reducing voltage - RC Groups
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Jun 12, 2003, 07:55 PM
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reducing voltage

How can I lower the voltage between my battery and my ESC/BEC so I can use one LiPoly battery to fly different planes. it would be nice if I could use a 11.1v to fly my TM and my SlowStick. I know it can be done but I am not very learned when it comes to electronics. I hope this makes sence

Thank you
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Jun 12, 2003, 10:42 PM
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Andy W's Avatar
No, it can't be done.. at least not easily.
Run a smaller prop to compensate for the higher voltage.
Jun 12, 2003, 11:24 PM
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Miami Mike's Avatar


If you decide to try using that much voltage, you might consider getting the heat sink that they make for GWS motors. You'll still be past the recommended limit though.

Your best bet is to forget about using that 3 cell pack and use a 2 cell pack or regular NiCd/NiMH pack instead.
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Jun 14, 2003, 10:38 AM
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Take a look at get a trial version it will help
with most of the elec stuff. CU
Jun 14, 2003, 04:02 PM
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Many people are flying IPS motors with 3-cell LiPo packs. As Andy says, you need to run a smaller prop to bring the current level down. When you increase voltage, you must decrease the loading on the motor to reduce the amps.

However, the 300 motor on your Slow Stick requires a lot more current than the IPS motor on your Tiger Moth. So you need larger, heavier cells to handle the requirements of the 300 motor. The IPS motor, on the other hand, only requires about 25% of the current required by the 300. So the optimum cells for the Tiger Moth will be smaller and lighter than the optimum cells for the Slow Stick.

If you run larger cells than you need on a lightweight aircraft, you will just be carrying around dead weight that you don't need, which will hurt overall performance. You should only think of sharing battery packs between aircraft with similar motors and similar power requirements.

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