Scorpion HK-4525-520KV LTD

[jointer]

I allready seen that, great record.
So Edward, you will have even more power then in this video, with the 4535. :)

[Edvard R]

So Edward, you will have even more power then in this video, with the 4535. :)

Should be enough, eh?

[aussiemick]

Should be enough, eh?

Until every one goes 14 or 15S that is :)

Mick

[Edvard R]

Oh... Accidentally acquired the world record motor too... should make for a good giggle and some dropped jaws at the field... :thumbup:

http://www.helifreak.com/attachment.php?attachmentid=191143&stc=1&d=1290342567

[Georges van Gansen]

ha ha.... looks like you are going to have a great time doing FFF. :thumbup::banana:banana:banana

[Edvard R]

ha ha.... looks like you are going to have a great time doing FFF. :thumbup::banana:banana:banana

Georges - you know I will ;)

[helicraze]

Does the CB still fit in with this motor?

Do you need to remove material on the bearing block to stop it rubbing?

Also does the fan run off the jive BEC? Any issues?

What is different with the shape helicopters gear? The TDR is very cleaver as all gears are well supported the mikado mod 1 can bend etc.

[aussiemick]

Does the CB still fit in with this motor?

Do you need to remove material on the bearing block to stop it rubbing?

Also does the fan run off the jive BEC? Any issues?

What is different with the shape helicopters gear? The TDR is very cleaver as all gears are well supported the mikado mod 1 can bend etc.

Counter Bearing still fits on the 4525.

I haven't had to remove any material from the bearing block, I am only getting some rubbing from the frame sides.

Jive seems to have no problems running the fan off the slave output of the BEC.

The Shapes gears are herring bone cut, quite hard to produce in CNC, not so hard with a cast moulded gear. The advantage of a herringbone gear is that there is no thrust trying to push the gear down (or pull up depending on the angle cut into the gears).

MIck

[helicraze]

Thanks, are you coming to hirobo cup this weekend?

[aussiemick]

Nope, that is a bit far to drive for a weekend, Coffs Harbour is about as far as I am going to drive for a weekend jaunt. If it was on for a whole week then that would change things. :)

Mick

[helicraze]

How can i obtain QTY2 of these special motor mounts? Can anyone help me please.

Also with these scorpions and heat i assume its back to oiling every 5 flights?

[helicraze]

So when do the new motors arrive?

[aussiemick]

Also with these scorpions and heat i assume its back to oiling every 5 flights?

I have never had a Scorpion before, this oiling business is a bit over the top. I reckon I will swap the bearings out for a set of sealed for life high speed ceramic hybrids.

Mick

[helicraze]

I did play around a lot with scorpions in the past, in conclusion i found:

Oliling was needed every 5 flights
Counterbearing prolonged lower bearing life but a lot (double)
Ceramics and no oiling was a waste of money

Only reason they needed oiling was i suspect not as well balanced as pyro motors but mainly due to heat. The grease cannot handle the heat.

I guess thats the price we pay for power.

Wonder if the 4525 bearings are any bigger than the 4035 series? I think so as its 10MM shaft correct?

So if I dump my 4500MAH pack in 5 minutes on the pyro (uber hard) does that mean i should set my timer to 3 minutes?

Just drilled out the pinion, fairly soft it was.

[aussiemick]

I am pretty sure the bearings in the 4525 are 10x19x5mm.

If you are going to spin the head up to full noise with the scorpion then I would set it to 3 minutes Maximum.

I reckon you will find the heli has more than enough oomph spinning up at 1600 RPM, and you will get lots longer flight time out of it.

Amazingly a Pyro's bearing don't need to be oiled and they last a long time too, the scorpion isn't that much hotter than a pyro that has been given a thrashing.
Oiling the bottom bearing on the TDR will be almost impossible, especially with the counter bearing installed.

Mick

[helicraze]

Hmmm same size as logo main shaft bearings.

Thanks 3 minutes it is.

1850 its all i fly at LOL

Good point about the oiling, i guess i'll make some observations while flying and see how i go.

[jointer]

Mine is shipped, so i will probably try it as it is, but check the bearings after 10 flights and probably replace with ceramics.
Remember, my Pyro bearings were gone at 100th flight, but Japan steel bearings are now fine, i checked around 200 flight.
Anyway motor bearings spins fastest in the heli, so no wonder they wear out.

[OICU812]

Kyles latest vid with this very motor in discussion.

dkrKa1UNbTQ&feature=player_embedded#!

[helicraze]

Here we are:

Here we are, bit of mucking around, cut the shaft, remove circlip, flat spot was already done and correct spot,, check set screws and loctite, push down on motor and pinion then tighten, solder connectors.

Just need to reprog jive and tach it etc.

[helicraze]

Did you guys increase pitch etc? Hope to test fly tommorow.

[aussiemick]

Did you guys increase pitch etc? Hope to test fly tommorow.

I did a bit, went to 14.75' in IU1 and IU3 (speed mode)
For most of my flying I am in IU1 (1600HS)

Mick

[speedy610]

Hi Mick,

will get one of this Motor as well. What's your flying time at 1600? Compared to a Pyro with the same flying stile, is there a big drop in flying time? Just wondering and can't wait to get it :)

Hans

[aussiemick]

I am at 4 minutes, down from 5:30.
But I tend to use a lower headspeed for more of the flight since installing this motor.

I allow myself about 1 minute with it at full noise after about 1 minute of flying to allow the main gear to expand to operating size.

I reckon it would chew up a 4000 battery in less than 3 minutes if you fly it at full noise for the full flight.

Mick

[Edvard R]

I reckon it would chew up a 4000 battery in less than 3 minutes if you fly it at full noise for the full flight.


It will. At 100% throttle, it is basically drinking big gulps out of the battery - because it can.
My on-the-way-hopefully-to-arrive-before-the-weekend 4530 will use 5000 mAh in 90 seconds if you let it (and the heli can handle it)...

[speedy610]

Thanks Mick! Can't wait for my LE Motor! But anyway, the weather is realy bad here in switzerland and were expecting snow tonight.... time to build a Lipo Heater to keep them at a warm temperature :)

Hans