Ed Cregger
Posts: 7736
Joined: 1/31/2002
From: Ringgold,
GA, USA
Status: offline
|
quote:
ORIGINAL: MOTORMAN37
Artism,
The one thing that most people are overlooking, is the fact that most Saito's are being run on high nitro. Then why not run a YS to start with. My YS 1.10 is a much better mannered engine than my Saito 1.00 could ever think of being. My YS ran perfect out of the box. My Saito took quite a bit of adjusting to get it tamed down, and it still shakes horibly compared to my YS. On top of the fact, I am running a Cline because the tank is not located correctly (over an inch higher than the carb), that is the way H9 designed the Hell Cat. I have never seen a YS that did not run excellent. Allmost all of the problems people have with YS's are due to fact, that they do not follow the directions. 
--------------
While I do enjoy YS engines, their models go out of production and are replaced very often and their selection of sizes is very limited. Yes, both YS and Saito went nitro crazy some years ago. I'm still ticked about that, but you know that.
A great many modelers like to be able to buy an engine and to know that even if they don't get around to using it for a few years, parts will still be easily available when they do get around to using it. This is not always true with YS (and now OS). Again, I'm speaking over a very long period of experience. Someone relatively new to the hobby, under ten years of participation, might not see it this way at all.
YS has many advantages, I agree. That is why I own some too. If they would offer their engines with higher compression, as they once did, I would fly more of them in sport planes.
As far as vibration goes, there is only so much that one can do to balance a single cylinder engine. There is no way to balance it for all rpm ranges, or completely balance it for any one rpm range, YS or otherwise. The engine's weight has a direct correlation to the perceived vibration level of the engine.
YS engines are never accused of being light, which can disguise their normal amount of mechanical vibration and power pulse vibration. Saito is penalized because it produces good power, but because they are light, the user perceives more vibration. Technically, the YS power pulses are stronger than any other four-stroke engine's power pulse, but the YS engine weighs so much, it isn't as noticable.
I'm not against YS. I'm not pro Saito to the point of being ridiculously prejudiced. I like them all. Each have pros and cons.
I do feel that the average modeler does himself a disservice by using a YS if he is not an engine man. Those having difficulties adjusting an atmospherically aspirated model engine can find themselves way beyond their level of competence when running a YS. Especially when something goes amiss.
_____________________________
Artisan
"Flying models since the Fifties - I'll get the hang of this yet!!!"
|
Printable Version
All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> 4 stroke pick? 
4 stroke pick? - 
I can idle for minutes in a long descent to landing, panic and hit the throttle fast for a go around and the power is there instantly 
I have never owned another 4 stroke engine besides a Saito... Do all the 4 strokes vibrate about the same amount ??? Or are the Saitos worse than the other brands of the same size ??? 
