Landracing Forum

Tech Information => Technical Discussion => Topic started by: shanespector on April 02, 2009, 11:02:16 AM

Title: Gussets
Post by: shanespector on April 02, 2009, 11:02:16 AM

What is the reason for the Open Corner on the gussets? Thanks for any help.

Title: Re: Gussets
Post by: Glen on April 02, 2009, 11:11:56 AM

For draining and to keep salt from packing in he corner and starting rust.

Title: Re: Gussets
Post by: shanespector on April 02, 2009, 11:26:52 AM

Thats what i thought, just making sure. Thanks Glen.

Title: Re: Gussets
Post by: Loose Goose-Terry#1 on April 02, 2009, 03:16:37 PM

 :-D In addition to what Glenn said, it is much stronger because there isn't a localized stress point where cracks can occur.
Terry  :cheers:

Title: Re: Gussets
Post by: shanespector on April 02, 2009, 08:18:30 PM

Thanks Terry.That also makes much sense. :-D

Title: Re: Gussets
Post by: Dr Goggles on April 02, 2009, 10:23:05 PM

Quote from: shanespector on April 02, 2009, 11:02:16 AM

What is the reason for the Open Corner on the gussets? Thanks for any help.

I believe that due to the absence of a fulcrum point that a gussett with a radiused cut out is stronger. Can't remember the source of that info....might be my imagination, but I'm sure I read it somewhere.

Title: Re: Gussets
Post by: Rex Schimmer on April 03, 2009, 01:25:47 AM

I have a difficult time rationalizing the logic of the design of the type of gusset that the SCTA requires as it looks like it just wants to originate a tear in the tubing but it's their football so it's their game.

Rex

Title: Re: Gussets
Post by: floydjer on April 03, 2009, 09:53:28 AM

Quote from: Rex Schimmer on April 03, 2009, 01:25:47 AM

I have a difficult time rationalizing the logic of the design of the type of gusset that the SCTA requires as it looks like it just wants to originate a tear in the tubing but it's their football so it's their game.

Rex

Agree 100% on both points Rex. Also has about zero strength in compression load. J.B.

Title: Re: Gussets
Post by: Dynoroom on April 03, 2009, 11:21:25 AM

Quote from: Rex Schimmer on April 03, 2009, 01:25:47 AM

I have a difficult time rationalizing the logic of the design of the type of gusset that the SCTA requires as it looks like it just wants to originate a tear in the tubing but it's their football so it's their game.

Rex

I don't want this topic to move too far from the question..... which has been answered correctly, but remember that many SCTA rules are written in blood. Such is the case here. The gusset pictured in the rule book is stronger than just a tube by itself. That was the intent of the rule.

Title: Re: Gussets
Post by: Richard Thomason on April 03, 2009, 12:32:42 PM

Their are other types of gussets that are stronger and will pass tech under inspection. Check out the saddle type gussets used in aircraft construction.

Title: Re: Gussets
Post by: Schruiber on April 03, 2009, 03:29:58 PM

I add to Richard's comment regarding techniques used in aircraft - the book: Construction of Tubular Steel Fuselages for example has a great amount of info that could be helpful for an LSR project. It may be a good basis to start a dialog with tech inspectors.

You can now even download the book from  http://www.actechbooks.com/subcategories/38/

One reason to leave the corner open is to avoid too much welding in one area leading to a weaker weld and/or stress fractures; and only one side of the gusset is welded, either both on the same side or alternating.

Now some of you may ask why all this airplane stuff?  Well, in LSR - isn't the goal to fly really fast without lifting off?  :)

Michael Werner

Title: Re: Gussets
Post by: willieworld on April 04, 2009, 11:59:39 AM

http://eastsidecustomtruck.com/i-60211-tube-gusset.html


                    willie buchta