Need help on engine!!!!
11-02-2004 | 02:28 AM
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From: , AUSTRALIA
Need help on engine!!!!
Hi,
Recently l bought a Evo50. l used ~ 4 tanks of fuel (AT Racing: 15% nitro 20%oil) to break in.
After that, l forced to set the needle to about 1/2 turn out from fully close or a few more clicks out in order to have enough power to lift off.
This is not right l guess becase as a new engine, the needle shouldn't be only half turn out for 15% nitro fuel.
If l make it to 3/4 out, it produces huge of smoke and doesn't want to take off before 75% of thottle and it sounds very rich.
then l tried to use a different fuel (10% nitro 20% oil), the different is another 1/5 turn out compare with AP racing fuel.
l'm not sure this problem is caused by the fuel or what, but when l tried different fuel, it has no big difference on the needle setting but only around 1/5 turn.
Anyone is flying a new Evo50 here? what is your engine setting?
Or could anyone give me an answer why my engine is running so lean?
Thanks in advance
Edmond
My pitch curve is -2, 2, 5.5, 7,9
thottle is linear from 0-100%
Recently l bought a Evo50. l used ~ 4 tanks of fuel (AT Racing: 15% nitro 20%oil) to break in.
After that, l forced to set the needle to about 1/2 turn out from fully close or a few more clicks out in order to have enough power to lift off.
This is not right l guess becase as a new engine, the needle shouldn't be only half turn out for 15% nitro fuel.
If l make it to 3/4 out, it produces huge of smoke and doesn't want to take off before 75% of thottle and it sounds very rich.
then l tried to use a different fuel (10% nitro 20% oil), the different is another 1/5 turn out compare with AP racing fuel.
l'm not sure this problem is caused by the fuel or what, but when l tried different fuel, it has no big difference on the needle setting but only around 1/5 turn.
Anyone is flying a new Evo50 here? what is your engine setting?
Or could anyone give me an answer why my engine is running so lean?
Thanks in advance
Edmond
My pitch curve is -2, 2, 5.5, 7,9
thottle is linear from 0-100%
11-03-2004 | 03:02 AM
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From: NapierNew Zealand, NEW ZEALAND
RE: Need help on engine!!!!
I have some tuning issues myself,but i wouldnt care about how many turns out the needle is but just tune it till the engine sounds happy.It will soon let you know if it is not! That is all i would do any way!Mine is running about 3/4 open.Watch my post also for some help.
11-03-2004 | 03:52 AM
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From: Coyonkulma, FINLAND
RE: Need help on engine!!!!
Evo 50, O.S 50 SX-H hyper
3/4 turn open from close. Also leaned the mix needle from factory setting to get a reliable idle run. Im flying in a cold weather, around 0 C this time.
I believe your engine is not running lean. It's just the manufacturing tolerance of the carburator that makes the correct mixture be found in a different point.
This is my first heli. Referred to my 4-cycle wing planes this fuel consumption of a heli is terribly high! I have spent more money for fuel to my heli than my car lately!
Im learning heli myself without a "live" instructor. GV-1 and AVCS gyro have been great help. Otherwise I were not able to trim the curves by myself.
Jyrki
3/4 turn open from close. Also leaned the mix needle from factory setting to get a reliable idle run. Im flying in a cold weather, around 0 C this time.
I believe your engine is not running lean. It's just the manufacturing tolerance of the carburator that makes the correct mixture be found in a different point.
This is my first heli. Referred to my 4-cycle wing planes this fuel consumption of a heli is terribly high! I have spent more money for fuel to my heli than my car lately!
Im learning heli myself without a "live" instructor. GV-1 and AVCS gyro have been great help. Otherwise I were not able to trim the curves by myself.
Jyrki
11-03-2004 | 07:27 PM
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From: , AUSTRALIA
RE: Need help on engine!!!!
yea
l think this engine works like that....(a very small open from for the needle)
this may caused by the different shape of the needle (l heard from someone) and l do believe this becasue the other engine's needle is quite sharp but not for the OS 50SX-H
so l think should be alright to fly with 3/4 turn
l think this engine works like that....(a very small open from for the needle)
this may caused by the different shape of the needle (l heard from someone) and l do believe this becasue the other engine's needle is quite sharp but not for the OS 50SX-H
so l think should be alright to fly with 3/4 turn
