Try a bathroom scale. Duh.
Re: Need a dingus thingamabob....
Started by DuckView, 07/15/2007 03:48AM
Posted 07/15/2007 03:48AM
Opening Post
Posted 07/15/2007 06:23AM
#1
If you can do with pulling...a fish scale should work well.
http://www.dickssportinggoods.com/product/index.jsp?productId=967920&cp=2291549&sr=1&origkw=fish+scale&parentPage=family&searchId=2291549
Bob
http://www.dickssportinggoods.com/product/index.jsp?productId=967920&cp=2291549&sr=1&origkw=fish+scale&parentPage=family&searchId=2291549
Bob
Fujinon 10x70 FMT-SX binocs
Tak FS-78 ƒ/8.1 - 630mm fl.
6" ƒ/6.5 homeground newt. - 981mm fl.
10" ƒ/4.85 homeground dob. - 1231mm fl.
Posted 07/17/2007 11:25AM
#3
Greg,
Once you figure out how to measure the force (I'm not sure why you chose 200 pounds) you then need to decide where to apply it. From one of your previous posts you seemed to indicate that the wind could topple the scope. Try to insure that one of the legs is downwind, that is pointing in the direction toward which the wind is blowing.
it seems that the greatest resistance to the wind is the scope itself, so that the moment of the force about the feet of the tripod is greatest there. So apply the force somewhere at the scope itself. Tie a band around the scope just above the mount head and apply the force by pulling in the direction that is opposite the "downwind" leg. (This is a worst case situation. Pulling in the same direction as the downwind leg should require more force to topple the rig.) Have someone standing by to catch the scope in case you pull too hard.
Another alternative to a scale is to rig up a pully on a stand or makeshift tripod so that the pulley is at the same height of the point of application of the force. Tie a line from the scope passing over the pulley and tie weights to the end of the line. Keep adding weights until the scope is about to topple. Training weights would be ideal. Or borrow some counterweights. You could rig up several pulleys to reduce the amount of weight required, but this technique is already approaching Rube Goldberg territory with just one.
Good luck with your project.
Dom Q.
Once you figure out how to measure the force (I'm not sure why you chose 200 pounds) you then need to decide where to apply it. From one of your previous posts you seemed to indicate that the wind could topple the scope. Try to insure that one of the legs is downwind, that is pointing in the direction toward which the wind is blowing.
it seems that the greatest resistance to the wind is the scope itself, so that the moment of the force about the feet of the tripod is greatest there. So apply the force somewhere at the scope itself. Tie a band around the scope just above the mount head and apply the force by pulling in the direction that is opposite the "downwind" leg. (This is a worst case situation. Pulling in the same direction as the downwind leg should require more force to topple the rig.) Have someone standing by to catch the scope in case you pull too hard.
Another alternative to a scale is to rig up a pully on a stand or makeshift tripod so that the pulley is at the same height of the point of application of the force. Tie a line from the scope passing over the pulley and tie weights to the end of the line. Keep adding weights until the scope is about to topple. Training weights would be ideal. Or borrow some counterweights. You could rig up several pulleys to reduce the amount of weight required, but this technique is already approaching Rube Goldberg territory with just one.
Good luck with your project.
Dom Q.
Funding Member
