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If you have any handy tips or info please send via.
Contact us opposite.
Please note that all posts and comments are
given in good faith and no liability is accepted from this website to their
accuracy.
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Power Electric |
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| Discharging:
Picked this one up from a mag. cost effective if you are an infrequent
flyer. Connect your Rx pack to a 12 volt car bulb, the bulb will
eventually extinguish once the batteries are flat without exceeding the pack
maximum discharge. You can cycle large mah packs this way - connect and
forget.
Back to Top |
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Charging Time
Formula: battery mah x constant / charge rate mah eg. Std
futaba charger output of 70 mah to charge Tx pack of 700mah requires charge
time of
700mah x constant 1.4 = 980 / charge rate 70 mah = 14hrs.
Here's a handy table:
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Hours |
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Chg. Rate |
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300 |
3.27 |
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4.20 |
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4.67 |
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7.00 |
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9.3 |
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11.6 |
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240 |
4.08 |
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5.25 |
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5.83 |
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8.75 |
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11.6 |
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14.6 |
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180 |
5.44 |
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7.00 |
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7.78 |
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11.67 |
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15.5 |
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19.5 |
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120 |
8.16 |
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10.50 |
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11.67 |
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17.50 |
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23.3 |
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29.16 |
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90 |
10.89 |
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14.00 |
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15.56 |
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23.33 |
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31.1 |
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38.8 |
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80 |
12.25 |
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15.75 |
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17.50 |
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26.25 |
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35.00 |
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43.75 |
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70 |
14.00 |
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18.00 |
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20.00 |
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30.00 |
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40.00 |
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50.00 |
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700 |
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900 |
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1000 |
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1500 |
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2000 |
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2500 |
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capacity |
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Back to Top
| Propeller
Safety calculation - Fibre
Glass Reinforced in order for the water content to stay trapped in the
propeller! Using the formula Constant safe value 3438 (includes a
limiting factor). The maximum RPM of the propeller is governed by the
diameter of the propeller (SI Units: metres).
1" = 2.54cm
11" or 28cm diameter propellers max RPM is:
3438 / 0.28
12,278 RPM
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Last updated:
February, 2007