During the last few moments of preparation your mind may be elsewhere anticipating the excitement of the first flight. Because of this, you may be more likely to overlook certain checks and procedures that should be performed before the model is flown.To help avoid this, a check list is provided to make sure these important areas are not overlooked. Many are covered in the instruction manual, so where appropriate, refer to the manual for complete instructions. Be sure to check the items off as they are completed.
❏ 1. Check the C.G. according to the measurements provided in the manual.
❏ 2. Be certain the receiver is securely mounted in the fuse. Simply stuffing it into place with foam rubber is not sufficient.
❏ 3. Extend your receiver antenna. ❏ 4. Balance your model laterally as explained in the instructions.
❏ 5. Use threadlocking compound to secure critical fasteners such as the set screws that hold the wheel axles to the struts, screw-lock pushrod connectors, etc.
❏ 6. Add a drop of oil to the axles so the wheels will turn freely.
❏ 7. Make sure all hinges are securely glued in place. ❏ 8. Reinforce holes for wood screws with thin CA where
appropriate (servo mounting screws, wheel pants screws, etc.).
❏ 9. Confirm that all controls operate in the correct direction and the throws are set up according to the manual.
❏10. Secure connections between servo wires and Y-connectors or servo extensions, and the connection between your battery pack and the on/off switch, with vinyl tape, heat shrink tubing or special clips suitable for that purpose.
❏11. Make sure any servo extension cords you may have used do not interfere with other systems (servo arms, pushrods, etc.).
❏12. Balance your propeller (and spare propellers). ❏13. Tighten the propeller nut and spinner. ❏14. Place your name, address, AMA number and
telephone number on or inside your model.
❏15. If you wish to photograph your model, do so before your first flight.
❏16. Range check your radio when you get to the flying field.
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The Cirrus SR22 ARF is a great-flying model that flies smoothly and predictably. The SR22 does not, however, possess the self-recovery characteristics of a primary R/C trainer and should be flown only by experienced R/C pilots.
CAUTION (THIS APPLIES TO ALL R/C AIRPLANES): If, while flying, you notice an alarming or unusual sound such as a low-pitched “buzz,” this may indicate control surface flutter. Flutter occurs when a control surface (such as an aileron or elevator) or a flying surface (such as a wing or stab) rapidly vibrates up and down (thus causing the noise). In extreme cases, if not detected immediately, flutter can actually cause the control surface to detach or the flying surface to fail, thus causing loss of control followed by an impending crash.The best thing to do when flutter is detected is to slow the model immediately by reducing power, then land as soon as safely possible. Identify which surface fluttered (so the problem may be resolved) by checking all the servo grommets for deterioration or signs of vibration. Make certain all pushrod linkages are secure and free of play. If it fluttered once, under similar circumstances it will probably flutter again unless the problem is fixed. Some things which can cause flutter are; Excessive hinge gap; Not mounting control horns solidly; Poor fit of clevis pin in horn; Side-play of wire pushrods caused by large bends; Excessive free play in servo gears; Insecure servo mounting; and one of the most prevalent causes of flutter; Flying an over-powered model at excessive speeds.
Before you get ready to takeoff, see how the model handles on the ground by doing a few practice runs at low speeds on the runway. If necessary, adjust the nose wheel so the model will roll straight down the runway. If you need to calm your nerves before the maiden flight, shut the motor down and bring the model back into the pits. Top off the battery, then check all fasteners and control linkages for peace of mind.
Remember to takeoff into the wind. When you’re ready, point the model straight down the runway, then gradually advance the throttle. Gain as much speed as your runway and flying site will practically allow before gently applying up elevator, lifting the model into the air. At this moment it is likely that you will need to apply more right rudder to counteract engine torque. Be smooth on the elevator stick, allowing the model to establish a gentle climb to a safe altitude before turning into the traffic pattern.