rrTV-PHOTO   New HD TV
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 458 ONLINE 29 EVENTS SEARCH REGISTER  START HERE
 
1 page1589 viewsPOST REPLY
Next D . Fast Lad Performance . Ace Hobby

.
.
e-Electric Conversions > AXI for 50 - 90 size ?
 
 
I3DM
rrProfessor
Location: Israel

Hello guys.
im looking into converting an Evo 50 or Freya 90 to electric, and wondering if you could tell me which AXI motor might fit into those ? obvioiusly this will involve making my own engine mounts and such, but i have a friend with a CNC shop, so i might be able to do this.

anyway, im asking about AXI since they have a good local dealer, and i can get them locally with warrenty and everything.

thanks for answering.

Team pilot for Radix, Helidirect, Logictech, ThunderPower, Fromeco, Gaui
www.liorzahavi.com
08-24-2004 Over year old.
HOMEPAGE  
 
 
parabellum
Heliman
Location:

big AXI motors have very low kv

like 300 rpv

so you will need a big pinion.

and they have 2" diameter, and make them hard to fit to existing frame.


you only have 4 choice.

4130-20
4130-16
4120-18
4120-14
08-25-2004 Over year old.
 
 
brancoli
Heliman
Location: China

I3DM

I suggest you to change your motor choice.

If you use low series cell count, you need to use larger pinion to achieve required head speed.
AXI will be quite hot if you use a smaller gear ratio.

If you are playing HV and use smaller pinion, you may encounter a rpm limitation on motor due to the PWM rate of Esc.

These problems persist even if you choose the lowest Kv AXI.

I have tried an AXI 4120 conversion of shuttle plus.
Flyable but motor is quite hot.

Now, I am converting it to Actro!

Cheers
08-25-2004 Over year old.
 
 
I3DM
rrProfessor
Location: Israel

brancoli, i dont see why a low KV motor with the right gear wont work, especially the AXI, which has a ton of torque !

if i do this, i will probably have to make my own motor mount \ pinion gear anyway, so i should be able to match the engine's working RPM to the rotor head RPM that i need with the right gear, no ?

thanks.

Team pilot for Radix, Helidirect, Logictech, ThunderPower, Fromeco, Gaui
www.liorzahavi.com
08-25-2004 Over year old.
HOMEPAGE  
 
 
I3DM
rrProfessor
Location: Israel

Hey Albig,
accoring to Model Motors:
08-25-2004 Over year old.
HOMEPAGE  
 
 
brancoli
Heliman
Location: China

I3DM
I don't see the motor doesn't work.
But, I find it is running quite hot, meaning the motor is not so comfortable doing the job. And, I also heard of throwing magnet in some case.
Anyway, update status please...
08-25-2004 Over year old.
 
 
I3DM
rrProfessor
Location: Israel

Have you heard of an AXI throwing magnets? i saw that in the AXIs each magnet sits in a designated machined pocket, how can it throw magnets out ??

anyway, i talked to my local AXI dealer, and we will try to see what motor might fit. im still not sure about Al's suggestion, as the voltage seems too high !

Team pilot for Radix, Helidirect, Logictech, ThunderPower, Fromeco, Gaui
www.liorzahavi.com
08-25-2004 Over year old.
HOMEPAGE  
 
 
I3DM
rrProfessor
Location: Israel

No kidding ? that sounds awsome and might be just what im looking for in a 50 size conversion !!

please tell me:
1. what gear did you use ? is it stock ?
2. how did you make the conversion ? any pics ?
3. what do you mean "a light setup" ?
4. do you fly 3D with it ? whats the flight time \ power ?

thanks Al !!

Team pilot for Radix, Helidirect, Logictech, ThunderPower, Fromeco, Gaui
www.liorzahavi.com
08-26-2004 Over year old.
HOMEPAGE  
 
 
QCM
Heliman
Location: Scotland

I have tried an experiment and took a bog standard raptor 30, plugged in an actro 24/4 using the supplied 9t pinion and 86t main gear, and ran it with 2 x 4s3p cells.

It can give a head speed of 1650 and only pulls 15 amps, tends to nodd a bit as well! The controller and battery are rated up to 70 amps, so lots more to play with. This motor provides 570 revs per volt, so I guess it needs a lower gear ratio to more effective.

Does anyone know of different pinions and main gears, or maybe I would have to put another gear box in?
09-25-2004 Over year old.
HOMEPAGE  
 
 
I3DM
rrProfessor
Location: Israel

That sounds interesting. maybe you should just machine your own pinion gear rather then a gear box... ?

Team pilot for Radix, Helidirect, Logictech, ThunderPower, Fromeco, Gaui
www.liorzahavi.com
09-25-2004 Over year old.
HOMEPAGE  
 
 
gpyros
Key Veteran
Location: Palm Desert, California

What controller were you using for the 24-4?

The Actronic controllers artificially limit the headspeed, the Schulze allows it to run where it is much happier.

Greg

Maxi-Joker helicam
Joker-CX helicam
Graupner Jet Ranger (elec)
Raptor-50
Logo-10
9CH
09-25-2004 Over year old.
HOMEPAGE  
 
 
ScotY
Senior Heliman
Location: Honolulu, HI

Swapping out your gearing for the 50 gearing (85T main gear and 10T pinion) should give you a couple hundred more rpm...probably enough to do the job.
09-25-2004 Over year old.
 
 
QCM
Heliman
Location: Scotland

Yes I thought of the 10t/85t option and have just installed it...just waiting on a dry day to test it out

The ESC is a Jeti opto 77 amp. Doesn't have a governor unfortunately.
09-28-2004 Over year old.
HOMEPAGE  
 
 
QCM
Heliman
Location: Scotland

That worked, not bad! However I think an upgrade to 50 size is in order.
09-29-2004 Over year old.
HOMEPAGE  
 
 
QCM
Heliman
Location: Scotland

Having played with the 30 sized version a bit more, I now just set the motor rpm to 100% and away it goes, drawing amps as required.

Seems great, heaps of power available and was very simple to do!
10-04-2004 Over year old.
HOMEPAGE  
 
 
I3DM
rrProfessor
Location: Israel

back to the original question - what about AXI ??

Team pilot for Radix, Helidirect, Logictech, ThunderPower, Fromeco, Gaui
www.liorzahavi.com
10-04-2004 Over year old.
HOMEPAGE  
 
 
QCM
Heliman
Location: Scotland

I3DM, I too am a fan of AXI's, but there just wasn't anything suitable, which is why I chose the actro. I use AXI's in all my other fixed wing models, they just don't have the performance of the actro for the helis though.
10-04-2004 Over year old.
HOMEPAGE  
 
 
I3DM
rrProfessor
Location: Israel

Im not just a fan, the AXIs are the only motors that have a serious dealer in my country, i almost have to use them if i want the option of normal service...
there has to be a way with gear ratio \ voltages to do this, those outrunners have awesome torque, im just not so sure how to use it for heli application.

Team pilot for Radix, Helidirect, Logictech, ThunderPower, Fromeco, Gaui
www.liorzahavi.com
10-04-2004 Over year old.
HOMEPAGE  
 
 
chuckhager
Key Veteran
Location: Clovis, CA

I was just reading some posts on the rcgroups website and Albig was discovering some problems he is having with the AXI motors. Here is the link http://www.rcgroups.com/forums/showthread.php?t=282363

Al's comment starts at the 3rd post in the thread. Just thought this information might be of some help.
10-05-2004 Over year old.
HOMEPAGE  
 
 
1 page1589 viewsPOST REPLY
Esprit Model . Thunder Power RC . Real Raptors

.
.
e-Electric Conversions > AXI for 50 - 90 size ?
  UPDATE SCREEN   PRINT TOPIC Advertisers 

Subscribe to This Topic

Saturday, October 11 - 1:49 pm - Copyright © 2000 - 2008 runryder.com | email | link to rr | runryder needs cookie