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Procharged5.0 · 01.03.2007, 12:37 PM

I understand the 7XL to be a bit "power hungry" compared to the 8XL or 9XL or the Lehner equivalent. 9-Cells @ 4300MAH huh?

I'd say 14-17 minutes, but that's just a guess. Others here my be able to offer something more accurate.

I would also mention that 18 cells would take you above the disirable RPM limits of the 7XL. Consider the 8XL or even the 9XL for more effeciency and it will keep you in the 35,000 - 40,000 rpm range. (a Kv rating under 2000rpm/v would be beneficial, otherwise reduce the number of cells.

	(#14)
Procharged5.0 RC-Monster Titanium Offline Posts: 1,729 Join Date: Apr 2006 Location: Chicago, IL Area	01.03.2007, 12:37 PM I understand the 7XL to be a bit "power hungry" compared to the 8XL or 9XL or the Lehner equivalent. 9-Cells @ 4300MAH huh? I'd say 14-17 minutes, but that's just a guess. Others here my be able to offer something more accurate. I would also mention that 18 cells would take you above the disirable RPM limits of the 7XL. Consider the 8XL or even the 9XL for more effeciency and it will keep you in the 35,000 - 40,000 rpm range. (a Kv rating under 2000rpm/v would be beneficial, otherwise reduce the number of cells. Supermaxx-Racer-X, VBS, FLM chassis & Transcase, HSR Motorsports Slipper, Cage, MMM ESC, NEU1515. REVO 3.3, BL X1-CRT, CRT, BL-CRT.5, Procharged '92 Mustang visit www.chitownrc.com and www.rcbros.com