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Home✈️Aircraft🚁Helicoptere-Electric General Discussion › GARTT 1220KV 2100w question
05-31-2020 07:56 PM  34 days ago
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rotorworksone

rrNewbie

Antalya

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GARTT 1220KV 2100w question
Hi everyone,

I have question about GARTT 1220KV 2100w brushless 550/600 series. I would like to use this motor on my heli but I am kind of confused. Info says 3 or 6s lipo supported however KV rate gonna be same over 3/6s or 1220KV given only for 6s? Otherwise 3s suppose to be half right? Here are the specs.

Input Voltage: 3-6s Lipolly
Max continuous current: 90A/150A
Max output power: 2000W/3000W
KV Value: 1220KV

Here is the motor link

https://tr.aliexpress.com/item/4000...17%237563%23521
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06-03-2020 02:52 AM  31 days ago
Rojoalfa

rrKey Veteran

Punta de Mata, Monagas-Venezuela

MyPosts All Forum Topic
rotorworksone GARTT 1220KV 2100w question
Hi everyone,

I have question about GARTT 1220KV 2100w brushless 550/600 series. I would like to use this motor on my heli but I am kind of confused. Info says 3 or 6s lipo supported however KV rate gonna be same over 3/6s or 1220KV given only for 6s? Otherwise 3s suppose to be half right?
/
/

Kv is independent of number of cells.

In your case, a motor with 1220 kv needs 6S to drive aprox 2900 rpm on a series 600 heli.

For low rpm, 3S could do aprox 1500 rpm. ( half!!!)

Remenber...

Max rpm = Factor x Kv x N x 3.7 / (gear ratio)

Where

Factor, 0.95
Max rpm, maximal rpm
Kv of motor
N, Number of cells of lipo pack.
Gear ratio = teeth spur / teeth pinion.

/
Saludos cordiales,
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