RunRyder RC
 4  Topic Subscribe
WATCH
 1 page 1026 views POST REPLY
Helicopter
e-
Scorpion Electric Components
› Anybody else feel that scorpion Kv's are ?
02-04-2012 01:38 PM  6 years agoPost 1
rapidity

rrVeteran

ohio

My Posts: All  Forum  Topic

Edited, as poster (me) didn't know what he (me) was doing.

Anyone wanting to know more about the jives mode 11, read on.

PM  EMAIL  GALLERY  Attn:RR  Quote
02-04-2012 03:01 PM  6 years agoPost 2
Ejeremy

rrKey Veteran

Bourbonnais,IL

My Posts: All  Forum  Topic

I believe you wanna be in the 70% range for best efficiency. This is how I figure my head speed.

Rave env 13t pinion/ 130t main gear = 1/10
My kv is 520 and efficiency 89%
12s lowest voltage just say 44v

520x44=22880 rpm on motor but it's 89% efficiency

22880x.89=20363 rpm

20363/10= 2036 on the head this is a 89% efficiency if you went with 100% you would get 2288 at 44v

Now we all know a fully charged pack is 50.4v so when you do your tach there's a lot of things to consider. How charged your batteries are (new or old) the efficiency % of your motor and gear ratio.

I hope this helps Jeremy

Team Futaba
Team Thunder Tiger
Team Radix
VP Powermaster Fuels

PM  EMAIL  GALLERY  Attn:RR  Quote
02-04-2012 10:38 PM  6 years agoPost 3
rapidity

rrVeteran

ohio

My Posts: All  Forum  Topic

Tached at 3-4 minutes into the run. Even if the batts were holding 3.9v, expected headspeed would still be less then what I got.

If your just primarily interested in one headspeed, its not that big a deal. When your trying to set a range of headspeeds then it becomes more of a problem, ie. hover, max.

PM  EMAIL  GALLERY  Attn:RR  Quote
02-05-2012 06:55 AM  6 years agoPost 4
MrMel

rrProfessor

Gotland

My Posts: All  Forum  Topic

Scorpion is usually VERY close to its stated kv,
What mode do you use in the Jive?

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

PM  EMAIL  GALLERY  Attn:RR  Quote
02-05-2012 01:41 PM  6 years agoPost 5
rapidity

rrVeteran

ohio

My Posts: All  Forum  Topic

mode 11

PM  EMAIL  GALLERY  Attn:RR  Quote
02-05-2012 01:43 PM  6 years agoPost 6
MrMel

rrProfessor

Gotland

My Posts: All  Forum  Topic

Mode 11 is rpm storage mode, did you reset the jive and did you spoolup the first time as described in manual? With fully charged packs with zero pitch to teach it?

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

PM  EMAIL  GALLERY  Attn:RR  Quote
02-05-2012 01:54 PM  6 years agoPost 7
rapidity

rrVeteran

ohio

My Posts: All  Forum  Topic

I don't quite understand that part of the manual.

What I did was set initial throttle curves to 25% for hover mode which is also set on a knob switch. Had to lower the curve 3% to get the hover rpm I wanted.

Then switched to an idle up with 80% curve and tached the high end which gave me the 2150.

Fresh pack, took me 3-4 minutes to set hover, after that I switched to my idle up.

PM  EMAIL  GALLERY  Attn:RR  Quote
02-05-2012 01:56 PM  6 years agoPost 8
rapidity

rrVeteran

ohio

My Posts: All  Forum  Topic

dumb question deleted

PM  EMAIL  GALLERY  Attn:RR  Quote
02-05-2012 02:04 PM  6 years agoPost 9
MrMel

rrProfessor

Gotland

My Posts: All  Forum  Topic

Mode 11 is different it learns stuff on first spoolup.
Reset (mode 1 then 11) then spoolup on ground with zero pitch and let stabilize

Do not hover
Do spoolup using 80% or so, not 25.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

PM  EMAIL  GALLERY  Attn:RR  Quote
02-05-2012 02:12 PM  6 years agoPost 10
rapidity

rrVeteran

ohio

My Posts: All  Forum  Topic

I'll give that a try once we get some decent weather. Wish u would do a video through the actual setting of the rpm.
Thanks for the help.

PM  EMAIL  GALLERY  Attn:RR  Quote
02-05-2012 02:14 PM  6 years agoPost 11
MrMel

rrProfessor

Gotland

My Posts: All  Forum  Topic

Or just swap to Mode 4 and you will need to do any of this (then it determine best RPM each spoolup)

I'm pretty sure you will find that Scorpion KV is spot on.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

PM  EMAIL  GALLERY  Attn:RR  Quote
02-05-2012 09:24 PM  6 years agoPost 12
rapidity

rrVeteran

ohio

My Posts: All  Forum  Topic

I'm using 11 because the helis for f3c type flying and I want the same rpm for hovering each flight.

Am I understanding this right.....

Put the throttle on slider, with linear throttle curve.
Reset jive mode 1, mode 11
Pitch to 0, start raising slider until reach rpm I want.
Hit throttle hold, power down.
Note throttle %.
Reset a straight line curve to that %.

Say I got 1950 @ 80%. It stores this value in jive. Then any other throttle curves I set, for example hover curve, will be based off this value initially stored in the jive?

I can go into a hover flight condition, set a 25% curve or whatever that gives me 1550.

Then I will always get 1950 @ 80% and 1550 @ 25%, starting with my weakest battery.

Am I in the ball park?

PM  EMAIL  GALLERY  Attn:RR  Quote
02-05-2012 09:39 PM  6 years agoPost 13
MrMel

rrProfessor

Gotland

My Posts: All  Forum  Topic

Except, first spoolup, do NOT try to get the headspeed you want, dont fiddle with it, spoolup to 80% wait until settle and spool down, then you can start playing with it..

Thats what you did wrong before i suspect.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

PM  EMAIL  GALLERY  Attn:RR  Quote
02-06-2012 11:31 AM  6 years agoPost 14
Taipan

rrElite Veteran

Sydney, Australia

My Posts: All  Forum  Topic

Did you set your endpoints to say 83/83 if using Spektrum? As that eliminates the buffer that'll give you inaccurate throttle curves.

PM  EMAIL  GALLERY  Attn:RR  Quote
02-06-2012 12:15 PM  6 years agoPost 15
rapidity

rrVeteran

ohio

My Posts: All  Forum  Topic

That was easy. Got 2015 @ 80% which is perfect.

My apologies to Scorpion. Would never have come up with that on my own.

Thanks again.

{Taipan, yes my endpoints were set as u described. Thks}

PM  EMAIL  GALLERY  Attn:RR  Quote
02-06-2012 01:22 PM  6 years agoPost 16
Ejeremy

rrKey Veteran

Bourbonnais,IL

My Posts: All  Forum  Topic

Glad you got it figured out!

Jeremy

Team Futaba
Team Thunder Tiger
Team Radix
VP Powermaster Fuels

PM  EMAIL  GALLERY  Attn:RR  Quote
02-06-2012 02:03 PM  6 years agoPost 17
3Dmuse

rrApprentice

Ontario, Canada

My Posts: All  Forum  Topic

@rapidity

You should have not edited your initial post. Now when someone reads this thread it will not be clear what you were doing wrong. The value of these threads is exactly that they allow others to figure out what they are doing wrong.

PM  EMAIL  Attn:RR  Quote
02-06-2012 02:09 PM  6 years agoPost 18
rapidity

rrVeteran

ohio

My Posts: All  Forum  Topic

The reason I edited it was because it had nothing to do with the problem. I just wasn't calibrating the jive correctly for mode 11.

PM  EMAIL  GALLERY  Attn:RR  Quote
02-06-2012 02:34 PM  6 years agoPost 19
3Dmuse

rrApprentice

Ontario, Canada

My Posts: All  Forum  Topic

The reason I edited it was because it had nothing to do with the problem. I just wasn't calibrating the jive correctly for mode 11.
Isn't this exactly the problem you were having? Unexpected head speeds because of incorrect calibration of the ESC? Leaving these kind of mistakes documented might help someone someday.

PM  EMAIL  Attn:RR  Quote
02-07-2012 02:30 PM  6 years agoPost 20
Richardmid1

rrProfessor

Leeds, England

My Posts: All  Forum  Topic

You should also be careful with mode 11, if you accidently put in a partially charged pack one day you won't realise because the ESC will still try to give you the same HS and it will be too late!

60% of the time, it works every time!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
WATCH
 1 page 1026 views POST REPLY
Helicopter
e-
Scorpion Electric Components
› Anybody else feel that scorpion Kv's are ?
 Print TOPIC  Make Suggestion 

 4  Topic Subscribe

Tuesday, May 22 - 8:46 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online