I decided to take a break for a bite to eat and to see if anyone had an opportunity to offer some pointers. Needless to say I was very surprised to see all the comments and useful input. Thanks much to everyone for the encouragement and useful advice.
For the time being (because I am anxious to give it a try) the blade will be fixed, but I'll make it so that it can trip when I get my hands on some springs.
The propane tank has been devalved and empty for months. I revalve and recertify propane tanks at work all the time, so I'll share a little of the little bit I know. According to the scrap yard where we dispose of condemned tanks, they only need to be devalved for 24 hours before you can cut them. I prefer to wait a little longer, but that is just me being over cautious. Propane boils at - 42 degrees and expands at a rate of 270%. So whatever residual propane is left in the tank evaporates almost instantly.
I'm going to cut it with an angle grinder with a super thin cutting blade. I should say blades because I expect it to take a few.
When I laminate the pieces it will be to make the blade thicker not longer.
So what I have accomplished so far today, doesn't seem like much.
I welded the open ends closed and laid a piece of 1/4 inch flat stock on top and stitch welded it in place.
This is the blade mount in place with the start of the blade position holes. I have a couple more pictures of the 45 degree holes, but didn't think I needed to add those.
While walking by the rear end and seeing the still open tubes, I came up with an idea to add a counter balance on the back end of the push frame. My thought was that this would add in weight in the rear and make lifting the blade a little easier.
As usually, I tend to over think things and started to think that having weight on the rear of th push frame, might make the blade too light. I think given that the pivot point for the blade is so far back from the blade, that I would have to have a pretty substantial weight on it to really affect the weight of the blade. Any thoughts?
Well I better get back at it and thanks again for all your comments and input.
Edited by Watchdog, January 01, 2013 - 04:31 PM.