Visit our Twitter feed for more great content
CKC

CycleKart Tech Forum

The classic Ladder Frame.

AutoShrine Sponsor
AutoShrine Sponsor

Denny Graham Gold Member Dennis Graham
Sandwich, IL, USA   USA
1950 Chevrolet 3600 "Old Blue"
1954 Chevrolet 3600
delete



Edited 1 time(s). Last edit at 2019-02-18 03:03 AM by Denny Graham.

. Hide banner ads & support this website by becoming a > Gold Supporting Member <
carChips Avatar
carChips Victor Harnish
Kelowna, BC, Canada   CAN
1933 MG Magnette
1973 Triumph Spitfire 1500 "Chip"
1989 GMC Sierra 1500 "Bush Truck"
I've noticed that in mine. If I don't block it up square. it gets a little twist but always comes back flat.



S'all for now!

andrewroudny Avatar
andrewroudny andrew roudny
peterborough, ON, Canada   CAN
1939 CycleKart German "The Vulture"
My frame is bolted together fibreglass and aluminum parts. I have not had noticeable twist. Tho I haven't specifically tested for it.



"I never lose. I either win or learn.”
-Nelson Mandela

. Hide banner ads & support this website by becoming a > Gold Supporting Member <

Attachments:
20151202_204217.jpg    37.7 KB
20151202_204217.jpg

Rhysn Rhys Nolan
Tamworth, Staffordshire, UK   GBR
That chassis format has the torsional rigidity slightly better than wet spaghetti!

Denny Graham Gold Member Dennis Graham
Sandwich, IL, USA   USA
1950 Chevrolet 3600 "Old Blue"
1954 Chevrolet 3600
delete



Edited 1 time(s). Last edit at 2019-02-18 03:04 AM by Denny Graham.

CmdBentaxle Avatar
CmdBentaxle Dave D
Federal Way, WA, USA   USA
1950 CycleKart Italian "1950 Ferrari 166 F2"
My frame is 6061 t6 1x3 tube, bolted as you know.
It has top and bottom gussets at every intersection.
After 3 yrs you can lift the car at any corner and see no twist.
But If you really want rigidity with the lightest weight,
build an actual Stevenson torsion box.

Rhysn Rhys Nolan
Tamworth, Staffordshire, UK   GBR
Dave, I reckon that your corner gussets contribute a whole lot more to the situation than a simple welded steel corner does.
Other wise try this. Or the Stevenson torque box.


Attachments:
P3090510.JPG    75 KB
P3090510.JPG

CmdBentaxle Avatar
CmdBentaxle Dave D
Federal Way, WA, USA   USA
1950 CycleKart Italian "1950 Ferrari 166 F2"
Ah, the old Voisin frame still needing a new home.

Rhysn Rhys Nolan
Tamworth, Staffordshire, UK   GBR
In reply to # 38300 by CmdBentaxle Ah, the old Voisin frame still needing a new home.

There would be very few lighter, torsionally stiffer frames!
The material, the facilities and the will to make another frame like that is here in Tammif (local dialect), maybe it needs a Birdcage Maser? I seriously can't think of the inspiration to put it inside.
TBH I'm torn, the "ladder" frame is a crock of, the frame you see was triangulated by the attached stressed panels (sorry Denny), but I have promoted the Stevenson box so strongly, I have no idea which to head.



Edited 2 time(s). Last edit at 2019-02-12 01:36 PM by Rhysn.

Denny Graham Gold Member Dennis Graham
Sandwich, IL, USA   USA
1950 Chevrolet 3600 "Old Blue"
1954 Chevrolet 3600
delete



Edited 2 time(s). Last edit at 2019-02-18 03:04 AM by Denny Graham.

CaptJimmO Avatar
CaptJimmO Gold Member James J O'Donnell
Abbotsford, BC, Canada   CAN
1972 BMC Racecar "BUGSPRY"
2001 CycleKart Lightweight "Dag"
2006 Other Custom "BandAid Car"
. . what about a light 'Pratt Truss' . . . . . .


JimmO



"just another colourful stitch in the rich tapestry of life"

CK Skunk Werks, Mission BC


Attachments:
Pratt-Truss-Type-Example-Setup.jpg    8.5 KB
Pratt-Truss-Type-Example-Setup.jpg

CmdBentaxle Avatar
CmdBentaxle Dave D
Federal Way, WA, USA   USA
1950 CycleKart Italian "1950 Ferrari 166 F2"
The trouble is that when I look at it, all I see is the Voisin.
I guess if you were starting fresh you could just make alterations to fit what you need.
Anything stir the embers lately?

CmdBentaxle Avatar
CmdBentaxle Dave D
Federal Way, WA, USA   USA
1950 CycleKart Italian "1950 Ferrari 166 F2"
Actually the corner gussets add quite a bit. But, absent the experience you'd have to take my word for it I guess.

Rhysn Rhys Nolan
Tamworth, Staffordshire, UK   GBR
As I edited what I posted before most of the follow up comments, it's unfair of me to suggest you look at stressed skin, in conjunction with the space frame. The corner gussets add hugely. There are weaknesses in some bays, that's inevitable as you actually have to insert your body(person) through some gaps.I suggest Costin and Phipps, as a resource "The design and construction..." for a sound knowledge. Even in this primitive form it's exponentially better than a "ladder" frame.

Woodysrods Avatar
Woodysrods Silver Member Brian Woods
Westbank B.C., Canada   CAN
I had better take picture of the Ice Racer Frame and post it tonight.........it is RIDGID!
I will also weigh it.........as it is all steel to this point and may look extremely heavy in
the picture.
Made from all FREE material coming from the Ducati packing crate!smiling bouncing smiley
Brian

. Hide banner ads & support this website by becoming a > Gold Supporting Member <

To add your reply, or post your own questions




Registration is FREE and takes less than a minute!


Having trouble posting or changing forum settings?
Read the Forum Help (FAQ) or contact the webmaster





Join The Club

Sign in to ask questions, share photos, and access all website features

Your Karts

1950 CycleKart Italian

Text Size

Larger Smaller
Reset Save

Sponsor Links