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Robbe › where I can buy pinion??
10-10-2005 11:42 PM  12 years agoPost 1
pabloss

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Capri island - Italy

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Anyone knows where I can buy a pinioni 12T and 11T for Twist .37 motor?? I want to try to fly with 4 cell kokam 3200 LiPo, and those are the pinions get right to not toast the motor.
Thanks for reply
Bye

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10-11-2005 02:12 AM  12 years agoPost 2
HugeOne

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Quebec, Canada

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There is no such thing on the market that I know of and I searched a long time, to make a 13T pinion I took a logo 14 pinion (mod 0.7) and put a sleeve to adapt it from 5mm to 1/8" shaft. A longer grub screw was needed as well...

Raptor e620 w/V-bar, Tango 45-06, Phoenix 85HV, TrueRC 12S1P 4000mAh

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10-11-2005 08:39 AM  12 years agoPost 3
pabloss

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Capri island - Italy

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But with this pinion the risk to toast the motor I think is high...
You tried to fly with this and 4 cells lipo 3200 kokam??
Someone try to fly with its???

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10-11-2005 09:00 AM  12 years agoPost 4
darrens

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United Kingdom

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If you want to run 4S you should be using a Twist 33, not 37

He who dies with the most toys is the winner!

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10-19-2005 09:44 PM  12 years agoPost 5
frensh-hélis

rrNovice

france, sud , near Nimes (gard )

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hi pabloss

i try to buy a 12T pinion but i don't see any pinion in mod 0.7

i ave an eolo with twist 37 and metal head !! ( full option) and 3200/3s kokam with 14t pignon !
but my problem is , i can't make more than 2000 head turn
i i made more than 2000 RPM for blades , there is a lot of vibration and it's not cool

i think with twist 37 and 3s/3200 the best is 11T pinion because you can use your motor at 90% but with the 14T pinion, i use just 60% of my motor

is there is someone who can give me a reference to buy a minor pinion than a 14T

thanks a lot everybody for your help !

and sorry for lot of english mistake !! ( but i'm frensh)

Frensh-helis

frensh pilot in 3d helis

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10-19-2005 10:39 PM  12 years agoPost 6
darrens

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United Kingdom

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The Twist 37 on 3S runs much better on a 15 tooth pinion and gives around 2200 rpm headspeed.

He who dies with the most toys is the winner!

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10-22-2005 10:05 AM  12 years agoPost 7
pabloss

rrNovice

Capri island - Italy

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Now I'm flying with a 17 tooth, twist .37 and jazz 40-6-18 kokam 3200 3s. With this configuration I have 2400 rpm on rotor at 90%, but every times i flip or roll to fly inverted the motor goes down too much.
So I like to have more power, but without lose the rpm, so I think to use 4 cell... maybe the only way right is to change the motor... Wich motor you think is good to fly with 4 cell??
Thanks to all

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10-22-2005 11:34 AM  12 years agoPost 8
Laurens

rrKey Veteran

Oegstgeest, NL

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Twist 33.

Edge rotorblades, Scorpion systems

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10-22-2005 04:29 PM  12 years agoPost 9
HugeOne

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Quebec, Canada

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Hacker C40-9L

Raptor e620 w/V-bar, Tango 45-06, Phoenix 85HV, TrueRC 12S1P 4000mAh

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10-22-2005 04:30 PM  12 years agoPost 10
Laurens

rrKey Veteran

Oegstgeest, NL

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Why hacker above kontronik Hugo?

Edge rotorblades, Scorpion systems

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10-22-2005 04:49 PM  12 years agoPost 11
HugeOne

rrKey Veteran

Quebec, Canada

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Bigger motor = cooler magnet.

From BTS formula: Io * V / weight = magnet heat.

Hacker: 1.7A*14.8V/187g = 0.134 W/g

Twist: 1.52*14.8V/150g = 0,150 W/g

Neu ORK 1905 1Y: 1.1*14.8V/180g = 0,090 W/g

The Neu seem to be a super efficient motor, with a big 8 poles rotor it can absorb lots of heat, it also have an internal cooling fan which make the motor very atteresting. You need to run it on 22T to achieve a HS slightly under 2400.

>Those are calculation only, reality could be different.

Raptor e620 w/V-bar, Tango 45-06, Phoenix 85HV, TrueRC 12S1P 4000mAh

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10-22-2005 09:15 PM  12 years agoPost 12
Laurens

rrKey Veteran

Oegstgeest, NL

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Your making me doubt again Hugo

Edge rotorblades, Scorpion systems

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10-22-2005 09:27 PM  12 years agoPost 13
HugeOne

rrKey Veteran

Quebec, Canada

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The twist is not a bad motor, if you have a good price for it then take it, anyway if ever it broke, the manufacturer is not too far from you.

It depend how conservative you are, the Twist/C40 are proven setup, the Neu is "something to experiment"

Raptor e620 w/V-bar, Tango 45-06, Phoenix 85HV, TrueRC 12S1P 4000mAh

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