Race chassis

[husaberg]

I will link it to crazy's thread or just post it there as well

[crazy man]

nice wright up it would be cool to be in there shoes

[Brian d marge]

Do a freebody diagram , to figure the loading Start with static first, then 45 deg static then , estimate the dynamic , ( or use strain gauges!! , which can be surprisingly cheap , even paint ! can be used )

Then do a bending moment diagram ( don’t worry tis easy and all on the the internet ! )

This will give u the shape of your swing arm

Stephen

or send the sketch

[husaberg]

OK He did some interesting things i guess Swiss attention to detail bordering on OCD.

A virtual Chocky fish for anyone who can pick up on the eerily similar statements from the last two lots of articles I have posted regarding.....

[chrisc]

I love this thread and am learning a lot. If anyone has a few articles regarding swingarm design plea se do post. Or if you could refer me to somewhere which does, I'm all ears

[crazy man]

I love this thread and am learning a lot. If anyone has a few articles regarding swingarm design plea se do post. Or if you could refer me to somewhere which does, I'm all ears

have a look here http://www.kiwibiker.co.nz/forums/sh...-the-wise-ones has a bit on a guy building one think its the sec to last post

[Bert]

have a look here http://www.kiwibiker.co.nz/forums/sh...-the-wise-ones has a bit on a guy building one think its the sec to last post

Then followed up with:
http://www.kiwibiker.co.nz/forums/sh...post1130337596

[husaberg]

I love this thread and am learning a lot. If anyone has a few articles regarding swingarm design plea se do post. Or if you could refer me to somewhere which does, I'm all ears

I always enjoy this site for interesting stuff. The Guy (Julian Edgar Ex fast fours technical editor) is super clever and great at resourcing interesting bits.
http://autospeed.com/cms/title_Worki...8/article.html
http://autospeed.com/cms/title_Zero-...5/article.html
http://autospeed.com/cms/title_Build...9/article.html
http://www.autospeed.com.au/cms/A_111162/article.html

Ps what are you intending to build?

[chrisc]

Awesome, thanks guys, that'll keep me busy during my work breaks. I'm already following the Team GPR thread with high interest Bert! Hopefully there is a bit more tech talk about what and why.
The next project after my Datsun and the current low budget bucket build is to build a frame and swingarm to run otherwise factory components from something interesting. I'm really interested in the engineering side of motorcycles and get pretty obsessed sometimes with learning it, the hard part is applying it between long work hours. Thanks again guys!

[carburator]

Awesome, thanks guys, that'll keep me busy during my work breaks. I'm already following the Team GPR thread with high interest Bert! Hopefully there is a bit more tech talk about what and why.
The next project after my Datsun and the current low budget bucket build is to build a frame and swingarm to run otherwise factory components from something interesting. I'm really interested in the engineering side of motorcycles and get pretty obsessed sometimes with learning it, the hard part is applying it between long work hours. Thanks again guys!

The Automotive Chassis:
Engineering princples
J reimpell & H Stoll.

although its car/truck based the maths and princples remain the same, more for the swing arm.

[husaberg]

posted this elsewhere but it probably belongs here i guess it has a couple of neat tricks one with the one off method of doing a fuel tank for sealing the polystyrene with emulsion paint so you can fill it up to dissolve the polystyrene later and the other with the Plasticine and Hardboard.

it was written well before the black death was probably invented.
if you are going to plan on using the stuff either CF or FG use the proper PPE please also here is a few bits and bobs i have collected on trolls of the net as well.
Re CF
http://www.youtube.com/watch?v=l9x2P...eature=related
http://www.perthstreetbikes.com/foru...n-fibre-61248/
http://www.instructables.com/id/How-...Finished-bike/
http://www.kr1s.co.uk/forum/viewtopi...b33aed5b7d6adc
http://www.sheldonbrown.com/rinard/carbon_fiber.htm
there was lots more but they have died it would seem but there is plenty of stuff on the net plus remember tire remouders/Retreaders have Autoclaves and making tires is thirsty work......
Buried on the net is how to make vacuum bags for the diy option if they are not in my current links.

I was going to do a spar frame with CF based around a Surf board core as it is easy to work plus free....
if you do do that make sure any inserts are anodized as electrolysis is an issue with CF.
Plus remember CF is an electrical conductor so if you have flash electronic it can talk through the frame.
I think actually one of the few patent's John Britten ever applied for was for his novel "Cats Cradle" method of working with carbon string but the string is far beyond my capabilities.but from memory he only ever used one roll of thread to build 3 bikes or something so it is relatively inexpensive esp as i think he blagged it. He was a smooth bugger able to talk people into doing stuff for him or giving him stuff.

The guy who wrote the article (before i was born no less) Was John Robinson the bearded tech editor sometime author from Performance Bikes.


As always with my attachments click on them a couple of times once they have loaded to get them suopersized until you see the - button with the magnifying glasses.

[Grumph]

On the ESE thread there's a paper posted by Brian damage on frame optimisation. After wading through it the only useful bit I've gained is from the graph of tube thickness vs weight...and the impression that Swiss mathematicians have a lot of time on their hands.

The relevant bit is that the use of tubes of a useful thickness -ie easily weldable - has a very small penalty in terms of the finished weight of the complete motorcycle. Experience tells me the resultant frame will be a lot more crashable too.

So no need to use 20G to achieve the last degree of ideal perfection. After all unless you are or can find a small light rider it's all wasted anyway.

Also on there is the pic of the Tulare 2T single. Thanks Husaberg. I like the adjustable swingarm pivot setup - pivot height has a marked
effect on handling. Just keep the chain adjustment separate please....

[husaberg]

On the ESE thread there's a paper posted by Brian damage on frame optimisation. After wading through it the only useful bit I've gained is from the graph of tube thickness vs weight...and the impression that Swiss mathematicians have a lot of time on their hands.

The relevant bit is that the use of tubes of a useful thickness -ie easily weldable - has a very small penalty in terms of the finished weight of the complete motorcycle. Experience tells me the resultant frame will be a lot more crashable too.

So no need to use 20G to achieve the last degree of ideal perfection. After all unless you are or can find a small light rider it's all wasted anyway.

Also on there is the pic of the Tulare 2T single. Thanks Husaberg. I like the adjustable swingarm pivot setup - pivot height has a marked
effect on handling. Just keep the chain adjustment separate please....

Turns out the guy was head of R7D for Renualt F1 at one time (and quite possibly is an actual rocket scientist)

http://www.motorcycle.com/how-to/cha...sics-3444.html

Unique Design Aspects Of Tul-aris Featured In Book About Motorcycle Design And Engineering

From an e-mail from Dr. Rob Tuluienot to me but off the net)

The Tul-aris is featured repeatedly in the brand new motorcycle engineering book "Motorcycle Handling and Chassis Design" by Tony Foale. The book is a comprehensive review and an assessment of the current state of motorcycle design and development, investigating many interesting aspects of motorcycle engineering with sound physical reasoning. Several times throughout the book the unique aspects of the Tul-aris are described, including a discussion of the ground-breaking work using laboratory vehicle dynamics testing as well as virtual dynamic simulations for the design and development of the Tul-aris. The book considers the Tul-aris project a trend setter for the future of motorcycle design and development. More information on the new book is available at www.tonyfoale.com


In addition, the Tul-aris design and development process was presented at the 2000 SAE Motorsports conference, which is attended by many industry-leading engineers in the car and motorcycle racing world. The accompanying SAE paper describing this work is SAE 2000-01-3576, available at http://www.sae.org/servlets/index

[husaberg]

Carbon tube

well it can be done like an early style lugged frame i guess,





http://www.carbonfibretube.co.nz/ind...on_Tube_Prices

[husaberg]

Most are Aprilia a few of the shy KTM thanks for the link Lozza.