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Discussion Starter · #1 ·
I've got a Hokusei Primus 90 Pro that I want to power with an Electric set-up. I could use some help picking out a motor/etc.

The Scorpion guy suggested this. 150 watts per pound
Scorpion SII-4025-440 Brushless Motor, Kv=440
100 amp ESC
APC 14x12 , 15x10 prop.

Here are the specs.

Length: 1780mm include spinner
Wing span: 1790mm
Flying weight: 3600g-3700g
Wing area: 64.08 dm2

Recommended:

Engine: 4C 90-110 scale YS FZ91, FZ110S, SAITO FA-125
Propeller: 4C 90 APC 15x6 4C 110 APC 16x6
Radio Requirement: 6CH, 5 SERVOs, 1ESC
 

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Discussion Starter · #3 ·
Yea, 6 but the motor specs say it can handle 7....

There's no tube in the fuse and apparently it lacks sheer webbing on the wing spar as pointed out in another thread so it's weak.
 

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Discussion Starter · #5 ·
The wing is one piece and drops down into the fuselage in a tongue and groove kinda way and the canopy section goes on and locks it all together. There's no wing tube.
I'm thinking that overpowering it will just end badly......


I found this vid of the Beast 60e using the same motor. The specs say it weighs more than the Primus.
 

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What would a Primos run?
 

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Discussion Starter · #7 ·
I've got a Hokusei Primus 90 Pro that I want to power with an Electric set-up. I could use some help picking out a motor/etc.

The Scorpion guy suggested this. 150 watts per pound
Scorpion SII-4025-440 Brushless Motor, Kv=440
100 amp ESC
APC 14x12 , 15x10 prop.

Here are the specs.

Length: 1780mm include spinner
Wing span: 1790mm
Flying weight: 3600g-3700g
Wing area: 64.08 dm2

Recommended:

Engine: 4C 90-110 scale YS FZ91, FZ110S, SAITO FA-125
Propeller: 4C 90 APC 15x6 4C 110 APC 16x6
Radio Requirement: 6CH, 5 SERVOs, 1ESC
I never built it, it's still in my closet, local pickup in Cocoa Florida, make me an offer...
 

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I'm close but not close enough. Ocala now, getting ready to drop someone at Sanford Airport Orlando.
 

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Discussion Starter · #9 ·
I've got a Wild Fred built Lamyak 30cc as well, (Gen II Wrong way)....I no longer have a vehicle
large enough to transport them.
 
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