[samste]

My Customed Glassed Rc Stryker F27 90mm Edf,    Edf Repacement

This is The Link For the Build of Stryker Edf approx 6 Years Ago

http://forum.rcflyingclub.com/showthread.php?tid=88&pid=19558#pid19558

When a Esc Speed Controller Fails badly they normally dont like Edfs and Full Throttle Input whilst Flying, Though there is also the Other possibility the Edf sucked something through the Edf at Full Throttle.
   
Interesting Fact This Edf Had Over 100 Flights pushing 7 Plus Hours of Run Time

So i Have Decided To Upgrade the Esc Speed Controller to 150 amp Turnigy Plush with Auto Timing Feature.
The Auto Timing Feature is Brilliant for Edfs as gives the Edf the Advance Timing for all throttle Postions, Which in turns give the Edf They smooth quiet Sound not winning.
Turnigy Plush has 0`  6`  12`  18` 24` 30`  Auto
Test showed Running at 18` Motor sounded Rough at half throttle but max output was 108 Amps
Test 30` motor sounded Rough at half Throttle but Maxed out at 128 Amps
Auto Setting Run Smooth at Half Throttle and Maxed Out at 128 Amps
Running 6s 3000Ma Graphene Lipo
Note Full Throttles are only 3-5 Second Bursts and No More as motor Rating is Only 80Amps Max.
Running 5s Lipo, Then Its Closer to The motor Standard Spec

Using The Turnigy Plush Auto There is Also No Need To adjust the PWM Setting (Timing) And Doing The Calc

EG. 1850Kv Motor x 24Volt Lipo X  12 pole Motor = 532800 / 20 =  26640  (27khz)

Another Tip Is to Always Keep the Battery Wires Short from the Esc Speed Controller, The Motor Esc wires can Be as Long as Needed as there going to motor windings anyway.
I either leave the length of Esc Battery Wire as How it came or shorten if a can an inch or two. Thus to Prevent an Inductance Issue.

New Edf Parts
12 Blade High-Performance 90mm EDF Ducted Fan Unit
Warhead 3545-1850KV EDF Motor 90mm
Turnigy Plush-32 150A Speed Controller w/BEC | HobbyKing

   
   

Balnce the Edf to Centre , IUse a Simple Trick of a Pen Lid over the shaft and then Tighten The Screws, Perfect Center.

   
   
   

Then Test the Balance of Edf Blade and add weight etc till it runs smooth. I Found My edf Blade was Preety good from Get go, so i did not Need any additional Balancing.
If Adding weight , i Normally do it Inside the Nose Cone at One Point and then adjust (Turn It every 5mm till i get a smooth sound balanced Fan)
Tiniest amout of weight can make a huge Difference, so Start of Tiny Weight, Just a Dap of Epoxy
You Can get a phone App for sound metering To be More Accurate as Well
REMEMBER CAUTION WHEN TESTING EDFS AS THEY CAN BE VERY DANGEROUS, I DO MY LIVE RUNNING OF EDF FROM ANOTHER ROOM USING MY TX TO TURN THROTTLE
UP AND DOWN SO IF IT FAILS IM NOT WEARING THE FLYING PARTS IN THE SAME ROOM IF EDF FAILS
THERE IS MANY SAFETY VIDEO CLIPS ON TESTING EDFS ON YOUTUBE, I FIND BEING IN ANOTHER ROOM WATCHING THROUGH A WINDOW THE SAFEST, WITH THE EDF FACING AWAY FROM ME.

My new Edf 90mm Changesun the wires came from the right top rather than the left Bottom Hence the exposed  Motor Wires on Top rather than Underneath.
(I could have cut the Edf motor Mount to run the wires The origninal way but did not want to compromise the strength of EDf at Motor Mount) 

   
   
   

Ready for Action Again, Though I'm Thinking of adding an additional  Heat Sink To The Esc.