flyeruk Posted May 4, 2019 Share Posted May 4, 2019 Just looking for a rough idea on flight times.Im running a Spektrum Powersafe receiver with two 2200 2s lipos.The ignition is on a separate battery. I'm only flying around fairly gently,no real Aerobatics,just circuits with the odd stall turn etc.The plane is a Wot4 Xtreme. Can anybody give me there thoughts? Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted May 4, 2019 Share Posted May 4, 2019 Why don't you fly it for a couple of times, note the time and then plug in a battery checker and see how much you have left. Quote Link to comment Share on other sites More sharing options...
flyeruk Posted May 4, 2019 Author Share Posted May 4, 2019 I do intend to do that but only had one short flight so far.Going to hopefully be flying more on monday. Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted May 4, 2019 Share Posted May 4, 2019 Typical LiFe battery usage of my models (I won't use LiPos as receiver batteries) is between 70 - 100 mAh for 10 minutes of usually hard flying so unless you're flying incredibly intensively, 4400 mAh of capacity will hardly get touched. Quote Link to comment Share on other sites More sharing options...
flyeruk Posted May 4, 2019 Author Share Posted May 4, 2019 Thats great.Thank you Martin. Quote Link to comment Share on other sites More sharing options...
Adrian Smith 1 Posted May 4, 2019 Share Posted May 4, 2019 Unlike Martin I do use lipos as separate RX batteries. I am using 3.6A 2S Turnigy lipos which may sound like overkill, but they are powering 5 HV digital servos in a 60 cc equivalent electric aerobat (opto ESC). I can report that after 30 minutes of hard flying the voltage still only registers 8.1v after 4 flights on these 2S batteries. So I can't see what's not to like. Do tell. The slight extra weight penalty doesn't have any effect on performance on planes of this size and I know I am not going to run out of RX juice in any one session. Quote Link to comment Share on other sites More sharing options...
Adrian Smith 1 Posted May 4, 2019 Share Posted May 4, 2019 I am of course using a Futaba HV 7008 RX . Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted May 4, 2019 Share Posted May 4, 2019 I have no problem with their performance but I store most of my models indoors and don't fancy removing batteries after every session for safety and before recharging - increasing fault potential from frequent connector cycling. I also dislike regulators and the majority of my models don't have HV servos - LiFe batteries with silicon diodes to drop the effective voltage to @6V during most of their discharge curve suit most of my servos. I'm quite aware that others don't share these concerns and would be able to make a case in support of them - which is why I simply stated that I won't use them in case the OP was confused by my reference to LiFe instead of a direct response to his question about LiPos. Edited By Martin Harris on 04/05/2019 21:46:11 Quote Link to comment Share on other sites More sharing options...
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