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HelicopterScale Model RC Helicopters › AH-1S Cobra with Electric Trex 600 mechanic
12-25-2008 02:58 PM  8 years agoPost 1
son nguyen

rrApprentice

san jose ca us

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Hi all.
I just finished my new paint job AH-1S Cobra , as you see is I used Electric Trex 600 ,stock 1220KV motor,60 Hirobo head,60 Xcell tail gear box,Cetury 45 degree gear box,home made main frame for lower the tail unit and longer main shaft,660 main blades ,It had only 1 latch to open the top to change the batteries. This Heli flown over 20 times with no problem at all , I put 3 fans in for blow the hot air out prevent over heating.

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12-25-2008 04:35 PM  8 years agoPost 2
v22chap

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Granger, Indiana

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Did you have a heat problem with the electric motor ??,,, (the reason for the computer cooling fans )

Or was it just a precaution thing that you did ??

Larry C ----------Bergen R/C helicopters

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12-25-2008 05:41 PM  8 years agoPost 3
son nguyen

rrApprentice

san jose ca us

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I had the heat problem before , the motor and speed control got hot so I had to put 3 fans in it , 2 fans blow to the motor and 1 fan on the bottom of the mechanic to suck the hot air out,I used 3 cells Lipo for the fans, after that is no problem at all .

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12-25-2008 06:38 PM  8 years agoPost 4
v22chap

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Granger, Indiana

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Thanks,,, I would have thought there would be no problem ... but I guess heat is heat no matter what it comes from .
I am getting ready to put a bigger electric in my Hirobo super cobra and this helps make my decision on cooling fans or not

Larry C ----------Bergen R/C helicopters

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12-25-2008 06:59 PM  8 years agoPost 5
son nguyen

rrApprentice

san jose ca us

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you better have the cooling fans for the Super Cobra ,specially is in the hot summer ,you can see the Cobra body too narrow ,no windows so the air can not get in and out to circulate the air , How ever I love to have one Hirobo Super Cobra. I had the 60 Electric Huey, Airwolf and MD 500 defender are not using the fans ,no over heat problem because they are all open windows and more room .

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12-25-2008 08:07 PM  8 years agoPost 6
v22chap

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Granger, Indiana

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specially in the hot summer ,you can see the Cobra body too narrow ,no windows so the air can not get in and out to circulate the air the larger fuselages have no over heat problem because they are all open windows and more room .
This was exactly my thoughts ,,
Thanks for the input and the idea of extra 3S batteries to run the fans so as not to draw the mains down more .

Larry C ----------Bergen R/C helicopters

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