YS vs. OS and or Saito - Performance vs. reliability

YS vs. OS and or Saito - Performance vs. reliability (Full Version)

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Crash King -> YS vs. OS and or Saito - Performance vs. reliability (4/8/2002 4:00:51 AM)
It is probably well known that YS has the performance edge. I have been working on a .53 for about two weeks now and had to send it back to YS to see if they can resolve the issue so. When I was working on this issue several people emailed me, or told me in person they got rid of their YS engines because they were high maintenance and very picky regarding tuning. I guess what I am asking from you die hard YS folks is the following. 1) Can you let your YS engines sit for a period of time, say 4-6 months and still drag them to the field and fly them? 2) I know some of you are Loyal YS'ers. But do you spend most of your time tweaking or flying. Be Honest PLEASE. I am concerned as I now have two planes I am building, one was planned for an YS120, the other a 91. I have to tell you guys I want to fly not be a mechanic, if I have to rebuild the fuel regulators and or engines all the time I will accept a degradation in performance to get in the air. Time flying slow beats time on the ground any day. Not beating on YS, just want to know what to expect.

can773 -> YS vs. OS and or Saito - Performance vs. reliability (4/8/2002 4:52:01 AM)
1. Yes, but others will disagree with me :) I never use any afterrun, I dont run them dry and they sit from October until about now (we are going soon I hope). I take them to the field and they fire up right away. 2. Most of my time flying. As per above, when I start my motor after sitting all winter, its still set properly :) Once set up I can go all summer long without adjusting it, unless something changes drastically. I check the valves about once a month, and send it in for service once I have some time on it or I notice that the performance is dropping off. Remember that the top F3A guys in the world run these motors, they dont want to fiddle they want to fly, why do you suspect that they choose to run them?

Ladyflyer -> YS vs. OS and or Saito - Performance vs. reliability (4/8/2002 5:20:16 AM)
People send Saito AND OS engines back everyday too. I have worked at a local hobby shop and have seen a lot of engines come back.For all reasons . Yes ,I use after oil and yes I pull them out and fly them. Sometimes after a long layup the regulator needs to be cleared. NO BIG DEAL ! They run GREAT they are the most reliable engine I have ever owned . Like the CanMan says above ,set them up in the summer and run them. Competition flyers have NO time for engine fussing and if the YS were fussy they would not be using them. Maybe if you only fly once or twice a year the YS is too much . IF you can't make it run I agree GET RID OF IT ! How much do you want for it? ;) I had people tell me the same thing when I bought my first YS . Boy am I glad I didn't listen ! Come to think of it they have trouble with whatever they run! YS 91,,,,,,,, 20,,,,,,,,,, 64.52% Saito,100,,,11 ,,,,,,,,,,,35.48% BTW I don't qualify as a "DIE HARD" YS fan . When something better comes along I will jump on it . Always looking for better. ;)

bpannier -> YS vs. OS and or Saito - Performance vs. reliability (4/8/2002 6:05:50 AM)
I have one a 120 that is 13 years old no problems ( also 4others 2m 120s and 2 91s) run helie plus with two oz of klotz to the gal, F plug . do not run dry and NO after run oils. Will start after six months of no use. Same with my Saitos and OS engines. Like the fuel system on the YS the best always delivers fuel if every think is kept kleen.

Scorpionjack -> YS vs. OS and or Saito - Performance vs. reliability (4/8/2002 7:04:42 AM)
Ditto with the rest CK; I own 5 and never had a problem they sit from October and just pulled the 63 out yesterday and she started right up. No I don't use after run in the YS's but the 2 Strokes I do. I do run them dry before putting them up. BTW she would be flying today but the dang Snows just hit again.

FastLaneAK -> Lady Flyers signature (4/8/2002 7:31:22 PM)
Lady Flyer, I may be one of those "slow guys", but I just can't seem to figure your signature out. Give a hint so I don't pull my hair out. Lane

OnTheEdge -> No tinkering needed............ (4/8/2002 7:53:53 PM)
With the exception of the valves, I've never needed to adjust anything on my YS91. As a matter of fact I don't even have anyway to adjust the high, lower-end or regulator once I put the cowl on. I just set up the engine with the cowl off and then put it on and didn't touch it for years. No after run either. Plane sits from October to April and starts up with no problems. Now , that being said, I'm sending in my original engine as it's not performing as well due to what I hope is normal wear-n-tear. I have well over 600 flights on this engine so I guess I'm due. Fortunately I had a N.I.B YS91 that I just started to break in yesterday that I'll just bolt on till the orginal is freshened up.

Dansy -> YS vs. OS and or Saito - Performance vs. reliability (4/8/2002 8:22:21 PM)
Well I have both YS and OS engines pretty much exclusively, and they sit all winter in my shop...until pretty soon I hope...:) Once both the OS or YS are well adjusted they no longer need anything...I do not adjust my OS every day either like all the members of my club...they spend two minutes to adjust the needle valve every flight...I don't it's adjusted and it stay that way...unless I change prop or the weather go from 0 to 28C in a day....ya sure dream now....of course the valve do need adjustment once an a while take about 2 minutes. YS 53 and 91 (sold my last 140L) OS 32, 46 (2), 61, 140 (3) Daniel D.

deputydog -> YS vs OS vs SAITO (4/8/2002 10:04:31 PM)
80% of my engines are YS, 15% OS and the rest is gas( OH, and a MOKI!) By far the easiest to maintain are the YS motors. Just pulled a 2 stroke 45 out that crashed a year ago. Decide to run it inverted on this new plane and it fired right up! Same thing on the 4 strokes after sitting 4-6 months. If someone does not want to get a YS then I try get them to buy an OS because this is another engine that you can tune and forget, just not as much power! Now there are a few small techniques that have to be learned on the YS and it always helps to have someone at the field that is knowledgeable but once you learn these you should have a long and trouble free life with your YS!

Ladyflyer -> YS vs. OS and or Saito - Performance vs. reliability (4/12/2002 4:31:26 AM)
Hey Fastlane, It's kind of like the Psychoanalyst's ink blots. It is whatever it looks like to you. There are no right or wrong answers, some are more interesting than others ;)

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