What do the numbers mean

[Mike Morcher]

HELP

Yes this is new to me so what do the numbers on the

Side of electric motors mean?

> >

Mike>>

[Richard Wood]

They can refer to the diameter and length of the outer case

(the part of an outrunner that rotates ) or the stator (the inner static part

with the windings).

e.g the Tornado motor in my Magnatilla is a 4260-600, meaning a

outer case of 42mm diameter & 60mm length with a kv of 600.

The numbers on other motors may refer to the inner stator size or just

some nominal figure....

Have a read through the handy info in the electric section of the forum for

much more on motors,controllers & batteries.

It all gets much clearer as you get going.

 

Edited By Richard Wood on 09/12/2010 15:25:12

[David Ashby - Moderator]

E-flite number their motors loosely equivalent to an i.c. counterpart, hence the Power 25, 46, 60, 90 etc. although they also provide good performance data with each motor too.  

[Ernie]

Oh Richard, don't ask, it's one of the nightmares of our hobby

 

ernie

[Mike Morcher]

Thanks Guys

 

So they are not a lot of help then 

 

Makes it harder to sort out the right gear, will keep looking

and  learning.

I might put a E-Flite 25 or a 32 in the Magnattila ?

 

Mike

[ken anderson.]

hello mike-same as the instruction's on a tin of tuna.......to me....   ..

 

 ken anderson  ne..1.

[Richard Wood]

Hi Mike,

The E-flite motor most suitable for a Magnatilla is probably the Power 46

as it can turn a much bigger prop than the smaller E-Flite motors.

The 32 is probably powerful enough on a 4s LiPo  but will be revving

quite hard on a smallish prop - a bit out of character for a Maggie.

 

Here's a much cheaper alternative for powering a Magnatilla:

Motor

[Mike Morcher]

Thanks Richard

 

Looking at that motor, the spec looks good and its also cheaper 

also a good site

 

Many thanks

 

Mike  

[Mike Morcher]

Hi Richard

 

Me again, I see you fly a Baronette with the E-Flite 32 motor

how does it fly ?

I was thinking of the 32 and a 12 x 8 prop on the Magnatilla, what size prop do you use

on the Baronette?

 

Thanks  again

Mike 

[Richard Wood]

Hi Mike,

The Baronette has a 13x8 wooden prop on the Power32.

It has sufficient power but needed a lot of right side thrust adding

after the very short maiden flight & is still waiting for the right weather

to retry!

 

I'm using a 4s A123 pack in the Baronette which has a fully charged

voltage of around 14.4V - quite a bit less than the 16.8V of a

freshly charged 4S LiPo.This means that a 12" prop is probably the

max diameter for a '32 on a 4S LiPo to keep current draw within limits.

Hope this helps.

 

Cheers.

Richard