Been using 3 Tadirans for 2 B-2 motors (pusher) in a small (own design) 170g Biplane for some time without any problems. Tried both 6 and 7 cell packs also. 6 didn't have enough zip, 7 was Ok but didn't last very long. Haven't kept a log on it but would guess at least 2.5-3 hours on the motors, but never run for more than 10-15 min. at a time. The bat don't run down in that amount of time, but I do. Never checked the amp draw.
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