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ProModeler Scorpion Power
THX1138

Elite Veteran

Camp Bondsteel, Kosovo

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I am wanting to get into F3C competition flying as it is a long time goal of mine.

One of the airframes I am considering is the Urukay Competition. I plan on taking the avionics out of my Rave Ballistic and installing them in the Urukay.

The motor I am currently using is the Scorpion 520 Ultimate. How is this motor for comp flying? It has performed flawless for 3D but should I look at a different motor as far as efficiency or flight times are concerned? If so what motors are recommended?

I also plan to use the V-bar. I have the Mikado edition YGE 160 and the GOV is amazing when the two are combined.

As far as the V-bar goes, is anyone using this FBL system with the 3 blade head? Would I need to change any settings to have the machine fly properly or is it a "normal" V-bar set up?

For F3C flying, what is the advantage of the 3 blade head over the 2 blade head?

Thanks in advance!

Lou

Just give me five dudes and two flashbangs...

07-22-2016 06:51 PM
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DHiatt

Senior Heliman

Huntsville, AL - USA

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Good Choice

Lou,

You won't be disappointed in choosing a Urukay Competition! There's a good dialogue going with multiple owners under my thread in the F3C/F3N Competion section. Under the same title in this section too. You may have already seen them.

Your current motor will definitely get you under way, but might find a lower KV motor will be a better fit for this machine and 3-blade. Given the motor pulley options available you may find more efficiency and smoother power delivery with low tooth count. I found good target head speed ranges to be 1100-1200 in hover and around 1800 for aerobatics.

I really like the OS Motor 490kv unit. It is very efficient with low amp draw. I used it with good success when testing the 3-blade setup. But there are many, many motors to choose from these days!

D

07-23-2016 05:44 AM
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THX1138

Elite Veteran

Camp Bondsteel, Kosovo

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Thank you for your input brother! I'll look into those other threads.

As far as the OS motor, according to the manufacture specs show the motor shaft only being 30mm. Does this engage well with the motor mount? What pinion are you using with the OS 490?

What FBL unit are you using?

I've downloaded the manual and read through it s couple times. Just curious as to what I'm getting into, I like to do as much research as I can when I'm looking into a new project.

Thanks again.

Lou

Just give me five dudes and two flashbangs...

07-23-2016 06:54 AM
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DHiatt

Senior Heliman

Huntsville, AL - USA

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OS Motor Shaft

Lou,

Yes, I forgot about that. The stock motor shaft is too short to engage the motor mount bearing. In Japan, the domestic market models using OS Motors do not have counter bearing supports (JR Forza, Sylphide, Quest Impaction). With belt drive, if the tension is correct, they believe bearing supports are not necessary.

It's possible that OS offers a longer shaft for the OMH series motors. I will inquire.

I am using CGY750s with v2.0 firmware.

D

07-25-2016 08:04 PM
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THX1138

Elite Veteran

Camp Bondsteel, Kosovo

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Thank you, I look forward to hearing what you come up with.

Lou

Just give me five dudes and two flashbangs...

07-27-2016 06:20 AM
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DHiatt

Senior Heliman

Huntsville, AL - USA

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OS OMH Motor Shaft Update

Lou,

OS has informed us, they do not offer longer shaft versions of their OMH motor series.

D

07-27-2016 10:28 PM
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THX1138

Elite Veteran

Camp Bondsteel, Kosovo

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So are you not using the lower bearing support or do you have a work around for this?

Lou

Just give me five dudes and two flashbangs...

07-27-2016 10:53 PM
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DHiatt

Senior Heliman

Huntsville, AL - USA

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"So are you not using the lower bearing support or do you have a work around for this?"

Both actually. I have some custom long shafts, but have also run without the bearing support. If your belt tension is appropriate, I don't think the support is really needed for F3C. The OS main bearing and shaft diameter are oversized.

D

07-28-2016 08:16 PM
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THX1138

Elite Veteran

Camp Bondsteel, Kosovo

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Noted. Thank you!

Lou

Just give me five dudes and two flashbangs...

07-28-2016 09:03 PM
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TomasLundberg

Senior Heliman

PiteƄ, Sweden

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The OS OMH 5825-520 has slightly longer shaft (40mm) and should be long enough to use with counterbearing in the Urukay

11-07-2016 09:35 AM
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THX1138

Elite Veteran

Camp Bondsteel, Kosovo

My Posts: All  Forum  Topic

The 520 does have a longer shaft but it also has very different power consumption and efficiency ratings than the 490. I purchased a 490 and I am exploring options for having a custom shaft made...

Lou

Just give me five dudes and two flashbangs...

11-07-2016 01:41 PM
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TomasLundberg

Senior Heliman

PiteƄ, Sweden

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If it's not a prototype it seems like Mr Iso used the OMH 5825-520 motor at the Japan F3C Championships

11-28-2016 07:42 PM
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