Hi, am a new member to the group.
I'm making an RC plane own-my-own, so my total payload is around 1.9Kg and my motor is 1440kV and weighs around 78gm and produces thrust around 1.2Kg. And the ESC is around 30 amps. I measured all this stuff on eCalc. I need help to decide the battery requirement, as currently I've a sp4mm3r 450mAh 75C battery. How do I decide which battery is suitable for me?

:::MORE DETAILS:::
Total Plane Weight= 1.9Kg
Empty weight= ~500gm
Wing Span= 110cm
MAC= 11.5cm (Mean Avg. Chord)
AoA=5 degrees (Angle of Attack)
Thrust:Weight ratio= 0.628

::MOTOR DETAILS::  (I'm kinda confused with this 1 too)
Hacker A30-28S V4
Thrust= 1.2Kg
RPM/V= 1440kV
Outrunner
(I can change this motor too, depending upon the battery. I want to keep the weight of the electronics to a minimum tho)
I did some 50-70 iterations on eCalc to find this motor. But if U could suggest me a better one, that's good.

Props= 9x4.5 in
~Noob Here~
ALSO plz help me with the formula (if there's any) for calculating battery requirement or motor's kV requirement.

why u used disposable (fake) mail to create id on rcindia?

Was having some issues with the main account.
Anyway, any answer for the query plzzzzz.

Check the KV you have written
https://www.hacker-motor-shop.com/Brushless-Motors/Hacker-Outrunner/Hacker-A30/A30-14pole/A30-28-S-V4.htm?shop=hacker_e&SessionId=&a=article&ProdNr=15716110&p=6514
As per this, you would need typically a 1045 SF prop and get 1 kg thrust. You would need a 3S LiPo minimum 2200 mAh 25 C. A 30-40 A ESC

Sent from my Moto G (4) using Tapatalk

BTW Hacker are premium motors, among the best you can buy

Sent from my Moto G (4) using Tapatalk

At ~ 73 EU not surprising 😉

Sent from my Moto G (4) using Tapatalk

if you know disposable mail then you also know that gmail doesn't need number for registrations.
I can easily easily access your account within few seconds. So, creating new account with disposable is not a solution.
Create new gmail id then make account on rcindia.
can u tell me what is issue with your old account?

 

Sanjayrai55’s reply gives you a good starting point.
For more info, youhave to providemore data.


Hope this helps...
Regards

::Full Details::
Here is my complete Analysis of the components that I'm gonna buy.


Sorry, it was actually Hacker A30-22S-V4 (14 poles)
Here's the link for more details:
https://www.hacker-motor-shop.com/Brushless-Motors/Hacker-Outrunner/Hacker-A30/A30-14pole/A30-22-S-V4.htm?shop=hacker_e&SessionId=&a=article&ProdNr=15716111&p=6514


Yes, this is the first time I'm making an RC Plane, hence I'm too afraid to fail.
And Yes, my total weight (incl. drive) is 1.9Kg
For more details on motor, plz checkout the below image. I did some research and analysis on the motor.
As far as I know (from various rcforums), my drive current should be enough to fly the plane, what I mean is that:
If i have a 450mAh battery with discharge rate of 75C then:
0.45*75 = 33.75A which should be >= drive-current of the motor@ full throttle. Or (150% of drive-current of the motor@ optimum throttle.)
(Also by ESC around 30Amps, I meant 30 or 40A. As I've both ESC's)

PLZZZZZZ Do review my understanding of this part.
And Thanks Everybody for helping me.
It means a lot.

Sorry, will do for sure..  
Seems like I'm unable to recover my password and the account is locked for trying too many times. 

Two points to consider
1. C ratings on lipos are often exaggerated. I rarely draw over 10C from a 20C rated lipo.
2. If your 450mah lipo is really high quality, it may be able to power a 400w motor on full load.

And in the process, die in 30 seconds!

If that’s hard to believe, try a test on the ground, with a wattmeter connected to see if you’re drawing 30-35 amps.

I often recommend trying out a bicycle, before trying out a Harley 
But to each his own...

If you can't recover password and account then you make new accounts instead of using disposable fake mails.
After few months, if you want to login on rcindia then you again forgot password and email and this time, both email as well as password.
Make id with mobile number. If you recover password with mobile number.
It is better for you to use genuine id on rcindia. So, make genuine id on rcindia then repost topic. Users of this forum will help you.
Using fake id on simple website is like exploiting website.