TheGarfather 105 Posted October 10, 2020 So, decided to build a 1/10 rally car with a center differential and belts instead of shaft. Did some thinking and drawing and ended up with this. Based on a Xray XB4 high volume differential. Put the diff case in the lathe and removed the bottom. Made a new out of 6082-T6 aluminum. Used a diff cross pin from Xray X1 so the bevel gear axle could run through the differential. The concept worked. 😁 9 Share this post Link to post Share on other sites
TheGarfather 105 Posted October 10, 2020 So after some more thinking and drawing I realized I had to make a new and longer endplate for the differential. Same material as before. Two 10x15x4 bearings that supports the secondary outdrives that has two 5x8x2.5 bearings supporting the primary outdrives, a 5mm shaft I made out of 7075-T5 aluminum. 7 Share this post Link to post Share on other sites
TheGarfather 105 Posted October 10, 2020 All the parts for the differential. 8 Share this post Link to post Share on other sites
TwistedxSlayer 1290 Posted October 10, 2020 OK, I'm very interested. 1 Share this post Link to post Share on other sites
TheGarfather 105 Posted October 10, 2020 The layout. Using my TA06 Pro as a donor car. Was hoping to use TRF503 steering but ended up with crazy bump steer. Going to make new one and use the TA06 steering with XV01 arms and hubs. The plan is to use shorty packs and hopefully be able to change the layout from front/center to rear/center layout depending on grip. 9 Share this post Link to post Share on other sites
ruebiracer 1024 Posted October 10, 2020 Totally cool mod, and very nice designed. Can only guess how many hours you spent from the idea to the first built in! 1 1 Share this post Link to post Share on other sites
ChrisRx718 4464 Posted October 10, 2020 Interesting approach! As a rally car are you going to try to enclose the belt-drive? I'm also intrigued how the belt will serve the front diff, looks like quite a tight angle to get over the motor can? 2 Share this post Link to post Share on other sites
Seanster43 222 Posted October 10, 2020 I’m hooked can’t wait to see the progress! 1 Share this post Link to post Share on other sites
Grotty Otty 868 Posted October 10, 2020 This is great, will be following with interest. 1 Share this post Link to post Share on other sites
TheGarfather 105 Posted October 16, 2020 On 10/10/2020 at 8:20 PM, ruebiracer said: Totally cool mod, and very nice designed. Can only guess how many hours you spent from the idea to the first built in! Try years. Always felt that these small cars was missing a center differential. But with a shaft drive line the chassis can be prone to torque twist, so with a belt and a transverse motor should do the trick. And it's not until now when I got a new job about a year ago that I can actually make this car. I work for a company that makes fighter jets among other things. The equipment and machinery I have at my disposal is beyond anything I've ever dreamed about 😊 5 Share this post Link to post Share on other sites
TheGarfather 105 Posted October 16, 2020 On 10/10/2020 at 8:49 PM, ChrisRx718 said: Interesting approach! As a rally car are you going to try to enclose the belt-drive? I'm also intrigued how the belt will serve the front diff, looks like quite a tight angle to get over the motor can? I will try to make it as sealed as possible. An inner shell is the most likely solution. Depending on the setup, the belt will go over the motor to the front/rear with the help of some pulleys. 👍 Share this post Link to post Share on other sites
TheGarfather 105 Posted October 16, 2020 The steering is sorted. 👌 5 Share this post Link to post Share on other sites
TheGarfather 105 Posted October 20, 2020 Made some pulleys from nylon. More pictures coming tonight 4 Share this post Link to post Share on other sites
TheGarfather 105 Posted October 20, 2020 Steering is done and so is the differential mount. 8 1 Share this post Link to post Share on other sites
Carmine A 2046 Posted October 22, 2020 As a Fabricator and Scratchbuilder myself, I'm VERY intrigued!! I'll definitely be watching. 👌 1 Share this post Link to post Share on other sites
SupraChrgd82 1425 Posted October 22, 2020 A center diff with both outputs on the same side??? Wow! Share this post Link to post Share on other sites
TheGarfather 105 Posted November 18, 2020 First batch of belts came. So cool to be able to just make a phone call and order the belts you need for a fraction of the price Tamiya or any other brands charge and have them delivered 2 days later 👌 Only problem is that I ordered too short rear belt 😑😑😑 4 Share this post Link to post Share on other sites
TheGarfather 105 Posted December 21, 2020 Since I'm lazy and a very big project at work is eating my time nothing much have happened. Rear belt with one of the rollers is in place. Just two more to fabricate and mount somehow. 🙄 2 Share this post Link to post Share on other sites
TheGarfather 105 Posted December 21, 2020 On 10/22/2020 at 5:30 AM, SupraChrgd82 said: A center diff with both outputs on the same side??? Wow! Exactly! Share this post Link to post Share on other sites
TheGarfather 105 Posted February 15, 2021 Made a motor mount today. 2 Share this post Link to post Share on other sites
ThunderDragonCy 7779 Posted February 17, 2021 Loving this build. 1 Share this post Link to post Share on other sites
TheGarfather 105 Posted February 18, 2021 Moving the servo to the Center of the car requires a new part for the steering. And since I can't buy what I need, I had to make one 🙃 New on the 👈 Old on the 👉 1 Share this post Link to post Share on other sites