• ADVICE is worthless unless you understand the WHY as well as the WHAT. Everyone has an opinion on most everything, and unless the context and experience for a suggestion is understood, "your mileage WILL vary".
  • The only thing that you can buy and add to your Heli that will make you fly better is more fuel (burn it).
  • A radio range check that comes up short on the ground doesn’t get better in the air.
  • It’s IMPOSSIBLE to correctly tighten the "prop-nut" on the engine/clutch assembly without something to hold the engine crank shaft, no matter how much Locktite is used. Remove the backing plate or the carburetor and "foul" the crank with a hardwood stick to keep it from turning (NEVER USE a metal tool, and avoid plastic because it leaves particles). A Head Locking tool will also work, but care must be taken not to punch a hole in the piston or bend the connecting rod.
  • Turning the Transmitter "OFF" will not STOP the Heli if it’s chasing you. If you turn the transmitter OFF while the engine is still running, the Heli might do anything, including chase you.
  • Standing with your back against a wall is like being on the wrong end of a firing squad (leave an escape route).
  • After the engine has been tuned, TWO CLICKS on the needle valve is a MAJOR adjustment. Temperature and humidity changes can make the engine run richer or leaner, but one or two clicks should be enough to fix it. If three or four clicks-richer doesn’t fix the problem, look for something else. (Leaky fuel line, crud in the fuel lines, loose muffler, vibration-foam in the tank, dirty carburetor, bad/fouled plug)
  • A loose muffler will cause the engine to run "funny" (mostly leaner, maybe intermittently). The clues are; "black-oil" drippings under the Heli that come from unusual places and/or a Heli with an oil coating all over the side frames (particularly on the muffler side).
  • A muffler that comes loose in the air will make a TERRIBLE sound. Just land before the engine overheats and loses power. Try not to be so distracted that you lose control.
  • Muffler bolts that won’t stay tight, sometimes can be fixed by tightening them while the engine is HOT.
  • Don’t grease the main gear because if you do, it collects dust and dirt and then strips.
  • That high frequency vibration that is seen on the horizontal fin will soon crack it. It also cracks the receiver case; the servo cases and kills the gyro. (Check for a bent tail rotor shaft, bent starting shaft, misaligned clutch, "unlucky" engine-speed resonance.
  • Medium-speed vertical tail-vibration is usually caused by something in the head being bent or out of balance. (check for bent main shaft, bent feathering shaft, main blade balance, flybar balance, flybar paddle pitch.)
  • Tail twitch and/or horizontal-vibration is usually caused by engine mis-tuning. Adjust the mixture to richen-out of the "lean zone" or lean-out of "the four-stroke" zone. Either zone will cause the engine torque to change intermittently and the gyro will twitch the tail to compensate. Gyro gain that is set too high will cause the tail to wag (oscillate back and forth) uncontrollably
  • That little glitch that happened as the Heli flew by (but now seems to have disappeared), is still in there. It’s just waiting for a better time to bite you. (Time for a real range check and a careful servo check, as well as looking for loose or broken parts and wires.)
  • That new, little squeaky/rattle sound that the Heli makes while it’s hovering might be an indication of something loose or broken. It won’t get better. (Time for a rattle and squeak check. Look for dirty bearings, loose parts, broken parts, mechanical interference between two things that might move.)
  • Don’t use rotor blades that have been in a crash, even if they "look OK".
  • A Tail rotor blade will fly as far and as fast as a main blade, and they are usually aimed directly at you. A thrown tail blade will cause the Heli to disassemble itself in short order.
  • Denatured Alcohol when used as a spray cleaner quickly removes the oily film from the exhaust that builds up on skids and side frames. A little wiping is all that’s required to clean the Heli.