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Bangood Extra 330 power setups

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bert baker09/08/2019 10:04:29
1577 forum posts
324 photos

Good morning all,,

My son has built a Extra 330 from a kit he purchased from Bangood,1 meter wing span

the recommended motor is 900-1200kv,

he fitted a 1000 Kv and 30amp speed controller and a 3s 2200,

He test flew it but was low on power, and says close to tip stall

Has any one built or flown one

Does anyone know what power setups he should be using

Edited By bert baker on 09/08/2019 10:13:37

Alan Gorham_09/08/2019 10:25:53
1232 forum posts
138 photos

There's not much detail in the numbers you have provided to enable anyone to advise.

What prop size is fitted?

What is the current draw at full throttle?

What is the maximum rated current of the motor you have fitted?

What is the AUW of the model?

Bob Cotsford09/08/2019 13:08:03
8382 forum posts
463 photos

My similar sized Sukhoi from Hobbyking has a 3548 900kv iirc motor and 60A esc, I can't remember what size prop but the log tells me it pulled around 500W on a 3S 3000 pack.

Edited By Bob Cotsford on 09/08/2019 13:08:59

bert baker09/08/2019 13:38:21
1577 forum posts
324 photos

Ok spoke to my lad

10/7 electric prop

22amp at full power

21 amp max on motor booklet

weigjt unknown at moment

Alan Gorham_09/08/2019 14:19:36
1232 forum posts
138 photos

So if it weighs any more than 2lb 6oz it will have less than 100W/lb power loading and won't fly like an Extra.

You are already at (past actually) the motors max current rating so you can't fit a bigger prop to increase current draw and hence power.

You could try going to 4s and propping down to keep your full throttle current around 20A, or stay on 3s and fit a bigger motor and ESC, but to make a good choice of motor you need to know the AUW.

Bob Cotsford09/08/2019 17:07:54
8382 forum posts
463 photos

The advertised flying weight is 800gm and your setup is giving around 230W so if you have achieved the optimistic sound 2lb rtf weight your 110-120w/lb should give a reasonable performance.

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