I love my Blade CX2 helicopter.  It's very fun to fly and is nimble.  The replacement parts are easily found and it's rather stable indoors and outdoors in calm winds.  Those traits make it a really good helicopter for both an experienced pilot and someone who is just starting out in the world of RC flight.  Another good thing about the Blade CX2 though is its ability to be upgraded and modified.  In this quick tutorial, I'm going to show you a really easy way to add the mod heatsinks to the stock main engines. This will increase the reliability of the motors, extend their life, and help them cool down faster.

 The first thing you want to do is remove the cowling from the copter.  This can be accomplished by sliding the grommets off of the supports behind the engine compartment.  Take the skids and pull them off of the main body.

Once you do this, pick the chopper up and turn it over.  beneath the battery compartment (Which I have removed in the first shot, four screws hold it on), you can see a set of screws that hold the engines in.  One is on the bottom of the little gold gear, the other is on the top of the gold gear.  The first one is easy to get to, but the second one hides beneath the inner shaft's gear.

You only really need to take out one engine when you do this.  Take out the easy to reach screw on the right hand motor.  A very small philips screwdriver for jewelry or glasses would be sufficient for it.

Once you have that screw out, you need to take out the one hiding beneath the inner shaft gear.  You can't really back the screw out without removing the inner shaft gear, so you have to use your screwdriver to turn the screw while pulling gently on the motor on the other side.  By doing this, the motor will eventually come off of the frame but the screw will remain in the hole.  Take the engine and carefully pull it away from the frame like this:

Be careful not to stress the wires too much!  Set the whole thing down on the table gently and grab your heatsinks.  I got these ones for four bucks at the hobby store in Pittsburgh Mills mall.  The model number is EFLH1208 and you can also get them online.

The heatsink will snap into the space between the motors, with the larger set of fins sitting out in front of the motors.  They'll stay there by themselves once they click into their place.

With the heat sink in place, you can now take the engine and put it back into place.  Flip it back over and line up the engine with the screw you have sticking out of the airframe.  Use your screwdriver to turn the screw while holding the engine in place with a few fingers.  Eventually it will plop back into place where it needs to go.  Put the other engine screw in and make sure they are both snug, but not over tight.

The heatsink will sit between the motors, looking kind of like a fish tail sticking out.  When the engines get warm, the heatsink will add extra surface area and help to dissipate the warmth.  You can now put everything back together and make sure it works.  And that's about that!  With this mod, you can hopefully get a longer life and better performance out of your motors.  Happy flying!

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Comments (3)

• |128.2.245.xxx |2009-06-29 07:18:55 ivan  - Thanx
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• |66.44.195.xxx |2009-08-23 06:54:12 GERRY LEE JENKINS  - cx2 flyer
  i could not figure out how to remove the lower gear to remove the motor.
  
  
  
  thank you very much......
  
  
  
  heatsink installed and heli tested
  
  
  
  could not have done it without your help
  
  great pictures and instructions
  
  
  
  thank you, gerry
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• |128.2.245.xxx |2009-08-28 06:36:08 Anna
  This certainly is one of those things that pictures help with. I'm glad I was
  able to help out!
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