Subject: Rear strut bracket
From: Rotary Engine
Date: 7/7/2008, 4:37 PM
To: AAA Put this in the To box


Paul, two photos of the [Zenith 801] lower strut bracket.  If the  gear leg channel is
less than 3.25 " wide, I will  have to  "adjust" these to provide  enough
room for the rod end which is one inch wide.  They weigh in at 1lb  12 oz
per pair.   They look nice though.  I had the pattern burned with a  cnc
plasma.       Jerry


Are they 4130? They should be. How thick? Usually when you bend 4130  90 degrees you should
put some scrap sheet metal in the brake so the right angle has a  radius.

3T is recommended. In other words if the material is .049 thick the  inner radius should be .150 or more.

These parts are conservatively designed as weight is not much of an
issue when you have small brackets.
-- 
Paul Lamar ...No rotor no motor.


Your drawing called for .090 4130 so that is what they are.  I agree
the bottom 90º bend could use a more generous radius. I think I will
run a fillet down the inside of the bend as insurance.   jerry


Good idea. Do the outside where the cracks are too.
-- 
Paul Lamar ...No rotor no motor.

The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Youtube key word UTUBPLEASE
Copyright 1998-2008 All world wide rights reserved.