10S or 12S better?

[dcope17]

I have a TT Titan X50E I'm working on right now... I have a 630KV motor that can run up to 12S.
On 10S, I can leave the gearing stock and achieve the head speed I'm looking to run... or I can go 12S and change the gearing to still give me the same head speed.
Which one comes out better? assuming the same watt/hrs in both the 10S or 12S packs, is it better to spin the motor faster with less torque on it because of the lower gearing? Or better to spin a bit slower but more torque.
I know that loading a motor ramps up the current draw quickly but does spinning it faster eat up equally as much power?

Anyway, thanks for the help everyone.

[Stolla]

Always go for the higher voltage option, batteries last longer esc works less, more power etc.
If the kv is too high for the available gearing rather change motors, pm me if you need advice on motors for the x50

[dcope17]

Suggested setup with the 630KV motor is 10S and 15T pinion With 135 spur gives a 9:1 ratio
37V x 630KV / 9 = 2590RPM max head speed. From my understanding, running a 2200RPM to 2300RPM puts the motor at 85% - 89% which is in its efficient range.

44.4V x 630KV / 10.385 (13T pinion) = 2693RPM max head speed
Running 2200RPM to 2300RPM puts the motor at 81% - 85%

44.4v x 630KV / 11.25 (12T pinion) = 2486RPM max head speed
Running 2200RPM to 2300RPM puts the motor at 88% - 92%

I don't know where the efficient range of the motor is... but someone once said between 80% and 90% of the max RPM.
Looks like the 13T puts the motor in the efficient range but the 12T even though runs the motor a bit faster, there is less drag based on the gear ratio.

What pinion would you run?

[Stolla]

Its not as simple as running the motor in the advertised efficiency range mostly because you are running a governor and need enough headroom for the gov to do its job, so depends what esc you use, on jive we run high headroom, i.e larger pinion as jive can handle high amps and can handle lower pwm measured with logging equipment than most without overheating or overamp. As a rule if you want to run lets say 2200 rpm you need to be geared for approx 2500 to be sure you have enough headroom. Dont be concerned about running motor in its efficiency range as following this rule you are in the ballpark.
I run larger pinion rather than smaller because performance is terrible if you run out of headroom, i.e pwm hits 100% too often, believe it or not most people dont realise they run too small pinion. Off vourse you have to be sure your esc can handle higher amp associated with larger pinion and sub 100% pwm, on your above calculations i would have run the13 t on jive if i wanted 2300 on other esc's the 12 to be safe

[TomC]

I run mine on 10s (4-5000 mahr) packs with 560kv motor, 16t pinion, gov'd to 2100-2200-2300 (mainly fly it at 2200) w/kontronik esc. Fly's great and nothing gets too hot.

I've always found that all my 600e heli's run fine on 10s. Larger 700e heli's def like 12s better though, esp. if you want to run them hard.

Also, I have a large supply of 5s4-5000 packs that I use on other planes/heli's so it's an advantage for me to stay 10s on this heli. To be honest, if I did not have any packs I probably would have gone 12s for slightly better eff's.

Cheers,
TomC

[dcope17]

I went ahead and ordered 2 6S 3000mAh packs. Amperage shouldn't be a problem with my CC Phoenix Ice 120HV.
6S packs are more common and if I ever buy a 500 bird... I'll have packs already.

I see what you mean about having enough headroom. I'll likely go 13t... But will buy a 12 also ( only $8.99 ) I likely won't be running 2300HS until I get better. I have nitros and they max at 1750HS.

At first... I'm looking for a longer flight time. Since I'll only have one set of packs for a little while. As I progress... I'll be ramping it up.

Unless you experienced guys think otherwise. Should I start full bore and just get used to it and never then need to change it down the road?

[SamIAm]

2150 is plenty for sport and mild 3D, especially if it's governed. This heli can achieve more than 15 degrees of collective but you should only need 13. Learn everything slowly and then do it faster as you progress.

[blade2]

On page 25 of the X50E manual it says "do not exceed 2400rpm". I'm running scorpion HKIII-4025-550kv with castle HV80 ESC 15 tooth pinion and stock main gear. My headspeed in normal mode is 2150 and my stunt 1 headspeed is 2330. My throttle curve in st1 is flat 80, I'm also running 12s 3300mah batteries no gov. Motor and battery and ESC run cool. Crazy power.

[Digger1973]

How well does 2 3300mah 6cell packs fit the air frame? I am thinking of either an x50e or (cough cough) align 600 pro. Anyone that knows me knows I am not an align fan but I do love my mini titan and with selling off my gasser I want to go to a 600 size electric.

[bluepilot2003]

I currently run 2x 4000mah 5s packs but have put my blue turnigy 6s 5000s in the battery tray to see how ridiculous it would look. But besides sticking out the sides of the frame, they fit just fine. So 3300s should fit pretty well in the frame.

[gwright]

Use 10S (two 5S packs) 4350 and 3800 but have used 5000's a number of times. I know one guy here that uses 12S/5000, same packs he uses in his G4/E720. they're a touch tight but work. Kinda heavy though for a 600 class machine.

[blade2]

My two 6S 3300mah fit just fine and barely hang over the battery tray on each side. It has great power running on 12S and the batteries aren't to heavy. I do mild 3D and get 5 to 5 and a half minutes of flight time. I have a few Align helis and the X50E quality is above the align, the one thing I don't like is that is comes with a ABS plastic canopy. My canopy split in front of the canopy post and they replaced it with a fiberglass canopy for free. Tower Hobbies has great service. I don't think you will be disappointed with a X50E, I have several helis and my X50 is the best.