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-   -   SAITO's new engine (https://www.rcuniverse.com/forum/gas-engines-142/11699294-saitos-new-engine.html)

sbb 05-14-2022 08:02 PM

SAITO's new engine
 
FG-41TS

https://cimg6.ibsrv.net/gimg/www.rcu...389812a84e.png

https://www.saito-mfg.com/fg41ts_run-in/

sbb 06-12-2022 10:03 PM


sbb 06-24-2022 08:33 PM


sbb 06-24-2022 08:34 PM


sbb 06-29-2022 04:20 AM

Ram air effect


1967brutus 06-29-2022 04:50 AM


Originally Posted by sbb (Post 12733140)
Ram air effect

Tried that.... Does not work nearly as well as anyone thinks. Scratch that: It does not work AT ALL! It will in fact have a negative effect on cooling.
At 50 mph, the pressure at the intake of that ram air duct is a maximum of a whopping 3 mBar, and that value is only achieved with a fully closed exit.
That kind of weak pressures is NOT going to compress air into that converging exit. It simply is not. All it will achieve is a reduction of air velocity in the wide "ram air intake".
So there will be less air flowing between those rockerboxes, and at a lower velocity, resulting in less heat dissipation.
I can assure anyone from experience, that a diverging duct will have a better effect, and in fact will result in an improvement of airflow. A slight bit of divergence will go a long way, too much and the effect will be cancelled.


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