RunRyder RC
 5  Topic Subscribe
WATCH
 1 page 1063 views
Scorpion Power Scorpion Power
Helicopter
e-
Elec-Helicopters New or Limited Activity
Zoom › I need recommendations, please!
10-21-2004 07:18 PM  13 years agoPost 1
Want2BRealPilot

rrApprentice

Asheboro,NC

My Posts: All  Forum  Topic

I just got my Shogun off the ground, and I got about 9 minutes flight time,and the motor was pretty hot. I'm using the Himaxx 4200 and Phoenix 25 ESC, along with Kokam 1500ma lipo pack. Will the flight time improve with each charge & discharge? Also I probably need to tweak the ESC & throttle curve setup, to achive cooler motor temp. Any suggestions?
I'm currently using this setup:

7.2 cutoff voltage
Standard current limiting
Brake disabled
Auto calibrating throttle
Standard timing advance
Very soft start
Throttle curve- 0-25-50-85-85 (just a starting point, feel free to make a suggestion)
The guys at Heliproz recommended the Auto calibrating throttle, and very soft start, to avoid gear wear.
Any help, will be appreciated
Thanks, Mike
PS- Go Red Sox !!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2004 07:38 PM  13 years agoPost 2
CRAZYKEV

rrVeteran

Cincinnati,Oh -​U.S.A.

My Posts: All  Forum  Topic

Mike,

Voltage cutoff should be 9.0v
standard current limit Ok
Brake disabled Ok
High gov. mode throttle
Standard timing Ok
Soft start
0-85-85-85-85

8 TOOTH PINION

This will help you get cooler motor temps and longer flight times. I recommend using Like90 pinion which is .5mod instead of incorrect 48 pitch everyone else uses.

Kevin

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2004 08:45 PM  13 years agoPost 3
Want2BRealPilot

rrApprentice

Asheboro,NC

My Posts: All  Forum  Topic

Thanks Kevin, for the info. Will the high gov throttle mode cause premature gear wear? The guys at Heliproz said not to use gov mode, because it would cause the gears to wear. I can't figure why they told me that, because, I noticed that alot of other guys are using gov mode also, according to their posts.
I'm using the Like90 nine tooth pinion, which is what came with the heli-combo. Will the nine tooth pinion cause a higher motor temp?
Mike

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2004 09:46 PM  13 years agoPost 4
CRAZYKEV

rrVeteran

Cincinnati,Oh -​U.S.A.

My Posts: All  Forum  Topic

I started with a 9 tooth pinion and my motor got way hot! I would get an 8 tooth pinion from http://www.like90.com the guys from like90 are great. I have always ran the gov. mode. You have to make sure the gear mesh at the pinion is correct no matter what speed you run. They might be saying that the gears wear faster because they are moving faster in gov. mode, but I would say 90% of us are using gov. mode.

I also think it is easier to fly if you hold a constant head speed.

9 tooth will definatly make the motor run hot. It will drop considerably when you swap to 8 tooth.

Good Luck!

Kevin

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2004 11:47 PM  13 years agoPost 5
Want2BRealPilot

rrApprentice

Asheboro,NC

My Posts: All  Forum  Topic

Thanks again, Kevin, for the help. How do you remove the pinion? Can it be done without a pinion puller? I'm basically just giving the e-heli's a try, and I'm not sure if I'm going to stick with it enough to spring for a puller. BTW, I used the 640 green loctite, to glue the pinion.
Also, what throttle curve do you use for 3D(idle up)? Do you use 85, straight across the curve?
Thanks, Mike

PM  EMAIL  GALLERY  Attn:RR  Quote
10-22-2004 04:21 AM  13 years agoPost 6
iskoos

rrKey Veteran

Orlando, FL

My Posts: All  Forum  Topic

You need to heat the pinion gear and pull it to remove it safely. A soldering iron will do that. It would be nice if you had pinion puller but I was told that once you get them hot enough, they will come out.
You cannot say 85%, 75%, or 55% for your optimum throttle curve. This varies on your settings, your ESC, your radio. You will need to figure it out on your own. You will either fly the heli with different throttle curves or tach the blades. What people who use governor mode recommend is that you should figure out your max head speed at zero pitch and run the governor mode at about 200-300 below that max head speed. This will allow your system to have some extra power to make up lost head speed when you give collective input.

Go see this thread I posted couple days ago. You will find good info provided by WreckRman2. You can pretty much set your governor per what you can find there.

I don't use auto calibrating mode. I used "fixed" mode and it was working fine but you need to set up your throttle curve. With governor mode it is easier once you know.

I am however not sure about cut-off voltage should be set to 9.0v
I will start a thread about this issue. I do believe that we can go below 9.0v safely for 3-cell pack but definitely not 7.2v like you set. That's way too low. I am thinking that 8.1-8.4v should be acceptable but not sure yet I will seek opinion on that.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-22-2004 04:28 AM  13 years agoPost 7
Jim Cimino

rrKey Veteran

NE Pennsylvania

My Posts: All  Forum  Topic

Most LiPo manufacturer's do not recommend going below 3.0Volts per cell...9.0 volts for a 3 cell pack. These don't fly well below 10 volts anyway.
Jim

PM  EMAIL  GALLERY  Attn:RR  Quote
10-22-2004 05:45 AM  13 years agoPost 8
Modefo's Heli's

rrApprentice

Littlerock CA

My Posts: All  Forum  Topic

Sparrow is using mod 5 now also

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
10-22-2004 06:10 PM  13 years agoPost 9
Want2BRealPilot

rrApprentice

Asheboro,NC

My Posts: All  Forum  Topic

Thanks iskoos, for the link. The explanation of gov setup, provided by Wreckman, will be most helpful.
Mike

PM  EMAIL  GALLERY  Attn:RR  Quote
11-07-2004 11:58 AM  13 years agoPost 10
YBLee

rrNovice

Assonet, MA

My Posts: All  Forum  Topic

Pinion Attachment follow-up question

I just purchased the 2025-4200 and an 8-T pinion. The pinion will only slide on the motor shaft in one direction. It appears one end of the pinion ID is smaller than the other - is this normal? When I slide the pinion on the shaft it stop just as the end of the shaft comes to the end of the pinion. Should I continue to apply pressure to "press-fit the pinion onto the shaft or just us Loctite to secure the pinion to the shaft?
Thx for the help, Lee

Lee, Assonet, MA

PM  EMAIL  GALLERY  Attn:RR  Quote
11-07-2004 03:22 PM  13 years agoPost 11
copperclad

rrElite Veteran

NY

My Posts: All  Forum  Topic

hi
sounds like a small burr is at one end of the pinion keeping it from sliding on , press it into the right position AND use red loctite ,

PM  EMAIL  GALLERY  Attn:RR  Quote
11-07-2004 06:17 PM  13 years agoPost 12
YBLee

rrNovice

Assonet, MA

My Posts: All  Forum  Topic

Pinion Attachment follow-up question

Thx for the feedback copperclad. I wasn't sure if the pinion was made that way on purpose to prevent the pinion from being fitted to the shaft incorrectly.

Can you tell me what the difference is between the Red and Green Loctite? I've seen both recommended here.

Thx again for the info,
Lee

Lee, Assonet, MA

PM  EMAIL  GALLERY  Attn:RR  Quote
11-07-2004 06:35 PM  13 years agoPost 13
Hoverup

rrElite Veteran

Golden Gulf Coast -​USA

My Posts: All  Forum  Topic

If you go to the Loctite website, you will find that they recommend the green formula 680 for close fitting machined surfaces like a pinion on a shaft. The red formulas are generally used for extreme high temperature environments. This is a generalization as there are numerous formulae for various applications, but the green formula 680 is generally the most popular amoung E-flyers for pinions.

Cheers - Boyd
AMA 80393
IRCHA 3355
LSF 853
Major USAF
Retired

PM  EMAIL  GALLERY  Attn:RR  Quote
11-07-2004 07:18 PM  13 years agoPost 14
YBLee

rrNovice

Assonet, MA

My Posts: All  Forum  Topic

Thx Boyd. I will check out the site - good idea! Have a great day. Lee

Lee, Assonet, MA

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1063 views
Scorpion Power Scorpion Power
Helicopter
e-
Elec-Helicopters New or Limited Activity
Zoom › I need recommendations, please!
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Friday, November 17 - 10:57 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online