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› 12T vs 13T Scorpion 2221-8 3D
03-17-2009 01:38 AM  8 years agoPost 1
LaurenceGough

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Reading, UK

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Hi guys,

A while back I was using a 13T pinion with my Scorpion 2221-8 in my Dragonus 450, this gave a very high headspeed and great performance. Flight times were just 4:30 so I decided to switch to 12T to try to get more.

With the 12T flying was a little more relaxed and I got about 6:30 but cyclic was quite slow. Nevertheless I have had about 100-130 flights now on the 12T. At first I noticed battery temps were just slightly above ambient, better than as with the 13T. But lately I have had to reduce the flight time down to 5:10 to stay below 80% of the pack. Currently I put back an average of 1500, 1600mah back in which is around where I like to stay. Between this time my skills have got a lot better and now I'm pushing it quite a bit.

If things haven't changed with the 13T then I'm only gaining 40 seconds of flight time for quite a lower headspeed (seems like 13T livens it up a lot more), doesn't really make sense right?

Before I change back to 13T I would like to hear what peoples thoughts are on this, is it just because there is less blade disk inertia to bring it through quick hard moves with the 12 (causing additional strain)?

I must admit back when I was on 13T I wasn't TOOO hard on the lipo, but still not too easy on it.

Still think I'll get 4:30 out of it on a 13T?

Just wanted to start a discussion, this would be interesting for me to know.

Packs are 2200mah Kong Powers and Outrage's.

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03-18-2009 06:53 AM  8 years agoPost 2
pcliftonjr

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Phoenix, AZ

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I like 13T

I'm flying that motor in my BEAM with a 13T pinion. I get 5mins and put back around 1800mah in a 2200 pack. I'm using a 90-80-90 curve and the performance is ballistic! I'm actually considering dropping the curve a bit to get more flight time.

Paul

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03-18-2009 09:04 AM  8 years agoPost 3
naked painter

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Mid glamorgan uk

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Hi

It may be worth searching in the Miniature Aircraft forum under "Furion".

I run a -6 so can't really help.

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03-18-2009 12:03 PM  8 years agoPost 4
LaurenceGough

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Reading, UK

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Thanks Paul, that's just slightly over 80% usage of the lipo I like to keep a little on the safer side of 80%.

I'm also using a flat curve 100% so it looks like I'll get around 4-4:30 flight time.


naked painter I'll take a look there now, thanks.

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03-19-2009 04:08 AM  8 years agoPost 5
deafheliflyer

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Arizona

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hi

I was using 12t with the Scorpion -8 on my MiniTitan... It was ballistic.. 13t was nice if you have collective management, otherwise 12t was more than adequate for me.

Crash-Prone and overcoming it!!!

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03-23-2009 10:47 PM  8 years agoPost 6
Richardmid1

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Leeds, England

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Depends on how good your packs are, with very good 30C packs, 12T will give about the same HS as an older pack on 13T.

60% of the time, it works every time!

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03-23-2009 11:45 PM  8 years agoPost 7
LaurenceGough

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Reading, UK

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Packs are 2200mah Kong Powers and Outrage's.
(30C's)

So headspeed on 13T is a fair bit more. I will change in a few weeks time, or whenever I need more cyclic speed, for now I'll just stick to perfecting less cyclic demanding manoeuvres.

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03-24-2009 10:54 AM  8 years agoPost 8
Richardmid1

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Leeds, England

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Try increasing your cyclic pitch if you haven't already done so. You could also try lighter paddles and/or blades.

60% of the time, it works every time!

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03-24-2009 12:28 PM  8 years agoPost 9
LaurenceGough

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Reading, UK

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Cyclic is already maxed out to almost binding Thanks though.

Yes I think I'll perhaps try lighter paddles, blades are Radix and I love them so rather not change them at all.

Think it just needs 13T seems to be the norm with 450's .

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03-24-2009 02:16 PM  8 years agoPost 10
Micro-Maniac

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Pasco,Washington​Formerly: Captain​Chaos

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I've had a similar experience with my T450 - Thought I'd try getting more flight time and cooler temps by dropping to 12t but instead seemed to be putting the same Ah back into my packs with no change in temps but I did like the way it handled on 12t except it was a little too boggy so I went back to 13t and reduced my swash mix a bit to have that "relaxed" 12t control with 13t power

Summery: Higher HS requires less blade deflection resulting in less HS loss compared to lower HS requiring more blade deflection for the same control rate resulting in more HS loss and more amp draw from the deeper bogging

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04-02-2009 09:24 AM  8 years agoPost 11
ki-gas

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All over Europe,​mainly England

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I'm running stock MT motor, 13t pinion and stock 40A ESC with radix blades. I get 6.5mins from TP 2250mah 30c pack with around 10.8v left on landing. I'm thinking of fitting Scorpion 2221-8V2 still with 13t pinion, will my flight times come down to 4mins?

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04-02-2009 09:50 AM  8 years agoPost 12
Micro-Maniac

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Pasco,Washington​Formerly: Captain​Chaos

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IMO it sounds like you're draining your packs too low as it is and should reduce your flight times anyways - I don't think the -8 motor will have any noticable impact on your flight times as it did not change any for me

Do you have a decent charger that tells you how much Ah it puts back in your packs? - With those packs you shouldn't be pulling out more than 1800mah and I suspect you're pulling well over that by running down to 10.8V

Until you know how much capacity you're using I recommend stopping at no lower than 11.1V if you want your packs to keep any punch for more than a couple dozen cycles and for me thats about 4 minutes on my T450 with both stock and scorp motors with 13t pinions

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04-02-2009 10:05 AM  8 years agoPost 13
Richardmid1

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Leeds, England

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The scorpion HK-2221-8 is far more efficient than the stock MT motor so your flight times will go up. 10.8v is a bit low, I like to see nominal voltage when I plug into my charger after a flight i.e. 11.1v, you should be sticking to the 80% rule (only take 80% of the capacity of the pack).

60% of the time, it works every time!

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04-02-2009 02:13 PM  8 years agoPost 14
ki-gas

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Thanks men. 10.8 is the lowest but it is around the 11v mark mostly, I'd still get 5.5mins I'm sure.

M-M,

Yes, I have a couple of Astro flights and I must admit my TP2250 takes around 1800mAh when charged.

Will my performance go up with the HK2221-8V2 if I keep stock 40A ESC?

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04-24-2009 12:12 AM  8 years agoPost 15
butters149

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monterey park, ca

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If I currently have a jgf 500th on my trex 450 with a 14T runing a 100 flat idle curve. And if i am going over to the 2221-8 with a 13T would a 100% idle be faster then the jgf500th? which is only 3380 kv.

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04-24-2009 12:19 AM  8 years agoPost 16
Micro-Maniac

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Pasco,Washington​Formerly: Captain​Chaos

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About the same..

500TH/14t = 3151
2221-8/13t = 3112

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04-24-2009 12:24 AM  8 years agoPost 17
butters149

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monterey park, ca

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maybe i will sell my brand new scorpion motor and esc then. since the jgf will yield me more headspeed and still use the stock 35amp esc.

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04-24-2009 12:51 AM  8 years agoPost 18
Duckster

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Brunei

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I ve been using it with 14T, my flight time are only set for 4.30 and i will probably overshoot to 5 minute, the thorttle curve is 100-80-100 due to governer off, an electric gov is not as good as nitro gov, and it drain the pack more then normal, since this motor are hardly bogged down soo i dont really care about the governer on the 450 size, soo far i have this motor and setup for more then 100 flight, bare in mind the battry pack is only have the high performance for just 50 flight, and if u fly ur heli for about more then 5 minute u will shorten up the life of ur battery, and at the moment i ve tried couple type of battery Kong Power , Zippy Pack, Thunder Power V2 and chek thos battery at Century RC V-Plus 33C the power and the life of this battery is awsomme relly love the performance, i think i gonna buy another few pack.

Trex 600,700 AND 450, GY611, GY401, OS5H, OS91HZ, MGP, HS65HB, Scorpion 2221-8,

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04-24-2009 12:55 AM  8 years agoPost 19
butters149

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monterey park, ca

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using what? the jgf or the scorpion?

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04-24-2009 01:33 AM  8 years agoPost 20
Duckster

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Brunei

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scorpion

Trex 600,700 AND 450, GY611, GY401, OS5H, OS91HZ, MGP, HS65HB, Scorpion 2221-8,

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› 12T vs 13T Scorpion 2221-8 3D
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