Re: Talking propellors
Posted: Thu May 19, 2016 9:58 am
Javaprop
http://www.mh-aerotools.de/airfoils/javaprop.htm
but because of security issues you may have a problem with the copy box being greyed out... here's the solution.
http://forum.outerra.com/index.php?topic=2851.0
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First off on the design tab.. enter these values.
number of blades = 2
revs per min = 2750
Diameter = 1.778
Spinner Diameter = 0.15
Velocity = 57
Power = 75000
and press the design it button.
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on the airfoils tab change the airfoils to these..
MH126
MH114
MH116
MH116
these are just my preference of airfoils you can play around and pick from the selection if you so wish
Having done that go back to the design tab and re-press design it..
Don't do it the other way round, to miss a step as it doesn't produce the correct values.
------------------------------------------------------------------------------------
on the geometry tab you can have a look at your prop.
------------------------------------------------------------------------------------
on the mulit-analysis tab press analise
and have a good look at your initial prop....
it's not finshed by the way, not that you couldn't use it but we know something about our prop and thats the 18.74 degs pitch angle... and this prop doesn't have this it has a 20.9 degree pitch angle.
how do I know ?
------------------------------------------------------------------------------------
on the geometry tab you can have a look at your prop.
left hand side of the table find 0.75... then across to the pitch angle which is the 3rd collumn.... 20.9
or even easier look at Beta at 75%R on the design tab
http://www.mh-aerotools.de/airfoils/javaprop.htm
but because of security issues you may have a problem with the copy box being greyed out... here's the solution.
http://forum.outerra.com/index.php?topic=2851.0
===========================================================
First off on the design tab.. enter these values.
number of blades = 2
revs per min = 2750
Diameter = 1.778
Spinner Diameter = 0.15
Velocity = 57
Power = 75000
and press the design it button.
------------------------------------------------------------------------------------
on the airfoils tab change the airfoils to these..
MH126
MH114
MH116
MH116
these are just my preference of airfoils you can play around and pick from the selection if you so wish
Having done that go back to the design tab and re-press design it..
Don't do it the other way round, to miss a step as it doesn't produce the correct values.
------------------------------------------------------------------------------------
on the geometry tab you can have a look at your prop.
------------------------------------------------------------------------------------
on the mulit-analysis tab press analise
and have a good look at your initial prop....
it's not finshed by the way, not that you couldn't use it but we know something about our prop and thats the 18.74 degs pitch angle... and this prop doesn't have this it has a 20.9 degree pitch angle.
how do I know ?
------------------------------------------------------------------------------------
on the geometry tab you can have a look at your prop.
left hand side of the table find 0.75... then across to the pitch angle which is the 3rd collumn.... 20.9
or even easier look at Beta at 75%R on the design tab