Top Flite B-25J Mitchell - SETTING CONTROL THROWS AND PROPS; Recommended Throws, Prop Balancing, Battery Charging

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SET THE CONTROL THROWS Use a Great Planes AccuThrow or a ruler to accurately measure and set the control throw of each control surface as indicated in the chart that follows. If your radio does not have dual rates, we recommend setting the throws at the low rate setting. NOTE: For the ailerons, the throws are measured at the widest part (at the root end).
These are the recommended high and low rate control surface throws. High Rate Low Rate ELEVATOR: 1-1/4" up 1" up 1-1/4" down 1" down [32mm] [25mm] RUDDER: 1-1/4" right 3/4" right 1-1/4" left 3/4" left [32mm] [19mm] AILERONS: 5/8" up 3/8" up 5/8" down 3/8" down [16mm] [10mm] *FLAPS: 1/2" [13mm] 1" [25mm] (1/2 fl ap) (full fl ap) * 1/4" [6mm] of down elevator should be mixed in with full fl ap defl ection to control “pitch-up” when fl aps are extended.
IMPORTANT: The Top Flite B-25J Mitchell ARF has been extensively fl own and tested to arrive at the throws at which it fl ies best. Flying your model at these throws will provide you with the greatest chance for successful fi rst fl ights. If, after you have become accustomed to the way the B-25 fl ies, you would like to change the throws to suit your taste, that is fi ne. However, too much control throw could make the model diffi cult to control, so remember, “more is not always better.”
IDENTIFY YOUR MODEL No matter if you fl y at an AMA sanctioned R/C club site or if you fl y somewhere on your own, you should always have your name, address, telephone number and AMA number on or inside your model. It is required at all AMA R/C club fl ying sites and AMA sanctioned fl ying events. Fill out the identifi cation tag on the decal sheet and place it on or inside your model. CHARGE THE BATTERIES Follow the battery charging instructions that came with your radio control system to charge the batteries. You should always charge your transmitter and receiver batteries the night before you go fl ying, and at other times as recommended by the radio manufacturer.
CAUTION: Unless the instructions that came with your radio system state differently, the initial charge on new transmitter and receiver batteries should be done for 15 hours using the slow-charger that came with the radio system. This will "condition" the batteries so that the next charge may be done using the fast-charger of your choice. If the initial charge is done with a fast-charger the batteries may not reach their full capacity and you may be fl ying with batteries that are only partially charged.
BALANCE PROPELLERS Carefully balance your propeller and spare propellers before you fl y. An unbalanced prop can be the single most signifi cant cause of vibration that can damage your model. Not only will engine mounting screws and bolts loosen, possibly with disastrous effect, but vibration may also damage your radio receiver and battery. Vibration can also cause your fuel to foam, which will, in turn, cause your engine to run hot or quit. We use a Top Flite Precision Magnetic Prop Balancer (TOPQ5700) in the workshop and keep a Great Planes Fingertip Prop Balancer (GPMQ5000) in our fl ight box. GROUND CHECK If the engines are new, follow the engine manufacturer’s instructions to break-in the engines. After break-in, confi rm that the engines idle reliably, transition smoothly and rapidly to full power and maintain full power—indefi nitely. After you run the engines on the model, inspect the model closely to make sure all screws remained tight, the hinges are secure, the props are secure and all pushrods and connectors are secure.