Brushless for Graupner Terry
04-14-2004, 12:33 AM
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Brushless for Graupner Terry
Stock Graupner Terry has a direct drive speed 400 with 6.3x3 folding prop.
Does anyone have any suggestion as far as brushless options go for this plane? I would like to keep the prop and 7cell/1000mAh NiMH batteries that I currently use if possible...
I don't know much about brushless, but would like real vertical performance and I think this is the way to go.
Thanks for any info!
Does anyone have any suggestion as far as brushless options go for this plane? I would like to keep the prop and 7cell/1000mAh NiMH batteries that I currently use if possible...
I don't know much about brushless, but would like real vertical performance and I think this is the way to go.
Thanks for any info!
04-14-2004, 03:34 PM
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RE: Brushless for Graupner Terry
A good brushless fit for the Terry would be the [link=http://www.hobby-lobby.com/mega_brushless.htm]Mega 16/15/4[/link] with your existing prop but the current demands are much higher than the 10amps needed for your Speed 400 motor. The 16/15/4 can draw up to 25amps.
Assuming that your 1000mAh cells are either HECELLS or KANs then you can deliver up to 16-18amps, respectively. This would make the 16/15/5 a better choice for your batteries but you should increase the prop size an inch to a 7x4.
Assuming that your 1000mAh cells are either HECELLS or KANs then you can deliver up to 16-18amps, respectively. This would make the 16/15/5 a better choice for your batteries but you should increase the prop size an inch to a 7x4.
04-15-2004, 01:10 AM
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RE: Brushless for Graupner Terry
ORIGINAL: Greg Covey
A good brushless fit for the Terry would be the [link=http://www.hobby-lobby.com/mega_brushless.htm]Mega 16/15/4[/link] with your existing prop but the current demands are much higher than the 10amps needed for your Speed 400 motor. The 16/15/4 can draw up to 25amps.
Assuming that your 1000mAh cells are either HECELLS or KANs then you can deliver up to 16-18amps, respectively. This would make the 16/15/5 a better choice for your batteries but you should increase the prop size an inch to a 7x4.
A good brushless fit for the Terry would be the [link=http://www.hobby-lobby.com/mega_brushless.htm]Mega 16/15/4[/link] with your existing prop but the current demands are much higher than the 10amps needed for your Speed 400 motor. The 16/15/4 can draw up to 25amps.
Assuming that your 1000mAh cells are either HECELLS or KANs then you can deliver up to 16-18amps, respectively. This would make the 16/15/5 a better choice for your batteries but you should increase the prop size an inch to a 7x4.
The Mega looks like a perfect fit, but I was kind of shocked at the price of brushless in general when I started looking. What about a Himax? They seem much cheaper. Would the
Ha2025-5300 perform well in the Terry? I did read some posts debating the Himax quality...sounds like they would be a good value for my budget and application.
Thanks
04-15-2004, 05:45 AM
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RE: Brushless for Graupner Terry
While the himax will work, there are some downsides. They seem to draw more current than other small brushless motors, their gearboxs seem to be a weak point and several people are using other gearboxes like the GWS to get around it. I use the megas on direct drive and can tell you that they are a good investment. I have not seen the newer, larger himax motor that are coming out. So you are on your own with those.
John
John
04-19-2004, 04:11 PM
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RE: Brushless for Graupner Terry
the terry can not handle a brushless motor unless you strenthin the wing. you can pop it with the motor that it has in to steep of a dive with a little to much up. so be carfull with all that power
