roth_josh
01-29-2006, 12:21 AM
I am new to this helicopter thing so I need a few questions answered. I bought a used Hawk Sport and I am having some problems with a few things. First problem is I am always having tocorrect left or right with the tail rotor because the blades do not seem to be coming back to center properly. I believe some of the parts may be worn on it so i'm going to upgrade some of the things. One thing is going to be to buy a boom mount for the tailrotor servo as well as the carbon pushrod. Also I noticed my tailrotor blade grips seem to have some play in them. Should I purchase new machined blade grips? I also was looking at the hawk sport bearing upgrade kit. What bearings are included in this kit and is it worth the money? What kind of main rotor rpm should i be looking for for hovering? I tried to set the throttle as per the instructions, but it seemed like the engine was running excessive rpm before the heli was even lifting off the ground. Is there a rule of thumb to start with or a predetermined setting I should be trying to achieve? Please bear with me as this is my first stab at this side of r/c.
Adam Turner
01-29-2006, 03:54 PM
Hay Roth Josh,
If you have a heading hold gyro then the blades will not return to the center when the model is on the ground, but when it is in the air it will find the center automaticly.
You shouldnt need to upgrade to the tail mounted servo yet. To find out if your wire drive is free enough disconnect the ball link at both ends (servo and tail slider) then move it back and forward. If it moves freely then its fine, but if its stiff lube it with some oil and rposition it so it is straight.
The plastic tail rotor grips work fine and if you tighten them up should stip being lose. it they still have excess play in them then you can mount a small shim inside.
The barings upgrade replaces the bushings in the heli, but if your heli contains all baring then it is unnessasery.
Your RPM for hovering should be about 1500 to 1600, check the pitch if the heli it should be about -2 deg at bottom stick 4 degress at center stick and 9 deg at the top. also the throtle curve should be 50% in the middle 0% at bottom. But it depends on your linkage setup. try a curve of 0-20-40-65-100 this should be quite low. you can always increase it.
If you dont already have a pitch gauge then ask to borrow one or invest in one, there very usefull and are always handy.
What Radio, gyro servos engine are you running???
Hope this helps
Adam