Old Atomic-Carbon proto's
 

As people want to see more pictures of the upgraded XX4 i do a few years ago, i thought it might be nice to post various photos from the different protos i have made over the years.

Hopefully it might inspire people to have a dabble themselves and mod there own cars :thumbsup: or dream up something new.

OK 1st up is a Slim 2 which i made back in 2006, it seems this layout style is catching on again :lol:

And a alternative version of the Slim 2 to reduce torque steer.

Big problem with both cars was the slipper clutch had no adjustment, it was either locked up or slipping like crazy.

I did race the car at a 2wd mid west regional at Marston Palmer and it felt like a 4wd to drive, but it was very very hard to put the power down without lighting up the rear tires, due to the slipper.

Ok next up is my idea of a upgraded Losi XX4 the 4X from 2008

Photo 1 - this was the 1st proto using a flat CF chassis to make sure everything fits before the mould is made for the tub chassis.

Photo 2 - This is comparing the car against a 501

Photo 3 - The tubbed version of the car, i am pretty sure Simon Reeves and Brian Preddy ran the car, problem i had was it really needed some aluminium parts like the motor plate instead of plastic which flex a lot. And with a XX4 rear end and a Cat SX front end, it would be to expensive to produce a kit as you need two donor cars. But with 3mm pitch and wider belts it was better suited for brushless and lipos.

Looks really good. Could you of used the xx4 front end as well? Thanks for the pics, loved my xx4 :)

Great thread, keep it up :)

XX4 front end was well know to be very weak hence using the Cat front end which was more upto the job :thumbsup: and dimensional was very very similar to the XX4 :D

It was super fast round Coventry right out of the car:thumbsup:
Where are the pics of the best proto ever ;-))

Which one :lol: there have been quite a few, found pretty much photos for ever proto and also some videos from testing days ! which i will try and have to get online somehow.

Wow superb........I m lovin it photo no: 1 & 2 .....................:wub.......:thumbsup:

The kinda xx-4 is just awesome!!!

in this day and age with the price of 4wd buggies, the x4 would probably sell, make some alloy parts and get a team driver to race it, see how good it does

Its about time you put these pictures on oople....

What about the XXX4, CR2, S2LW, S2, S4 and S44

T

When I ran the car at Eden Park it was really good, but like Jonathan said it needed 2 parts made out of alloy, as when the motor got hot the heat transfer caused the motor mount to twist and flex, as it was made from delrin.

I want a 4X!!!

that 501 i know from somewhere
 

Hi Jonathan

still got that 501 GTO with the engine more at front...it performed really well with the old heavy mh-batteries...

Greetings from switzerland
Maurice
:thumbsup:

Hi Maurice, yes was a interesting project, with the motor 10-12mm further forward for sure it helped with the steering.

Photo 1 is the proto and Photo 2 was the final car based on the Tamiya 501 with revised belts.

How about the 3 gear S2 just with the B4 gearbox turned round, and then the 4 gear one with the carbon fibre gearbox sides......:)

I have both in the garage, but not complete :(

You have a few missing from that list as well.

Slimferno / Raptor / Slim4 / Slim4 LCG / Foofighter / CR2T / MiniCDB / 201GTO / 410Ultra. Also there are a couple of cars i cannot post details on, but i will see if i can get permission to post them here, as they are very interesting.

The biggest amount of photos are for the Slim 2 / S2 as many different proto-types were made and tested with i think four completely different gearbox's used (B4 / GT2 / Carbon fibre gearbox / Plastic gearbox) over a two year period i think.

Im guessing the CR2T was the truck version of the CR2? Saw one on ebay the other day and almost wet my pants! :wub

I've got an CR2-T
Jonathan made this one especially for me for the Belgian GP 2010
Will make pictures tomorrow ;-)

Very interesting photos, interested to see some more!

How about your micro adventures jc? Where's the atomic Durango. Mmmm

Ooo........no............that is very poison !!!!:drool::drool::drool:

I only made two CR2T's the first one for Steven, which he let me use for a couple of laps across at the Belgium GP and felt really nice for a truck ;) , and i think the other was here in the UK.

This one was all red carbon, was very tempted to buy it!

very nice work, indeed...:thumbsup:
Jonathan, how did you have the modified belts for the GTO 501?
I have a prototype concept with a 511 based but don't know where to find good ones....

How did you get the weight forward with that setup?

I basically worked out the number of teeth i would need for the belts and downloaded lots of belt drive car manuals :) to see what the cars were using, but these days i use these guys http://www.beltingonline.com/

Was trying to get the weight back over the rear end rather than forward.

Hi Jonathan,

Do you think that company could get hold of some belts which would be stronger for the xx4? Noticed the one in your X4 arent green losi ones thats why i ask :)

Cheers, Tom

The problem with the xx4 belts is they are a strange pitch which is hard to find, i will try and dig out what it is, i think they are a american standard.

On the 4X i converted everything to 3mm HTD pitch belts, a lot of cars use this like touring cars and most off road cars which are metric ie Yok, Schumacher, Xray, Serpent etc, the belts are a lot easier to get hold of.

CR2-T RED
 

Hi, the red cr2-t on ebay was mine and still have it,its stunning and drives awesome has the gurnell 4gear box as well :D

i am running belts from there at the moment in the standard losi pitch but they wont last now when the avrg 6.5 is getting lose to 700W of power and the belts really are designed for your photocopier!!

Thanks for the info, is it easy to convert to 3mm or not worth it?

No it's because Losi belts are a different tooth profile, Losi use a low drag high bite profile called Stpd which seems to have been developed by Goodyear, the ones that most machines use, (some of which are pretty heavy duty and certainly not your average desktop printer) are htd which is more biased towards longevity and power handling insted of high speeds and efficency.

Ps. Loving this thread JC :-) Can't wait to see a full spread of pics from Slim 2 to C4.1

Pps. I know of a mk1 S2 prototype for sale if anyone is interested.

Should have known, LOL... is it being sold with a free can of Pledge???

Which bits do you need?

my understanding they were MXL pitch? giving it a 2.032mm pitch? the 3mm pitch as used on the SX3 is a mutch more robust belt for todays power

Ok time for a few more photos, these are from the Slim 4 which was the conversion for the BJ4WE with a 5mm thick CF chassis. There were several different version as listed below, i will post photos of the S4 & S44 at a later date.

Family tree -

1 - Slim4 5mm flat CF chassis - BJ4WE based
2 - S4 3mm CF tub chassis - BJ4WE based
3 - S44 3mm CF tub chassis - B44 based

I have been working out the faimly tree for the S2 / C4.1 this one is a bit longer than the Slim4 :lol:

1 - Slim2 - Shafted driven mid motor - flat CF
2 - S2 - Reversed B4 3 gear gearbox - flat CF
3 - S2 - Reversed GT2 3 gear gearbox - flat CF
4 - S2 G4 - Carbon fibre 4 gear gearbox - flat CF
5 - S2 Q - Plastic casing 4 gear gearbox - flat CF
6 - S2 Tub - Plastic casing 4 gear gearbox -tub CF
7 - S2 SWB - Plastic casing 4 gear gearbox -tub CF SWB
8 - C4.1 - Plastic casing 4 gear gearbox -flat alum (proto flat CF)
9 - S2 Evo - ;)