[NSRCA-discussion] YS points of interest

Tue Oct 20 04:33:16 AKDT 2009

Hi Chris,

Maybe its time for a fresh look at YS (next comments will be biased :) with recent positive experiences).  This summer we have 4 new YS users in south Florida.  I've been helping these guys get their planes tuned up.

This is what this summer's experience has been: install YS, run for 1/2 a tank on ground, cool off, go fly.  The 170's have been easy to run right out of the box on glow plugs.  If you can tune an R/C engine, you have every chance of being successful with the modern YS's.

There are those amongst us with the ability to break an anvil.  There are those that can make any engine run.  But these new engines this year have all run out of the box, very strong.  I do not have 20 years of YS evolution behind me as I started in earnest with the YS 160's.  What I gather from the longer-time YS users, is that the new engines are the easiest to run motors they have come out with.

Don't be scared!  We know that the E-guys are trying to make their birds fly like the YS 4-cycle :) :) :)
Thanks Jim,
Team YS
10 Year Discussion List Reader :)
R/C O'holic
________________________________
From: nsrca-discussion-bounces at lists.nsrca.org [nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of krishlan fitzsimmons [homeremodeling2003 at yahoo.com]
Sent: Tuesday, October 20, 2009 2:02 AM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] YS points of interest

Thanks for the reply Tom.

A Kfactor article doesn't have to be 100% accurate. But if you share the knowledge you may have learned (even if others don't agree sometimes) in the form of an article, someone, just maybe 1 person (or more) may learn from your knowledge. Just a thought.

I know there seems to be a lot about electric in the Kfactor's lately. I obviously fly electric. But I would love for the YS folk out there to "keep it alive" by submitting things. I've tried hard not to make it a D7 (my district), or "my sponsor" Kfactor. I find it interesting when someone shares good knowledge on the list. Especially about things that I don't use.   Hopefully it can help people learn. I kinda feel that is what the Kfactor could help do.

It's odd for me really. I don't fly, or intend to go back to glow at this point, but I read your whole email. Which I don't normally do with most of the list stuff anymore.

Thanks for posting, even if it didn't pertain to me!

Chris

________________________________
From: "Koenig, Tom" <Tom.Koenig at actewagl.com.au>
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Sent: Mon, October 19, 2009 9:56:35 PM
Subject: Re: [NSRCA-discussion] YS points of interest

Thanks Chris, but its hardly worth an article????...... I'm far from a YS genius. I have come across a few in my time however.....just look for the guys with the blown off props and spinners, deadsticks and always  're-tuning' their motor (usually in the pits). Nothing scares me more than some peanut 'tuning' a YS at full song in the pits!!

I'm sure we all know these experts ...trust me...they exist, even down here!!! But funnily, the guys that couldnt get a YS to run are now also having trouble with electric. Interesting? hehehehehehehehehe

Now the CDI....keep those Boxes cool. It MAY help....but the CDI is another story which I am only just learning to read!

Maybe I'll take a few pics and scribble something about what I do...

Tom

________________________________
From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of krishlan fitzsimmons
Sent: Tuesday, 20 October 2009 2:01 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] YS points of interest

Good tip's Tom!

Would make a nice Kfactor article. hint hint [https://vpn2.safelnk.net/a/i/mesg/tsmileys2/,DanaInfo=mail.yimg.com+03.gif]

Chris

________________________________
From: "Koenig, Tom" <Tom.Koenig at actewagl.com.au>
To: NSRCA <nsrca-discussion at lists.nsrca.org>
Sent: Mon, October 19, 2009 6:49:33 PM
Subject: [NSRCA-discussion] YS points of interest

Hi all,

Just a little topic diverter, for all us 'oilers'.

Some background. Generally in Aus, most people mix their own fuel as it is simply too cost prohibitive to use pre-mix. 99.9% use the Coolpower oils. We have the three types available; Blue (SV), Red (LV) and Purple(MV).

I have just rebuilt 3 different YS motors,all running on different oils. Nitro content is 25-30% depending on motor and application, Nitro brand is VP. The  methanol was Spectro C analysed for purity and water content ( perfect results)

I have found: ( your mileage may vary <VBG>)

The LV oil produces marginally ( empirically tested) power, however significant corrosion and wear was found in the motors using this oil. Cam was badly worn also.

The standard Blue oil motor had by far the least wear, virtually no corrosion and only small expected, standard wear ( liner, bearing play and ring gaps. Cam was perfect)

The MV oil, which as expected, was somewhere in between the two.

Conclusion for my own future use:

I will cease to use the Heli oil in my motors as of now, unless I need to milk a motor for every last bit of power OR if I am happy to rebuild more often.

The MV does seem like a good compromise, but I'm happy with the Blue oil. Its the original, and in my opinion only, still the best general performing oils of all.

Also-IF any of you are actually still using the YS, here are a few other tips. I have two brand new 170's-one CDI and one Glow. Both motors had virtually NO oil in the cam area out of the box. I would recommend that you open the cam cover and squirt it full of oil before you start these for the first time. I feel it helps and may just prevent undue cam wear.

I always strip, rework and Ultra sonically clean my motors before I run them-so I do this anyway, but for those that don't want to go to these extents-The oiling of the cam is easily done.
Another little tip-lap the valves in. I just use one of those eraser tipped pencils, cyno'd to the valve, and then spin the pencil with some fine valve grinding paste on the seat. This works a treat, every time.( obviously, disassemble the head first)

Now feel free to practice those snaps that we talked about ,with that little powerhouse of an engine <G>

Tom

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