basic understanding

[yokoyoko]

Hi
sorry for posting so late but on my own project I am very busy at the moment.

any ideas an which drive shaft would work on ebay

http://www.ebay.co.uk/itm/NRC7704-LAND-ROVER-DEFENDER-LOWER-STEERING-COLUMN-SHAFT-UNIVERSAL-JOINT-/290734658995?_trksid=p4340.m185&_trkparms=algo%3DSIC.NPJS%26its%3DI%26itu%3DUA%26otn%3D5%26pmod%3D370384010828%26ps%3D63%26clkid%3D2219712154783626490
this is used often.
Alternative:
http://www.ebay.de/itm/Kardangelenk-fur-xj-650-xj650-/150902359670?pt=Motorrad_Kraftradteile&hash=item23227b4676
Any bike drive shaft (if they got one ^^) for "smaller" design and up to driveshaft of a Land Rover and co. You will have to trim the one part and weld it on a steel plate to mount.
BUT there are so much things that will work! I recommend: Try looking online and see what is available to you locally. Auto part stores and local mechanics are a good place to look. Find out your options, compare their prices, then get the best you can buy.

To other points:

Have a look at a motorcycle strut and spring.

nice idea

The 12v winch motors are good, but really , for sim setup, they need help. Aldoz found that out.
Although, then again, prove us wrong!

The same here. I had to learn this on my own BUT at such a build as you want to realise ---> Please don't economize on the motors if you can't secure high quality! It's one of the more important parts of your sim.
I can understand that you want to keep it as cheap as possible but buying two times is more expensive than buying fitting parts for beginning.

http://www.ebay.de/itm/Federbein-Dirt-Bike-Mini-Quad-49cc-2-Takt-Feder-Stosdampfer-Cross-MX-Scooter-/220866436650?pt=Motorrad_Kraftradteile&hash=item336caa5e2a --> pocketbike
there ara also springs and struts of quad's interesting:
http://www.ebay.de/itm/Quad-ATV-Stossdampfer-Feder-Lange-220mm-D-72-5-mm-/160420119409?pt=Motorrad_Kraftradteile&hash=item2559c8c371
-> not calculated just for suggestion as construction possibility

If you want to step deeper without using a calculator: http://www.federnshop.com/Zwischenmenu.aspx?menu=calc&lang=01
Choose your type of spring and play with the diameters and co to get the force you have to support.
here is the menu:

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[motiondave]

Thanks yokoyoko, thats some good links posted there.
The pocket bike spring idea is good as well. Didn't think of that small a machine, but a good idea.
Also the various uni joints listed will work.

[hullcityafc]

thanks guys sorry for late reply been a bit busy at work.. but links and ideas are great.