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Nebula 2000e. 7.2 8.4 ?

Old 09-13-2003, 03:15 AM
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Default Nebula 2000e. 7.2 8.4 ?

Hello Folks

I am new to electric flying but having great fun with my 79" Nebula soarer. it has a standard 600 motor with a Jeti 350 ESC and a 7.2 pack driving an 8x4 folding prop.. It climbs ok under power but could do with a little extra. Would an 8.4v pack be ok to use and would it help a lot ?

Also if after a future replacement motor are all 600 standards the same ? I heard a rumour that 600's can be for 7.2 or 8.4v ?

Any help here is much appreciated

Sean
Old 09-19-2003, 03:04 PM
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Default RE: Nebula 2000e. 7.2 8.4 ?

Hi Spindizzy,
I'm not exactly sure what you mean by a "standard" 600 motor. Generally the 600 number refers to the can size and that's about it. I've seen graupner speed 600's in 7.2, 8.4, 9.6, and 12V configurations (check [link]http://www.hobby-lobby.com/speed600.htm[/link]).

You might go to [link]http://www.slewin.clara.net/elec/tutor.htm[/link] and click on Electric Motors. In the brushed section he has a good description of what the rating numbers mean.
Old 09-19-2003, 09:23 PM
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Default RE: Nebula 2000e. 7.2 8.4 ?

"Standard 600"

Your speed 600 is probably a 7.2 volt (that is the one that is usually used with 6-7 cells and an 8x4 folding prop)

There are 2 things you can do to enhance performance. First more power and secondly decrease weight. What cell are you using in your Battery pack? The new NiMh batteries are much lighter and can put out the needed amps.

Going to a 7 cell pack will increase your power but also have some detrimental effect on longevity of the motor. More than worth it in my opinion. According to P-Calc http://brantuas.com/ezcalc/dma.asp a 7.2V speed 600 puts our 66 Watts and 23 oz of thrust for 25.7 amps with the 6 cell and 86 watts, 28.7 oz of thrust for 30.8 amps with a 7 cell pack. (you would not want to run WOT for long at 30 amps, but I am assuming that this is a powered glider and your run times will be a small percentage of air time)

I would suggest a light/ inexpensive 7 cell NiMh pack such as a KAN 1800 pack to both decrease weight and increase power. http://www.eflightpacks.com/ Or the equivalent at CBP http://www.unipros.com/battpacks/mai...ssion_id=35952

Even better go brushless...

Tim

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