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JR-Spektrum . E-flite . Fast Lad Performance

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e-Century Hummingbird - Swift > Which new motor for swift?
 
 
dwb
Heliman
Location: Orsières ch

My Posts This: Topic  Forum		Hello all,
For some still unknown reason my 550+ century motor "pulled" the wires into itself thereby committing suicide after about 5 hours of air time.
In looking for a new motor I came across a scorpion HK4020 1390 kv for about the same price of a replacement century 550+.
Does anyone have information about this or other scorpion motors.
After comparing the specs the hk 4020 seems better?
I note that century specs the 550+ at 14.8 volts max,4 cell lipo,but could not find the max volts on the hk4020, any ideas where to get this spec?
Also scorpion does not give the mounting hole spacing, again anyone know how to find out?
I must say the 550+ seemed to run just fine but I hesitate to buy another as the failure was so unexplainable to me and others who have looked at my dead motor,why would it suck in the wires?
thank you for your time and response if you please.
david

MCX, LAMA V3,SWIFT 16,DX6i,RF G 3.5
09-04-2009 01:30 PM
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Ben-T-Spindle
rrProfessor
Location: Central Illinois

My Posts This: Topic  Forum		I converted to Scorpion last year and they are great. The larger HK4000 (4020, 4025, and 4035) series have larger bearings than the smaller ones and are very durable. They have an 8mm internal shaft and huge bearings. The output shaft is reduced to 5mm to fir standard pinions.

The 1100 Kv may be better for 5s and 6s. For helicopter motors they list maximum RPM instead of voltage. What battery do you have?

The other thing I like about Scorpion is that the motor is designed for easy maintenance. They sell spare parts so you can save and quickly repair it yourself if necessary.

The Stock motor is very good and is usually very durable. Have you contacted Century to see if they will replace it under warranty?




... BTS
09-04-2009 02:17 PM
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MotorRotor
Heliman
Location: Eastern Canada

My Posts This: Topic  Forum		I have two swifts that use the Century 600+ motors. They both have hundreds of flights on them over the last three years and have proven very dependable.

So I would wonder what caused your 550+ to eat itself?? Was it running hot??

I had a similar motor from a Europian manufacturer on my first one that burnet itself in the same way before I replaced it with the 600+. But it would run relatively hot all the time because I had it geared for a relatively high head speed and tried to use 550mm blades with it. Seems the motor was not designed for such loads. That is why I decided to try the less expensive 600+ motors.

They have been great performers for me as I have used them with different gearings on 4S, 5S and now 6S packs.
09-04-2009 11:37 PM
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dwb
Heliman
Location: Orsières ch

My Posts This: Topic  Forum		thanx ben,motor rotor!

Hi,
Ben, my 550+ seemed fine, not hot even in summer.
as the motor is more than 2 years old contacting century is a no go.
I run 2 4900 mah 4 cell rhino zippy cheap lipos that have about 50 flights each and still perform well, and 4 5 cell a123s for 4 min flights, so If i go the scorpion path think I need the hk4020 1390 kv 9 tooth gear.
Do you know the mounting hole spacing and screw size for said motor?
Also how to best lube these motors?

motor rotor,
AS century has a new line of motors, which one would correspond in kv to your 600+?
I like that you can upgrade to 5 or 6 cell by changing gear ratio,
which did you use when running 4 cell?
And how do you lube?

thank you
David

MCX, LAMA V3,SWIFT 16,DX6i,RF G 3.5
09-05-2009 07:53 AM
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e-Century Hummingbird - Swift > Which new motor for swift?
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