Matching motors for a twin...
04-08-2004, 11:47 PM
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Matching motors for a twin...
I need to get a set of GWS 400C motors to run as close to identical as possible... in opposite directions. 
Piece of cake right? What I was wondering (and unable to find searching on my own) is what is the best way to match them. Can I get them running equal by adjusting the timing to get identical rpm? Or do I need to match current draw as well?
I only have one speed controller, and I want these to hold up a VTOL, so I’m hopping to avoid getting another to save weight. Any thoughts, or should I go back to using a pair of .15’s…?
I have a little rig set up to help me do the timing thing, but I was looking for a little advice first...
The little red box holds four C cells accross a 1k resistor and a photoelectric sensor (read that as: I don't have a tach, but I have a DMM with a counter, reading current pulses accross the resistor. Works great on my ceiling fan)
Any thoughts? Thanks.
Piece of cake right? What I was wondering (and unable to find searching on my own) is what is the best way to match them. Can I get them running equal by adjusting the timing to get identical rpm? Or do I need to match current draw as well? I only have one speed controller, and I want these to hold up a VTOL, so I’m hopping to avoid getting another to save weight. Any thoughts, or should I go back to using a pair of .15’s…?
I have a little rig set up to help me do the timing thing, but I was looking for a little advice first...
The little red box holds four C cells accross a 1k resistor and a photoelectric sensor (read that as: I don't have a tach, but I have a DMM with a counter, reading current pulses accross the resistor. Works great on my ceiling fan
)Any thoughts? Thanks.
