LocostUSA.com

Learning how to build Lotus Seven replicas...together!
It is currently April 16, 2024, 4:32 pm

Board index » The North American Locost Forums » Building Non-traditionally - Mid engine etc.

All times are UTC - 5 hours [ DST ]



Post new topic Reply to topic  Page 1 of 1
  [ 6 posts ] 
  Print view Previous topic | Next topic 
Author Message
KinFung
 Post subject: Forged carbon chassis?
PostPosted: February 7, 2023, 1:35 am 
Offline

Joined: September 20, 2011, 7:21 am
Posts: 112
Czinger 21C use 3d print aluminum a pillar
lotus & nichols n1a made by aluminium extrusion
hand made forged carbon are as strong as aluminium alloy (https://www.youtube.com/watch?v=eewlYa6IQPg&t=2s)

maybe forged carbon parts + glue & bolt to make chassis will work?


another example: these 3d print aluminum parts can replaced by forged carbon
https://www.youtube.com/watch?v=YRqwmDHZkjA

and the aluminum main ring can also replaced
Image
Top
 Profile  
Reply with quote  
Driven5
PostPosted: February 8, 2023, 12:24 am 
Offline
User avatar

Joined: April 26, 2008, 6:06 pm
Posts: 3268
Location: Under the weather. (Seattle)
KinFung wrote:
hand made forged carbon are as strong as aluminium alloy (https://www.youtube.com/watch?v=eewlYa6IQPg&t)
The thing he doesn't show is just how much weaker CF is in compression than it is in tension. As much emphasis as we place on torsional chassis strength for performance, any amount of crash safety requires compressive strength.

Could it work? Certainly. There are plenty of carbon tub cars out there. However, the first chassis would not be quick, easy, or cheap to design and build correctly.

The reason I'll stick with steel for any safety critical elements is that it's far more forgiving to the TLAR (That Looks About Right) engineering used for these types of builds.

_________________
-Justin

"Orville Wright did not have a pilots license." - Gordon MacKenzie


Last edited by Driven5 on February 9, 2023, 2:23 pm, edited 3 times in total.

Top
 Profile  
Reply with quote  
KB58
PostPosted: February 9, 2023, 12:51 pm 
Offline
Mid-Engined Maniac

Joined: April 23, 2006, 8:26 pm
Posts: 6418
Location: SoCal
We used to make carbon-bodied aircraft and would occasionally get back crashed ones for repair. Picture a car made entirely of wood, and what it would look like after a crash, shattered, splintered, and cracked. That's what happens to carbon in compression. Now picture what would happen to a driver when impacting said surfaces...

_________________
Midlana book: Build this mid-engine Locost!, http://midlana.com/stuff/book/
Kimini book: Designing mid-engine cars using FWD drivetrains
Both available from https://www.lulu.com/
Top
 Profile  
Reply with quote  
a.moore
PostPosted: February 25, 2023, 5:01 pm 
Offline
Always Moore!
User avatar

Joined: November 9, 2007, 3:40 pm
Posts: 4075
Location: Pittsburgh, PA
KB58 wrote:
That's what happens to carbon in compression. Now picture what would happen to a driver when impacting said surfaces...


They walk away unharmed?

https://www.youtube.com/watch?v=1hW5MpdA5Cg
https://www.youtube.com/watch?v=zieVq1JDAEo

_________________
-Andrew
Build Log
Youtube
Top
 Profile  
Reply with quote  
JAMADOR
PostPosted: February 27, 2023, 10:29 am 
Offline
User avatar

Joined: November 6, 2020, 6:29 pm
Posts: 603
Location: Spring, TX
a.moore wrote:
KB58 wrote:
That's what happens to carbon in compression. Now picture what would happen to a driver when impacting said surfaces...


They walk away unharmed?

https://www.youtube.com/watch?v=1hW5MpdA5Cg
https://www.youtube.com/watch?v=zieVq1JDAEo

Difference there being that those are purpose built multi-million dollar cars, designed with driver safety in mind.
Kubica's crash was pretty horrifying though.

_________________
1975 MG Midget
http://www.locostusa.com/forums/viewtopic.php?f=36&t=24382
13B Powered Rotus Geauxkart
http://www.locostusa.com/forums/viewtopic.php?f=35&t=20899
Top
 Profile  
Reply with quote  
KinFung
PostPosted: March 4, 2023, 9:05 pm 
Offline

Joined: September 20, 2011, 7:21 am
Posts: 112
JAMADOR wrote:
Difference there being that those are purpose built multi-million dollar cars, designed with driver safety in mind.
Kubica's crash was pretty horrifying though.

thats y I prefer to use forged carbon, forged carbon are easier to cointrol than carbon fiber cloth
Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 6 posts ] 

Board index » The North American Locost Forums » Building Non-traditionally - Mid engine etc.

All times are UTC - 5 hours [ DST ]

Who is online

Users browsing this forum: No registered users and 1 guest

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
POWERED_BY