JGF "Just Go Fly" 500TH/install and review thread

[OICU812]

This will start as an install notes and review thread, and eventually end up with a full flight report and data from FDR.

Here are the site specs of this motor:

Just Go Fly 500th Tractor motor
Price $59.95
Website to view or purchase:
http://justgofly.com/Order%20Form.htm#500_Motors
57 grams
32.6 mm in diamter
KV: 3381
IO: 2.4 amps @ 10V
RM: .0172
36 amp max <<<< WOW!
400 Watts <<<< WOW!

First off this motor has a real nice appearance to it and appears in full to be as all other JGF motors, made very well.


Some quick notes to know.

it comes with 4 "3mm" phillips head machine screws, I advise using 3x6mm hexheads with a lockwasher, this is perfect length through the stock rex motor plate and gets you 80% into the bottom plate of the motor itself. You will also may want to file or sand down the one side of your middle frame where the motor mount is in place, this is to allow the motor wires enough room to point forward for hookup of your esc, I did this but it is not necessary, I just did not want the wires stressed in any way or touching anything. The way the wires are situated in the can this is the only way it can be mounted, also due to the motor mount hole spacing. Next you will also need a round file or a dremel bit to widen the motor mount slots to fit the 3mm bolts as the stock slots will not allow past 2.6mm. The motor does not come with a flat spot on the main shaft, I took the dremel and the grinding disc and made a small flat spot just to be certain. These are very quick things to do and very easy, less than 5 minutes to do all, but you should be aware of these things before mounting this motor up.

The motor with Pinion on and with esc ends came in at 64 grams, compared to the NEU 1107/24 at 102 grams that is a significant weight saving!

On the bench I first tried the 14 tooth, note these are 3.17mm pinions, they can also be bought from JGF.
Anyhow 14 tooth was too much, at 75% it was in the 3300+ range. Changed to 13 tooth and recalibrated my Jazz 40-6-18 and at 75% I was getting 3000 rpm at zero pitch. I feel 13 tooth will be the best range as this 3K HS was with an older 15C lipo. New gen packs such as FlightPower 2170mah packs with 25C should get you in the 3100 range at 75%, which is perfect imho. **Note** Depending on your esc and your packs etc, you may get different RPMs than mine reported. It would be wise to get a 12,13,14 tooth to obtain your preffered Headspeed with your esc and setup. :wink: I should also say at this time it would be wise imho to make sure you are running a pack capable of delivering the power this motor will need and demand, a pack that will also take the amps and watts this baby will pull. Packs like the FlightPower 2170 25C burst packs or the TPX 3S packs should do as well. Older gen packs or cheaper lipos may result in poor performance or puffed packs.

That is as far as I am at right now. Waiting on my new FlightPower 2170 slimline packs to come in and some better weather than I will get a chance to light this baby up. So far I am thinking it will be a winner. I have had a few JGF motors on other helis in past and their performance was excellent, and Vinnie owner of JGF is a really helpfull person and stands behind his product.

Here are some pics to show the motor and some poiints discussed.

[franky92]

price?

tested? how it is???

[Rodan]

Nice. Looking forward to a flight test.

I'm running the JGF 450TH and am very happy so far. The 500 should be off the charts!

[Lorents]

Looks good Shawn! Looking forward to the flight report

[rdlohr]

Nice job on this thread. Can't wait to see where it goes!

Rick

[Striker]

Hey Shawn,
I just received my 500th motor as well and I'll be installing it soon. I have a coupe q's about your post:

1) You say your running the jazz at 75%, what is the reason to not run at 100%? If it's for head speed why not run a different pinion at 100% to achieve the desired head speed?

2) You say you re-calibrated the Jazz. How is this done? It was my understanding that each time you power up the jazz it calibrates itself to the current battery/motor setup.

I'm a bit on a nOOb when it comes to this aspect. Any help would be greatly appreciated.

Thanks,
Eric James

http://www.expertmagic.com/

[OICU812]

price?

tested? how it is???

Price = $59.95 and listed on the site I provided in original post,
http://justgofly.com/Order%20Form.htm#500_Motors

how it is? As I said in original post I have not got to the flying and flight data part as I am waiting on my lipos. Cheers.

**Note** I do not work for JGF, nor am I affiliated in any way. I am just a guy here testing a motor and sharing information for all of you, be well.

[OICU812]

Originally Posted by Striker

Hey Shawn,
I just received my 500th motor as well and I'll be installing it soon. I have a coupe q's about your post:

1) You say your running the jazz at 75%, what is the reason to not run at 100%? If it's for head speed why not run a different pinion at 100% to achieve the desired head speed?

2) You say you re-calibrated the Jazz. How is this done? It was my understanding that each time you power up the jazz it calibrates itself to the current battery/motor setup.

I'm a bit on a nOOb when it comes to this aspect. Any help would be greatly appreciated.

Thanks,
Eric James

http://www.expertmagic.com/

1.) Because when you run any electric on governor mode in whatever esc it is you run, it is much better to run at 75% allowing headroom for the governor to work 100%. Through hard collective maneuvers you absolutely need headroom for the under and over speed effect that takes place.

2.) Simply put the black jumper on while power is off, turn it on, pull it off after intitialization, let it beep to 1 beep, throttle stick all way up, then let it beep once disconnect the power. The re connect with jumper in again, pull after the beep and initialization, let it beep to 4 times and throttle stick then to high, allow for the 4 beeps then dis connect power again and pull jumper. You are now recailibrated and in governoro heli mode, that is all.

Note It simply is good practice to recalibrate the modes on the Jazz when using a different or new motor. If you are running same motor this only ever needs to be done once. I have had the Jazz hang up on it's timing and once recalibrated it is fine, this only ever happened to me when trying a new or different motor, this is why I mention it as a peice of mind thing. Cheers

Hope that answers your Qs' so far.

[Striker]

Hey Shawn,
That makes more sense now.

So even using the 430L I should re-map my throttle curves to a max of 75%, is that correct?

Right now I have them going to 100% and my idle 2 is 100% flat.

Thanks,
Eric

[OICU812]

Eric,

What you want to obtain is the headspeed you desire. Depending on what your motor, pinion, lipo, esc is that % may be 60%, 75%, or even 100%. The ticket to best performace is 75%, and if you do not have the headspeed you wish to have you would then want to look at your gearing, maybe go one pinion up. However do note on these small t-rexes and the new lipos, fall-off of power is very hard to see or feel even at 100%. If you are getting your desired headspeed at 100% and you do not get any power fade off till at least 85% of your flight then you should be just fine where you are at. My comments and thoughts are directed primarily at running governor mode on electrics, which is my preference by far as the trasitions through modes and maneuvers are much smoother imho.