Re: Topside Battery
Posted: Jun 18th, 2013, 5:36 pm
Thanks folks. Forward vs reverse: The 1m/S I quoted was with the "ROV" (RUV -more on that later) going astern. I deliberately put the props on with the cupped face pointing backwards to give more thrust to overcome the bulkiness of the motor housing inside the shroud. Had I put them on the other way around then I'm guessing astern speed would have been greater. Anyway, at the time I would say forward was maybe not as fast as reverse. Testing was fairly brief because after the motors started they could not be stopped until the ROV was lifted out of the water. Have some theories on this loss of control. Increase in current when loaded up causing interference, longish motor and logic wires not helping. Yet to be investigated. Dive thruster worked brilliantly, submerging straight down and fast. Quite a bit of force on the tether required to lift against motor! Will add some thin rope next time.
Current draw: No idea whatsoever. Have since gotten a plastic tub so will be able to do water tests at home in future
Run time: No idea but still had power after fooling around for 20 minutes
Battery pack size: 130mm long (had to Google it as ROV is still sealed up and notes not at hand) Similar to this http://www3.towerhobbies.com/cgi-bin/WT ... LXBSPL&P=8 Went for Ni-mh largely because I already had a suitable charger. Aft bottle (hull) was designed for D cells but the 3300 mAh pack was all I could get at the time
Ross
Current draw: No idea whatsoever. Have since gotten a plastic tub so will be able to do water tests at home in future
Run time: No idea but still had power after fooling around for 20 minutes
Battery pack size: 130mm long (had to Google it as ROV is still sealed up and notes not at hand) Similar to this http://www3.towerhobbies.com/cgi-bin/WT ... LXBSPL&P=8 Went for Ni-mh largely because I already had a suitable charger. Aft bottle (hull) was designed for D cells but the 3300 mAh pack was all I could get at the time
Ross