Nick Williams Posted October 30, 2012 Share Posted October 30, 2012 Hi all, What will be the difference in run time (forgetting size & weight) between the two be. The 1800 is a Gens Ace , 2200 is a Turnigy (not Nano-Tech) both 30c. The model is a stock HK Bixler2, 1300kv motor & 40a ESC. Thanks Nick Quote Link to comment Share on other sites More sharing options...
Codename-John Posted October 30, 2012 Share Posted October 30, 2012 it depends how much current your using at any given time, if say you were using a constant discharge of 1.8 Amps the 1800 would last for an hour, where as the the the 2200 would last for an extra nearly 15 mins, Quote Link to comment Share on other sites More sharing options...
Allan Bennett Posted October 30, 2012 Share Posted October 30, 2012 If you follow good practice and use only 80% of your packs, that'll give you 1440 and 1760mAh available. So on the same amps you'll get 22% longer flight time with the 2200mAh pack. BUT, you can't ignore the extra weight (presumably) of the 2200mAh pack. If you fly the same style with each pack, you'll inevitably be using more amps with the heavier pack, so you won't see all of the 22% time advantage. Quote Link to comment Share on other sites More sharing options...
Nick Williams Posted October 30, 2012 Author Share Posted October 30, 2012 Right, so I'm not going to see a massive difference for the extra price & inevitable weight gain. I think I'll order a watt meter to, so I can see what it's drawing from the battery. I'm reading that this motor & prop (7x5e) combo pulls around 11 amps. Nick Edited By Nick Williams on 30/10/2012 20:05:59 Quote Link to comment Share on other sites More sharing options...
Allan Bennett Posted October 31, 2012 Share Posted October 31, 2012 A wattmeter is a must! If it saves you from burning out one motor, ESC, or battery it will have paid for itself. If your motor & prop draw 11A at full throttle, 80% of your 1800 pack should give you 8 minutes flying time if you fly around a full throttle -- longer if you're happy to cruise. Quote Link to comment Share on other sites More sharing options...
Biggles' Elder Brother - Moderator Posted October 31, 2012 Share Posted October 31, 2012 I agree with Allan - a wattmeter is an absolutely essential piece of kit for anyone doing electric power. You have to remember changes in prop can lead to quite considerable changes in current draw and burnt out ESC is not only a loss of that particular item it is potentially severe damage to the entire model BEB Quote Link to comment Share on other sites More sharing options...
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