|
|
I was getting worry, Ernest about the "level" to which you were descending to produce components - I figured next you would start building an electric ore furnance to smart smelting your own aluminum for you casting efforts {:>)
Personally I think you are better off machining it out of know quality plate aluminum - as you have undoubted found out consistency can be difficult to achieve with large castings of aluminum - and therefore strength and hidden flaws can be of concern - particularly when used as a motor mount.
We all want you to stop goofing off and fire up that engine - its been - what three years or more since I flew up and blessed your engine assembly {:>) - and still no engine start? Get busy, Ernest and stopped getting diverted by undoubtedly interesting - but time consuming side projects. There's way too many projects and only so much time (and money) to build and airplane{:>)
Ed
Edward L. Anderson
Anderson Electronic Enterprises LLC
305 Reefton Road
Weddington, NC 28104
http://www.andersonee.com
http://www.eicommander.com
--------------------------------------------------
From: "Ernest Christley" <echristley@att.net>
Sent: Tuesday, October 05, 2010 9:51 AM
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Permanent Magnet Alternators
Kelly Troyer wrote:
Todd and Ernest,
Anything to report on your Permanent Magnet Alternator installations ??...............
I spent last Saturday trying to cast an aluminum mount for my rotor. I'm really not happy with the sheet metal mount I built. I've been practicing casting, and I've made several parts, including a couple of crank angle sensor mounts (1/4" of aluminum makes for a really stiff mount).
It turns out that the difficulty of metal casting is proportional to the cube of the parts size. Right now, I have a chunk of aluminum the size of a one-gallon paint can stuck in my furnace. I ran out of fuel just as the last ingot was starting to melt, and after that disaster I discovered a small hole had formed in my crucible and was slowly filling the bottom of the furnace.
That's when I decided that I would just order a 12"x12"x2" 6061-T3 aluminum plate and machine it. I started down the path of a casting before I bought my 12" lathe, but the machining makes more sense anyway.
This is the last major part I need before moving on to an engine start, so the delay kinda sucks, but at least I have a new skill. I'm going to apply it to making tap handles for the kegs that we use at work during our Friday Beer Bash.
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html
|
|