Loc: MADRID, SPAIN
07-25-02 10:35 PM - Post#9308
In response to Billme
As I told above, the air trumpes was removed fort the last flight, new needles ajustments were done as your advise and also a new pitch curve was programed increasing a few deg the whole curve and finally the oil mix was increased till 3,5%+ aditive . With all that, hovering at 1200 rpm with a fine smooth engine sound but it loose at least 100-150 rpm as soon as I apply full power.
Only a short flight was done because the engine stops when doing a auto simulation and a blade has impacted with the tail boom when landing but only the tail was damaged.
Back home the plug was checked, it has the ceramic as white as new.
It┤s sure I need more power than the Tanaka is capable to give. A cylinder joint reduction? This engine is not delicate, the first one I owned was ruined using fuel at a 0,4% oil mix (I made a mistake doing the measure) but about 8 liters of fuel at this mixing ratio were needed to damage the piston.
The fuell mix about 3% seems to be right and more oil doesn┤t help me to give better colour tone to the plug.
Carb settings about 1+3/8H & 1+1/2L are very lean for me (may be due to a carb failure)
The air intake trumpet has no influence in this case (at least it doesn┤t help).
I have appreciate plug color changes only if the air filter was put or not At the beginning, when using the original air filter the plug has black ceramic color and as soon as I removed it the black tone was out. That makes me thing that the air filter forces the carb to suck more fuell because it has more problems to suck the fresh air ┐right?
The last chance I will give to this carb will be open the needles a lot, may be about 2 H and 2 L looking for the opposite side of the story, a richer setting, and start from there leaning the settings. If not, the carb will be replaced and finally the joint redution will be done (must I modify the ignitor advance If the joint was reduced from 0.05mm to 0.03 mm?) If all that fails then I will wait to see the results of Mitch D. with its RC230 adaptation.
Thanks for your patience, Bill. I hope this story can also help you and the all the rest to know more about "when things are going wrong". J
I,ve recently saw Mitch D. web and I thing it┤s not the best time to talk about helis with him. My condolences from here to you, Mitch.