Hi Guys, I'm going to lower a 90' Heights aluminum fold over tower with my car tomorrow evening. I've done this before without destroying the tower so hopefully I can have another successful lowering
Hi Dick, I'd use a falling derrick to do it that way if I were you. It can be as easy as a couple long 2x4's bolted together at the top to make an "A". Your cable will go right over the crotch of the
I'll second this. I just lowered my 50 foot aluminum Glen Martin tower using a 16 foot falling derrick. Mine is made of lumber, but you could also get a 20 foot waterpipe. The physics are much more i
This is a very dangerous way to lower your tower. As the tower becomes horizontal, so does your pull rope creating a lot of force. You need a higher support for your pull rope or use a tow truck. As
Dick, Please don't do this until you can get some onsite help. You're looking for trouble! As that tower gets near horizontal, the compression/buckling load from the cable will be LARGE, easily enoug
A friend of mine did this with a small (30') tower on field day. When the tower got down low it pulled the Jeep that it was attached to and slid the wheels. The tower swung out off center and crashed
In my early days of experimenting with irrigation pipe verticals I encountered this problem, but it just wrecked some old tubing. Glad I didn't learn this on a tower. You really want to side guy the
As I am sure you know, the forces grow quite high on the pull point as included angle of the strap approaches 0 degrees. Numbers for you to think about are: If the included angle is 60 degrees, the f
The coefficient of static friction for rubber tires against wet asphalt can be as low as .25 Depending on what the jeep was on (grass?) the horizontal resistance it would provide at the key point in
eice fori... interesting Video of the fellow on the fold up ladder on the falling derrick.. is not field day fun ? I have two 100' towers both with 50' of rohn 25 2 90 deg . and use it as the falling
I shouldn't really call it a falling derrick, I suppose. What I use is just a prop to keep the cable high enough to give lift when the tower is low. Our FD tower actually starts below horizontal, sin
Since this is a Heights Tower you need the Screw operated hinged base. The two Heights towers had this at the base and everything cranked over OK. Heights used to advertise two guys standing on the t
I did it without the falling derrick, as I did not have room for one. My solution was power tools. You can see the pictures at www.kk0sd.net It is the first link. 73, Joe kk0sd --Original Message-- F
Hi Dick, looks like you have had lots of very good suggestions. I too would very strongly advise against trying to use any passenger vehicle for your application. I have three 70' universal towers wi
That's fine if it works for you. I think what is underappreciated about the falling derrick is that you can have multiple ropes going from the falling derrick to different heights on the tower. This
OK...I have to ask. Are you taking about a fold over, or a hinged base? They are quite different. I The question was about a fold over, not a hinged base so I doubt a falling derrick would work well
Author: Joseph or Ruth Patrick <hdmc38@bellsouth.net>
Date: Sat, 4 Feb 2012 17:58:19 -0800 (PST)
Hello Gedas This is the best set up I have seen so far from the TT reflector. Great Design, cost effective, and appears to be VERY SAFE. Always The #1 issue in these situations. Congratulations you