RunRyder RC
WATCH
 1 page 660 views POST REPLY
HomeRC & PowerAircraftHelicopter
e-
Electric Motors-Controllers-ESC
Motor › 4S motor scorpion HKII-2221-8
11-14-2016 02:38 AM  24 months agoPost 1
R38133

rrKey Veteran

USA

My Posts: All  Forum  Topic

Scorpion HKII-there web site says 3S max its the correct KV would I smoke it??

PM  EMAIL  GALLERY  Attn:RR  Quote
11-14-2016 05:23 PM  24 months agoPost 2
Heli Fanatix

rrVeteran

Fountain Valley, CA

My Posts: All  Forum  Topic

Typically when you go up in voltage, will not harm the motor since the wire rating is more than most power systems available.

What do you want to do is keep the operating rpm within the manufacture's recommendation

For example: If your target head speed 3500
- you want to be at about 3000 to 4000

For your situation
- I'm assuming you want to go 4S
- depending on your ESC, yes you can

- may I suggest a YEP 40A
- it's more effort but will have more Headspeed ranges
- set to GOV Store
- learning voltage to 3.9v
- you have a useable throttle curve from 55% to 90%
- awesome Internal GOV
- solid tail performance

PM  EMAIL  GALLERY  Attn:RR  Quote
11-15-2016 05:59 AM  24 months agoPost 3
pctomlin

rrVeteran

Texas

My Posts: All  Forum  Topic

You should not smoke the motor on 4S however you may blow it up. At fully charged 4S voltage the motor will be turning a little over 60K RPMs and ~53K RPMs at 3.71V per cell. Keeping bearings in the motor could be a problem.

PM  EMAIL  GALLERY  Attn:RR  Quote
11-15-2016 07:13 PM  24 months agoPost 4
Heli Fanatix

rrVeteran

Fountain Valley, CA

My Posts: All  Forum  Topic

This is your Head Speed based on a YEP 40A
- Trex 450
- 150T Main Gear
- 12T Pinion
- Scorpion 2221-8 (3595kv)
- 4S
- 35C
- Learning Voltage 3.9V on GOV Store

Throttle 60%: 3213
Throttle 65%: 3313
Throttle 70%: 3414
Throttle 75%: 3514
Throttle 80%: 3614
Throttle 85%: 3715
Throttle 90%: 3815
Throttle 95%: 3915

- use Flat Throttle Curves
- take in mind these are for YGE, Kontronik
- not the same for Castle or External GOV

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 660 views POST REPLY
HomeRC & PowerAircraftHelicopter
e-
Electric Motors-Controllers-ESC
Motor › 4S motor scorpion HKII-2221-8
 Print TOPIC  Make Suggestion 

 1  Topic Subscribe

Tuesday, November 13 - 3:00 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online