Megatech Horsefly (aka Walkera Dragonfly #10)

The Megatech Horsefly is an easy-to-fly helicopter with counter-rotating blades (they spin in different directions.)  The Megatech version is basically identical to the Walkera Dragonfly #10 (which has been replaced by the Walkera Dragonfly #53), with the only real difference being the decals.  The Walkera-version heli and parts are about half the price of the same items from Megatech.  (I wish I had known that from the start.)

Because of the counter-rotating design the heli is very stable in flight, making it a good choice for beginning flyers.  It's also a fun heli for flying around inside the house (as long as people can stand the noise).  This heli is larger than most
counter-rotating-design helis out there, allowing it fly outdoors though a light breeze.  (Smaller helis can only fly outdoors if there's no wind at all.)  Probably the most popular heli of this design is the E-flite Blade CX.

My experience has been that the green battery that comes with the Megatech Horsefly or Walkera Dragonfly #10 is complete junk (and expensive at that).  I made the mistake of buying serveral of these, and within a few months none of them would hold a decent charge.

On the other hand, I've had really good luck with the "E-Power 7.4V 1200mAH/10C" battery, which is so inexpensive ($18) that even if it doesn't last it's cheap to replace.  It's nice to have serveral so you can swap them and keep flying.  I use the the "Align RCC-3CX" charger to charge these batteries.  I use velcro to hold the battery in place, with a rubber band tied across the bottom of the battery cage for a little extra support.  (Screwing and unscrewing that battery door is way too much of a pain.)

A battery monitor like the
"HRPoly-X low-voltage warning device" from can be used to monitor the battery level to make sure that it doesn't get too low.  (Draining LiPo batteries too low can damage them.)

Adjusting the blade tracking so they're properly aligned makes a big difference in terms of how stable the heli flies.  I like to use the "slapping the paper" method:  Mark the tip of each blade with a magic-marker, red on one side and blue on the other.  Get a piece of paper, and with the heli weighted down (using a hammer or some such across the skis) spin the blades at a moderate rate, and then touch the paper to the blades.  The red and blue marks will show if one blade is running lower than the other, and the pitch links can be adjusted until the marks come together.  The procedure is performed on the top and bottom sets of blades.

The best place I've found for buying parts for this heli (as a Walkera Dragonfly #10) is

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