Okay...so Im testing myold 1800 ma, 5 cell nicad rec pack by JR. 6 volt. Hooked up to an expanded scale volt meter, it lasts exactly two hours till its almost totqly drained. That sount right?
That sounds wrong. 275 ma x 2 hours = 550 ma. That's less than 1/3 of your 1800 ma pack capacity. I wouldn't fly it!
You shoul be charging at no less than C10 (10% of capacity, 180 ma in this case) for 14-16 hours. Due to charging losses (pack internal resistance mainly), it takes longer than the 10 hours one would expect. If you can charge at 200-250 ma for 10-12 hours, try that. Your ESV may be out of whack. If you can borrow a Wattmeter, charge the pack with it inline. It gives a more accurate idea of energy in or out.