Christine3491
25-09-2009, 12:01
Our team is new to FTC and trying to build the low cost playing field following the diagrams on the FIRST website.
http://www.usfirst.org/roboticsprograms/ftc/content.aspx?id=6654
I can't figure out how it's is suppose to be 12' (144").
There are 3 long pipes that are 43.5 inches. The T-connectors from our local hardware store are 2.75" total (with .75" overlap of pipe on each connection), so the additional length is actually 1.25" per T-connector. There are two 1.75" pieces at the ends that fit into 90d connectors. The 90d connectors don't add length to the inside of the playing field.
Here are the numbers.
3 x 43.5 = 130.5
4 x 1.25 = 5
2 x 1.75 = 3.5
The total is 139" which is much shorter than the 1" variance on 144".
Even if we add an extra T-connector to the center panel for the side reinforcement, the total is only 140.25".
How do we create a 12' playing field?
Should we be lengthening the small pieces (two 1.75") to get the correct length?
Are the T-connectors we're using shorter than ones available in the US?
Is it the inside of the playing field that should be 144"?
Thanks.
http://www.usfirst.org/roboticsprograms/ftc/content.aspx?id=6654
I can't figure out how it's is suppose to be 12' (144").
There are 3 long pipes that are 43.5 inches. The T-connectors from our local hardware store are 2.75" total (with .75" overlap of pipe on each connection), so the additional length is actually 1.25" per T-connector. There are two 1.75" pieces at the ends that fit into 90d connectors. The 90d connectors don't add length to the inside of the playing field.
Here are the numbers.
3 x 43.5 = 130.5
4 x 1.25 = 5
2 x 1.75 = 3.5
The total is 139" which is much shorter than the 1" variance on 144".
Even if we add an extra T-connector to the center panel for the side reinforcement, the total is only 140.25".
How do we create a 12' playing field?
Should we be lengthening the small pieces (two 1.75") to get the correct length?
Are the T-connectors we're using shorter than ones available in the US?
Is it the inside of the playing field that should be 144"?
Thanks.