Hi Louis!

This method you describe is better, and it is "real-life", not theory.
But how can you measure the static thrust ? Do you have to buy the motor first and mount it somehow, to measure ? Or you rely on the specifications ?
From what I see, it is rare to find the static thrust on a website, and if they do mention it, it is only for the slow-fly motors, and they do not mention the prop with which the thrust was achieved.

Originally Posted by dtrip

Hi Louis!

This method you describe is better, and it is "real-life", not theory.
But how can you measure the static thrust ? Do you have to buy the motor first and mount it somehow, to measure ? Or you rely on the specifications ?
From what I see, it is rare to find the static thrust on a website, and if they do mention it, it is only for the slow-fly motors, and they do not mention the prop with which the thrust was achieved.

Hi
The static thrust is related to the selected prop and rpm
Also the power (at prop shaft) is a function of rpm
The motor and ESC and battery has to provide the prop the correct rpm.
There are different calculators with a prop library to give all that
For example Scorpion Calc freeware
Louis

This was a HUGE HELP..I am a complete rookie and i wanna get into this hobby.i want to build one of my own from scrap. it appears as a good way to get into it would be by starting with kits. but for sum reason i feel like it wouldnt be as fun. so i am hear READING AWAY>>!! thanks guys

Originally Posted by Damenace

This was a HUGE HELP..I am a complete rookie and i wanna get into this hobby.i want to build one of my own from scrap. it appears as a good way to get into it would be by starting with kits. but for sum reason i feel like it wouldnt be as fun. so i am hear READING AWAY>>!! thanks guys

I suggest people start with an RTF, learn to fly, then go to designing and kits. This way you know you have the ability. Any problem you have with the kit or your own deigns will be easier to find when you take yourself out of the list of things that might not be working.

Originally Posted by Damenace

This was a HUGE HELP..I am a complete rookie and i wanna get into this hobby.i want to build one of my own from scrap. it appears as a good way to get into it would be by starting with kits. but for sum reason i feel like it wouldnt be as fun. so i am hear READING AWAY>>!! thanks guys

Why don't do both ?
There are lot's of free plans on the web, just google it. During your build, fly a cheap RTF to get a feeling of what you like and don't like.

Peter

Awesome Awesome Awesome thread!!
Thank you very much for all the information, Getting into this hobby is daunting enough, but with everybody taking the time to post this info for us "noobs", it makes it a whole lot easier!
Thank you

This helped me understand batteries soo much more

thanks its very nice article

is it possible fo give an example of good prop
engine
lipo
speed control
for a fomie 3D

This was a great article, I am very new to this and this helped a ton. Now as I am learning more and more about this hobby I am finding I am still getting lost. Can anyone help with some more lingo and things to consider on building or finishing planes. For example I am seeing this Power 46 BL outrunner motors for the recommended motors. I understand the BL outrunner motors, but what is the power 46 refering to, does 180 or 480 brushless refer to the power, model. Also what do I need to consider when I am upgrading a plane. I am looking at a super cub, I have the mini, and later on if I wanted more, say power what do I need to consider when upgrading? Battery, ESC, motor so on I know what they do and are, but don't fully understand what makes them work great together and not understanding how to choose the best fit for each other. Really I guess what I am asking is could someone look at a plane http://secure.hobbyzone.com/catalog/...f/HAN4450.html, and explain what all the specs are really saying, and the "what you will need" is saying. Still learning the translation of all this info. Im not planning on buying this plane, but am completly lost at the list. Sorry for the lengthy message just trying to learn, been reading a lot and still have questions. Thank you for your time.

Wow this is great thank you for posting this. It has cleared up alot.

yup, great post, really help beginners.

i need help selecting a brushless motor for this plane;
http://www.amazon.com/RC-Airplanes-7...4256484&sr=8-2
i would think something with at least 150 watts would be decent enough. its for a friend of mine. i will really appreciate input

thanks,
speedy

it sounds as though the only way to determine the the actual amp draw of a particular power system is to physically use all of those components and take measurements or find someone who already has; is this the case?

Originally Posted by RuthlessINXS

it sounds as though the only way to determine the the actual amp draw of a particular power system is to physically use all of those components and take measurements or find someone who already has; is this the case?

Hi
If you want precise values .. Yes
If you want 'in the ball park" predictions you have some free calculators
Scorpion Calc, Dualsky Calc, DriveCalc, Peakeff and a lot more
see the sticky thread here
http://www.rcgroups.com/forums/showthread.php?t=606703
If your motor is not in the library use the edit-custom feature
Louis