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Originally Posted by Letum
The RPM is the same, but charging the batteries puts more load on the diesels so you need more throttle to maintain the same speed. [/B]
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When your normal cruising mode at ahead slow, both engines are spinning i think like 100 or 200 RPMs each. Lets be generous and say 200 RPMs, each engine.
WHen in recharge mode, one engine is taken off propulsion and put to recharging the batteries. By default it goes to 500 RPMs for as long as it take to recharge your batts. The other engine remains on purpulsion. What this means is if your noramlly doing 8ish kts with no recharge, your now putting about doing say 4 or 5 kts.
Personnaly, i dont increase speed just to stay at a cruising speed of 8 kts on the surface. For 3 hours a day, i'll be moving about at 4 or 5 kts instead.