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-   -   pic: Uber Stinktier... (http://www.chiefdelphi.com/forums/showthread.php?t=62728)

EricH 29-01-2008 17:41
Re: pic: Uber Stinktier...
 
Quote:
Originally Posted by Bob Steele (Post 688159)
Thanks for the heads up... it looks like our engineering team goofed.
Glad you caught it... ..

We will figure out something else then... the only long cylinder is the 2" 24" throw big boy...
I don't think we can afford the weight of that beast...
and we certainly don't need the power...
What about ganging a pair of smaller cylinders, rigged to throw simultaneously? As in, tying them together so that they will stay in a straight line, and firing both using the same tubing?

JHSmentor 29-01-2008 17:55
Re: pic: Uber Stinktier...
 
Quote:
Originally Posted by jgannon (Post 688131)
I hate to be the bearer of bad news, but there aren't any legal 1.5" bore cylinders with a stroke greater than 11". The only legal cylinders are the ones available from this page:
http://www.bimba.com/FirstFree.aspx
My understanding was that these are the only sizes that you can order this year. But, any Parker or Bimba cylinder is actually legal regardless of size. Am I wrong on this one? If so, then we need to re-evaluate our design as well.

EricH 29-01-2008 18:11
Re: pic: Uber Stinktier...
 
Quote:
Originally Posted by JHSmentor (Post 688177)
My understanding was that these are the only sizes that you can order this year. But, any Parker or Bimba cylinder is actually legal regardless of size. Am I wrong on this one? If so, then we need to re-evaluate our design as well.
Re-read the pneumatics rules, and read the Q&A. They are only legal if they are an exact match to a cylinder on the current order form (or as close as possible--there is still an issue needing clarifying about part numbers having to be the same).

Bob Steele 29-01-2008 20:57
Re: pic: Uber Stinktier...
 
We have already changed our design to use an 11" cylinder and it works fine.
It was a small change now but would have been tougher later.
Thank you guys for giving us a heads up...

Easy redesign now because we are still to cut these parts...

THE SKUNKS THANK YOU!~!!!!!

The Chief Delphi family is nice to be in...


For anyone's information ... the ONLY cylinders you may use are cylinders identical to those in the Pneumatic manual...

Madison 30-01-2008 14:15
Re: pic: Uber Stinktier...
 
Quote:
Originally Posted by Bob Steele (Post 687534)
We do have a way to roll tubing but we won't be using rolled tubing.
We made up layups to make the curved components from either carbon fiber or fiberglass... looking at the merits and weights of each right now.

Madison, we can roll tubing but it takes soft aluminum... it would probably have to be heat treated...we have a mock up in 3/4 X 1/8 wall that we are testing... let me know if we can help...
Ah, I see. Our gripper base is designed to accept anything as large as 1x1" square tubing -- and to allow replacing it quickly when it gets mangled to Hell. :) We've got 1x1x1/16" on hand as well as some 3/4" round tubing. The square tubing is 6061; I'm not sure what allow the round tubing is. We bought it back in 2006 and found then that we couldn't accurately bend it in a way that suited our needs.

I'll PM you a screenshot of our claw so you can get a better idea of what we're going for.

=Martin=Taylor= 30-01-2008 15:32
Re: pic: Uber Stinktier...
 
Quote:
Originally Posted by M. Krass (Post 688843)
Ah, I see. Our gripper base is designed to accept anything as large as 1x1" square tubing -- and to allow replacing it quickly when it gets mangled to Hell. :) We've got 1x1x1/16" on hand as well as some 3/4" round tubing. The square tubing is 6061; I'm not sure what allow the round tubing is. We bought it back in 2006 and found then that we couldn't accurately bend it in a way that suited our needs.

I'll PM you a screenshot of our claw so you can get a better idea of what we're going for.
Our team built its own pipe bender to bend 3/4" 1/16" wall tubing. It took about three days to build and was fairly cheap (considering it was built from scrap). We were able to bend a 27" diameter ring with no kinking or deformation.

If you are interested, PM me and I'll explain how it was done.

Before we did it ourselves, we recieved an estimate from a pipe bending company that wanted to charge us $2000 (including discount :ahh: ) with a lead time of 20 days!

JHSmentor 30-01-2008 18:22
Re: pic: Uber Stinktier...
 
Quote:
Originally Posted by EricH (Post 688191)
Re-read the pneumatics rules, and read the Q&A. They are only legal if they are an exact match to a cylinder on the current order form (or as close as possible--there is still an issue needing clarifying about part numbers having to be the same).
Yup - you are correct. Although it is somewhat contidictory to the rule. We have a Parker cylinder but it's obviously not the same dimensions and will definitely NOT be the same part number. they appear to be stearing all use of pnuematics to Bimba parts. in any case, we need to do some redesign to make it work - bummer.


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