I have been trying to find out what a 300, 400,450,500 size electric motor is. What do the numbers imply and how does one know the wattage of the motor.
How large is a 250 size plane or a 300 size plane.
Any explanation/ link is welcome
regards
Avijit

A quick search : http://www.rc-airplane-world.com/electric-motor-numbers.html

It is the length.

The Bible, I guess:

http://www.mabuchi-motor.co.jp/en_US/product/p_0300.html

The gist, quoted from the link in Reply #1.

Very useful info

As an engineer, when we select motors, what specifies is Torque & RPM, or turning it around, Power (Watts) and RPM (KV being the determinant for DC motors.) Resistance is a useful yardstick in comparing two apparently identical motors, giving an indication of heat build-up at a specific current.

For the modeller, Thrust is also important which is related to the prop used on a particular motor. Current drawn is important in selection of battery & ESC, and determining heating.

I have only entered Electric models a few months ago, and would stand corrected if wrong, as I may well be

Hi All,
Please can I have the link for the most competive seller for ;Himax HC3516-1130 motor _ and a Multiplex or similar MULTIcont BL-55 ESC Speed controller.

I need power system for two planes;
D A a scratchbuilt Depron foamy around 3 pounds//1.25KG
and
MPX ACROMASTER  approx 1.5 Kg plane

If possible want to stick with 3 cell lipos... It seems all these motors are only suitable for a 4 cell set up. My hanger is all geared up for 3 cells but if I have to, I guess I will have to invest in 4 cell packs...!! 

Even though I have been in RC for quite some time, my knowledge on motors and ESC is quite limited so any suggestions and help from the veterans will be welcome.

I have used this NTM Hobbyking motor for my FORMOSA 2 a 800 gram model and it is a Bazooka..

Need a motor like this not too expensive and propels the plane fast enough.... 

Suggestions please

Thanks

Model: NTM Prop Drive 35-36B 1400
Kv: 1400rpm/v            Turns: 7      Max current: 53.94A Max Power: 495W @ 12v (3S) /      Shaft: 4mm    Weight: 117g     ESC: 60A
Cell count: 3s~4s Lipoly    Bolt holes: 18.9mm & 25mm
Bolt thread: M3   PRODUCT ID: NTM3536B-1400

Deepak, a 3536-1400 should be adequate for this at 3S. If you still feel it's short, go for a 3542-1250 KV - I used that in my 1.8 Kg Spadstick, and it would go vertical.

http://www.rcindia.org/electric-planes/spadstick-electric-(full-size)/

Thanks Sanj did you get it from Hobby King ? Please can you upload a link where you bought the motor from.
Thanks
Deepak

Just use the search feature in HK. Its in Turnigy and NTM