Guys,

I am looking at the electric power for the first time so not much idea. I have this b/l motor and I notice
1) The end where the wires come out is the end that has a shaft sticking out (end a).
2) the other end rotates as the shaft rotates (end b)
3) the spinner adapter provided does not fit the shaft. I think it needs to be screwed on to the motor (possibly at end b).
4) If I understand correctly, to fit a prop on to the shaft I would need some sort of adapter which needs to be bought separately.

So the question - is there a difference which end the prop is fitted?

regards
Pankaj

I believe you can do it either way.

Either you can go with the "prop saver" setup (the stuff in the small plastic bag below the shaft) on the shaft side (end A) OR you can screw in the prop adapter on the other side (end B).  Depends on your preference, and also how the kit suggests the motor to be mounted (if it is an ARF).

It looks like the prop saver for the shaft side is already supplied, so no need to purchase it separately.

You may even be able to reverse the shaft if needed; but typically one of the two cases above should take care of the requirements.

Pankaj

The collar in the plastic bag is to be assembled on the shaft if you use the prop adaptor directly on the rotor, so as to provide for an additional safety preventing the bell (the rotor) from flying out because of the pull of the prop.
The prop adaptor can be fitted to the bell by the three allen screws. I think your problem is that the supplier has not provided you with these three screws.

Saju

There is only one end to which the propeller adaptor will fit. The longer end of the shaft. And you need to unscrew the adaptor then place it on the shaft and then insert the prop and then screw back the adaptor head. What you have is an outrunner, meaning that the coils seen thru the back end of the motor remain stationary while the outer case spins. Considering your experience with this system pls. be very careful and follow the steps how to connect an ESC, then how to connect the battery etc.

Just reconfirming what you said Sai.

I have seen many BL outrunners where the situation I explained above is the standard ("prop-saver" attached to shaft on one side OR "prop adapter" screwed to the rotating case on the other side). Based on this, can you confirm your above statement ? I might get to learn something here 

Further,

Are there different props for electric and nitro?

Pankaj

Yes.  There are separate "nitro" and "electric" props.

And even within electric you can get "stiff" and "flexible" ones.

http://www.rcindia.org/electric-power/glow-props-on-electric-motors/  (Hint:  Search ! )

OK Guys,

Just layed out the components and tried to see what fits where.

Theprop adapter can fit directly into the body via the 4 black allen screws and then there is a washer and a nut to hold the prop.

On the shaft side, there is small adapter with an allen screw built-in. I guess that would serve the purpose of holding on to the shaft (as Saju says) otherwise if I do not see how a prop can be fitted directly onto this adapter other than hammering it in. Otherwise I would need to procure a prop saver/adapter.

The X shapped is jig can probably be fitted directly into the firewall (outer holes) while the inner holes are used to attach this contraption to the motor body.

Correct me if I am wrong.

These out runner motors can be mounted behind the firewall or motor mount front face and also to the face of the firewall from out side. With the mounting accessories that came with your motor you can mount the motor to the firewall with the supplied X-mount and the prop adapter fitted to the rotating outer case of the motor.
However you can also mount the motor behind the firewall in the nose of the planes like sailplanes and similar applications.In such case you don't use the X-mount and the supplied prop adapter. For such case you need a regular collet type prop adapter that can be fitted to the motor's shaft. My motor came with both types of the prop adapters.
In both cases you have to fit the provided wheel collar close to the motor as shown in the attached photos.

Yep.  You can always use a "prop-saver with rubberband" setting on the shaft side, and I thought I saw on the picture posted initially.

The small adapter, does it have two more holes in it ?  Or just one hole for the allen screw ?

If it has two more holes, then stick two nuts in it, and you have your prop saver. 

The shaft is usually held on to in place using circlips, but this may be a different case.

Dear Anwar,
this is a different case. It is not a prop adapter.It is a wheel collar to be mounted on the motor shaft to prevent the outer case along with the shaft coming out when rotating. Yes some companies use circlip to retain the shaft. But some companies like AXI,etc use the wheel collar system. The motors which use a circlip can only be mounted only one way because the shaft is extended the other way and uses a normal collet type prop adapter.These motors can be mounted only in front of the firewall using the X-Mount provided. They can not be fitted behind the firewall.
Rgrds
Rao

If the pull is to be prevented with the collar, I hope people also grind/file the shaft a bit (like 2 or 3 mm) so that the allen screw gets a good hold on a flat surface. A dremel or grinding wheel would be great, and we do this often while connecting pinion gears to heli motors (just need to be careful to do only enough of it, and not over do it).  Use of removable thread lock should be considered too.

Anwar


What you say will give a positive locking. But if you tighten the grub screws as it is that is sufficient. This is the case with some German brushless motors such as Robbe, Pulsar etc. which are highly reputed. In the case of the Robbe, this collar is provided in addition to a circlip already there.

I thought you did not like taking chances ?   

The contact area with a round shaft would be minimal, and the sole reason for doing this is reinforcement.

In a BL Outrunner, I have problem in fitting prop on motor, I want to know the rubberband can be used to fit the prop, Yes I have seen it in many pics, but in my motor these is not srews for holding the rubber but I have the holes, So I have to find the Right screws for them?

Check the attached image...

OR I have to buy prop saver to make the arrangement as below??? (any link to buy prop saver?)

http://cgi.ebay.in/Prop-Saver-Adapter-3mm-mm-three-bands-/110422958339?cmd=ViewItem&pt=LH_DefaultDomain_203&hash=item19b5b8a103

and

http://rcmall.in/index.php?act=show_product_detail&prod_id=16

Why do you want to use a prop saver when you can mount the prop directly on the threaded shaft and secure it with a nut?
One thing though whether you use a prop saver or directly mount keep the length of the shaft to the lowest possible size.Longer is the shaft length easier it is to bend in a crash.

I am not sure that the nut that came with the motor is enough for fitting the prop. Better to get a prop saver.

Rao Sir, Can you show me the pics of how you have mounted the prop in your models which would help me....

And I am not going to mount the prop at the end of the shaft.

- Srihari

Friend,
all my motors came with matching prop adapters and mounting hardware as std. included accessories. You can see them in the photos posted in this very thread earlier.

hai
towerpro motors have threaded shafts and they donot need prop adapters

i think its only possible with towerpros motors
check quadrotor thread  they use towerpro motors


http://www.rcindia.org/self-designed-diy-and-college-projects/quadrotor-build-thread/msg21993/#new

A lot of clarity/answers can be arrived at if you specify the exact model of the motor.  With TowerPro motors, the supplied nuts and washers work very well.  Of course a prop-saver has the added function of saving the prop (or even the motor shaft) in the event of a crash, but just for fixing the prop, the stuff that comes in the kit is good enough !

Hi All,

I have this motor, please help with fitting the porp saver as I don't want to use the prop adapter.

The problem is that the shaft of this motor is coming out from the wrong direciton. Can someone please guide me on how to reverse the shaft?

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=5685

Thanks
Hellyflyer

Anwar Bhai!
Is there any way to make a prop saver or adapter with scrap or material generally available at home...?
My motor has 3mm Shaft...