So what we are typically tuning for is around the 65% to 80% opening of the throttle.ġ. The way we tune heli engines is vastly different from how we tune airplane engines (at least what I typically do, or have seen others do it all the time on our field, and so was what I learned from seeing Joe do it).įor airplanes, we sort of push the throttle stick to max position, and tune by watching the engine screaming sound (easy for 2 strokes, not so for 4 strokes).įor helis, like you mentioned, we cannot be tuning the needle while the throttle is at the max, unless one does something crazy like what you are proposing The other big difference is that we almost never really use full throttle (WOT). at 100% throttle and +10 deg pitch, what kind of rpm would I be getting ? Woodies have a limit of 1700 RPM max.ģ. I know its dangerous, but then with adequate help and precautions, would it be an OK way of setting up the needle precisely ?Ģ-Can i attempt to do this with Wooden blades ? or should i wait for CF ones. I know that when LSN is rich the transition is sluggish, so perhaps start from a very rich point and gradually keep on closing the needle till we get it right.ġ- Does this way of setting up the needle sound stupid ? ( the HSN part ). Just get it at the richest setting where the transition from idle to max is smooth and linear. and pinching the fuel line increases the RPM and doesnt cause the engine to fie.
What I am planning to do, is tie the heli (very very very) securely on a car roof, and then under the normal mode (Pitch: -5 - 0 - 10, Throttle: 0-50-100), gradually get the engine to full speed.Īt this point carefully (with a helmet on ) tune the needle, so we get the needle at a point where it is slightly richer than the MAX RPM. I am finding it tough, since I cannot really get to operate the engine at full throttle and still hover.
I have a TT 53 Redline installed in my Raptor 50 and now i have had around a gallon of fuel through it.Time to tune the engine !Īs with airplane engines, I think the first step is to get the high speed needle (HSN) set correctly.
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