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Old 03-28-2011, 03:44 PM
  #2  
cliffh
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Join Date: Aug 2007
Location: Gustavus, Ohio
Posts: 686
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You seem to have a very good grip on things there and your math looks correct.

Just remember that that 166 extra watts with the 4S will also drain your battery quicker. Going from a 3500mAh pack to a 2200mAh pack AND increasing the power drain will reduce your flight time.

Be SURE to keep the C rating in mind also. A 20C 3500 pack is rated at 70 amps. A 20C 2200 pack is rated at 44 amps. You will be around the limit with a 20C pack IF the C-rating is correct....and I always leave a pretty large fudge factor in there.

If you go with shorter flight times and a 2200 pack, be sure to purchase a high C rating battery.

Cliff
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