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Post by mythotical on Aug 19, 2009 5:48:24 GMT 1
I'll soon be ready to go brushless...
Are there any in runner motors out there to fit the stock SC gearbox for cheap?
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Post by ginginho on Aug 19, 2009 11:21:51 GMT 1
I'll soon be ready to go brushless... Are there any in runner motors out there to fit the stock SC gearbox for cheap? A mate of mine has adapted a inrunner and using the stock gearbox, using the gear off a stock motor. I'm not sure what Kv his is, but he's had to prop down quite a bit to not draw too much through the (relatively small) ESC or over-heat the motor. This is a fairly recent mod, so reliability is not proven as yet. TBH, I don't know what the stock gearing is, you should be looking at around 1000Kv at the prop if you want to use a 9-10". You'll also find that it'll be a fair bit noisier than an outrunner, purely due to the gears/bearings spinning away. |
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Post by flydiver on Aug 19, 2009 15:59:10 GMT 1
Inrunners are for the most part more expensive than outrunners. If they are cheap (like many of the HC ones), it's cuz they are cheap.
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Post by ginginho on Aug 19, 2009 16:36:23 GMT 1
BTW, I forgot to mention, the only reason my mate has an in-runner is because he crashed his EDF  |
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Post by mythotical on Aug 20, 2009 5:41:57 GMT 1
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Post by flydiver on Aug 20, 2009 5:59:54 GMT 1
You are trying to go down a frustrating path.
Currently the stock motor/gearbox + prop are balanced to the NiMh battery output.
1. That is a brushless motor. You realize you have to replace everything to go brushless? Doesn't matter if it's an outrunner or inrunner.
2. If you do go brushless but if you stay with the stock NiMh the battery will be the limitation and you likely will get no more power and some potential for less as the battery won't be able to feed the motor adequately.
Your best economy is to just stay the way your are. Fly it until it falls apart.
Next is to get a lipo and keep the electrics. This incurs a lipo charger + lipo expense but it's the cheapest and most effective upgrade.
Last is the BIG one: Go Spectrum (everyone goes Spectrum it seems) and replace everything.
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Post by mythotical on Aug 23, 2009 5:57:08 GMT 1
Thanks to all for all of the info, and you flydiver for the most reasonable explanation. I at first thought that LiPo's were too high maintenance, so OK, I'll go LiPo.
I'll look at some of the other posts to see but in your opinion...
What is the best cost effective combination of battery and charger I can get?
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Post by mythotical on Aug 23, 2009 6:31:27 GMT 1
I also meant to ask...
I am running a 30A brushed ESC and the stock 7c with a GWS 1080HD prop.
Could I get away with a little more prop for now?
Would it help with power?
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Post by ginginho on Aug 23, 2009 11:42:10 GMT 1
I also meant to ask... I am running a 30A brushed ESC and the stock 7c with a GWS 1080HD prop. Could I get away with a little more prop for now? Would it help with power? I'd suggest getting a watt meter, to know for sure. Many advise this on all sorts of fora, so I got one a while back. Now all my planes (and my mates) are set up nicely. Worth every penny. |
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Post by flydiver on Aug 23, 2009 16:12:45 GMT 1
What is the best cost effective combination of battery and charger I can get? THAT is the subject to serious debate, a lot like saying what it the most cost effective car? There is a mess of opinions in those respective forums. RE- propping up. Don't do it. Electric motors are constant speed devices. They TRY to go a steady speed based on their design and the voltage fed them. If you put too small a prop on it spins easily but you don't get much thrust. If you put too big a prop on the motor can't pull it, it gets hot, and ultimately burns up. For each motor there is a relatively small range of optimal props. Hobby zone has done your homework. Stay with that. If you start changing stuff THEN you should get a wattmeter as suggested and know how to use it. If you don't you pay more than the wattmeter price is burned up motors, ESC, and poor performance. Read this: www.ampaviators.com/index.php?option=com_content&task=view&id=38&Itemid=27There are several articles on props in there. Read them until you understand them. Good site. Do some browsing and reading. |
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