|> |> So I think my problem will be holding the rotor steady when it cannot |> come |> |> into contact with the pipe wall while rotating. |> |>
|> | Maybe shaping the rotor so that a layer of fluid keeps the rotor from |> | touching the sides, like the heads on a hard drive? |>
|> Something like that might work. |>
|> -- |> |WARNING: Due to extreme spam, googlegroups.com is blocked. Due to |> ignorance | |> | by the abuse department, bellsouth.net is blocked. If you post |> to | |> | Usenet from these places, find another Usenet provider ASAP. |> | |> | Phil Howard KA9WGN (email for humans: first name in lower case at |> ipal.net) | | --------------- | Why not a simple frame to hold the axle centered. It need not be any more | than a few "spokes" which will have minimal interference with the flow.
If the frame is part of the whole mechanism, and not affixed to the inner wall of the pipe, maybe that can be done.
| Note that anything that depends on the fluid flow or layers will not keep | the rotor free from the pipe on starting (unless you repeal the law of | gravity) so after a few starts, bits of the impellor will be floating | downstream.
At startup it won't matter (much). At full speed I want it not contacting the wall. But even at stop when it is contacting the wall, it cannot be affixed to it. It has to be able to slide out and leave the wall intact.