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Left to right. W rap the wire end around the shaft and start winding, slowly and evenly I m ust point out that I never wind with the com on, since this will only beinthewaywhenweto lay the wire neatly. The first ten turns are com (wind is 25 of 25). Put the spool pleted on the file and lock with a strong alligator clip. The arm is turned and the second pole wrapped with ten turns from the next spool. Put this spool at the other end of the file and lock About 1.65 to 1.70 inches per winding turn is the figure to calculate with for an average arm, but if you have got a long or a short stack armature, this should be considered. When in doubt, though, take a little extra. That 3d. or so of wire is a cheap insurance against having to rip it off and starting over again because one of the wire lengths was too short. Now, pick one of the spools and start stripping the wire insulation at the end. This stripping should be done with a piece of fine emery paper. X-acto or chemical strippers are not recommended, since knives will easily scrape off too much and chemicals are highly corrosive and therefore dangerous. With the emery paper, sand off the insulation all around the wire, but see to it that the border-line between insulated and stripped wire is a well-defined circle around the wire. Place this wire end at one of the poles, with the insulated part sticking out about 3/32 in. from the pole. See figure. The wire end is twisted tightly around the shaft. Then start winding, turning the handle slowly with one hand and letting the wire run out between the fingers of the other. The first two turns can be wound a shade loosely, but after that you start pulling hard, and I mean hard. I've had 26-gauge wire snap right-off while winding. Wind on 10 turns, making sure that the wire comes on tight and even. A hard pull is essential for this. With these 10 turns on, put the spool on the file and lock it with an alligator clip. The advantage of the file here is the rough surface, which will make the clip stay in position. Note that wire should be tightly stretched. See photosl Loosen the locking screw and turn the armature so that the next pole is available for winding. Don't forget to keep the wire on the first pole tight! It is advisable to be two persons whenever doing this, so that one person can keep the wires tight while the other handles the locking screw and changes armature position. Now repeat the process of insulation stripping and wind until you have your 10 turns on this pole also. Put this spool at the other end of the file, locking it as before. The armature is again turned - tricky business, since the wire on the poles must be kept tightly stretched - and the third pole started upon as before. Mind the insulation business and wind on 10 tight turns. 10
Left to right. Take the third spool and start w inding the third pole. W h en this pole has its ten turns, turn the armature so that the first pole is again available and then change the spools on the file. Really, two persons should work with keeping the wire stretched. Now just continue in this fashion, changing poles and winding until all the poles have been done. Remember to strip the insulation off at this end of the wire, too. Here comes the worst part. Recommended succession: (1) unlock screw, turn armature, lock screw; (2) Remove the clip and lift off the spool belonging to the next pole (i.e. here the first wound); (3) Put on spool from the last (third) pole. Remember, the wires of all poles must be kept tight, so this is really work for two persons. Now we are back on the first pole, so wind on another 10 turns, repeat the exchange process above, wind 10 turns on the next pole, and so on. This, then, is the method of near-simultaneous winding. W e do not always wind on 10 turns at a time; nearing the end we can go down to 5 or even less turns in order to get a symmetric arm. This is dependent on wire size and the number of turns used For example, a 65 of 28 might be wound 10-20-30-40-45-50-55-60-65, a 35 of 26 in 10-20-25-30-35 steps, and a 25 of 25 in 8-15-20-23-25. This is up to you to decide yourself. Mind you, I said it was going to be work, and it needs considerable practise to master. You will curse me loud and long when you first embark on this venture, but after 20 armatures or so this will be Now take a careful look at the arm and be honest with yourself: is this wind really well made or should I do it over? I must take the opportunity of saying that I consider this wind below my usual standard, due to having to get up every few minutes to take photos, arrange lights and so on. So had it not been that this was a ‘how-to' job, I would have done it over if it turned out like this. You should be able to do better. If the wind is considered O K , put a few turns of tape around it and insert in a vice. Use extra pieces of thick paper so as not to mar the shaft. Carefully untwist the wires, sort out the pairs and check that insulation stripping is OK. Twist the wire pairs together - not too tightly, or a wire might snap off. 11
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Page 12 and 13: Left to right. A close-up of what t
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Page 20 and 21: I mentioned that after winding and
Page 22 and 23: Figure 25: M o d d in g the b ru sh
Page 24 and 25: The other end of the shunt wire sol
Page 26 and 27: these if necessary. If you have acc
Page 28 and 29: Tell your friends about Model Cars
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Page 32: Prlmod by Graphic Art Services (Bri

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