15T pinion on a 500M..

[zaboaa]

Using a 14T now, in gov mode (Set-RPM on my Ice 100) max RPM it will allow me is 2600 RPM. Would like around 2800, would a 15T be too much?

[snjbird]

I have a 16T on my Scorpion 3026-1600... the stats are very close on the two motors. I am finding that 2600 is a pretty nice HS with the governor, as it will hold the HS better, and feels like a higher HS, but the flight time is better than 2700-2900:)

[Felt]

Using a 14T now, in gov mode (Set-RPM on my Ice 100) max RPM it will allow me is 2600 RPM. Would like around 2800, would a 15T be too much?

Zaboaaa, lets us know what you find. I'm going to upgrade to this motor soon.

[zaboaa]

Zaboaaa, lets us know what you find. I'm going to upgrade to this motor soon.
ok it's in the mail now, I will try it out when it gets here. I'm happy with the 14T, but wouldn't mind just hair more umphhh;)

[life2short1971]

what are you getting for flight times and what are you hoping to get?

[Paulice]

I have a 16T on my Scorpion 3026-1600... the stats are very close on the two motors. I am finding that 2600 is a pretty nice HS with the governor, as it will hold the HS better, and feels like a higher HS, but the flight time is better than 2700-2900:)

What sort of flight times are you getting with the 16?
and what lipo's are you using??

Thanks
Paul.

[steffgiguere]

It's ok to run the 15tooth pinion and then get the gov to limit the speed to 2800. That is what I'm running with a Scorpion 1600KV and 15T pinion, only on the ICE 75 ESC. Have over 300 flights in this mode and everything is great for me.

[snjbird]

With the 1600 and the HS set to 2900 I was only getting 3 minutes with the Flightmax 2650 30C pack, the temps were fine, but it was yanking 2000+ mAH out in 3 minutes! With the HS set to 2600 I am getting 4 minutes, and the heli flies better than it did with fixed end points and a 13T on the stock ESC. mAH return is less than 2000 after a good hard 4 minute flight!

[v58fuy]

Guys,

I am a little confused about the whole electric governor thing.

If you run a 13T system without governor and a slight V curve like 100,95,90,95,100 there will be some rpm reduction under heavy load, but I thought this is due to the limitation of the lipo/motor combination.

Now if you run a 14T or 15T pinion you have a higher potential rpm range, so when the governor is set to the same rpm as in when using the 13T pinion - there is spare rpm for when the heli is under heavy load.

But with a larger pinion you have effectively increased the gear ratio and the heli will reduce rpm quicker under load !!

Surely the best way of running a governed system would be to run the same gear ratio i.e. 13T pinion but run a higher KV motor?

I might have got this all wrong but I'm not sure.

David

[Paulice]

Guys,

I am a little confused about the whole electric governor thing.

If you run a 13T system without governor and a slight V curve like 100,95,90,95,100 there will be some rpm reduction under heavy load, but I thought this is due to the limitation of the lipo/motor combination.

Now if you run a 14T or 15T pinion you have a higher potential rpm range, so when the governor is set to the same rpm as in when using the 13T pinion - there is spare rpm for when the heli is under heavy load.

But with a larger pinion you have effectively increased the gear ratio and the heli will reduce rpm quicker under load !!

Surely the best way of running a governed system would be to run the same gear ratio i.e. 13T pinion but run a higher KV motor?

I might have got this all wrong but I'm not sure.

David

I think it's a case of find what is best for your flying style,
Some for hovering only need a relatively low head speed but for hard core 3D then a much higher head speed is needed for the speed of the cyclic controls, but at the loss of flight time!
the 500M and the scorpion that I have (1600kv), have so much more power than the 500L so bogging the head is not so much an issue, it's more governing the head speed you want to have!
With a 13t pinion the max governed speed is about 2400.
and about 2900 with a 16t

[snjbird]

Yes it is about finding the sweet spot. motors have a best power range of RPM, and if you can gear to be in that range and have the HS you want then your setup will be optimal!

[zaboaa]

I put in the numbers in castle link for the 15T, it basically gave me the same head speed. To Set RPM with either pinion the (14T or 15T) max head speed was 2610 RPM. 2700 was too high on both. Interesting, I thought maybe I could push it up to 2700-2800 with the 15T...

[NorthNJMark]

here's something a little funny, just for the hell of it, i took that typhoon 500 motor off that piece of crap HK500 and put it in the rex to see what it would do... and with a 100amp esc i have to admit... the thing is a damn rocket ship.. people at the field were telling me that i was lieing to them when they asked me if i was running a scorpy motor and i told them no..
with a 12T there wasnt anything i could do to make it bog, tried a 13T, same thing... insane power and responsiveness...im almost afraid to try a 14T

one of the guys ordered a 500M and another one ordered the 1600kv scorpy.... so i cant wait until they get them and we can do a side by side test.....

but i cant tell you this.... the HK500GT kit from hobby city...... CRAP!!!!!!! doesnt fly worth a dookie.... but this little typhoon motor... i think it's found a permanent home in the rex....

http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=9258