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HelicopterThunder TigerOther › Can't tune TT RL53H Engine - Help Please
09-04-2009 04:05 AM  8 years agoPost 1
kennethw

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Toronto, Ontario - Canada

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I can't seem to tune my .50 engine properly, hope someone can give me some pointers.

The engine has 2 adjustments, low and high throttle, mid throttle is a combination of both.

The 2 symptons ...

Irritating, but not 'dangerous', the engine cuts when I throttle down after landing (if/when it flies). It does not cut immediately, but it feels / sounds like it is burning all the excess fuel before it slows down and dies. If I increase the idle speed, it will continue to run, but it would just engage the clutch.

Second one has caused me to break the landing gear today. On throttle up, it takes a while to spool up then it suddenly speeds up. However, every so often, as I spool up and the heli lifts off by about 2 meters, the engine just cuts.

Can't figure it out ... Help please.

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09-04-2009 04:15 AM  8 years agoPost 2
TankDirt

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Illinois

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sounds like a bad trasition from low end to high end, Try richening out the low end slightly

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09-04-2009 04:17 AM  8 years agoPost 3
w12martin

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Shantou, Guangdong, China

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Take a look at this thread http://runryder.com/helicopter/t477...highlight=tt+53
There's a lot of information that could help you

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09-04-2009 11:18 AM  8 years agoPost 4
S Bell

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Nova Scotia Canada

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Might be a bad glow plug issue? Maybe you have some silicone contamination at the glow plug? The problem will continue if the stuff is not removed from the exhaust. Maybe it's the carb tuning as you say, but those other areas I'd check if mixture tuning doesn't work.

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09-04-2009 12:18 PM  8 years agoPost 5
SC Raptorman

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South Carolina

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Do you have a gov on this machine ? If so it may need to be reset or calibrated .

Oh what a feeling 3D Flying can be
Magnum Fuels

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09-04-2009 01:47 PM  8 years agoPost 6
kennethw

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Toronto, Ontario - Canada

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Thanks for all the replies.

There is no Governor, but once I get it tuned, I am going to install one.

The Glow Plug is new, the carb is clear, the exhaust is clear.

I need to stop pulling my hair out trying to figure this out as I'll soon be bald.

All help greatly appreciated.

Thanks.

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09-04-2009 02:14 PM  8 years agoPost 7
kc8qpu

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sc

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When you say it just cuts out, does it sound like it is running lean before you land or is it just choking itself out from being to rich? Definately sounds like your low end needle is not adjusted right. Also did you buy the motor brand new or used??? Just asking because if you bought it used there could be a chance the previous owner took the throttle barrel off and messed with the middle needle.

Carpe Diem!!!

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09-04-2009 03:53 PM  8 years agoPost 8
kennethw

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Toronto, Ontario - Canada

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I'm new to Nitro heli's, so I'll try to answer your question by describing what is happening.

For the first sympton, when I land and throttle down, the engine seems to run 'fast' still and takes awhile to slow down. However, when it eventually does (15-20 seconds), it seems to choke and die.

For the second sympton, when I throttle up, it takes awhile for it to spool up, but when it does, it does very quickly. Then, as it lifts off, it suddenly dies.

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09-04-2009 08:26 PM  8 years agoPost 9
jlchapman

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Mapleton, Utah

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I think your Redline is leaning out after it spools up and then really takes off. Measure the temp to see where you are at. How much smoke is coming out?

My best advice is to start from the recommended baseline settings and slowly change the mixture. Start with the low end mixture, then sneak up on the high end mixture. Then fine tune them both. The directions are really good for the Redline. All else fails find a heli buddy to help out.

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09-05-2009 03:03 AM  8 years agoPost 10
kc8qpu

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sc

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It definately sounds as if you are lean on your low end. Especially landing and throttling down. I to went through some growing pains with mine. I went and bought a cheap infared hand held temp sensor to help out. If it were me I would richen up your low end. When turning your low end out (this will richen the mixture) you want to turn in increments equal to on hour. In other words on complete turn is equal to 12 hours. A little bit goes a long ways. If you get the low end rich enough that is starts spittin fuel out of the exhaust your in the ball park and can work with it. Once it is that rich then turn in lean. Make sure you do some hard climb outs to try and clear the pipe and plug. If you get a temp sensor I have noticed my motor really likes to run cold. Mine never really gets over 165 degrees farenheit and still pulls like a freight train.

Carpe Diem!!!

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09-05-2009 04:40 AM  8 years agoPost 11
kennethw

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Toronto, Ontario - Canada

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At idle, I'm dripping fuel from the exhaust ...

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09-06-2009 01:12 AM  8 years agoPost 12
Dino Spadaccini

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USA

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let start over

how much nitro are you running in the motor 30% or 15%

that will help us to help you tune the motor what muffler and what head speeds are you at

RIP Roman JR
Capt USA Align Factory Team Align - Conquer Your heart
Team Futaba

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09-06-2009 01:20 AM  8 years agoPost 13
kennethw

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Toronto, Ontario - Canada

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Hi Dino,

I'm using 15% and a RJX Muffler. The headspeed I'm trying to achieve for this initial tuning is 1500RPM for Normal, and once tuned, 2200RPM for Idle Up.

What I did last night was turn everything back to factory setting according to the manual and try again. Unfortunately I was rained out this morning (now) and can't go 'fly'. What I have noticed on moving all the needles back to 'original' is that my Mixture Metering Screw needed to be closed (turned clockwise) by over 1/2 turn and Needle Value opened (turned counter-clockwise) by about 1/4 turn.

Fingers crossed....

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09-06-2009 02:43 AM  8 years agoPost 14
Dino Spadaccini

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USA

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ok

with 15 % you will have leaner setting just from running 15%
2200 is high head speed and might be hard to get there running 15% the motor will run fine at 2050 ish and for learning the beginning stuff 2000 is fine if your new.

the low end needle is very sensitive you don't need to turn it much to make things happen the mid range needle that is fixed do not adjust the high is just that high that needle come into play after about 70% throttle. i would try the stock settings and see how it goes and keep us up to speed. most likely you will need to lean the top some and the bottom might be fine at the stock setting if it starts then dies or sound rough just lean it a little an 1/8 of a turn at a time and try and spool up to lean and the motor will have a crackle sound to it.

RIP Roman JR
Capt USA Align Factory Team Align - Conquer Your heart
Team Futaba

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09-08-2009 02:08 PM  8 years agoPost 15
kennethw

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Toronto, Ontario - Canada

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An update, I think I got the high end working nicely, but the low end is still a 'problem'.

When I start up, it idles OK, and when I increase throttle, it is hesitating a little but will get up to speed. However, when I lift off, the engine then seems to really spool up as if it cleared a flood and can run. Then when I land and drop the throttle to idle, it chokes and dies.

I think my low end is too rich hence the 'flooding' and bad transition.

I'm going to lean the low end out tomorrow morning, unless there is violent objection.

Thanks.

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09-08-2009 07:05 PM  8 years agoPost 16
Dino Spadaccini

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USA

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good

sounds like your on track just remember the low also adjusts the mid range so you might need to leave it a little rich not much, but lean in at a 1/8 of a turn at a time, the low end is very sensitive in its adjustment.

RIP Roman JR
Capt USA Align Factory Team Align - Conquer Your heart
Team Futaba

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HelicopterThunder TigerOther › Can't tune TT RL53H Engine - Help Please
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