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View Full Version : M24-Pro New 1/24 RC race car project.


xemet
2005.09.17, 04:10 PM
Hi guys,

This is my last project, a 1/24 RC car with the following features:

- 4 wheel drive
- belt transmission
- LiPo powered (7,4 Volts, 910 mA/h)
- Full indipendent front and rear sunspensions with coil spring dampers
- two adjustable ball differentials
- carbon fiber chassis
- mechanics in aluminium and ball beared
- foam tires

Finally I've got a mini-lathe and a micro milling machine, so I can machine my own parts (I'm very happy!! :D ). So I've designed this my dream car!...almost totally new. I've only used some parts from mini-X like dogbones and wheel shaft. also I've used microRS4 damper, but I had to modify them.

The car is almost done, I've to machine only a front bumper and body supports...but the BIG work is done.

Now pictures! From the beginning (two months ago...I've worked on it only in my free time...)

Some parts:

http://xemet.altervista.org/immagini/MVC-508F.JPG

One of the two ball differentials

http://xemet.altervista.org/immagini/MVC-507F.JPG

Rear differential and suspension arms mount

http://xemet.altervista.org/immagini/MVC-547F.JPG
http://xemet.altervista.org/immagini/MVC-548F.JPG

with bearing installed:

http://xemet.altervista.org/immagini/MVC-549F.JPG

differential in place:

http://xemet.altervista.org/immagini/MVC-550F.JPG
http://xemet.altervista.org/immagini/MVC-551F.JPG

Rear suspension assembly:

http://xemet.altervista.org/immagini/MVC-573F.JPG
http://xemet.altervista.org/immagini/MVC-575F.JPG
http://xemet.altervista.org/immagini/MVC-576F.JPG
http://xemet.altervista.org/immagini/MVC-577F.JPG
http://xemet.altervista.org/immagini/MVC-578F.JPG
http://xemet.altervista.org/immagini/MVC-579F.JPG

Front suspension assembly:

http://xemet.altervista.org/immagini/MVC-625F.JPG
http://xemet.altervista.org/immagini/MVC-626F.JPG
http://xemet.altervista.org/immagini/MVC-625F.JPG
http://xemet.altervista.org/immagini/MVC-627F.JPG
http://xemet.altervista.org/immagini/MVC-629F.JPG

with a small screw driver you can adjust camber:

http://xemet.altervista.org/immagini/MVC-623F.JPG

and with a small hex key you can adjust height:

http://xemet.altervista.org/immagini/MVC-628F.JPG

Everything mounted on a temporary chassis for testing purpose only:

http://xemet.altervista.org/immagini/MVC-632F.JPG

Definitive carbon fiber chassis:

http://xemet.altervista.org/immagini/MVC-686F.JPG
http://xemet.altervista.org/immagini/MVC-687F.JPG
http://xemet.altervista.org/immagini/MVC-688F.JPG

Carbon fiber upper desk with servo and lipo cells installed:

http://xemet.altervista.org/immagini/MVC-689F.JPG
http://xemet.altervista.org/immagini/MVC-690F.JPG

How you can see almost everything is lower than wheels:

http://xemet.altervista.org/immagini/MVC-691F.JPG

Pinion and gear close up:

http://xemet.altervista.org/immagini/MVC-692F.JPG

I can swap between three pinions, 12T, 13T and 14T...

This is all for now! I've to connect all wires from spy ESC and GWS pico-receiver in a neat way and I will post new pictures...

This car is extremely fun to drive drifting on my marble floor...it is also very fast...it weights 215 g all included...a mini z with a decent set of optionals weights the same...but I've 7,4 Volt and a 4wd car...also with a decent suspension system!Very nice :D !

Every comment or suggestion is welcome!
I hope you will like it!
Thanks for your attention.

Bye

xemet
2005.09.17, 04:25 PM
Please let me know if you can see the pictures.

If you don't see them dirct clickng on the link, please try to copy past it in your browser and let me know if it works.

If you can't see the pictures at all, please let me know and I will try another way to post them.

Many thanks

davkin
2005.09.17, 04:48 PM
That is freakin' awesome!!!! How long have you had a mill and lathe? I've had mine for a year and a half and couldn't make something like that! That is an awesome design, truly like a 1/10 scale car scaled down. How did you incorporate pillow balls into the uprights? With some judicious removal of material I sure you could drop the weight considerably too and not worry about breakage, it all looks pretty darn beefy right now.

When I see stuff like this built by individuals it enhances my belief that Kyosho really sucks. I really think we're getting ripped off, I've been saying that for a long time. Looks like Iwaver is forcing them to lower prices a bit, but Iwaver has some quality and functionality issues, however there is hope they my push the envelope soon with their next gen car. However there is no reason a car like you've designed there couldn't be mass produced. This new Kyosho AWD car that is coming out this fall has the same crappy suspension but with AWD, big f'n deal, and we'll have to pay $50 more for it. Not me!


Sorry, got into rant mode there. :) BTW, I had to copy and paste the links into my browser to see the pics.

David

xemet
2005.09.17, 05:17 PM
Many thanks...

Yeah...maybe you will not believe to me...(sometimes I don't believe it too!)

I've my lathe and mill since 3 months, and this is my first job...

But I 've to say that I've always loved to watch at people working with these instruments...and I've watched them a lot at university.

So I can say that lathe and mill was inside me, like an instinct, the only problem was that I did not own them!! Now the problem is solved!

But consider that I've not machined the gear teeth...I don't have the right equipment to do it. So I've purhcased the gear on this wonderful online shop: www.sdp-si.com her I've also purchased the belts. I've not machined the rims too. They are made by SSH for slot cars...but I'm working to machine mine...it si not difficult to machine them...the fact was that I had previously purchased them for my previous prototype (made from a mini x...I did not own a lathe yet) so I used them...

Kyosho could produce car like this without difficulties...the problem of the mini z is the design that I don't like very much. Also the awd have the same "style" of the mr01 and 02...

MiniX have a very intersting design, but it definitely lacks in quality and materials...I think that the designer of miniX was definitely more able than the designer of the mini Z cars...probably the problem was the possibility of the Xpress to produce at an higer standard of quality.

However, now I speak about my car...

Yes I think that weight could be lowered...but...I've always to consider the possibilities of my milling machine...I succed in working well on aluminium with 3mm mills, smaller diameters would need higer rotation speed...
Working with 3 mm mills causes some serious limits in the designs of parts. However, yes, with more attention weight could be reduced, and I will consider it in the future. I wish a CNC milling machine!!!!!

Now, please explain me what do you mean with "pillow balls into the uprights"...sorry but I don't speak (and understand) english very well...Do you mean the balls in the knuckles? (the part where are mounted the front wheels?). If yes, so the system is the same that in a commn 1/10 car...but I cannot explain it in english sorry...I'm not able to do it! If you want I can send a exploded view of the part to you by email so you can figure out the way it is made.

Look at this picture...maybe I've forgotten it in the previous post:

http://xemet.altervista.org/immagini/MVC-622F.JPG

Maybe now is more clear...

Many thanks again! And sorry for my english...I feel like a monkey!!

bye :)

gasman1
2005.09.17, 06:38 PM
Many thanks...

Yeah...maybe you will not believe to me...(sometimes I don't believe it too!)

I've my lathe and mill since 3 months, and this is my first job...

But I 've to say that I've always loved to watch at people working with these instruments...and I've watched them a lot at university.

So I can say that lathe and mill was inside me, like an instinct, the only problem was that I did not own them!! Now the problem is solved!

But consider that I've not machined the gear teeth...I don't have the right equipment to do it. So I've purhcased the gear on this wonderful online shop: www.sdp-si.com her I've also purchased the belts. I've not machined the rims too. They are made by SSH for slot cars...but I'm working to machine mine...it si not difficult to machine them...the fact was that I had previously purchased them for my previous prototype (made from a mini x...I did not own a lathe yet) so I used them...

Kyosho could produce car like this without difficulties...the problem of the mini z is the design that I don't like very much. Also the awd have the same "style" of the mr01 and 02...

MiniX have a very intersting design, but it definitely lacks in quality and materials...I think that the designer of miniX was definitely more able than the designer of the mini Z cars...probably the problem was the possibility of the Xpress to produce at an higer standard of quality.

However, now I speak about my car...

Yes I think that weight could be lowered...but...I've always to consider the possibilities of my milling machine...I succed in working well on aluminium with 3mm mills, smaller diameters would need higer rotation speed...
Working with 3 mm mills causes some serious limits in the designs of parts. However, yes, with more attention weight could be reduced, and I will consider it in the future. I wish a CNC milling machine!!!!!

Now, please explain me what do you mean with "pillow balls into the uprights"...sorry but I don't speak (and understand) english very well...Do you mean the balls in the knuckles? (the part where are mounted the front wheels?). If yes, so the system is the same that in a commn 1/10 car...but I cannot explain it in english sorry...I'm not able to do it! If you want I can send a exploded view of the part to you by email so you can figure out the way it is made.

Look at this picture...maybe I've forgotten it in the previous post:

http://xemet.altervista.org/immagini/MVC-622F.JPG

Maybe now is more clear...

Many thanks again! And sorry for my english...I feel like a monkey!!

bye :)


I'm clicking on the links but no tgettin the pics

HammerZ
2005.09.17, 06:44 PM
You need to copy and paste them to see them. Nice setup by the way.

starz
2005.09.18, 01:57 AM
Hi guys,
to see the pictures click here : http://starz.nuxit.net/modules.php?name=News&file=article&sid=47 (www.star-z.org)

:)

xemet
2005.09.18, 02:59 AM
sorry for the pictures iussue...I don't know why in doesn't work clicking directly on the link. However if you copy and paste the link in your browser it works.

bye

PlagueWulf
2005.09.18, 07:51 PM
That looks awsome!
Gives me real inspiration to do my 4wd MZM.

Can you post a picture of the mini-lathe and micro milling machine, and what do such machines cost?

herman
2005.09.18, 11:43 PM
fantastico!!! what's the size of the belts? how / where did you get them? were they special order? have you considered doing a shaft driven 4wd set up?

fantastic work.

.cooldragon
2005.09.19, 02:21 AM
Ok, you did it: I will have to retake my old project, since now I do have a brilliant reference and good adresse to purchase the parts I do not want to machine myself...

Congrats, but... wWhat about a Demo-Video :)

cd, amazing

xemet
2005.09.19, 03:56 AM
Thank you all!

Demo video? I still have to finish the car!!

to Herman:

go to www.sdp-si.com and you will find everything to transfer motion...belts, gears and thousands of other components. No, they aren't special design or order (but if you're so crazy, this shop can machine the parts you want...also, if you want to have designed a part they call their engineers for you! But I think this will cost a lot of $$$$, maybe you could do it if your name is IBM or Apple...), however, they are metric GT 2 mm pitch belts that costs 2$ :D. This shop has the most beautiful catalogue I've ever seen. You can also download 3d model for every part in the catalogue, this is the best thing if you want to design something! Of course you can order online. :D I did want to build a belt transmission car, so I did not consider shaft transmission very much, but it is possible, with components you find in that shop you could do it very simply, they have the gears, you should modify them in order to transform them in differentials, almost the same work I had to do with pulleys, it is an high precision work, but perfectly possible. The problem with shaft transmission is that you should mount the motor longitudinally, like a xray or miniX, this causes that the car tend to go left or right during fast accelerations...because of the contrary reaction of the motor that tend to pull the car on a side.

to PlagueWulf:

Micro Milling machine is a Proxxon MF70 and costs about 250 Eur (or $) I bought it on ebay in german. Lathe is a "Mini-Lathe", see it on www.mini-lathe.com it is made in china (but of excellent and proved quality) and it is sold in many countries with a lot of different names, if you are from USA I think you can find it as Grizzly or HarborFreight, but it is always the same object. it costs about 500$. I've bought it on ebay too.
Pictures:

http://xemet.altervista.org/immagini/MVC-323F.JPG
http://xemet.altervista.org/immagini/MVC-552F.JPG

Thanks to all again!

bye

PlagueWulf
2005.09.19, 03:46 PM
Thank you for the information!

English is not my first language so I have some trouble with the "tecnical" words and didnt quite know what those machines were. But now I know, very helpful, and that site with the gears/belts etc. will see an order from me soon enough ;)

I have some limited access to both those machines, but they are a larger scale. I will have to test them to see just how small stuff I can make on them. (Always wanted something like those small machines at home - maybe if I can make some room for them I will consider buying something similar).

xemet
2005.09.24, 05:40 PM
Hi,

My website is now active:

www.m24-pro.com

It is still in italian, but I think you can find a lot of new pictures there.

I'm not a web designer, so I hope the site works correctly. It is designed to be viewed at 1024x768 resolution. Please let me know if you encounter difficulties.

Thanx.

Bye

Mondo
2005.09.24, 05:59 PM
Great wbsite and collection of photos too!
Excellent work

xemet
2005.11.03, 07:41 AM
The M24-Pro has now a micro-brushless motor.
Unfortunately it's impossible to mount a bigger motor, but this motor is very powerful. With the 14T pinion I go at 32 mph, but the motor have a lot of torque so I think I will mount a 16T or a 17T, with 17T I should reach about 43 mph

The brushless section on my website www.m24-pro.com shows pictures of the conversion.

Bye

xemet
2006.04.04, 06:26 AM
there is a guestbook now in my website, if there is someone who want to sign it, I will be very glad!

Thanks!

Manfredi

minittrackmann
2007.08.12, 01:46 AM
Great wbsite and collection of photos too!
Excellent work


oh my god.... That is such a nice car. how much do u think a kit will be?? i am so interested..:)