solid ellipsoid problem with revolution

[lorenzojin]

hello to all are a neophyte, wanting to build a solid in practice a head of a monocylindrical air-cooled, my problem that I can not get a solid ellipsoid, building the cooling fins, along the whole side surface of the solid.
I tried to draw the section and then through the revolution but in the end I have a solid with circular base, how can I do? :bekle::bekle:bekle:

 

[Tarkus]

hello to all are a neophyte, wanting to build a solid in practice a head of a monocylindrical air-cooled, my problem that I can not get a solid ellipsoid, building the cooling fins, along the whole side surface of the solid.
I tried to draw the section and then through the revolution but in the end I have a solid with circular base, how can I do? :bekle::bekle:bekle:

without making us better understand what you want to get is hard to give you answers.
However, if you already have the solid revolution, you can "cut" the wings with an ellipsoidal profile through an extrusion of subtraction. . .
If I put on your profile, with what version of inventor you work, I could also post some examples... .

 

[lorenzojin]

without making us better understand what you want to get is hard to give you answers.
However, if you already have the solid revolution, you can "cut" the wings with an ellipsoidal profile through an extrusion of subtraction. . .
If I put on your profile, with what version of inventor you work, I could also post some examples... .

hi actually I would like to build a 4-time engine head of ellipsoidal shape, the version of inventor is that 2012.
in practice I can only make a circular form but not oval or ellipsoidal as you could do?

 

[marcof]

hi actually would like to build a 4-time engine head of ellipsoidal shape

You've already said it, even, so you understand as before...

you just have to try to formulate a written thought that allows you to describe a three-dimensional object in a comprehensible way to those who do not have divinatory blindness or reading 3d images resident in the heads of others.

Alternatively a pencil sketch on scanned cheese paper and attached here could be your crumb ace. . .

 

[Tarkus]

You've already said it, even, so you understand as before...
Alternatively a pencil sketch on scanned cheese paper and attached here could be your crumb ace. . .

:hahahah:4441::36_1_11:

@lorenzojin:
In the meantime let us know if the blast chamber is cylindrical and the outer fins are ellipsoid, or even your cylinder (which will no longer be a cylinder),
You want to build it in elliptical section. .

 

[lorenzojin]

:hahahah:4441::36_1_11:

@lorenzojin:
In the meantime let us know if the blast chamber is cylindrical and the outer fins are ellipsoid, or even your cylinder (which will no longer be a cylinder),
You want to build it in elliptical section. .

then the overall shape is elliptical while obviously the cylinder inside is cylindrical the hemisphere combustion chamber. in practice the shape of the fins is elliptical the head is a project for a motion of epoch precisely motom

 

[lorenzojin]

http://imageshack.us/photo/my-images/830/latrp.jpg/

 

[lorenzojin]

 

[pompeo79]

comes from if you use the revolutionary inventor command (justly), revolutionizes your profile around a axis, creating, (always rightly) a revolutionary and symmetric solid respecting the axis of revolution.

now the helix is a symmetrical geometric shape compared to the vertical axis passing between its 2 axis?

No.

therefore it is advisable to create solid elittics with extrudes, sweep or loft.
then create the processing for the fins (which in any case was better to create in a separate processing for greater control).

 

[diegus]

comes from if you use the revolutionary inventor command (justly), revolutionizes your profile around a axis, creating, (always rightly) a revolutionary and symmetric solid respecting the axis of revolution.

now the helix is a symmetrical geometric shape compared to the vertical axis passing between its 2 axis?

No.

therefore it is advisable to create solid elittics with extrudes, sweep or loft.
then create the processing for the fins (which in any case was better to create in a separate processing for greater control).

I would say, for what I understand, that you could try with the sweep of the profile along the perimeter of the ellipse... .

 

[Tarkus]

I imagine that the blast chamber is cylindrical and the fins have an elliptical profile.
in this case:
ok the revolution up to a diameter=to the max size of the fins.
sketch with elliptical profile and extrusion of subtraction to cut over and give the desired shape to the whole....