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Motor testing
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p51p51
Posted 6/30/2010 12:09 PM (#1645)
Subject: Motor testing




Posts: 107
100
Location: Marana, AZ		Just a quick note to show my test set up. I had it out last night for something else and I thought I'd display here. I test all my NEW stuff this way. On the stand before I put in the plane, and after I mount everything in the plane. I know its double the work but I have not relied too much on the WATT theory. And who really trusts factory specs anyway.I must admit factory is where I get my starting point.  On a side note it was 110* yesterday on the porch out here w/18mph winds. Today at 11:00am it's 100*and wind is 20mph   I think this little Gif says it all



(CIMG1543.JPG)



(CIMG1544.JPG)



(CIMG1553.JPG)



(CIMG1554.JPG)



Attachments
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Attachments CIMG1543.JPG (165KB - 19 downloads)
Attachments CIMG1544.JPG (169KB - 17 downloads)
Attachments CIMG1553.JPG (172KB - 15 downloads)
Attachments CIMG1554.JPG (173KB - 16 downloads)
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ddemu
Posted 7/21/2010 12:38 PM (#1884 - in reply to #1645)
Subject: Re: Motor testing


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Posts: 9
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I like your set-up. How do you compare the thrust (oz/g) to the model weight?
Is it a direct relation, or is there some guideline to follow (calculate) for best performance - such as we do with watts/pound model weight?
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p51p51
Posted 7/21/2010 1:21 PM (#1885 - in reply to #1645)
Subject: Re: Motor testing




Posts: 107
100
Location: Marana, AZ		Well I really don't compare the two. Since most of my flying really is hanging from the prop or some variation of that I just find a Prop/ Motor combo that will produce 1.5 times the weight of the aircraft. I guess that is comparing! I never really liked the watt/lb thing. Although there are 3 classes, I really think modern wing and airframe (lift) have changed so much that it is not accurate for my needs. When your hanging on a prop (wing) lift (w/lb) really will not factor in. The w/lb thing I don't think factors in heat. It may, IDK . But you can take any given set up and put a bigger prop on it and watch the amps go up. More amps = more watts = more power right?? Try is on the test stand and see just how much thrust you LOOSE. But I just use this thing to test the motor and ESC prior to putting it on our planes here. We also use this to spin up our motors before shipping at WingmanRC ! There's nothing worse than saving up for a motor, waiting for it to arrive, getting all ready and it's bad. How good is a warranty then! We will be giving one of these away next week to a qualified test pilot for evaluation. Stay Tuned>>>>>>>>
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