Kontronik motors

[milly0812]

Are they really worth the extra wedge ?

I've pretty much always used scorpion motors but wonder if the kontronik motors are that much better. I had a brief go with a turnigy heli drive and thought it pretty good for the money too.

ATM I have a scorpion 4035-500kv in my 700 but saw a kontronik 700-52 for sale on here and want to know if it would be that much better considering it's £100 more than I paid for the Scorp ..??

[pgkevet]

No-one here ever mentions hacker motors. Plank dude I respect was a keen advocate and they make heli motors too. Or considerthe heldrive and a bespoke rewind with poss bearing change?

[ChrisB]

I purchased one Kontronik motor for my 700 Xxtreme a pyro 800 48 and to be perfectly honest I am not seeing anything special about it,My Align motors are easily as powerful 750MXs and I rate the Turnigy Helidrive motors as best bang for your buck,I have one in my E700 and its smooth,powerful and efficient,yes it might not last as long but it was a tenth on the price of the Pyro.(£35 from Hobbyking uk)

All motors purchased brand new.if I had to purchase a motor tomorrow out of any brand I care to choose it would be a Helidrive.

[RcRotaryMadness]

They look good quality and i think the newer ones are wound in such a way they can't short out if they burn up? I'm sure they're excellent motors but not sure they're worth the price..

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[milly0812]

Where's Ben ? I know your slightly biased but would still like to hear your view

[electricsceadu]

i ran a hacker in the converted sceadu
the motor was trouble free

[RcRotaryMadness]

When i used to fly planks hackers were my motor of choice but they don't seem to have much preference in the heli field

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[George J]

A Kontronik 700-52 is certainly (imo) a better motor than a Scorp 4035 and as I've just got back from the pub I say Kontronik is better!

[jimmyhorns]

As you know Don, I have had a number of different motors apart.

Performance wise, scorpion wind just about as much copper as they can do onto the stator, but they use multifilament/multistranded windings which reduces the total cross sectional area of the winding per turn compared with a single core (solid) wind.

Kontronic have a fairly conservative amount of copper on their stock motors, but is a single wind. Its (relatively) easy to increase the cross sectional area by 30% and you can pass 50% if you are willing to expend the time, energy and effort.

Like for like they have a similar copper load in each class.

The winding quality on the kontroniks appears much better to the naked eye, and isnt covered in anything to keep it in place/
The scorpion stock model (not ultimate) winding quality is less predictable, and is usually covered (and I mean covered) in insulated resin, which reduces available air and hence cooling to the windings.

The kontroniks have an insulated stator (the laminated iron core), the scorpions dont, and use insulation paper, again reducing the airflow a little.

The kontroniks are more elegantly constructed, and look better made on the inside, but this is purely subjective.

The scorpions get much hotter, and Georges on Rotors gave an explanation for that in terms of them being higher powered, but this doesnt completely stack up in the logs when you compare like for like current drain/flying style.

[Peper]

if you running a Jive, then a pyro is the best match, (so they say)
been using them on my last two machines and getting very good flight times with the 700-52.
they run cooler than the scorpions and contrary to what Mr scorpion man said in the Rotors show, I think heat is wasted energy

[milly0812]

Nice answer James just what I was looking for

[RcRotaryMadness]

Nice answer James just what I was looking for

You mean, just the excuse you were looking for ;-)

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[Jez N]

I think heat is wasted energy

Couldn't agree more.



Have often thought the same thing Don. But then if the machine you have is powerful enough for what you do, then why worry?

We all want the best, but sometimes the expenditure to improvement ratio just doesn't add up.

I suspect that Kontronik motors are just that. A nice luxury if you can afford it, but if you are expecting your heli to be a completely different animal, you may be very disappointed!

BTW, I wouldn't ask Ben as i dont suppose he has used anything other than a Kontronik for sooooo long that he couldn't possibly give you an objective answer!

[jimmyhorns]

Couldn't agree more.



Have often thought the same thing Don. But then if the machine you have is powerful enough for what you do, then why worry?

We all want the best, but sometimes the expenditure to improvement ratio just doesn't add up.

I suspect that Kontronik motors are just that. A nice luxury if you can afford it, but if you are expecting your heli to be a completely different animal, you may be very disappointed!

BTW, I wouldn't ask Ben as i dont suppose he has used anything other than a Kontronik for sooooo long that he couldn't possibly give you an objective answer!

I should probably make it clear though, that how hot they get isnt a measure of their efficiency per-se .

How hot a motor gets is dependent on how efficient it is at turning energy in the form of electrical current into rotational energy of the motor (kinetic energy) making heat as a waste product, and how efficient it is at dispersing that heat.

How efficient the motor is at dispersing the heat will depend on its design, both in terms of an inbuilt fan in the 'can' and in terms of how easily the air can reach the various parts of the motor.

It is quite possible for a less efficient motor to run cooler than a more efficient motor. Im not saying thats the case with kontroniks vs scorpion, but its just demonstrates how using one variable can be misleading.

The earlier scorpions - (think the non HKIII 4035) have pretty terrible 'fan' mechanisms, and not much space for air to flow through them, so its unsurprising they get so hot.

[ady]

Jimmyhorns , have you stripped out a Helidrive turnigy motor ? If yep , how does it compare to the said spoken already motors please ?