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« Reply #25 on: October 05, 2014, 11:36:50 AM »
sachin_k5
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Duplicate comment..
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« Reply #26 on: October 05, 2014, 12:59:44 PM »
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assume the motors to be 70grams each so 280 grams of motors, esc to be 35grams each so 140grams, controller to be 25grams, frame 420grams, battery 350grams, miscellaneous to be 100grams. Totals to about 1315grams.

You will need the motors to produce more than 2.5xthe frame weight so your motors need to produce more than 3kg thrust to be future proof, the 2216 800kv motors produce 1kg thrust with 11" props, collectively produce more than 4kg!!!!
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« Reply #27 on: October 06, 2014, 09:37:23 AM »
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Is this one is same as the hk frame http://www.rcbazaar.com/products/1465-hiller-x525-v3-glass-fiber-kit.aspx
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« Reply #28 on: October 06, 2014, 10:25:38 AM »
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Yes same but smaller.
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« Reply #29 on: October 11, 2014, 03:28:22 PM »
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can we mount 22-xx motors where its suggested as 28-xx motor in the quad frame??
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« Reply #30 on: October 11, 2014, 03:34:50 PM »
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Re:
Go to www.ecalc.ch and check rpm and max amp ratings for similar motors
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« Reply #31 on: October 11, 2014, 05:48:01 PM »
chintal
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Ecacl.ch is not ment for beginners
U cant mount 22 size motors on  28 size mounts
Unless specified that the mounts are compatible with other size motors
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« Reply #32 on: October 11, 2014, 06:33:14 PM »
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Its mentioned as motor bolt holes 14~30mm
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« Reply #33 on: October 12, 2014, 08:50:22 AM »
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I don't recommend ecalc, gives headache!!!
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« Reply #34 on: October 12, 2014, 09:09:47 AM »
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 I agree agree with sooraj
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« Reply #35 on: October 12, 2014, 09:12:27 AM »
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I think one may understand all the terms in ecalc after one or two builds, It seems a powerful tool though Thumbs Up
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« Reply #36 on: October 12, 2014, 08:28:10 PM »
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ok here is another simpler excel based one..

http://flitetest.com/articles/choosing-multicopter-motors
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« Reply #37 on: October 13, 2014, 12:48:19 PM »
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can we mount 22-xx motors where its suggested as 28-xx motor in the quad frame?? Its mentioned as motor bolt holes 14~30mm
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« Reply #38 on: October 14, 2014, 12:03:28 AM »
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So , new to Rc and Building a Quad , Huh? Huh?

(Just Like Me)

Refer this Blog By OscarLiang(Honk kong) Every thing a Beginner need to know about Quads and Lot more!!!

http://blog.oscarliang.net/build-a-quadcopter-beginners-tutorial-1/

This is where I Learned Many things, Try for Yourselves. This is the One stop spot For all you need to know.  Thumbs Up
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« Reply #39 on: October 15, 2014, 04:19:25 PM »
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Quote from: Dinesh.fly on October 04, 2014, 08:29:38 PM
that video is about setting up the KK board..I want to know  about the basics of a quad building n installing the electronics.thank u.

For understanding quad electronics , and PID settings, Refer this Blog...

http://blog.oscarliang.net/build-a-quadcopter-beginners-tutorial-1/
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« Reply #40 on: October 17, 2014, 10:56:08 PM »
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how the watts power of the motor is related with the thrust in kg??
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« Reply #41 on: October 18, 2014, 10:50:32 AM »
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for example if a motor's power is 300W means it can lift 300g?Huh?
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« Reply #42 on: October 18, 2014, 11:29:30 AM »
AnjanBabu
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Quote from: Dinesh.fly on October 18, 2014, 10:50:32 AM
for example if a motor's power is 300W means it can lift 300g?Huh?

Electrical power of a motor is calculated by multiplying the voltage input to the motor and current drawn by the motor.

For example, lets say, you're powering a motor with a 3S LiPo (~12v) and the motor draws about 15A to swing a certain prop,
the motor's power is 12V * 15A = 180W

I don't think there is any formula to directly derive power output of motor in kg-thrust from watts. So 300W is NOT equal to 300g.

Higher the wattage of motor, more thrust it is capable of producing.
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« Reply #43 on: October 18, 2014, 12:29:53 PM »
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Quote from: Dinesh.fly on October 17, 2014, 10:56:08 PM
how the watts power of the motor is related with the thrust in kg??
@dinesh.fly
Thumb rule for relating watts to thrust:
1. High kv/ small dia (5-6") prop 3-4gms per watt
2. Med kv/ med dia (7-9") prop 4-5gms per watt
3. Low kv/ larger dia (11-12") prop 7-9gms per watt

For a given dia, finer pitch will give better gms per watt static thrust than coarse pitch
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RC India  RC Models  Multirotors  Topic: Quad Electronics Suggestion wanted
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