Recent content by satchurated

The effect is called Helmoltz resonance

Check zortrax m200 printer. It has a resolution of 90 microns, the highest for fdm type, and with further upgrading/updating, will hit 50 microns. The price? 1600€

Ok thank you by now...i will try and then let you know

I'm referring to a fixed pitch propeller. I'm asking for knowledge not for a specifical need

I'm looking through some books a guideline or a rule of thumb for twisting a blade. I've read that is related to angle of attack and speed, but i cannot find something clear. For what I've understood, there is not a rule but every manufacturer decide which angle choose ( internal know how). Do...

One thing is power to thrust, which is different to speed as you talk. The force is not calculated as above, but in a way more complex because thrust needs to take into account the weight

If you're studying the dynamics of a multirotors, speed is not so important as you think

You mean thrust..

Polymers are cheap, but you will need a stamp and someone for the hot forming. Balsa is cheap and easy to handle, but weak and the torque of motors will twist the arms of your quad or hexa...in the market you can find arms of plastic or carbon fiber kits..is up to your pocket

So you are trying to build a efficiency curve, right?

Ansys fluent is top level application for cfd only. You will need a program to design your geometry. You can couple ansys with solidworks or catia. Those programs have cfd inside, the only thing that differences one from the other are the precision of calculation. If just want to study the...

Wrought and forged steel, has fiber inside, casting no. Forged is stronger due to presence of metal fiber...you decide to use one despite of the other depending on: -shape -dimensions -mechanical properties Crankshafts are forged, propellers are forged...pump casing is casted, valve body are...

The 0.2% yield is a usefull value in maritime industry because allows you to understand how much energy a hull ship or a platform leg can withstand without permanent damage

If you search on the web, there is a paper about a quadcopter and the momentum theory

Try ecalc, is not enough reliable because it analyze from an electrical/weight point of view with a database of some motors and propellers you can found in the market. Is a good point, not the bible...