zer.....er....sorry. :) Besides my area of expertise is Reimann Manifolds - in particular holomorphic functions and their relationship to Taylor Series or infinitely differentiable analysis of data sets in N-space where....er.....sorry again. :) OTOH..... Warehouse 13 on SyFy allows you to play Escher football! Imminently more practical....... Good point - love that episode bump. Hey Tom, check out the link at the bottom of this clip from my motorcycle group... snip You didn't read the full page at the provided link, to the point where they say: We now have a simple 2 stroke expansion chamber design program. FREE download here This program is not a part of MOTA, but it has been put together by the same engineers as a starting point for those wishing to begin from scratch. It calculates the dimensions for both double and triple stage diffuser expansion chambers from a few basic engine dimensions. The information used in the program's calculations was taken from the books ?The Basic Design of the Two Stroke Engine? and the book ?Design and Simulation of Two Stroke Engines?; both books are written by Professor G.P. Blair of Queens University Belfast, and published by the Society of Automotive Engineers. You are well advised to read at least one of the books mentioned above, since they contain the author?s academic lifetime of knowledge on the two-stroke engine. There are several coefficients used in the design of the expansion chamber ? these are a function of the engine?s state of tune. Those used in this program have been chosen for petrol engines, and are in the range 50cc up to about 500cc per cylinder. It is doubtful these formulae would work on small capacity glowplug engines, since the exhaust gas temperature is much lower, and the engine speed is much higher. The free expansion chamber code: http://www.bevenyoung.com.au/pipe_dsn.zip /snip Have fun... Might be nice if it would open. |