Hanger 9 Funtana X50 Electric Conversion   Page 1 

By Chris Brew

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With the steady increase of electric models appearing at flying sites all around the worPrecision Aerobatics Katana MDld, it has been on my mind for .
sometime to join in the ranks and give it a go. Many an hour has been spent surfing the net checking out all of the options available, my favorite without a doubt being Precision Aerobatics Katana MD. With progress being
made on my Fokker Eindecker EIII and not wishing to spend copious quantities of money on a new electric plane at this point in time, it just remained a thought, a thought niggling in the back of my mind on a regular basis.
  Back in October 2008 while flying my Pulse at Geoff's, it became very obvious to me that there was a problem with the OS46ax  that was powering it, so a decision was made to strip the engine and inspect it for the problem. It soon became apparent that there was a problem with the liner and piston. As I had the same engine powering my Funtana and knowing that the Funtana could really do with more power, the engine was pulled and fitted into the Pulse. The idea was to fit the Funtana with a Saito82fs, but due to the bad dollar and the hefty increase in the price of the Saito the idea was shelved and I got back to the Eindecker.
  Some time passed and with the electric thing still niggling away and the dollar still not looking good for the Saito it suddenly occurred to me that I had the ideal model for the conversion gathering dust on its shelf at the back of my workshop. Back on the net, this time researching the conversion, I came across a guy on a forum in the UK that had done a similar conversion on his Funtana. The search begun looking  for the needed parts to complete a similar conversion to my Funtana. A list of available parts was put together and emailed to our resident electric expert Tony.
With an encouraging nod from Tony the order was put in and a couple of weeks later I had the parts in my hand. The set up I choose is as follows: 

Turnigy 50-65C 320kv Outrunner
Turnigy Plush 80A w/ UBEC Speed Controller
Two Turnigy 5000mAh 3S 20C Lipo Packs in series for 22.2 volts
TGS Sport 17x10E Precision propeller

The conversion itself was really quite strait forward. After removing the original glow engine mount, fuel tank, throttle servo and linkage, there was plenty of room in the forward part of the fuselage to fit the battery packs so a battery tray was constructed from light ply and fitted in place. The installation of the motor was made easy with the use of HXT Alloy Composite Firewall Mount, from Hobby King. Two of the original blind nuts were fitted in the correct place so only two of them had to be repositioned, there new positions were marked and new holes drilled. Unfortunately due to an internal brace on the firewall one of the blind nuts could not be used. To get around this problem I glued in a block of spruce and replaced the original bolt with a screw. The positioning of the motor  within the cowl was made easy by the vast array  of adjustment obtainable with the alloy mount.

Battery Tray            HXT Alloy engine mount

Next came the mounting of the speed controller, this also was straight forward, after a trial fit to check for the length and position of the wiring to the engine phase wires, trimming them to length and soldering on the gold connectors the speed controller was secured to the bottom of the engine mount with a couple of zip ties and the wires were run to the engine and also to the receiver

Speed controler                                                                                                          Forward