YS 160 cutting in flight  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> YS Engines Support >> YS 160 cutting in flight
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YS 160 cutting in flight - 6/17/2008 8:47:34 AM   
maz46


 

Posts: 10
Joined: 7/21/2006
From: , UNITED KINGDOM
Status: offline 		Hi this is my first YS160, I have it mounted inverted, Im now on my 8 tank of fuel, it was a new engine but the problem is that it keeping cutting mid flight, i am running OS F plug and Yamada fuel by model tec which i belivie to be 20% nitro 24% oil, I have had problems starting it but I think thats been covered now in a few posting so that should be sorted. I dont want to run an onboard glow but its the next thing to try, anyone got any other ideas
       Post #: 1

RE: YS 160 cutting in flight - 6/17/2008 2:54:23 PM   
dmccormick001


 

Posts: 121
Joined: 2/13/2005
From: Soddy Daisy, TN, USA
Status: offline 		Probably need a little more info to figure it out. Is it cutting out at full throttle, half throttle, or idle? Are you flying straight and level when it happens, or are you maybe inverted or in a turn? Either way, check the clunk to make sure it isn't hitting the back of the tank and causing a fuel interruption. Is the engine smoking good when it runs? If it is, assume it might be a little rich and lean the high end just a click or two. If it isn't producing a good smoke trail as it runs, try richening the high end one or two clicks. Also check to see that your fuel isn't foaming at high speed due to the tank being in direct contact with the frame. If you think it might be, either pad the tank so it isn't resting against the fuse, or add just three or four drops of Armor All to a gallon of fuel. That will make your fuel impossible to foam.

David

(in reply to maz46)
       Post #: 2

RE: YS 160 cutting in flight - 6/18/2008 12:16:21 AM   
mjfrederick


 

Posts: 584
Joined: 8/18/2006
From: Baton Rouge, LA, USA
Status: offline 		Do you have the YS foam clunk installed in the tank? 24% oil content might be just a tad high for the DZ series from YS. The DZ's tend to like a thinner synthetic lubricant as opposed to castor. 20% oil content is what most YS blends will have. I've heard that Morgan has temporarily discontinued the Cool Power 30% HP Heli blend, but I've had success with the 20% Heli blend. The most important thing, though, is whether or not you have the YS clunk installed. If you do, it doesn't matter if the clunk is hitting the back of the tank.

_____________________________

mjfrederick AMA 275874 NSRCA 4134
Maybe the Dingo ate your baby

(in reply to dmccormick001)
       Post #: 3

RE: YS 160 cutting in flight - 6/18/2008 6:32:35 AM   
maz46


 

Posts: 10
Joined: 7/21/2006
From: , UNITED KINGDOM
Status: offline 		Hi Guys thanks for the reply. Yes I do have the YS clunk fitted. The tank is mount on foam (but I have not looked to see if its foaming), It seem to cut more in the half throttle position, full & low throttle seems ok. When it cuts I can be in any postion (inverted, foward loop just cant pinpoint one point were it cuts). The engine smokes well. Fuel, im not saying it right but it is a mix which model techics sell for all YS engine which is a fully 24% syntheic oil and 20% nitro

Yamada with 23% Klotz Reg Techniplate is a fuel blend approved by the UK distributor for all Yamada engines

http://www.modeltechnics.com/

(in reply to mjfrederick)
       Post #: 4

RE: YS 160 cutting in flight - 6/18/2008 5:36:51 PM   
mjfrederick


 

Posts: 584
Joined: 8/18/2006
From: Baton Rouge, LA, USA
Status: offline 		My gut is telling me one of two things: valve adjustment or over-heating. If it's a valve adjustment, all you have to do is re-set them. If it's over-heating, you may be running a little lean and not realize it. The reason I go to these two is because it sounds like your fuel setup is OK, and it seems like the problem is occuring after the crankcase temperature has risen in flight. Also, your fuel looks like it's a good mix. Then again, you could also be running too rich on the low end (pump adjustment), causing it to load up, and then when you transition through mid-range, it cuts out. Also you said you were running an OS F plug, but did not indicate if you've tried replacing it to fix the problem. Hope one of these solves your problem.

_____________________________

mjfrederick AMA 275874 NSRCA 4134
Maybe the Dingo ate your baby

(in reply to maz46)
       Post #: 5

RE: YS 160 cutting in flight - 6/19/2008 6:42:35 AM   
maz46


 

Posts: 10
Joined: 7/21/2006
From: , UNITED KINGDOM
Status: offline 		Thanks for the input, I have changed the plug, so this weekend I will check to see if the fuel is foaming, overheating and the bottom end mix, I have never change the bottom end as the transition through mid-range seem to be good on the ground but I will have a good and keep you posted

thanks

(in reply to mjfrederick)
       Post #: 6

RE: YS 160 cutting in flight - 7/14/2008 7:53:34 AM   
maz46


 

Posts: 10
Joined: 7/21/2006
From: , UNITED KINGDOM
Status: offline 		Hi all (bad weather as stopped play), update on the 160, Ok fitted new plug again, checked fuel was not foaming (Slightly on the ground, better with being held off the ground), onething that it did when i removed the glow start the revs drop, it still running, anyway i gave it a go and again it died on me about half throttle the engine was not over hot. Next job was to adjust the pump which i did but then found that I had a problem with the firewall maybe coming away, another job to sort first before anymore flying.

Do you still think I am getting to much fuel, which would explain the drop in revs once the glow start was removed(putting the flame out) or should look else were?

(in reply to maz46)
       Post #: 7

RE: YS 160 cutting in flight - 7/14/2008 12:14:45 PM   
dmccormick001


 

Posts: 121
Joined: 2/13/2005
From: Soddy Daisy, TN, USA
Status: offline 		If the RPMs drop when you remove the ignitor, I'd suspect a too-rich setting on low end or regulator or both, especially with a new glow plug. Any time an engine is mounted upside down you may have this kind of problem, since the fresh fuel charge that is pulled into the cylinder falls down right on top of the glow plug, cooling it. You have to get the mixture just right to get it to run well without loading up.

Fix that firewall and then lean it up a little. You may have to clean out the regulator, there may be a minute piece of trash holding the valve open.

David

(in reply to maz46)
       Post #: 8

RE: YS 160 cutting in flight - 8/6/2008 5:54:55 AM   
maz46


 

Posts: 10
Joined: 7/21/2006
From: , UNITED KINGDOM
Status: offline 		Finally got down the field and had a play with the motor, after a lot of tweeking, managed to get a full flight ITS FIRST and then another. half a turn counter clockwise on the pump screw as hopefully sort the problem.

JUST LIKE TO THANK DMCCORMICK & MJFREDRICK for there input

(in reply to dmccormick001)
       Post #: 9

RE: YS 160 cutting in flight - 8/6/2008 1:55:24 PM   
mjfrederick


 

Posts: 584
Joined: 8/18/2006
From: Baton Rouge, LA, USA
Status: offline 		Happy to help!

_____________________________

mjfrederick AMA 275874 NSRCA 4134
Maybe the Dingo ate your baby

(in reply to maz46)
       Post #: 10

RE: YS 160 cutting in flight - 8/6/2008 3:23:40 PM   
dmccormick001


 

Posts: 121
Joined: 2/13/2005
From: Soddy Daisy, TN, USA
Status: offline 		From: Soddy Daisy, Tennessee (yes, that's the town's name, don't laugh):

To: Somewhere in the UK

Jolly Good!

< Message edited by dmccormick001 -- 8/6/2008 3:24:10 PM >

(in reply to mjfrederick)
       Post #: 11

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