it depends on the propeller or ducted fan you use and the battery and the esc you need to get at least 500 grams of thrust from the system. if you can find out how many grams of thrust per rpm your propeller gives then you can find how many rpms you need to get at least 500 grams then divide it by the voltage of your battery and then you will have the kv rating of motor you need if you are using brushless and make sure your esc gives off the correct number of amps for the motor. for 500 grams of thrust you will need around 11.1 volts at 35 amps or two 11.1 volt esc's at 18 amps

Current and number of turns determines magnetic field strength, coil core material determines flux strength. The question starts with how big is the electromagnet to be.

## Comments

7 years ago

hey guys wat should b the least rpm of motor if i want to make 500g weight flying plane?????//

Answer 6 years ago

i also just did a little bit of research and you will get about 650 grams of thrust off of 38000 rpms at 11.1 volts and 30 amps

Answer 6 years ago

it depends on the propeller or ducted fan you use and the battery and the esc you need to get at least 500 grams of thrust from the system. if you can find out how many grams of thrust per rpm your propeller gives then you can find how many rpms you need to get at least 500 grams then divide it by the voltage of your battery and then you will have the kv rating of motor you need if you are using brushless and make sure your esc gives off the correct number of amps for the motor. for 500 grams of thrust you will need around 11.1 volts at 35 amps or two 11.1 volt esc's at 18 amps

7 years ago

16 RPM

How is your 25 Volt 15 cm long magnet project progressing ?????//

8 years ago

Current and number of turns determines magnetic field strength, coil core material determines flux strength. The question starts with how big is the electromagnet to be.

Answer 8 years ago

+1

You could get 25+ volts using 17 C cell 4 Amp batteries in series,

or two 12 Volt 200 Amp car batteries in series

Steve points out the current not voltage makes electromagnets !

Answer 8 years ago

battery is not a problem,,,,,,,,i want to know how much turns and layer of wire is required?

Answer 8 years ago

Practice here page six.

Understand here.

Now select

Now remember whatever armature you can do.

Professional Guinness competitor will out do you !!

Answer 8 years ago

Try a big old transformer. The iron in them should be ideal.

Answer 8 years ago

hey can you also answer does increasing no. of layer increase magnetic field and upto what extent????

Answer 8 years ago

Up to the point the magnetic core saturates with flux.

Answer 8 years ago

Yes it does.

You begin to loose some of the magnetic field to fringing when the layers

stack diameter starts to approach the same dimension as the coil length.

Answer 8 years ago

wats dis copper gauge 00 ...........(actually wat diameter motor wire would i ask shopkeeper??)

Answer 8 years ago

zero zero wire gauge magnet wire is o.365" in diameter and is good for conducting up to 280 amperes of current.

Answer 8 years ago

Get a high temperature insulation on it too

Answer 8 years ago

the electromagnet i want to make can b as big as it can be ,size does't matter..........how much wire will be required to make best????????

Answer 8 years ago

Not answerable !!!!!!

An infinite diameter coil with infinite current in infinite turns is "best".

Answer 8 years ago

the core of the magnet can be upto15cm length......it has to b strong in its 25volt categoty...............