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Thread: Hakosuka GTR

  1. #11
    Join Date
    Feb 2020
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    This is going to be unbelievable. Can't wait to see it progress.

  2. #12
    Join Date
    Nov 2018
    Location
    Oulu, Finland
    Posts
    51

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    I'm back at this again and I have made some changes. The rear suspension setup is redone. There's now a separate tower where shock screws on and spring cups are attached to the rear frame. Rear floor and wheel arches are separate pieces. Servo location and linkages are next on the to do list. I'll hope I'll get to order some prints at the end of the year.



  3. #13
    Join Date
    Nov 2018
    Location
    Oulu, Finland
    Posts
    51

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    First parts printed and assembled, woohoo!




    And they even fit the body.




    Rest of the parts are ordered and I should get them next week or so. Time to start building this finally!

  4. #14
    Join Date
    Feb 2014
    Location
    Quebec, Canada
    Posts
    640

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    Wow I like that chassis layout, can't wait to see it take shape! How are you planning to build the front macpherson? Are you partially using some existing parts, and print hubs to put around an existing shock? The rear is very cool and legit too!

    Fred

  5. #15
    Join Date
    Aug 2014
    Location
    Smithfield, RI USA
    Posts
    2,461

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    Wow, nice job. I imagine it's taken a lot of time in front of the computer to get to this point...
    smallfactorystudio on instagram / lone wolf / doer of many things

  6. #16
    Join Date
    Nov 2018
    Location
    Oulu, Finland
    Posts
    51

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    Quote Originally Posted by Frederik View Post
    Wow I like that chassis layout, can't wait to see it take shape! How are you planning to build the front macpherson? Are you partially using some existing parts, and print hubs to put around an existing shock? The rear is very cool and legit too!

    Fred
    Thanks! I'm using Gmade RSD 67mm shocks which goes inside a 3d printed sleeve/steering block. Spring plates are also 3d printed. In the upper connection I'm using arm bushings and 6mm pivot balls from Xray F1 car. I'll post detail shots once I get around asembling.

  7. #17
    Join Date
    Nov 2018
    Location
    Oulu, Finland
    Posts
    51

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    Quote Originally Posted by Small Factory View Post
    Wow, nice job. I imagine it's taken a lot of time in front of the computer to get to this point...
    Thanks! It has taken time. Not sure how much but I should have spent a bit more before ordering parts. I got the rest of the 3d printed parts today and found out few flaws in my design. I had used stupid sized bearings in the differential and the transmission had a too small hole for one gear. They are not major flaws and I can get the parts to work but it is a bit annoying.

  8. #18
    Join Date
    Dec 2017
    Posts
    1,479

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    Very cool stuff, will be fascinating to see all the oily bits come together.

  9. #19
    Join Date
    Nov 2018
    Location
    Oulu, Finland
    Posts
    51

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    Quote Originally Posted by dagabba View Post
    Very cool stuff, will be fascinating to see all the oily bits come together.
    Thanks!

    I have put some parts together.





    There's few things that I'll need to address.

    -Rear suspension is super stiff. Need to get softer and/or shorter springs and lubricate the shocks to get them smoother or replace them with better ones.
    -Steering links hits the frame when front is compressed. Little filing should do it.
    -Steering bell crank collides with the transmission screws. Filing required.
    -No motor plate yet. First 3d printed test plate then aluminium one.
    -I messed up the front wheels while drilling the hole bigger for a flanged bearing. It's not centered anymore and wobbles. Either get a new pair or I'll design my own beadlock on road Watanabe wheels.
    -Chassis isn't rigid enough. I'll make a roll cage out of brass tubing. It should stiffen it up.

    I'll take more detailed shots of each main part of this build and show how everything is made and goes together. Perhaps even a video build series once everything is painted.

  10. #20
    Join Date
    Feb 2014
    Location
    Quebec, Canada
    Posts
    640

    Default

    Wow that's quite a bit of parts assembled!! Under chassis view looks awesome, really digging it. Were you able to test the front geometry even though you have a bit of mechanical interference to file? Toe and camber throughout steering, bump steer, caster etc, did you get it dialed-in pretty good the first time? I guess with the 3d software you were able to test some of those movements?

    It is cool that you found F1 parts to do the upper ball of the front MacPherson, that's also what I have found for my Escort. In my case I also used the part surrounding the ball, cutting off the remaining plastic and was left only with a small plastic receptacle that I had to somehow hold to the chassis at the top.

    Shocks from 1:18 Losi mini late model are very small and are a nice fit for scale 1:10 look. The springs are very soft and they have a threaded body so if it is a bit soft and the rear sags you can cheat with some more pre-load. In the pic they look just like regular 1:10 buggy shocks, but they are much smaller.


    http://www.losi.com/Products/Feature...rodID=LOSB1289


    It looks like it has a nice geometry going on, so if you do some video, I'd love to see the suspensions and steering moving!

    Fred

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