Notices
YS Engines Support Direct support from YS Performance Engines by Dave Shadel

YS 110fz lacks of power

Old 02-21-2011, 06:29 AM
  #1  
Daniel Z
Senior Member
Thread Starter
 
Daniel Z's Avatar
 
Join Date: Feb 2002
Location: SantiagoReg Metropolitana, Providencia, CHILE
Posts: 490
Likes: 0
Received 0 Likes on 0 Posts
Default YS 110fz lacks of power

I have a Ys 110 working with good idle and transition but giving me about 8700 rpms with a 15x8apc, using new ring, so I`m a little disapointed
Changed the valve cover gasket and improved to 9100 rpms , I still think It can be better , all the rest af the engine is very well mantainned

any ideas?

Daniel
Old 02-21-2011, 06:42 AM
  #2  
Zeeb
My Feedback: (41)
 
Zeeb's Avatar
 
Join Date: Nov 2004
Location: St George, Utah UT
Posts: 5,576
Received 50 Likes on 39 Posts
Default RE: YS 110fz lacks of power

Umm....

That's not all that far off what it should be. What percentage nitro fuel are you using? I've got a couple of these little beasties and can get about 9500 max static RPM on an APC 16x6, so if you accept that going down an inch in diameter and up one step on pitch is roughly equivalent, you're pretty close but the nitro percentage will have some bearing on what it'll turn. Have you checked the valve clearances? That'll make a difference as well if those are off, usually too loose.
Old 02-21-2011, 06:43 AM
  #3  
Zeeb
My Feedback: (41)
 
Zeeb's Avatar
 
Join Date: Nov 2004
Location: St George, Utah UT
Posts: 5,576
Received 50 Likes on 39 Posts
Default RE: YS 110fz lacks of power

double post.
Old 02-21-2011, 06:46 AM
  #4  
petec
My Feedback: (58)
 
petec's Avatar
 
Join Date: Jan 2002
Location: Beaver Falls, PA
Posts: 2,078
Likes: 0
Received 3 Likes on 3 Posts
Default RE: YS 110fz lacks of power

It would help to know what fuel you are using. Your numbers are in the ballpark.
Old 02-21-2011, 06:48 AM
  #5  
wcmorrison
My Feedback: (2)
 
Join Date: Oct 2002
Location: Weatherford, TX
Posts: 1,379
Likes: 0
Received 0 Likes on 0 Posts
Default RE: YS 110fz lacks of power

Check your regulator diaphragm.  I had trouble with a 63 that would not get over 8,600 RPM.  Idled well, etc.  Changed the regulator diaphragm and it zipped right up to 10,500 ~ 11,000 RPM.  Been a go'er ever since the change.  Be careful not to lose the little parts when you open up the regulator.

Chip
Old 02-21-2011, 06:51 AM
  #6  
ThumbSkull
Senior Member
My Feedback: (57)
 
ThumbSkull's Avatar
 
Join Date: Mar 2008
Location: Greenwood, IN
Posts: 1,111
Likes: 0
Received 0 Likes on 0 Posts
Default RE: YS 110fz lacks of power

With 30% and a 16x6 Xoar, I get around 9200 peak. That's a lot of prop so I'm not sure why you are disappointed.
16x6 and 15x8 are very similar power factor so your engine seems to be about right.
Are the results not enough in the air? What bird are you motivating?
Old 02-21-2011, 08:07 AM
  #7  
Daniel Z
Senior Member
Thread Starter
 
Daniel Z's Avatar
 
Join Date: Feb 2002
Location: SantiagoReg Metropolitana, Providencia, CHILE
Posts: 490
Likes: 0
Received 0 Likes on 0 Posts
Default RE: YS 110fz lacks of power

I`m using wildcat 20/20, the regulator diafragm seems a little distended but at 4k is ok and transition is good, I will try a new one anyway (thanks wcmorrison)
I`m flying a 3,5kg or 7,7lbs plane (Aerokevlar Panther) and I want more power for vertical lines, and pulling out of torque rolls

Seen posts of people with ys110`s puting 10k+ on a 16x4 or 15x8 is not unususal and is 20% more than mine!

I will change orings too, Any ideas will be well recieved.

Thanks for your help
Attached Thumbnails Click image for larger version

Name:	Ge95182.jpg
Views:	27
Size:	115.7 KB
ID:	1567632  
Old 02-21-2011, 08:38 AM
  #8  
ThumbSkull
Senior Member
My Feedback: (57)
 
ThumbSkull's Avatar
 
Join Date: Mar 2008
Location: Greenwood, IN
Posts: 1,111
Likes: 0
Received 0 Likes on 0 Posts
Default RE: YS 110fz lacks of power

You would probably see 10K+ with a 16x4. It's not as much load as a 16x6 or 15x8.
I'd bet the guys saying they get 10K+ are using a 15x6 and not a 15x8.

For your 7.7lb plane, I'd certainly try a 16x6 Xoar, JXF or APC sport. Those should get you the best static thrust and reasonable top speed.
They will also slow your down-line speeds. Not all mfg's props are equal.
Old 02-21-2011, 09:54 AM
  #9  
bigal126
My Feedback: (18)
 
Join Date: Sep 2008
Location: Strongsville, OH
Posts: 265
Likes: 0
Received 0 Likes on 0 Posts
Default RE: YS 110fz lacks of power

Hi,
I have a related question. I own the 110 fz. I use the 16 x 6 xoar and it works great. Flies the plane fine for my style of flying. However, I took the engine out of my 9.1 pound CG extra and put it in an 7.8 lb bird. For a replacement I got the 110FZS version. Does it take the same prop, or should I use something bigger? Thanks.
Old 02-21-2011, 10:22 AM
  #10  
ThumbSkull
Senior Member
My Feedback: (57)
 
ThumbSkull's Avatar
 
Join Date: Mar 2008
Location: Greenwood, IN
Posts: 1,111
Likes: 0
Received 0 Likes on 0 Posts
Default RE: YS 110fz lacks of power

FZ and FZs are same power just different pump location.
Old 02-21-2011, 03:06 PM
  #11  
tande
Senior Member
My Feedback: (48)
 
Join Date: Dec 2003
Location: Millington, MI
Posts: 990
Likes: 0
Received 0 Likes on 0 Posts
Default RE: YS 110fz lacks of power


ORIGINAL: ThumbSkull

FZ and FZs are same power just different pump location.
With all due respect...The FZs uses a "Sealed crankcase" & the FZ does not...."WHEN" [&o] you can get the FZs adjusted correctly it will pull another pitch# higher than the FZ...Again FWIW... My experience...YMMV...
Old 02-21-2011, 03:28 PM
  #12  
Zeeb
My Feedback: (41)
 
Zeeb's Avatar
 
Join Date: Nov 2004
Location: St George, Utah UT
Posts: 5,576
Received 50 Likes on 39 Posts
Default RE: YS 110fz lacks of power


ORIGINAL: Daniel Z

I`m using wildcat 20/20, the regulator diafragm seems a little distended but at 4k is ok and transition is good, I will try a new one anyway (thanks wcmorrison)
I`m flying a 3,5kg or 7,7lbs plane (Aerokevlar Panther) and I want more power for vertical lines, and pulling out of torque rolls

Seen posts of people with ys110`s puting 10k+ on a 16x4 or 15x8 is not unususal and is 20% more than mine!

I will change orings too, Any ideas will be well recieved.

Thanks for your help
Well my FZ engines will pull over 10k on an APC 16x4W prop, just not enough prop and when it hit the mid 10k range I shut it down and never did try to peak it with that prop. As I said they run in the 9500 RPM range on an APC 16x6 and I richen 'em up to about 9200 RPM for flying initially then see what happens on the uplines and adjust accordingly. I didn't mention it before, but that's with CoolPower 30% heli fuel and although field elevation doesn't affect the YS engines as much, I'm at 4500' ASL here in Utah.
Old 02-21-2011, 04:52 PM
  #13  
Daniel Z
Senior Member
Thread Starter
 
Daniel Z's Avatar
 
Join Date: Feb 2002
Location: SantiagoReg Metropolitana, Providencia, CHILE
Posts: 490
Likes: 0
Received 0 Likes on 0 Posts
Default RE: YS 110fz lacks of power

Well , then I`m missing about 500 RPMs not 1000 as I thought, do you agree?

I have a 16x4w and a 16x7 apc props , will replace the orings, change props, and tach the engine again

I have a MAS 16x6 , Does it worth?
Old 02-21-2011, 05:47 PM
  #14  
still4given
 
still4given's Avatar
 
Join Date: Jan 2006
Location: Victorville, CA
Posts: 1,611
Likes: 0
Received 2 Likes on 2 Posts
Default RE: YS 110fz lacks of power

Check the fit on the rear disc. It should be very close to the the back plate. Also, RPM readings vary greatly from place to place. Did you get more RPM before you changed the ring?
Old 02-21-2011, 07:56 PM
  #15  
Daniel Z
Senior Member
Thread Starter
 
Daniel Z's Avatar
 
Join Date: Feb 2002
Location: SantiagoReg Metropolitana, Providencia, CHILE
Posts: 490
Likes: 0
Received 0 Likes on 0 Posts
Default RE: YS 110fz lacks of power

No, I had about the same 8700 rpms before , that´s why I hoped an improvement with the ring replacement.
Changing the valve cover gasket made it a little better (9000-9200 peak)
I`m just over 500 ASL, have tried 30% while ago but I haven´t noticed changes in performance (dont remember tach readings)

I thought my plane should be on the overpowered side at 7,7lb with this engine that`s why I`m scratching my head

Will watch the rear disc also, thanks still4given

Thanks again for everyone
Old 02-22-2011, 06:44 AM
  #16  
Zeeb
My Feedback: (41)
 
Zeeb's Avatar
 
Join Date: Nov 2004
Location: St George, Utah UT
Posts: 5,576
Received 50 Likes on 39 Posts
Default RE: YS 110fz lacks of power

Don't forget to check the valve clearance while you're at it....

Also, there can be some differences in tach readings depending on who's tachometer you're using. I finally went to a TNC tach as I was getting different readings from, shall I say, less expensive tachs? Now I'm not pushing that particular point here as my 110's will haul a 9lb. model around with authority so the fact that you're having what you think are performance issues with a lighter model would suggest your tach readings may be close. Just a thought.

I've never tried an MAS prop but from my experience with the GS gasser stuff, props can make a tremendous difference on those models and you pretty much have to try different manufacturer's and sizes to get a suitable prop for your particular flying style and a particular model/engine combination. Also, going from 20% nitro to 30% yielded more RPM and a slower idle with the engines being a bit easier to tune when I did the fuel change. You should, I think anyway, be able to notice a difference between the two different fuel nitro levels.
Old 02-22-2011, 10:36 AM
  #17  
petec
My Feedback: (58)
 
petec's Avatar
 
Join Date: Jan 2002
Location: Beaver Falls, PA
Posts: 2,078
Likes: 0
Received 3 Likes on 3 Posts
Default RE: YS 110fz lacks of power

Let me step in here.

You can see a difference between tachs, I lost RPM when I got a new tach when my old tach from the same manufacturer met it's demise. RPM should be a ball park and not an absolute.

Pros make a HUGE difference. An APC is going to retain it's shape at higher RPM and air load than some other thinner props and that will also give you a lower reading for the same diameter and pitch from manufacturer to manufacturer.

Higher nitro content will give you a higher top RPM by a few hundred RPM depending on nitro content. Higher nitro will also give you a broader sweet spot on the needle at the top end and bottom end.

As for the FZ vs. FZs, the FZs made slightly more power but functionally they are the same.

Your RPM readings in your first post are in the ball park and certainly valid for 20% nitro. For comparison I would swing a 15x10 APC at 8800 RPM on 20/20 on the nose of a 1.20FZ.
Old 02-24-2011, 08:56 PM
  #18  
Daniel Z
Senior Member
Thread Starter
 
Daniel Z's Avatar
 
Join Date: Feb 2002
Location: SantiagoReg Metropolitana, Providencia, CHILE
Posts: 490
Likes: 0
Received 0 Likes on 0 Posts
Default RE: YS 110fz lacks of power

Ok, today I bench tested the engine again, with the new Orings and gaskets (and ring)

20% wildcat fuel

15x8 @ 9100-8800 (not stable)
16x4w @ 9900-9600

The only thing not looking good is the diaphragm, its not flat, a little bulged, anyway I can have decent transition
Is this thing enough to steal my missing RPMs?, I know Chip said it does, but I want to know everyone experience

Thanks,

Daniel
Old 02-25-2011, 07:21 AM
  #19  
petec
My Feedback: (58)
 
petec's Avatar
 
Join Date: Jan 2002
Location: Beaver Falls, PA
Posts: 2,078
Likes: 0
Received 3 Likes on 3 Posts
Default RE: YS 110fz lacks of power

8800-9100 RPM on 20% with a 15x8 is respectable RPM. I'm curious what you mean by not stable though.

The regulator diaphram will stretch a little but if its bulged the next step is torn, replace it.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.