What size and pitch of propeller? - propeller selection guide
I am designing a hovercraft and under the rules of the competition, I have to use a standard 1.5-3V DC motor. Having visited a hobby shop, I learned that there is much more than the selection of the propeller, as I thought. What is the size and the height of the propeller can handle the little machine? Or better yet, how do I find?
Saturday, January 23, 2010
Propeller Selection Guide What Size And Pitch Of Propeller?
4 comments:
Try www.eaa.org have many books in the aircraft.
If the propeller or propellers to move the hovercraft to the air under the skirt under pressure? They performed various tasks and different ideas.
If you can afford to buy different equipment can be as simple as trying to find the right support for experiments. Simply create a test in which the engine and propeller to mount the pressure can be measured (force perpendicular to the blade of the propeller), which holds the propeller. Try several and see which accessories are given more thrust.
To get started, is designed to offer some support in general for a certain speed. As the propeller rotates faster or slower than the speed, do not do so well. Speed in the air also affects performance, but if you build a hovercraft, then it should be no problem.
An engine alternately given for a particular system with no load and a given input voltage. Support for the additional strain and the engine will slow. Change the motor voltage also changes the engine SPEEd. The problem is the engine speed to match the speed of the propeller. Ultimately, the engine speed the design of the propeller is standing (and vice versa), this can be difficult to calculate.
The burden of air the propeller will also be affected by conditions on the hovercraft. If you use a model airplane propeller to pressure will hover be done differently in the use of a free position of the proposal. The reason for this is to float the return pressure of the region affects the flow through the propeller.
So, if you build in accordance with a turboprop engine and application, it is best just to experiment, to the right propeller. Reduce options that your accessories engine (s) found and what sizes are appropriate for the overall design.
Size of the engine size is irrelevant. Remember, the higher the pitch of rapid acceleration. The general tone with the fastest speed. For example, in installing a ski boat at a point 18 for the best proposal for an action, but if you want speed, I would go with # 14, in other words, if you go over the total lack of wind speed with a lower pitch. I would say that the "trial and error, prototype design. It is common practice in engineering. Entreaties to make you the person in the business of CR at the suggestion of a good middle of the road from the coast and from there adjustments.
Note that the size of the proposal and not the size is not the same.
This might help (not hydro-pneumatic support)
http://www.rbbi.com/folders/prop/propcal ...
Looks like a case for an experiment.
Try using a template that will you measure what force generated by each propeller can to try.
If you want to use batteries, you can also test how long do the batteries in each case.
Looks like a case for an experiment.
Try using a template that will you measure what force generated by each propeller can to try.
If you want to use batteries, you can also test how long do the batteries in each case.
Post a Comment