Could someone let me know how they are using a Fantom dyno to check brushless motors?
I have heard that you use the speed control to power it, but I would like to know the proper method.

Thanks

You need:

I really want to try to see for myself if there is much diff in say a 33 inductance motor and a 34-36

To compare if the inductance is the difference, Use the SAME rotor, and the Same Timing on each of the motors.

thanks

just curious but what does a 13.5 look like on the dyno (numbers)

Looks just like a 13.5 not on the dyno!>>>>>>>13.5<<<<<<<<<<<<

........

I knew you were gonna say that! lolLooks just like a 13.5 not on the dyno!>>>>>>>13.5<<<<<<<<<<<<

reads like a decent stocker but I bet that motor will run circles around a stocker with those numbersThe Motor I won with at Daytona in 13.5:

>>>>>>>>>>13.5<<<<<<<<<<<<

Fantom Dyno

Max power 58.68@8874
Max RPM 16200 RPM @ 1.70 sec
Max Torque .857
Max Eff 96% @ 14040 RPM

inductance reading were 57 to 58 rotor was 12.3 at about 1250

Looks just like a 13.5 not on the dyno!>>>>>>>13.5<<<<<<<<<<<<
I haven't laughed that hard in a long time. :woohoo:

10,000 comedians out of work and these guys are always trying to be funny!

we use the dyno a reciever and a speedo Hook the motor to speedo and then use the red and black wires to hook up speedo to dyno ..Now take your radio and pull full trigger and hit the dyno button ..... It works the same everytime and no need to keep charing the batts ....

SRM

SMROCKET,you do not use a reciever pack right?If so this does not cause a problem with the reciever or speedo?That sure sounds a lot easier to me.

when you dyno these brushless motors aren't you worried about seperating the rotor since your not to supposed to free spin brushless motors in the first place

The flywheel or slave motor (depending on dyno) provides a load so it isn't really free revving them.

So Can You Use A Much More Engine Dyno

I don't know much about the much more "dyno". Does it just have a little magnetic coupling thing to read rpm? If so, that would be basically free revving it.

Yes It Just Has A Small Round Plastic Nipple With Two Reflectors On It

Hi Dave --- Hasnt been a problem since we started playing ........

NO NEED for a receiver pack it gets hooked to the speedo like normal SRM

Let me guess, the higher the rpm of the BL motor the better it reads on the Phantom dyno ? If so, then what is it really telling you? Same debate we had with brushed stock motors.

EROCK where you been ..... We use it to get a number for a complete package . Ie speedo and motor I have also seen the Turbo 45 used for the same thing ....

EROCK get back to racing ASAP .... Hope all is well with you SRM

Rocket - Still enjoying retirement. Just traded the last of my "racing" equipment for an Associated 18B to fool around with. Classic is opening up a dirt clay oval and offroad track this summer. So I might run the 18th scale some there.
This way they have all 4 surfaces covered (carpet, asphalt, clay and offroad).

i hope to be checking some motors on my turbo45 dyno soon... is there a "good" motor scale versus a "weak" motor? or any other things to compare to find the strong motors v/s the weak ones? also what about determining gear ratio for a peticular motor? mind you i have never dynoed anything so i want to ask as many q's as possible.

thanks

Which Wheel Would Be Better To Use With The Brushless Motors Steel Or Aluminum?

just curious but what does a 13.5 look like on the dyno (numbers)

The best motor I got on the Fantom is 66.5 watts, 1.05 torque, 17100 rpm, 87% eff.


Doug P

I picked up a Fantom dyno to play with because I could get one very cheaply. The main thing I discovered so far, which I already knew to some degree, is that they are useless. Since it doesn't have a true torque measurment RPM is all it really tells you, which is useless with BL.

It can also tell you if there is a major problem with something. which there is some value in.

Anyway, to answer the question I used the aluminum wheel, but I think the steel might be a little better.

Wish I had a turbodyno though.

I picked up a Fantom dyno to play with because I could get one very cheaply. The main thing I discovered so far, which I already knew to some degree, is that they are useless. Since it doesn't have a true torque measurment RPM is all it really tells you, which is useless with BL.

It can also tell you if there is a major problem with something. which there is some value in.

Anyway, to answer the question I used the aluminum wheel, but I think the steel might be a little better.

Wish I had a turbodyno though.
i SURE DO MISS MINE, i THOUGHT i'D NEVER NEED IT AGAIN

Torque is calculated from the the acceleration rate of a known mass, the flywheel. Doesn't make any difference if the motor is brushed, or brushless.

a steel versus aluminum wheel wouldnt make a difference because of rotating mass?

Torque is calculated from the the acceleration rate of a known mass, the flywheel. Doesn't make any difference if the motor is brushed, or brushless.

Very true. I guess I should say it is useless with any motor. The consistency of a BL motor just makes it more obvious.

I will say though, that I thought the Fantom was marginally more effective with brushed motors. I think it's possible that the characteristics of the BL motors could require a different mass flywheel or tweaked programming. I don't know.

It definitely does not properly calculate the torque though.

Pat, do BL motors spin up really fast on that dyno? I'm wondering if since the sensor is only getting a reading once per revolution, that the motor is accelerating faster than the amount of times the sensor picks up the rotation. going to a heavier flywheel would help slow the acceleration down. Another thing that might work is having more holes in the flywheel, that would make the RPM be way off though without some rewrite in the software.

They spool up in about 1.7.

I agree the heavier flywheel would probably be better.

has anyone tried putting a bl motor on a turbo dyno 45 ? and if so how do you do it?

has anyone tried putting a bl motor on a turbo dyno 45 ? and if so how do you do it?

I never try, I do.....Do you have a Turbo 45 Dyno?

All you need is a seperate radio system and a spare speed control to power the motor. I think you just use the radio and speedo to spin the motor up.

what you need is
1 your radio
2 any rec.
3 your speedo you wish to dyno
4 your motor
if you are using a spektrum you need a rec. pack (any kind)

yes, i dyno with a turbo dyno 45 and havent tried to dyno brushless stuff yet and was just looking for info on doing it

Fantom is going to introduce a brushless motor dyno soon!!!! I think the realese date is around Dec. or Jan. 09

Fantom is going to introduce a brushless motor dyno soon!!!! I think the realese date is around Dec. or Jan. 09

I wonder if they will make a upgrade for the blue and red clamp fantoms......maybe send them in a get them upgraded that would be great......:thumbsup:

if anyone wants a Fantom dyno i have one to sell, $300 for dyno and laptop computer with software..or make offer

Shane 816-935-8151

Guys, I got a fantom dyno, and i'm trying to test brushless motor. I notice the following, if I turn on my rec. batt. pack, without connect the wires from the dyno to my speed control, and I hit my radio throttle the motor spin a little. Is that ok? because when i connect the dyno wires the speed control will have power from 2 sources.

Dennis.

Guys, I got a fantom dyno, and i'm trying to test brushless motor. I notice the following, if I turn on my rec. batt. pack, without connect the wires from the dyno to my speed control, and I hit my radio throttle the motor spin a little. Is that ok? because when i connect the dyno wires the speed control will have power from 2 sources.

Dennis.

don't worry about it.

Do you have a Tekin and yes that happens. Not sure it is good for the ESC, but I have seen the same thing in the cars when I used to use a RX pack.

The movement comes from the Caps on the esc discharging.

this is a interesting thread found some info out I didn't know

Do you have a Tekin and yes that happens. Not sure it is good for the ESC, but I have seen the same thing in the cars when I used to use a RX pack.

Yes it's a Tekin RX-8. Then, it's ok to test my motors. THANK YOU!!!!!!

Well, Don't work for me. Guys, can anybody tell me how to do this? I use a 12V car batery, and 5 AA batt. for the receiver. Any help will be appreciated.

Thanks.

The power wire to the Dyno from the 12v BATTERY SHOULD BE 36 INCHES and 18 gauge wire.

Here is a fun one for all to ponder...

What if you took a TurboDyno...and changed the coupler to accept an extened axle from a chassis dyno. Combine it with the Eagle tree unit. Then you can dyno motors, and then toss it in the car. All the TurboDyno does when hooked to the chassis dyno is add the amp draw to the slave to calculate the needed axle RPM for roll out.

If this would work then in theory could someone w/ the Turbodyno have a chassis dyno @ a fraction of the cost and headache?