Hi everyone,

I would like this to be a no questions asked but all i want to know is what sort of motor with what sort of propeller i should use to generate lift so i can lift a small mass.

Would this motor and this propeller be sufficient?
http://www.rapidonline.com/producti...r+for+2mm+shaft&moduleno=78914&catref=06-6024

http://www.rapidonline.com/producti...r4=3V,+8000rpm+Miniature+motor&moduleno=61542

Also, how much extra voltage can a motor take before it gives up?
Thanks

 

The motor you selected is 46 grams. the propeller is just over 3.5 inches across.

If you are very lucky that will lift itself of the ground, but won't have much left for any other lifting. The motor looks like it could handle another inch or two of propeller length.

and going over the highest spec'd voltage (6V) would not be something you want to do.

 

Un loaded, the motor would probably self distruct from high RPM with drastic voltage increase before max current is reached; something like running an efficient series motor with no load. Looks like a low pitch prop, so may need more RPM, I'd increase V untill max current is reached.

 

What about:
http://www.rapidonline.com/producti...100rpm+DC+Motor&moduleno=61539&catref=37-0140

and

http://www.rapidonline.com/producti...ible+propellers&moduleno=34725&catref=37-2206

 

That cuts your weight by 60% and only shaves 20% off the torque.

If you have the choice, try both sizes of propellers, the larger one might be to much for the smaller motor.

Have you considered the RPM vs the structural integrity of the plastic blades? 13,000 RPM is MUCHO centrifugal force on the tips

1mm and smaller drill bits spin that fast or faster, but propellers? I haven't looked it up yet, but I'm guessing that is too much RPM for those blades. If one blade broke free it could hurt someone severely

something lower than 6 or 7000 RPM would be better; and the bigger blade might need more torque than the small motor makes, but current measurements would be required to know for sure.

 

Then it hurts someone, theres no going foward if we dont take risks!
Thanks for the info so far

 

right idea, wrong rotation. >>> Air Digs -- Water Slaps.

Your motor specifies clock rot. looking at shaft.

Propeller shown is for counter-clock rot .


the pitch of the blades on a prop. is designed to pull the craft thru the air

 

can you use a a motor with reverse polarity because i do that all the time with no problems

And what about these propellers XD
http://www.rapidonline.com/producti...ier4=Propellers&moduleno=66047&catref=06-0626

 

can you use a a motor with reverse polarity because i do that all the time with no problems

I think you answered your own question. So do it already and tell us how it works

 

Props for RC planes are made to take extremely high rpms but remember that all propellers are designed for different purposes. Those for planes were designed to pull the plane through the air, they don't work by creating rearwards thrust. Helicopter blades work more as a revolving wing in that they provide lift due to the faster air speed over the top of the blade as opposed to the bottom. It's all a matter of experimentation to see what works best.

If you want to see props take a look at http://www.towerhobbies.com