Supertigre gs 45 quiting during idle  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       


Cermark Viper Jet in Camouflage RTF with Jetcat P-120 - RTF
Seller:  rickj202
Details:   $4,150.00   |  10/3/2008   |  Classified Ad
We will rotate YOUR AD in this spot if you select "Forum Featured" when placing or editing your ad!

All Forums >> RC Airplanes >> Beginners >> Supertigre gs 45 quiting during idle
Page: [1]

Login
Message << Older Topic   Newer Topic >>
Supertigre gs 45 quiting during idle - 7/4/2008 10:10:01 PM   
navihawk


 

Posts: 129
Joined: 11/23/2005
From: Orlando, FL, USA
Status: offline 		Hello everyone. ive been flying nitro planes for like a year now but just a trainer with a la40 on it. I bought a new gs 45 and did the break in i.a.w the manual. I installed it on a funtana X50. I love flying it and it flies very good. Ive spent a lot of time reading and trying to set the low speed and high speed neddles. When im flying it flies fine, but when i land and taxi around it usually quits. Ive tried so many times to set it up properly and sometimes it doesnt quit, but it usually does. I have no problem turning it on and im using a os A3 glow plug with 5% nitro fuel and a 11x3 prop. Also when i go to idle on the ground i notice that when i throttle down the engine doesnt go down to idle, instead it slows down but still spins a little fast and the gradually goes down to idle but it doesnt quit, until like when im flying and land. Anyone ever had this problem before? Im thinking that the low speed neddle is a little ritch from what ive been reading. Can anyone help me. Thanks.
       Post #: 1

RE: Supertigre gs 45 quiting during idle - 7/4/2008 10:22:28 PM   
ro347


 

Posts: 756
Joined: 7/4/2005
From: Nutley, NJ, USA
Status: offline 		I cant help you on this without confusing you more...but I hope you get it figured out. Its a GREAT engine...especially for the money. AMAZING power. Good luck & dont give up on it. Once you figure it out, you';ll really enjoy the engine and be glad you did.

(in reply to navihawk)
       Post #: 2

RE: Supertigre gs 45 quiting during idle - 7/4/2008 10:34:25 PM   
Dorsal


 

Posts: 248
Joined: 4/21/2005
From: Tracy, CA, USA
Status: offline 		I have read that most idling problems with the SuperTigre engines were due to the lack of muffler back-pressure, and that also caused the mixture needles to be extremely sensitive. I remember reading a post about a guy that removed his muffler and shoved a bit of steel wool into the muffler before re-installing it and that solved all his problems. You might try it yourself, or search around for the info, but that was over a year ago I saw it and have no idea where it was.

(in reply to ro347)
       Post #: 3

RE: Supertigre gs 45 quiting during idle - 7/4/2008 10:36:27 PM   
combatpigg



Posts: 9827
Joined: 11/22/2003
From: arlington, WA, USA
Status: online 		The performance of the entire system is based on a consistant pressure seal at the muffler, no pressure leaks in the crankcase, good compression seal of the piston / liner, no atmospheric leaks at the carb, perfectly sealed tank and plumbing and no crud anywhere in the fuel lines or carb. How much of this can you easily control? Quite a lot.
You can go back and forth with needle settings, different plugs and fuels.......some changes will mask symptoms or bad tendencies that the engine has built in, some might fix the problem.
I suspect that the slow ramping down of rpm after you close the throttle could be caused by the high speed needle being too rich and the low speed needle too lean. Is this engine equipped with a low speed needle, or is it an airbleed screw?
If you have faithfully followed the instructions, then I have to wonder if some of the variables that Super Tigre has no control over [but you do] are not up to snuff.

_____________________________

Led Zeppelin is NOT "old fogie" music.

(in reply to navihawk)
       Post #: 4

RE: Supertigre gs 45 quiting during idle - 7/5/2008 1:18:47 AM   
navihawk


 

Posts: 129
Joined: 11/23/2005
From: Orlando, FL, USA
Status: offline 		Thanks for all the help. I do know some things bout recep engines such as the small rc engines, so i might have mislead some of you to think that i didnt know anything. The engine has a scew that goes inside the throttle arm to change the idle mixture. while tunning it today i had to turn it almost 180* clockwise which is leaning it , but now it ran urnning better and when i throttle back it does it a lot better and quicker, but i ran out of glow plugs and gota wait to test thew new settings with a brand new plug. I do notice that when the engine would shut off after landing when i would pick up the model, i would hear a hissing sound coming from the engine, not 100% sure where its coming from but i think its the carb. Im guessing thats built up preassure from the tank?

(in reply to combatpigg)
       Post #: 5

RE: Supertigre gs 45 quiting during idle - 7/5/2008 4:24:19 AM   
horace315



Posts: 697
Joined: 9/23/2003
From: va beach, VA, USA
Status: offline 		sounds like it is running too lean that hissing is fuel bubbling from overheating.get the high end set right first then worry about the low end adjustment.

_____________________________

Be thankful we''re not getting all the government we''re paying for.

(in reply to navihawk)
       Post #: 6

RE: Supertigre gs 45 quiting during idle - 7/5/2008 4:43:14 AM   
navihawk


 

Posts: 129
Joined: 11/23/2005
From: Orlando, FL, USA
Status: offline 		yeah that sounds prett good. all of the glow plugs i have replaced have a dark brown or burnt look around the base where the coil rests on and the coils are usually burnt. That means that ive been running too lean right

< Message edited by navihawk -- 7/5/2008 4:46:11 AM >

(in reply to horace315)
       Post #: 7

RE: Supertigre gs 45 quiting during idle - 7/5/2008 5:18:35 AM   
combatpigg



Posts: 9827
Joined: 11/22/2003
From: arlington, WA, USA
Status: online 		Set the high speed needle at wide open throttle with the nose of the plane pointed straight up and the tank 1/2 full. You should be able to pinch the line quickly and hear a slight increase in rpm. The other method is to peak the engine while looking at a tach, then back off 500 rpm. I haven't run a SuperTigre since they went from being Italian made, those engines were very well made and they had a very loyal following.

_____________________________

Led Zeppelin is NOT "old fogie" music.

(in reply to navihawk)
       Post #: 8

RE: Supertigre gs 45 quiting during idle - 7/5/2008 6:07:43 AM   
ply2win


 

Posts: 96
Joined: 9/25/2005
From: Orlando, FL, USA
Status: offline 		Navihawk,

I see you are from Orlando, where do you fly at?

I have a couple of the Supertigre 45 engines and they really are great engines. Personally, I could never see spending a lot more on other brands when these work so well.

What you were saying about your idle problem sounds like the low speed needle was too rich and I think you discovered that when you leaned it out. The advice you received about doing the pinch test is a great way to make sure you aren't running the high speed too lean.

As far as the hissing goes , I think that is from overheating. It is tough to keep the engines cool living down here where it is always hot. I have a problem sometimes restarting a warm engine because the fuel is vaporizing before it reaches the carb. The only solution I have found is to let it cool or to use the electric starter.

(in reply to combatpigg)
       Post #: 9

RE: Supertigre gs 45 quiting during idle - 7/5/2008 5:35:35 PM   
navihawk


 

Posts: 129
Joined: 11/23/2005
From: Orlando, FL, USA
Status: offline 		I fly by boggy creeck and 417 a big open field there. lots of guys go fly out there. gona go there today and test the new settings

(in reply to ply2win)
       Post #: 10

RE: Supertigre gs 45 quiting during idle - 7/6/2008 1:22:15 AM   
ply2win


 

Posts: 96
Joined: 9/25/2005
From: Orlando, FL, USA
Status: offline 		I never knew that anybody flew in that area. The club I fly at isn't that far from where you go. It is on Narcoossee by 528. If you ever want to fly at a club it is a pretty good place, they don't have a lot of "rules"

So how did it go with the engine today?


(in reply to navihawk)
       Post #: 11

RE: Supertigre gs 45 quiting during idle - 7/6/2008 5:12:03 AM   
navihawk


 

Posts: 129
Joined: 11/23/2005
From: Orlando, FL, USA
Status: offline 		well i didnt get to go. yeah we used to fly where the truck drivers usd to train. When that cdl company got busted it was all free with no traffic. Big paved lot, but the city put up no tresspassing signs up and we got kicked out. if you go to where we fly now on a sunday morning youll find about 20 to 30 people flying out there. Everything from trainers and foamies to big 3d ships and lots of helis. Ive seen that field on narcoosee. I go near there by narcoosee and moss park. I go fly the trex 450 with a friend. Got some new os #8 glow plugs and will try them tomorrow.

(in reply to ply2win)
       Post #: 12

RE: Supertigre gs 45 quiting during idle - 7/9/2008 5:48:32 PM   
opjose



Posts: 5832
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline
quote:

ORIGINAL: Dorsal

I have read that most idling problems with the SuperTigre engines were due to the lack of muffler back-pressure, and that also caused the mixture needles to be extremely sensitive. I remember reading a post about a guy that removed his muffler and shoved a bit of steel wool into the muffler before re-installing it and that solved all his problems. You might try it yourself, or search around for the info, but that was over a year ago I saw it and have no idea where it was.


This is not needed.

The provided muffler produces more than enough pressure. If tuned properly the engine will run on the ground at all throttle settings w/o ANY muffler pressure connection, although I'd never fly the plane this way.

It is more likely that there is a leak, or that too much pressure differential is required to move the fuel. Often this is due to poor or bad plumbing practices.

I've helped people with the same complaint and ideas on how to fix it, by merely shortening the fuel tubing.


BTW: The ST's like the heavier APC props, which helps them idle. They do rather poorly on the lighter MA and wooden props.



_____________________________

-
Build em'', fly em'', crash em'' and build more.

(in reply to Dorsal)
       Post #: 13

RE: Supertigre gs 45 quiting during idle - 7/10/2008 11:06:09 AM   
flyX


 

Posts: 628
Joined: 7/24/2007
From: el centro, CA, USA
Status: offline 		yeah..My guess is not enough prop. A 11x3 on a . 50 size engine ?
A prop also acts like a torque convertor or a harmonic balancer for an engine.
Kind of like a lawn mower won't start or stay running if you remove the cutting blade.

If you don't put enough load on the engine..it can cuase the engine to run above it's design
operating rpm range. The engine will run hotter..of course due to more ignitions.
But most important it'll stretch the rod over time.


Actaully some prop acts in reverse of a harmomic balancer

The harmonic balancer fell out of my truck before...it didn't idle too good.lol

< Message edited by flyX -- 7/10/2008 11:56:37 AM >

(in reply to opjose)
       Post #: 14