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othello · 01.02.2009, 04:06 PM

>If you run a brushless motor unloaded it can over rev... I would not do that...

Hmm ... as long as motor kv x Volts does not exceed max allowed RPM there should be no issue revving a motor without load (aside from a fast rise in temperature as there is no airflow aroung the motor). The 30 series Lehner motors are specified up to 50000rpm. 50000rpm / 39V = 1282kv. Even the hottest 3080 motor (3080/5) is below that mark with 1050kv which might tranlate to a max of 1150kv with no load. Still safe @ 39V ... but i suppose you chose a kv well below the 1050kv mark.

	(#20)
othello HV basher Offline Posts: 392 Join Date: Jun 2007 Location: Austria (Europe)	01.02.2009, 04:06 PM >If you run a brushless motor unloaded it can over rev... I would not do that... Hmm ... as long as motor kv x Volts does not exceed max allowed RPM there should be no issue revving a motor without load (aside from a fast rise in temperature as there is no airflow aroung the motor). The 30 series Lehner motors are specified up to 50000rpm. 50000rpm / 39V = 1282kv. Even the hottest 3080 motor (3080/5) is below that mark with 1050kv which might tranlate to a max of 1150kv with no load. Still safe @ 39V ... but i suppose you chose a kv well below the 1050kv mark. Brushless 1:5 custom 4wd Baja based on 1:8 truggy chassie Jazz 55-10-32, Neu 1515/2Y (1100kv), 9s2p A123 (27v), up to 3.1KW Latest video with eagletree Data inserts: Run on asphalt