http://www.rcuniverse.com/forum/m_10791006/tm.htm

I posted this in the electric forum and I am not receiving any help. maybe I can get some advice here.
Please!!!

Sep. and Oct. Fly RC has the articles on conversion.

I don't think anyone is going to follow threads to answer a question that has been asked once. Post what you need here so that folks don't have to go searching for your questions.

CGr.

Seems people don't help here as much as they used to, I'll try to figure it out. Thank you.

shd3920, I have never had a problem with people wanting to help. Some times so many suggestions that I don't know which one I want to use. Sorry you are not getting the answers that you are looking for. But stick with it.

Irish, I believe he would get more help if he simply posted his request here rather than have someone chase around links. It is much easier that way for folks to reply rather than get distracted or misdirected to somewhere else.

CGr.

Try this:

http://www.valuehobby.com/power-syst...or-1560kv.html

The question:
What would be the electric motor size equivalent to a Cox .020 Pee Wee engine?

So very sorry for getting an attitude, I appreciate any info I can get

Whitecrest responded to you with the following:

A 50-60 watt brushless is a pretty small motor.

Ok. Next question. What plane are you planning on putting this replacement for the Cox 20 Pee-Wee on? You can figure out what motor you need by working out the following:

Read through the following and work it out.

Once done, you will know what wattage you are working with and what motor and esc to buy. Always go to the higher level when figuring out what motor and esc to buy.. if it works out to 17 amp ESC, go to a 20 amp ESC. Match the motor to the esc. If it doesn't match up with what you picked out, move to a motor/esc combination that does, get the weight (should not be that much difference) and work it out again and get the right one.

You should be fine.

Here are some guidelines:

1. Power can be measured in watts. For example: 1 horsepower = 746 watts

2. You determine watts by multiplying ‘volts’ times ‘amps’. Example: 10 volts x 10 amps = 100 watts

Volts x Amps = Watts

Therefore,

Amps = Watts / Volts ( / = divided by ). Simple elementary math.


3. You can determine the power requirements of a model based on the ‘Input Watts Per Pound’ guidelines found below, using the flying weight of the model (with battery):

50-70 watts per pound; Minimum level of power for decent performance, good for lightly loaded slow flyer and park flyer models
70-90 watts per pound; Trainer and slow flying scale models
90-110 watts per pound; Sport aerobatic and fast flying scale models
110-130 watts per pound; Advanced aerobatic and high-speed models
130-150 watts per pound; Lightly loaded 3D models and ducted fans
150-200+ watts per pound; Unlimited performance 3D and aerobatic models

4. Determine the Input Watts Per Pound required to achieve the desired level of performance:

Example:

Model: E-flite Brio 10 ARF
Estimated Flying Weight w/Battery: 2.1 lbs
Desired Level of Performance: 150-200+ watts per pound; Unlimited performance 3D and aerobatics
2.1 lbs x 150 watts per pound = 315 Input Watts of total power (minimum) required to achieve the desired performance

5. Determine a suitable motor based on the model’s power requirements. In this case, you will need a motor/esc/battery combination for 30 amps continuous... 3 cell LiPo at 11.1 volts (nominal) is 315/11.1=28.xxx amps, round out to the higher 30 amps.

For the above, take the plane you want to convert to electric power, remove the engine, fuel tank, and battery pack.

Weigh the plane as it is, without the engine, tank, and battery pack. Include the receiver and servos you plan on using. If you are using the same ones, then weigh the plane with them installed.

On the internet, find a candidate motor/esc/battery and look up the weight of this combination and add it to the weight of the plane.

Do the math for the above post and figure out of the motor/esc/battery you found on the internet is a workable candidate for the desired type of flying you wish to do with that plane. If it all works out, then get it and install it. If not, find a different motor/esc/battery combination and work it out again until you find the right combination. This may take you all of about a half hour to do.

CGr.

Sterling Piper Cub Super Cruiser PA-12 35 1/2" wingspan.
plan on using the other components pictured too: Micro6 servos from All e RC (weight 6gr/.21 oz),
7.2v/270mAh NI-CD battery pack, Hitec feather single conversion ultra light receiver

I have a E-Flite Park 450 Brushless Outrunner Motor, 890Kv
E-Flite Park 400 Brushless Outrunner Electric Motor 920Kv
or a Nano Brushless Outrunner RC Motor 2024 KV1400

I would like to use one of the three I already have.

If you were to go down to the bottom of the header bar you will find a site called Wattflyer. If you go there and sign up then do a little searching there is a fellow there that does a bunch of the Sterling planes as E powered RC. It may take just a bit of effort on your part but I'm sure you can find him.
If you bothered to pull up the Fly RC web site you could read and down load the articles yourself and have this information on hand. Sometimes a little effort is a good thing.