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HomeAircraftHelicopterBeginners Corner › Engine leaning out when out of ground effect?
04-08-2010 09:55 PM  8 years agoPost 1
CUJO

rrApprentice

San Angelo, TX

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It seems that once I get my Rappy 50 (O.S. Hyper 50) up to about 6 feet for a couple of seconds it seems to want to lean out. After blowing my last piston head cause of going too lean I'm worried about doing it now and leaving it at the 1 1/2 turns, but also don't want to waste fuel being too rich either. Am I not tunning it right or do I need to go ahead and lean the idle out too?

Rappy 50 Titan, OS Hyper 50, Futaba 2.4 7ch.

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04-08-2010 11:09 PM  8 years agoPost 2
sliderx

rrApprentice

Meteghan,Nova Scotia, Canada

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Try opening the low speed needle just a bit. It might be all it needs. Maybe.

Raptor 50 V2

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04-09-2010 12:01 AM  8 years agoPost 3
ChrisMoore

rrApprentice

Bay Village, OH

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what kind of pitch curve are you running and what does your throttle curve look like. I wonder if maybe something isnt matching up at the right moment.

Chris. AMA 497715 IRCHA 3351

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04-09-2010 12:20 AM  8 years agoPost 4
CUJO

rrApprentice

San Angelo, TX

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All curves are what the factory recoommends for beginner, according to TT. It does want to choke out on throttle up so I think I might need to adjust the low-end but lost as the nitro guys at the field are just plankers and not much help.

Rappy 50 Titan, OS Hyper 50, Futaba 2.4 7ch.

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04-09-2010 12:58 AM  8 years agoPost 5
foodman392003

rrApprentice

Motorcity,Hockeytown ,USA

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Make sure your air intake is not restricted. Engines will seem to run fine tunning on the ground but in flight they will lean out very quickly.

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04-09-2010 01:20 AM  8 years agoPost 6
Heli0228

rrApprentice

Ripplemead, Va

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Needle setting
Turn the low speed to factory setting, then turn the high speed needle in "clock wise" all the way, then turn the high speed needle out 2 full turns (Rich)"counter clock wise" . Check the air intake make certain there is not dirt or other things to cause a problem. Hover the heli for about 1 min. and land place your finger on the back plate of the engine, if you can hold your finger there for more than 5-8 sec. and it is not hot to the touch and there is lots of smoke then you are RICH. Turn the high speed in " Clock wise" (Lean) 1 or 2 clicks and hover again, check it and if you can hold your finger on the plate for about 2 sec. and then if it is not to hot to hold your finger and then after about 2 sec you have to let go and you have good smoke the enging is where it needs to be. If you can not hold your finger on the plate at all because it is so hot then it is to lean, richen it up some. It is better to warm and engine than to try to cool it down. Just hover and turn the high speed in or out as needed to get the correct temp. Tuning and engine takes practice and it can be learned with some practice just keep track of the temp. as long as it is not to HOT you will be OK. If you have a temp. gun the engine runs about 180 degrees on the plate not the cooling fins.

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04-09-2010 06:28 AM  8 years agoPost 7
dougly

rrApprentice

spokane wash

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TT engine tune
I have a TT 39. I have the low speed opened out 4 turns and the high speed opened to 3 and 3/4 turns. It seems to run just fine.

Doug McKenzie Flying high,fun,and fast

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04-09-2010 07:47 AM  8 years agoPost 8
RAPTOR 4D

rrVeteran

GRANGER,IN,-USA

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Make sure your muffler is not loosening up!
Ive had that issue before with the same results
and I thought it was in the tuning.

Raptor 50 Titan SE

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