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YS casting quality of 1.40 Sport

Old 10-28-2007, 11:01 AM
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Iflyglow
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Default YS casting quality of 1.40 Sport

I just recieved my new 1.40 Sport from Chief on friday, and I was shocked at the cosmetic looks of the casting work. I do not know if they all look like this, but a $100.00 MAGNUM FOUR STROKE APPEARS TO HAVE HIGHER QUALITY CASTING WORK. The casting of the case has imperfections like crazy (little pin holes and spots that look like cracks and voids that could develope into cracks down the road). I am going to attach some photo's, I hope they show it ok, or I can get some better pic's. Do they all look like this, or Should I send it back to YS performance. I was expecting better quality casting work than this on a $470.00 with 2nd day air shipping engine (central was out of stock). IT LOOK'S LIKE THE KIND OF CASTING WE DID IN HIGH SCHOOL WITH POT ALUMINUM.[X(], NOT TO MENTION THE HUGE METAL CHIP LEFT OVER AFTER MACHINING THAT IS STUCK BETWEEN THE COOLING FINS. I do not remember my previous YS 1.10 to have casting's like this. Maybe the other companies bead blast the castings, but it does not look to be that high of quality the way it came out of box. I know everyone is going to say just run it, but do they allways look like this for the high price they get for these?
Dave
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Old 10-28-2007, 11:33 AM
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Troy Newman
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Default RE: YS casting quality of 1.40 Sport

I can't tell anything from your photos. Resolution is not there to see the problems you speak of....they don't show the imperfections....These imperfections on the outside of the case are not going to affect the running of the engine.

Sometimes the exterior surface of the case can look a little rough. Purely cosmetic on the outside surface. I have never heard of a case failure on the 140....

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Old 10-28-2007, 11:52 AM
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Default RE: YS casting quality of 1.40 Sport

Troy,
I have a friend with a heck of alot better camera than I have, I will see if he can post some pics for me. The porosity does not really bother me, but it has two little voids just in front of the engine beariers on both sides that look like they could turn into cracks. Is this something to just get used too with YS's. They are casting marks that look like a "cold sodder joints" if you know what I mean. I do not know how to explain it different than that. Also, are the 1.40's pretty good out of the box, I know I read a few posts last night when I went through the YS club threads about guys who were instructed to drill out the carb barrel to improve the rich low end. I thought that is why they have an air blead idle adkustment where the first 1.20 did not. Also, do you think I can get by with stock mounts on the Aeroworks YAK .90-1.20. Does the Sport vibrate anymore than say a Saito 1.50 or 1.80. I was looking at the type A hyde mount last night at central but I do not want to buy it unless you really need it. If it runs comparable to a Saito in vibration I think I would just run it solid mounded. I remember watching my friend practace for pattern meets years ago with YS 1.20 AC's and SC's and the engines really twisted around when idleing (soft mounted).
Old 10-28-2007, 12:03 PM
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Default RE: YS casting quality of 1.40 Sport

I have only had one other YS before, but have been around many over the years. I never had any problems with my 1.10 that I flew for three years, but I only put about 15 gallons through it in a 3 year span. Do recommend a 16 or 20 OZ Tettra tank for this engine. The plane should be way overpowered so flying at low throttle settings will probaly conseerve fuel pretty well. Throttle management will definately be order with this application.
Old 10-28-2007, 12:21 PM
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Troy Newman
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Default RE: YS casting quality of 1.40 Sport

The 140 Case has not changed since the 1997 when it was introduced. So in 10 years of service I have never even heard of a 140 case failing.

Yes i know what you mean they can look a little rough sometimes...I don't know why.

16oz tank is fine 20oz is more flying time but an extra 4-5oz of dead weight too.

On the Hyde Mount issue....I prefer them, however I'm not a fan of not using a nose ring on any soft mount it allows the thrust line to change. I know what Merle says about the Type A doesn't need a nose ring. But I will disagree with him a little. If the mount is so stiff it doesn't need a nose ring then its not soft enough to absorb the vibration like I want it to. So I would say if it was my model I would try it without. The 140 Sport is a pretty docile engine. The 140L shakes a little more. I would say the vibes are maybe a touch higher on average than a Saito, but.....Its making more power too. The 120AC's were a pretty high compression engine. They shook a bunch more than the 140FZ or the 140Sport will. The key to a Hyde Mount is that the engines only rotate they don't bounce around....Yes the head can move sometimes 3/8" or more depending on what mount is used and how its setup. But this is OK and is serving the purpose of the mount.

The best way to keep the vibes down is to run in the higher RPM ranges for the engines they don't work as hard and will run smoother. I would say pick a prop and fuel that will give you about 8800rpm for 3D stuff especially. The higher rpms will help the engine spool up faster and respond quicker.

A good starting prop for power and performance is the 15-11 to 15-12. You will likely want to move up to say 16-10 or maybe 17-8 as the nose will be a big round draggy thing. Be careful as you go up in prop sizes the mass of the prop plays a role in the spool up and will also affect the vibration levels. I don't think I would go much above the 17-8, unless its turning over 9000 with that prop. The mass of the 18's can get pretty large...but run it in the rpm range and it will be good to go...8400-8800 is a target for the 140's For 3D it would be better to be in the upper part of this range even approaching 9000 is OK. This means the engine is not working really hard and will stay cooler and respond better when you need it.
Old 10-28-2007, 12:43 PM
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Default RE: YS casting quality of 1.40 Sport

Troy,
So you are saying that I should not need to soft mount it. I was just worried about damage to servo's and the airframe. Is there any other mounts outthere that would help with vibration somewhere between a Hyde mount and a solidmount. I know there are several on the market, but which ones will actually help. Some look like a waste of money.
Old 10-28-2007, 04:35 PM
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Troy Newman
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Default RE: YS casting quality of 1.40 Sport

Using a hard mount is not going to break your airframe or servos.....

Using a hardmount will cause faster wear on the airframe and servos.

There is nothing on the market that comes close to the Hyde mount...and If not using a Hyde I would just Hard Mount it. Like I said in the specific circumstances of this type of model I would hard mount it if it were my model in this case.

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Old 10-28-2007, 07:26 PM
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Default RE: YS casting quality of 1.40 Sport

What about this hyde mount, I will spend the money if it will help, it does not require a nose ring. And central talks like it is a brand new product from hyde, and it is only $79.00 bucks. I will not pay over $100.00 for am engine mount unless it is in my car.
Dave

http://www.centralhobbies.com/Engine...mnts.html#mk3c
Old 10-28-2007, 08:06 PM
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Troy Newman
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Default RE: YS casting quality of 1.40 Sport

I'm sure it will work well. I have no experience witht his mount. I use the ones that require a nose ring. The reason I choose that type is I don't want the thrust line changing in my competition models.

I think it is probably a good mount from Merle. It it were not good he would not make them.

I don't want to disuade you from the Hyde Mounts I think they are the best mounts available but I don't think you have trouble withe the fiberglass mounts....
Just becasue its a YS engine doesn't mean it requires a Hyde mount. The Hyde mounts do have advantgaes, and if you wnat to reap those advantages then I would say use one. You will not be able to effectively install a nose ring on the model you are planning to use it on...so you need to get a type that doesn't require a nose ring.

I don't have a model like yours so I don't know how it will work. I did fly a QQ 72" Yak on a YS 140 Sport with the stock mount supplied. It was ok. The vibration was a bit higher than I'm used to seeing but I was not flying the model everyday like I do my competition models.


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Troy
Old 10-28-2007, 08:43 PM
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Default RE: YS casting quality of 1.40 Sport

Troy,
Thanks for all the imput. Now it is decision time.
Old 11-01-2007, 04:37 PM
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bla bla
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Default RE: YS casting quality of 1.40 Sport

Come on M-man... get with the program.
We're running Hydes, nose rings, hatories, carbon toys and GALLONS of 30% with the YS's... thats the deal... they love em' all, thats what they're design for. Don't start saving now.
Make sure you order a couple of spare diaphrams and O ring sets. Not to mention a couple of leak proof gasset sets and a few rings. Thats see you well for your basic service-maintenence.
I fact, I'd just change the gassets straight away to leak proof. I like to also send 'em in every year for a a full strip down and rebuild by a service senter. They are, as you've promoted several times, specialist kit!

This could be your wake up call after years of beating those that have respectfully suggested that they don't necessarily make the ideal sport engines, up.
16x10 500ml Tetra.
Old 11-01-2007, 07:07 PM
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Troy Newman
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Default RE: YS casting quality of 1.40 Sport

The current gaskets are a similar material as the Leak free's so this is not an upgrade its just a change out...No gain at all. If it was 1998 I would say you should put the leak free gaskets in right away. Today thats not the issue. Yamada gaskets are made from a different material than they were in 1998


Diaphragms don't really go bad to often...They can get deformed but this is usually from sitting with the plunger on them and not moving for long long periods of time. And I mean usually years of no service. Not months. Usually the solution is to just clean it up and maybe flip the diaphragm over and put it back together. Now sometimes they go so deformed that you need a new one but this is pretty rare. I have not changed a diaphragm in many many years. I always changed them before because that was the folk lore.....My experience has been you don't need them....Yes it can make a difference but I would bet 90% of the diaphragms gets changed are not needed.


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Old 11-01-2007, 10:23 PM
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Default RE: YS casting quality of 1.40 Sport

It is interesting that you have that issue with that engine....
I had an engine that had potholes all over it... The casting (I thought was horrible) due to all the potholes.
It ended up developing a leak fro the inside of the engine (it was a 50cc gas engine)
Come to find that this poor casting is caused by not getting the proper silica amount% to metal (or something like that)
I looked inside of the engine and was equally unimpressed...
I talked to the manufacture and they were willing to give me a new engine but I decided to pass and get my money refunded and bought a dif popular 50cc engine...
The casting on say an O.S 1.20 AX is brilliant!! Flawless... And it ran equally as well.. Flawless..
I find it hard to believe that an engine as expensive as one of these would look as crappy as you describe!!
By the way, your picts are not ever clear, so it is impossible to see visually what you are talking about. But what you describe is similar to what I saw in an engine that I sent back....
I personally would not keep that one and get a different engine...
I am very picky though and I demand high quality of a product when I pay top dollar for it.
YS SHOULD KNOW BETTER...

JMHO
Old 11-02-2007, 09:29 AM
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bla bla
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Default RE: YS casting quality of 1.40 Sport


ORIGINAL: Troy Newman

I always changed them before because that was the folk lore.....My experience has been you don't need them....Yes it can make a difference but I would bet 90% of the diaphragms gets changed are not needed.


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Spoken like a true payrollee!
Old 11-02-2007, 11:36 PM
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Troy Newman
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Default RE: YS casting quality of 1.40 Sport

actually Bla Bla if I was on the payroll. I would say buy more regulator diaphrams that way its like job security. At $3 a pop it could be a pretty good income if everybody bought two a year...Then Maybe i could get a paycheck for this deal.

Troy
Old 11-03-2007, 11:49 AM
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Default RE: YS casting quality of 1.40 Sport

confused to say the least....
I back up my prevy statement about the casting quality!
Old 11-05-2007, 01:33 AM
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Troy Newman
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Default RE: YS casting quality of 1.40 Sport

Come on that is not what I said.

This is Support forum, your tone and your comments are not welcome.

Read the rules of the forum,

I told Bla that he didn't need to buy extra diaphrams for his YS engine that the ones with the engine are fine. It was a joke. So if you would kindly take your comments to another area it would be appreciated by other in this forum that are looking for technical support.

Thanks

Troy Newman

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