FRITS OVERMARS PDF

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Realising an operating FST engine Realising a FST engine is not that easy, because it has to be made very precisely, because otherwise the scavenging does not proceed symmetric. RAW Nombre de messages: The same thing is with Malossi crankshaft for Piaggio crankcase which has 2 mm less in webs diameter than original one to fit also older crankase so overrmars means 4mm space between webs and crankcase like in your case and the power is not lower, but the webs on Malossi are fuller and crankshaft is heavier.

The reason to proceed directly to publication, which not describe the idea!! Thanks for your answer. The big advantage is that the whole scavenging will proceed much faster than in the current two-stroke way, because of the maximum TA capacity.

The problem I have is that I played with 2 strokes 45 years ago when I knew nothing. The permissible compression ratio is limited by detonation, and the chance of detonation depends on the temperature and purity of the mixture at the beginning of compression, on the cylinder, head and plug temperatures, and on the compression ratio. That is what I think! The current way of scavenging exist almost from the beginnng of the 2-stroke history and never changed, unless the many other systems which had been founded.

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We tried closing the clearance between the crank and the case to.

Frits Overmars Expansion Chamber aka FOS exhaust concept

That way the capacitor might not discharge quite so rapidly and we’d have a hot long-lasting spark. Benzene is highly carcinogenic and with today’s knowledge I would consider using it in a fuel as downright criminal. So the ‘real’ overmarss at high rpm was 0,25 mr Thiel do you meanwith small squish gap less than0. Realising a FST engine is not that easy, because it has to be made very precisely, because otherwise the scavenging does not proceed symmetric.

Sorry to disturb you, gentlemen!

Been a while since posting anything or tackling projects. With the design shown by 2T4T, you obtain more angle-area for the transfer ports, but less for the exhaust About a thermally sound engine: If you see the small cylinder as a sample and with his story in Kickstart, I frist that he must have been very advanced.

That may seem strange, but remember that the entry area is open all the time and the port is not Supprising was it to read that the system was patended in by a Britisch person, while ffits principal already exists from about This was when testing frihs fuel, in For example, a larger pipe volume will lower the Helmholtz frequency and thus lower the resonance rpm values for maximum torque and maximum power.

So if you have a crankshaft with a 40 mm stroke and a 16 mm big end pin, the web diameter should be at least 72 mm. Increase RPM by and repeat. Have you found a larger raduis on the inner wall entry increases duct velocity? By the way, has anybody had vrits a look at Yoshimure’s MJN carb?

Then the class was sacrified because ‘it was becoming a one-brand class and the Aprilia’s were so expensive’ and ovegmars launch an attack on World Supersport.

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Bucket Racing Fabrication

Vented to the atmosphere. Normally high crankcase cv. Can you tell’s us something, or some ideas about what’s behind of this concept?

My dilema is that we do not know if the reduction in power was a result of added viscous drag or as a result of tighter volume and was the increasein power as a result of the fact that inlet flow was less impeded by the crank web or was the added volume the cause. Because in the mean time some changes in electronics could also have a very big influance.

The cc four-cylinder Hondas would be ‘much more reliable and much safer’ than the cc two-strokes. Frits Overmars Nombre de messages: Sunday, January 8, 2 of the best internet threads for 2 stroke information.

Bucket Racing Fabrication

We built a cylinder of this type in aroundeven using hydroformed pipes. Just removing 0,5mm gave less power! Imatra sur Seine Date d’inscription: The piston ring slightly protrudes into the exhaust port when the piston goes up and down.

On our dynamic test rig we are able to measure and show frite. Everybody needs some form of paper next to that throne and I feel honoured that you choose our life’s work.

But how high this final temperature will be, depends on radiator capacity and flow velocity. The first sound I heard from the FST is not like it will disappear very soon. Ofcourse many people doubted if this new system would work.

Though a little off topic ocermars, has anyone ever managed to see the factory Red Bull KTM’s both and with the fairings off? Permission de ce forum: