---

From: Ernest Christley <echristley@nc.rr.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Sat, May 21, 2011 9:12:13 PM
Subject: [FlyRotary] Re: Blower experiment: FAIL

On 05/21/2011 01:04 PM, H & J Johnson wrote:
> I've built several fans that look like this, however to do so via milling from billet would be fairly expensive.  In the past theones I've built have always been a steel construction from cnc cut parts and then welded together.
For billet, you'd need a 12"x12" blank, 3" thick.  McMaster-Carr is asking $378.67 for  6061-T651 of that size.

OUCH!!

That ain't gonna work.

But how about this?  Cast a thick cylinder, and then drill 1" holes from the sides towards the center.  Casting and drilling should be a breeze.  It would require a mill and a large indexer to get an accurate spacing, though.

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:  http://mail.lancaironline.net:81/lists/flyrotary/List.html