View Full Version : Pinionsfor lepton
Italianbob2169
10-01-2006, 05:17 PM
I have just started to set up the lepton I have 4s with 80cc and 10t hyperion.the stock 24 seems like it runs it too fast what would you all recommend??
TMoore
10-01-2006, 09:42 PM
Works fine on mine.
TM
xircom
10-01-2006, 11:55 PM
works fine, but throttle % only around 50-60 max - is that ok with the ESC ? Have Jazz 80.
poerqwa
10-02-2006, 01:49 AM
If you want a smaller pinion, you might want to verify with Kövi (Istvan).
I received a nice 19 and 20 tooth pinion. This will improve flight times in my setup as I'm not looking for 3000+ rpms(now running 2500 at 50% of my Jazz on my Hacker a30-10xl).
Greetz,
Marc
xircom
10-02-2006, 07:08 AM
Sounds good, don't need more than 3000 either ...
pistol974
10-08-2006, 01:37 AM
I,m wanting to go to 4s from 3s, can I still use my Hyperion 8turn if I use a diffrent pinion? Also what pinion if it is possible?
Thanks
pete
After the 19T and the 20T pinions the 21T, 22T and the 23T will be available from the end of the next week.
Regards István
buster1
10-20-2006, 03:50 PM
Regarding the 21,22, or 23T pinions - what will be the most optimal setup for the 4S config - I am running hyperion 10 with 3700 litstorm 4S batts,
Will a smaller pinion be better for this setup,
Jeff
poerqwa
10-20-2006, 04:13 PM
Jeff,
It all depends.
1. are you running in the range of RPM's you like?
2. What's your ESC throttlecurve percentage.
The fact is that an ESC performs more efficient near or at it's max throttlecurve percentage.
So when you lets say have a curve at 50% while being in your preferred rpm range you are wasting energy(read flying time).
That situation will improve by matching pinion(less teeth) to flying style.
Greetz,
Marc
Finless
10-20-2006, 10:17 PM
My math says I will be able to run the ESC up to 100% idle curve and have about 2900 RPM with the 22T pinion with the Hyperion 3025-10. But thats the math. Once Kovi has the 23 and 22 I am buying both to experiment.
Bob
xircom
10-20-2006, 10:59 PM
So I have made the following file today, with Jazz 80 / Hyperion 3025 10T and PQ 4S 3700, 4 different idle up's with 65%, 60%, 55% and 50%, you can see the RPMs measured with Eagle Tree (TM) sensor using 24T pinion gear, means
65% -> 2550 rpm
60% -> 2460 rpm
55% -> 2370 rpm
50% -> 2280 rpm
So if you are going to plot this in a chart, and extrapolate higher, then you can see the rpm/throttle% (if the motor/battery does not get weaker), that means you would have 3000rpm with 90% etc.
3000 rpm is for me a bit much, it feels comfortable with 2600 rpm, so that would mean 90% throttle x/24 = 2600/3000, so x=20.8 or 21T for the pinion, if you would choose 22T pinion, then it would be at 90% 22/24 = y/3000 so y= 2750 rpm, which is also fine.
this is all just calculated, once I got 22T pinion, I can verify.
Michael
xircom
10-20-2006, 11:08 PM
one more thing I forgot: I had cyclic to trottle mix on still, even governor (stupid, just forgot), this is why rpms are not very nicely flat - will turn it off next time ! :oops:
Finless
10-20-2006, 11:58 PM
I am at 85% and get 2900 head speed. Personally the heli flys great at that speed and the tail works great.... Your HS numbers look just like what I get at those Throttle curves using a simple tach. I dont like having my ESC dialed down that far and I like the 2900 head speed. The heli rocks with a good head speed.
Bob
xircom
10-21-2006, 12:53 AM
nothing against simple tach and/or high headspeeds at all, just thought graphics would help for people to understand what is going on :)