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Old 10-24-2007, 06:11 AM   #31
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:O you made that? i'm thinking of making a 1/12 car for my final GCSE DT project. our school has a laser cutter and computer controlled milling machine i think would be useful. but do you have any tips? i was a bit bothered about the steering knuckles. did you make them or build them yourself? and the drivetrain. i assume it's just plastic/metal gear direct drive?

thanks,

Joe
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Old 10-24-2007, 07:51 AM   #32
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joe of loath

"but do you have any tips? "
Sure what do you whant to now ?

"i was a bit bothered about the steering knuckles.
did you make them or build them yourself?"
No

Don't now if you have see it, what is in this posts:
"All the carbon - the x in the rear(it is stock GenX), and the battery center and cable holder is done on a Tag in the us by
is done by Doug
Powell from Powell Racing Components and he use a Tag mill.
And he don't have any thing to do about "Taig Tools"
www.taigtools.com

The front-end damping plate under the CRC A arm is done on a sherline
a 2000 mill as is the t-bar and the fiber glass parts in the front by me"

"and the drivetrain. i assume it's just plastic/metal gear direct drive?"
yes

Alf :-)

Last edited by alf.skaar; 10-29-2007 at 02:23 PM.
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Old 10-24-2007, 08:22 AM   #33
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thankyou! very... helpful.
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Old 10-24-2007, 11:03 AM   #34
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Quote:
Originally Posted by joe of loath View Post
thankyou! very... helpful.
joe of loath

It is hard to give you any advice when i don't now what you want me to help
you with, i have sent you a private message with my phone number, i persony
feel that is is better to talk on the phone whit this things, or i will try my best
to answer you question, don't forget i got my mill about three months ago.

Alf :-)
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Old 10-25-2007, 03:37 PM   #35
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Quote:
Originally Posted by alf.skaar View Post
joe of loath

It is hard to give you any advice when i don't now what you want me to help
you with, i have sent you a private message with my phone number, i persony
feel that is is better to talk on the phone whit this things, or i will try my best
to answer you question, don't forget i got my mill about three months ago.

Alf :-)
sorry, i just expected more than monosyllabic awnsers. but hey, if you're more comfortable talking over the phone thats good. i won't be designing it until the summer (still got part of my course to do) and won't start building it until this time next year, but i'm sure my parents would love me for calling internationally. oh well, its for education

joe
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Old 10-26-2007, 02:59 AM   #36
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Thank you all for the input

I have made som changes to lower A arm, and the CNC will run as soon i can get it done and i test more with damping, it works that is what i can say :-)

Alf :-)
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Old 10-26-2007, 05:04 AM   #37
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Quote:
Originally Posted by andrewdoherty View Post
ass=bad word in english. you might abbreviate Associated with AE instead. Just a thought.
kinda the same meaning, isnt it
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Old 10-29-2007, 02:12 PM   #38
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Quote:
Originally Posted by joe of loath View Post
sorry, i just expected more than monosyllabic awnsers. but hey, if you're more comfortable talking over the phone thats good. i won't be designing it until the summer (still got part of my course to do) and won't start building it until this time next year, but i'm sure my parents would love me for calling internationally. oh well, its for education

joe
I can call you back, i call for free at most off the world.
Ip phone :-)

Don't worry about that

But as all design is start whit the idea. :-)
Then you may make Somme rough paper drawings
Then you draw it in you favorite 3D or 2D program
Print it out on thick paper (0.25 mm) do allot off thinking and mount the rear front servo, damper, side damper, etc.
then you fix the errors then you do it again.
and at the end, when you are 100 % sure
you make the G-code that you CNC program need to make the parts
you may cut it in thin wood or some soft plastic before cut it in carbon fiber to make sure it are all 100 %

Don't now if it is something like this you are looking for

For me this will be more easy to take on the phone, sine you may have Somme question, i'm sure that this are only one of many ways to do it

O well i guess i shod started a post about car design, since many are interested i that.

Alf
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Old 10-29-2007, 02:16 PM   #39
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mmmm.... internet telephony...

well, thankfully our laser cutter is foolproof. just shoot the finsished drawings at it (1/1 scale of course) and it'll do the hard work for you. if i can get a copy of the program from school i'll start soon, to make it a bit easier. just one question:

how does the T bar suspension work? where does it pivot? on a ball joint at the end of the longitudinal bar? i could always just give it flat damping but thats a bit too easy
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Old 10-29-2007, 02:32 PM   #40
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joe of loath
I call all over the world and it work great

I don't think you can cut carbon fiber with laser

The t-bar is flexing and doing Somme pivot on the back pivot
(close to the motor)
i didn't that you don't have a 12 scale car you will need one sine you are
going to have a hard time if you do all the parts.

Alf :-)
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Old 10-29-2007, 03:09 PM   #41
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hmm well for starters i was thinking of polycarbonate, but maybe i can use the milling machine to do some carbon fibre. and if i don't have the parts, i can make it up as i go along i'm going to rely on chassis flex for front suspention, and a hinged T bar at the back.
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Old 10-29-2007, 03:21 PM   #42
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joe of loath

It you look at Somme old design off 12 scale cars it didn't have any
suspension at all

My first 12 scale car :-)
http://home.no.net/rcutstyr/elektro_...irage_t_2.html

http://www.8ung.at/rccars/museum/files/ccar_c.html

No this is not my page.

Have fun

Alf :-)
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Old 10-29-2007, 03:37 PM   #43
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auf deutsch! the second one is what i'm looking at building, infact almost exactley. it looks like home made radio gear in that one too ^.^ good job i dont do electronics or i would be making an esc or something
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Old 10-29-2007, 08:48 PM   #44
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I'm still having trouble trying to work out the front suspension.

I understand the delrin pieces have fluid in them for damping. Is the t-bar type piece the spring or is there a spring inside the delrin piece like on any other type 12th scale? If the t-bar type piece is the spring, how does it work? If it's not, why is it there? Is it just so the upper arms are longer to reduce negative camber gains under loads?

Could you show a photo of the front suspension from a different angle so I get a better look at it?

Thanks
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Old 10-30-2007, 01:25 AM   #45
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GreaseMonkey

In side ther is a sping, normal king pin. goes up and down inside the cup

the up fiber glass is for making the uper A arm longer and to alter the roll center
and the recative caster.

I have a new design when the CNC have run, i will do som new pictures or se
if i can get som off the curent one

Alf :-)
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