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Post by ERJets on Oct 26, 2009 1:08:34 GMT 8
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Post by dennisp on Oct 26, 2009 14:36:54 GMT 8
Nice conversion ER, I have been following the thread on RCG all very interesting. The hole in the top is a practical way forward and you have disguised this well, look forward to some numbers on the fan combination and of course seeing it hit the Singapore skies.  |
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Post by ERJets on Oct 26, 2009 15:05:24 GMT 8
Nice conversion ER, I have been following the thread on RCG all very interesting. The hole in the top is a practical way forward and you have disguised this well, look forward to some numbers on the fan combination and of course seeing it hit the Singapore skies. Thanks Dennis, btw, Bob from RCG reckon that the gap of the wire screen should be wider to allow better air flow. Well, once I have received my ESC, I will power it up to see how it goes before changing the wire screen. |
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Post by dennisp on Oct 26, 2009 16:11:51 GMT 8
Yes I spotted that as the metal is actually reducing the area, let us wait and see how the numbers come out.. One point with the small outlet that I had originally on the Velox the Watts were high and the thrust low as the fan struggling to get the airout, you may have the reverse effect of having a struggle to get the air in..? A test is the real way forward., great stuff this research on EDF really interesting..  |
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Post by ERJets on Oct 26, 2009 16:26:20 GMT 8
Yes I spotted that as the metal is actually reducing the area, let us wait and see how the numbers come out.. One point with the small outlet that I had originally on the Velox the Watts were high and the thrust low as the fan struggling to get the airout, you may have the reverse effect of having a struggle to get the air in..? A test is the real way forward., great stuff this research on EDF really interesting.. Agreed. Oh yes, its really interesting indeed especially comes to EDF scale jets where there are lots of maths involved. |
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Post by dennisp on Oct 26, 2009 16:48:41 GMT 8
So true ER my PC at home is full of EDF spreadsheets  |
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Post by ERJets on Oct 31, 2009 0:49:17 GMT 8
Look what have I done to my ESC. It caught fire when I was carrying out a ground test on 10S.   when the amp draw reached about 100A and out of a sudden, saw some sparks coming out from ESC and next thing I know ...."FIRE"...  My power setup: EDF: Haoye 5' Motor: KB45-08XL 1600kv ESC: TURNIGY Sentilon100A HV Batt: 5S2P5000mah(25-30C)    |
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Post by ERJets on Oct 31, 2009 0:54:30 GMT 8
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Post by dennisp on Oct 31, 2009 5:53:48 GMT 8
AIYO ER that was one big burn out sir, you were lucky that there was not more damage to the model apart from the soot from the burning ESC.
Any idea why the ESC decided to give up...?, you mention you were drawing 110Amps but the ESC is rated at 120Amps so that is not good as far as that ESC is concerned.
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Post by ERJets on Oct 31, 2009 10:42:24 GMT 8
AIYO ER that was one big burn out sir, you were lucky that there was not more damage to the model apart from the soot from the burning ESC. Any idea why the ESC decided to give up...?, you mention you were drawing 110Amps but the ESC is rated at 120Amps so that is not good as far as that ESC is concerned. Yes, count myself lucky that this happened on ground and not during flight.  I have no idea at all on the root caused, my watts meter was showing 100A and the next thing I know... "smokin". I did nothing on the ESC except setting the lipo cell count to 10S. Perhaps it was due to timming setting?? I am not very sure. Infact, this is my second encounter of such incident. Remember my Mirage 2000? Apparently, It seems to be shot down my our DT during flight however it was due to a faulty Turnigy ESC as well. www.erjets.com/cgi-bin/photoalbum/view_photo/394677 |
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