I think what everybody is missing in regards to brushless, is that without sensor feedback and the correct controllers, slow speed start/stop/reverse is crap with the standard hobby brushless motors and controllers. People need to dig into the links I provided to understand this. I for one would not want to be near a 100 pound model that had jittery and inconsistent slow speed operation. Reliable slow speed operation is CRUCIAL to the safe operation of these beasts. These are not some airplane out in the field, a boat on the lake, or a car on the track, these are big heavy models making very complex maneuvers often just inches from their operators and others.
Steve On Friday, March 29, 2013 3:01:28 PM UTC-4, Mike Mangus wrote: > > I disagree with the more expensive part. Many of the chinese motors and > escs are very favorably priced. A twin brushless setup for an Strv tank I > built is actually lower cost than the twin brushed motors with the > Sabertooth 2x60 esc. > > My model combat warships have had brushless tech in them for the past > three years. So far, the cost has been the same or lower than the brushed > systems I used to use. > > Mike > > > ------------------------------ > *From:* Jacob <[email protected] <javascript:>> > *To:* [email protected] <javascript:> > *Sent:* Friday, March 29, 2013 12:51 PM > *Subject:* [TANKS] Re: Why not brushless motors?? > > Brushless motors are more expensive, and their corresponding controllers > are way more expensive than brushed motors. Yes, you will get better speed, > control, and space management, but it all comes at a price. The problem > with the motors that you posted is that they are designed for RC airplanes, > and NOT for ground vehicles. They are intended to spin in only one > direction, at very high speed spinning a propeller. You could have a higher > possibility of them burning out when you put them into a sudden reverse > polarity. These ones probably wont have the TORQ needed as the windings are > designed to have a higher amount of airflow over them in an aircraft to > keep them cool. My words is DO NOT use motors that are designed for the > model aircraft industry. (I have been flying RC aircraft for over 30 years, > and I have seen the bad of them running without good airflow.) > > On Friday, March 29, 2013 3:40:41 AM UTC-6, Niels Erik Kristensen wrote: > > Why du everyone use big heavy and week brushed motors? Most of you use > motors that weight about 1 kilo, and only give 350-400 watt-And cost 60 usd > ore more. > Furtermore its dificult to buy regulators to them, so many "tankers" > control there tanks with a system of relays? > > > In my plans i will use cheap, light and powerfull brushless motors, and > real regulators with propotional control in both forward and rewerse-With > brake:-) > > The motor i will use weight about 200 grams, and give about 800 watt on 4S > lipo battery ( 14,8 volt) And i will control the motors with a 50 A boat > regulator-Watercooled and with a max boost to 60 Amp. The regulator give me > full control both forward and reverse, with brake. > > My motor cost under 13 usd!! The regulator cost about 18 usd > > > > -- > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to [email protected] <javascript:> > To unsubscribe, send email to [email protected]<javascript:> > Visit the group at http://groups.google.com/group/rctankcombat > > --- > You received this message because you are subscribed to the Google Groups > "R/C Tank Combat" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/groups/opt_out. > > > > > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
