Discussion in 'Everything Scratchbuild (Questions & Chit-Chat)' started by rchawk, Jun 21, 2010.
Does anyone know how to measure a propeller
tip to tip to measure the the length.
Read the small numbers on the prop to see the the bite ^^
The first number is the diameter of the prop..the second number the pitch,this is a lab calculated value and is hard to explain,the prop measurement are normally printed on the front of a prop.
someone should invent a "tri square" calibrated for props, that when one arm was laid on the main driving face of a prop (and the prop would need to be screwed onto the device too at its mounting point ), would indicate the bite
Measure a propeller
Props are pre-measured and the values are on the front side.
First number is the diameter in inches
Second number is the pitch in inches
For example 6x4 APC
One note regarding the pitch: at 100% efficiency, for the 6x4 example, the prop will pull the airplane forward 4 inches every rotation.
Thank You Everyone,
I appreciate all the replys
So correct me if I am wrong , for example a 5x5 propeller v/s a 6x4
the 5x5 would make the ( same plane) plane go faster than the 6x4 , but the 6x4 would have more torque and be a better choice for a larger heavier plane
Simply put larger props have more static thrust (= better acceleration) and smaller ones are for higher speeds. If you already have a motor, you have to pick the prop that suits it. If you can it's better to first pick the prop based on your needs (plane size, speed etc.) and then find a suitable motor. There are some rules of thumb for selecting the right power (wattage) and thrust range for each plane but I don't know them.
lol that would work too, reading the writing on the prop