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just one guys observation - 6/17/2003 10:04:35 AM   
48chebbie


 

Posts: 452
Joined: 2/6/2002
From: Henderson,ky 42420-3884, KY, USA
Status: offline 		i am quite sure this will open up a GREAT BIG CAN OF WORMS,but,anyway. i own an awful lot of 2-strokes,and with the exception of one or two mds's giving me fits,i have had alot of luck with them,and very happy.now i own quite a few 4-strokes as well,magnum.91's,o.s.120's,saito 91's,120,150, TT.91's,and 2 TT .54's that have been a real pain. and at the end of this list,is an YS.63FZ. that i have yet to mount and run. all of this aside,here is my observation: so many guys at my field and club run YS 4-strokes exsclusively. my gripe is,EVERYBODY that i have ever heard raving about how awesome these engines are,how powerful,how unmatched they are by anything out there,all seem to have one thing in common. here is a couple of examples: one fellow member has a GP kit built .40 size p-51,5.5lbs.RTF.......,with a YS .91 on it.he says,"dude,my 'stang is so fast,nothing matches this engine,pulls the guts out of it" example #2 GP skybolt,.60 size,8lbs. rtf,the guy raves that nothing out at our club can catch it,because of that awesome YS! yeah,YS120!! example#3 new CG ultimate,7.5lbs.RTF says nothing in the world like it,awesome power,untouchable.......,with a $700 YS140DZ parked in the nose!now,my whole point is,there are a few guys in the club that are running the .60 size planes with .91's in them,and .90 size,with 1.20's, and .40 size with .63's in them,and i am not that impressed! do you really have to put the biggest one of these YS's in the smallest airframe,to show their "awesome power" ??? and to add a little more fuel to the fire,that $700 140DZ,i will put one up against my o.s.1.60FX anytime,but i don't mean either in a .40 size cub! fire away

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just one guys observation - 6/17/2003 10:35:22 AM   
edgeguy


 

Posts: 251
Joined: 2/22/2002
From: Cheyenne, WY, USA
Status: offline 		You will have egg in your face if you do a comparison with your OS 160 Fx and a YS 140 DZ. The DZ will smoke the OS period!

THe OS 160 is a great engine but it is no match for the DZ as you will find out in a comparison. THe DZ is the most powerful 2 pound engine there is. Give the comparison a try you'll be impressed.

USe a tach and the same size prop like a 19 X 10 and the DZ will spin that prop 1000 rpm more than the OS.

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I'll take a shot... - 6/17/2003 10:40:33 AM   
Razor-RCU



Posts: 5294
Joined: 3/21/2002
From: Ramona, CA, USA
Status: offline 		NOBODY debates the fact that the YS 4 strokers are the most powerful engines in their respective sizes...

Generally:

1. People that want outstanding performance, such as YS, also want to severely overpower their planes

2. The YS's are generally lighter than the competition so you can go bigger


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just one guys observation - 6/17/2003 11:08:09 AM   
48chebbie


 

Posts: 452
Joined: 2/6/2002
From: Henderson,ky 42420-3884, KY, USA
Status: offline 		well,edgeguy,at quote unquote $700.00 DOLLARS you had better hope it will beat anything,thing about it is,that,in about a year from now,when that YS is in bad need of a rebuild,unless you are flying it on a 7lb. plane,since they are designed for pattern use in the first place,the 1.60fx will just be getting broken in. and if it is dead,i can still buy another one,and the parts to rebuild the first one,and buy another plane with money to spare! since you are the first in i am quite sure will be a line of many to harp on the greatness of that 140dz,show me the justification of the price,compared to the price,just for example of the 160fx,show me what i am gaining in that $400 bucks?

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just one guys observation - 6/17/2003 12:06:44 PM   
BotleRocketWar



Posts: 810
Joined: 1/5/2003
From:
Status: offline 		Why don't you pull out the YS .63...Put it head to head with anything from the .40-.65 range (could probably out turn a Saito .91) and it will have it beat. No contest! It has about 2K on a Saito .72 with the same prop.... There is something to be said about PURE POWER!

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Brian Richman
BotleRocketWar@Aol.Com

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just one guys observation - 6/17/2003 12:21:09 PM   
Ed Cregger



Posts: 7972
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline 		YS engines are great, no doubt. There is only one thing wrong with them, as far as I am concerned. It is that they burn that nasty, super expensive, high nitro glow fuel.

I've gone gas with no regrets. Just a few more glow engines to go and the conversion will be complete.

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just one guys observation - 6/17/2003 4:01:23 PM   
RaceCity



Posts: 1842
Joined: 7/10/2002
From: NotUpNorth, USA
Status: offline 		Seems to me the original post had nothing to do with engine comparisons, and everything to do with overpowering models.

It's ridiculous. Like sticking a blown 427 in your lawn tractor.

What ends up happening is the "modeler" winds up with a wildly fast, unlimited vertical BRICK.

All the rave reviews in the world don't make up for the fact that the model is now simply to heavy to fly well. A heavy model flys pi$$ poor. A heavy model sustains FAR more damage in the slightest of mishaps that a lighter model probably wouldn't have encountered in the first place. Heavy planes are more prone to all sorts of "surprises"...usually bad ones, close to the ground.

It's fashionable it seems to overpower....nobody said it was sensible.

Class Dismissed.

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Rebuilding the YS a year later? - 6/17/2003 4:03:09 PM   
MarkNovack



Posts: 1547
Joined: 2/9/2002
From: Nameche, BELGIUM
Status: offline 		This is a myth caused by an old standard maintanence rule of thumb to rebuild with new bearings each season whether truly necessary or not.

I ran the YS120NC for four years without doing anything to it. Only after I cross threaded the plug and blew it out along with the threads did I have to replace anything. Bearings are fine.

Like any motor it can be ruined by poor handling or feeding it low quality fuel.

I looked at an older magazine last night at a review on the Saito 1.80 which is commonly compared to the YS140L for power. It's not a good comparison because according to the reviewers RPMs, the 180 does not equal the power of the YS140L, which puts it significantly under the capability of the DZ.

As far as gaining something over the OS160, if you fly mostly sport type aerobatics with loopss and rolls and cuban eights and the like, then the YS gives little advantage. In pattern however, especially for the less experienced pilot, the YS allows more precise throttle control and consistency. For 3D, well, 4-strokes have the torque and the YS has such an incredible throttle response that there is a definate advantage.

To answer your question regarding a $400.00 advantage, that is a matter of what your end goals are in flying. In my world, it is a definate yes. For a weekend pilot who does not compete or drive himself and his airplane to the limits of ability , maybe not.

But most of this is opinion. The RPM numbers and results in the air must be felt first hand to really figure out the difference. It's like somebody who does not believe there is much of a difference between a great sport airplane and the latest 2meter patternship. You can't tell them anything until they try it. Then they know.

As far as having too fast an airplane, that is not the advantage of the YS. The YS gives constant speed in the verticals and pulls like nothing else. Speed is always a question of propellor selection along with RPMs. YS 4-strokes are not a good way to make your airplane go fast.

Mark

< Message edited by MarkNovack -- Jun 17 2003 11:08AM >

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just one guys observation - 6/17/2003 5:02:27 PM   
48chebbie


 

Posts: 452
Joined: 2/6/2002
From: Henderson,ky 42420-3884, KY, USA
Status: offline 		as mark has pointed out,which i was not questioning,is that in their element,these engines may be king. they were designed to be pattern ship powerplants. as far as needing a rebuild sooner,the only reason that it seems these engines are so impressive, is because the only way you usually see them is a .91 on a .40 size plane. as for that 140dz,put it on a 15-18lb. warbird,and,all of a sudden it doesn't look,or seem any different than any other engine,and with that kind of a strain on it,it won't last,wasn't designed to. what would make me mad is if i spent all that money,and put it on an appropriate sized plane,and a year or two from now she was tired,i would not be too happy! what this whole thread started over is this:case in point,we took a 454 and put it in a vega,and wow,this thing is awesome,lots of power,alot more than it needs,put that 454 back in the crew cab dually it is suitably sized for,and it ain't all that impressive,throws that vega around like a pup,but,in that truck,it's just nothing that would make you think,wow.

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don't sweat the petty things...........
pet the sweaty things...........

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just one guys observation - 6/17/2003 5:19:39 PM   
bla bla


 

Posts: 1580
Joined: 9/19/2002
From: Oslo, NORWAY
Status: offline 		I think a great many people are harping on about the greatness of YS without have really experienced them. I have been flying(F3A) YS for quite a number of years now... and yes, after experiments with the newer 2 stroke I'm still convinced YS is the way to go by far.
But when it come to sports flying I wouldn't hessitate to recomend something else... YS can be troblesome little ba#tards! They demand a mind set that stays within their aera, the reason they where designed and that's Pattern. They love their pipes, plugs, fuel, props to be the ones the designer created the engines around... start playing with 'em and things go west...big time...and if any YS opperator tells you different, it's simply a very public demonstration that he hasn't spent enough time with YS!
I'm amazed that people will spend the extra bucks (extra being a masive understatment) to have a DZ on a sports model.... must be crazy (and ignorant) in my opinion. It just produces a waiting list for the folks that really need 'em and are equipped with the 1. the equipment and 2. the experience to deal with them.
Enjoy your Os 1.60. a fine engine, period!

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Oh yeah - 6/17/2003 5:56:37 PM   
Hobbsy



Posts: 10836
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		One thing everybody left out of this discussion is the fact that the very best reason on this planet to buy a certain engine is simply because you want it, no other justification is needed. And if it takes $700.00, then so be it.

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just one guys observation - 6/17/2003 10:27:52 PM   
sdt22



Posts: 112
Joined: 8/3/2002
From: Tampa, Fl
Status: offline 		chebbie

As with you, YS engines seem to bother me also. Now of course it's not the performance that bothers me, it's the people who need justification in spending more money. I, like others, occasionally run across a post comparing for example, a ys 63 to a saito 91 or 100. To erase any doubt of my experience, I own the 63 and I also own a saito 72. Now these two engines make for a good comparison: It seems that on any given day one is stronger than the other. The price comparisons mentioned above don't really apply here, because I think I only paid 20$ more for the YS, but however I think they apply in bigger displacements. And as far as power comparisons go, I can't speak of larger displacements for lack of experience.

I think that while the YS engines do create more power than the competition in the same displacement, the overzealous YS owners might have a larger chest puff when making sometimes rediculous comparisons to justify their purchase (if they need other justification).

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just one guys observation - 6/18/2003 2:49:23 AM   
AnthonyH



Posts: 360
Joined: 10/15/2002
From: Murfreesboro, TN, USA
Status: offline 		What about weight? Take a YS and match it to something in the same weight class. Whatever you match it with will probably be stronger because it will have a larger displacement, but less weight. Brute force is great, but sometimes strong and light is right.

My favorite is the, "My YS .91 is as strong as a Saito 1.20!" Well...so...it weighs as much as the Saito 1.20


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Anthony
Murfreesboro, TN

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just one guys observation - 6/18/2003 8:23:53 AM   
wildnloose


 

Posts: 884
Joined: 11/26/2002
From: Owasso, OK, USA
Status: offline 		O.k.-my 2 cents worth:
Its no different that the guy who buys that $600 xmitter thinking it will make him a better pilot. If he is happy with it, who cares?? Its all about having fun with this hobby.


At my field 95% of the planes are overpowered (usually 1 step up), and I'm convinced that some planes perform better when overpowered (oh, and I especially like the guy who put a 91fx on a 40 sized GeeBee, boy was it fun watching him wet his pants).

Personally I bought my ys because I wanted to move my fuel tank on the cg (7+ inches back from firewall), and it was actually the easiest and cheapest way to do it...I'm happy...

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