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    Green Toaster's Car Sketches

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    • GaieusG Offline
      Gaieus
      last edited by

      This is getting really interesting and exciting!

      Gai...

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      • G Offline
        GreenToaster
        last edited by

        . . . I used to teach the class "Large Assembly Management" for PTC - that's coming in pretty handy for this project - same techniques, better software, ya know?

        Here, I'm finishing the shock towers . . . plus, the shocks are now no longer "mirrored" . . . and finally, I spun them around to hide the spring transitions that I'm going to fix later . . . I'll also will create some variable compression rate springs . . . I haven't figured out the cost estimate for this thing yet . . . (yawn) . . . I'm sleepy . . .


        bw_rock_crawler_013_02.jpg

        If you really want something you won't ever stop pursuing it.

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        • S Offline
          SchreiberBike
          last edited by

          @greentoaster said:

          . . . I was planning on using a turbo diesel to generator to four dc brushless motors - one at each wheel . . .

          I was wondering how you were going to get power to those wheels. I understand that some of the really really big dump trucks work that way. Also, there's potential for electric cars to have the motors in the hubs.

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          • G Offline
            GreenToaster
            last edited by

            @unknownuser said:

            Also, there's potential for electric cars to have the motors in the hubs.
            Volvo has one like that - this certainly wasn't an original idea. Perhaps other transportation manufacturers use the same drivetrain principle?

            I'm calculating ~15 degrees of front-to-back swing coupled with ~15 degrees of left-to-right side swing - add with this the ~22 degree range of up & down at each pivot center to end pod and also end pod to wheel = ~44 potential up/down swing at each end - thus the ball joints for the shocks. I had to use "slider" mounts on the swing arms to compensate for the parallel arms that will twist and change distance from each other. All movement of wheels is computer controlled, of course.

            Purpose: Remote search & rescue / search & destroy
            Range: 2 hours of operation w/diesel engines, 30 minutes on battery only (for stealth op's)
            Pods: 4 pods, each with video & 2 .50 cal machine guns (easily configurable w/variety of weapons)
            Speed: 72 kmh top speed, flat surface
            Est. delivery cost: ~$4.7M

            If you really want something you won't ever stop pursuing it.

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            • ely862meE Offline
              ely862me
              last edited by

              mr green what are u planning to do there an atomic bombb.... 😲 ..... 😍 so far so good, anyway how u gonna turn the weels i didnt see any axel there?

              Elisei (sketchupper)


              Before no life was done on Earth it was THE LIFE ITSELF...GOD
              Come and See EliseiDesign

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              • G Offline
                GreenToaster
                last edited by

                @unknownuser said:

                anyway how u gonna turn the weels i didnt see any axel there?
                There are two methods which can either work together or separately:

                [1] - pivot arms, which pivot the drive wheels a total of ~30 degrees

                [2] - drive wheels, which can operate much like a tractor (right side spin in reverse, left side spins forward - this combination makes the crawler turn right - all computer controlled)

                I'll set up the crawler and post some illustrations with the pivot range maxed out - what do they say, a picture is worth 999 words?

                If you really want something you won't ever stop pursuing it.

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                • G Offline
                  GreenToaster
                  last edited by

                  . . . like this . . . wheel turning capability = ~7.5 degrees in either direction at each pod . . . cnc w/separate motors eliminates need for differential, tranny, et cetera . . .


                  bw_rock_crawler_013_11.jpg


                  bw_rock_crawler_013_10.jpg

                  If you really want something you won't ever stop pursuing it.

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                  • G Offline
                    GreenToaster
                    last edited by

                    . . . revisiting the stitchy front end technique . . . this is another 6 minute quick sketch during class today . . . fun, fun, fun . . .

                    Happy Sketching,

                    Brad
                    πŸ˜„


                    bw_car_08623_01.JPG

                    If you really want something you won't ever stop pursuing it.

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                    • R Offline
                      remus
                      last edited by

                      that looks almost as if youve sawn the top of a box van and merged it with a sportscar πŸ˜›

                      http://remusrendering.wordpress.com/

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                      • G Offline
                        GreenToaster
                        last edited by

                        . . . I've gotta start taking more time with the roofs . . . this roof & glass is awful . . . I find it very helpful to use layers when modeling new parts that intersect with others . . .


                        bw_car_08623_02.JPG

                        If you really want something you won't ever stop pursuing it.

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                        • G Offline
                          GreenToaster
                          last edited by

                          . . . another not so good roof . . . it really must be frustrating for those who are really good with this stuff to see my slow progress . . . oh well . . .


                          bw_car_08623_03.JPG

                          If you really want something you won't ever stop pursuing it.

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                          • G Offline
                            GreenToaster
                            last edited by

                            . . . this was really funny - I changed my construction technique a little and tried some new stuff but didn't model around the wheels & tires - when I put these in later (after cutting the wheel wells), the result was humorous as the wheels & tires are way small . . . of course, this is not big deal to fix, but it emphasizes the importance of proportion . . . I guess . . . without specific details (hood lines, & so forth), sometimes the "pre-smoothed" version looks best . . . there's something about that raw, chiseled look that I like sometimes as in the bottom pic . . .

                            Happy Sketching,

                            Brad
                            πŸ˜„


                            bw_car_088_01.JPG


                            bw_car_088_02.JPG


                            bw_car_088_03.JPG

                            If you really want something you won't ever stop pursuing it.

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                            • G Offline
                              GreenToaster
                              last edited by

                              . . . one of my least favorite vehhicles is the "mini van" . . . 😞 . . . so, of course, I sketched one up super-quick . . . lots of missing details . . . models as ugly as this don't make you think twice when deleting them . . . on to the next one . . .


                              bw_car_08626_01.jpg

                              If you really want something you won't ever stop pursuing it.

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                              • C Offline
                                CADken
                                last edited by

                                it has a lot to do with faces and such... I model cars in 3Ds Max and it's no picnic there either... here is what I do in 3Ds Max that you can apply to SU:

                                1. Use Blueprints to Model from.

                                http://i90.photobucket.com/albums/k242/KensNikonL3/3DBox2.jpg

                                1. Create faces and move the vertex of each corner to match the blueprints.

                                http://i90.photobucket.com/albums/k242/KensNikonL3/tegger-hood.jpg

                                http://i90.photobucket.com/albums/k242/KensNikonL3/tegger-front-bumper50.jpg

                                http://i90.photobucket.com/albums/k242/KensNikonL3/screenshot-wire.gif

                                http://i90.photobucket.com/albums/k242/KensNikonL3/tegger-60body.jpg

                                http://i90.photobucket.com/albums/k242/KensNikonL3/tegger-80frontside.jpg

                                It sounds simple and 3Ds Max is great for car modeling, but I'm sure some advance SU users can do this in their sleep...

                                btw, your model is looking good so far!

                                "it seems like everything I do is a work in progress..."

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                                • G Offline
                                  GreenToaster
                                  last edited by

                                  CADken - thanks very much for your contribution - fabulous!!! I'll try that technique - the only orthographic views I found were of an Audi which were used in a Rhino tutorial.

                                  Is there a great source for finding a bunch of 3 views of cars?

                                  Thanks for your comment - I'm trying, it's frustrating & fun at the same time. My progress is slow . . . posts like yours are very encouraging - this keeps me going and teaches me how to do it the right way - that's cool.

                                  Happy Sketching,

                                  Brad

                                  If you really want something you won't ever stop pursuing it.

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                                  • C Offline
                                    CADken
                                    last edited by

                                    @greentoaster said:

                                    CADken - thanks very much for your contribution - fabulous!!! I'll try that technique - the only orthographic views I found were of an Audi which were used in a Rhino tutorial.

                                    Is there a great source for finding a bunch of 3 views of cars?

                                    Thanks for your comment - I'm trying, it's frustrating & fun at the same time. My progress is slow . . . posts like yours are very encouraging - this keeps me going and teaches me how to do it the right way - that's cool.

                                    Happy Sketching,

                                    Brad

                                    in my travels: http://www.smcars.net/ and http://www.the-blueprints.com/

                                    these are two sites dedicated to modeling cars and anything for that matter with blueprints... they both have great databases for car blueprints... i have a few Acura car blueprints handy, as well as a few Honda blueprints.

                                    "it seems like everything I do is a work in progress..."

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                                    • G Offline
                                      GreenToaster
                                      last edited by

                                      . . . I haven't taken time to try the method with the 3 views - just wanted to finish the body of this car . . . will finish the roof later . . .


                                      bw_car_08627_01.jpg

                                      If you really want something you won't ever stop pursuing it.

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                                      • ely862meE Offline
                                        ely862me
                                        last edited by

                                        it s easyer to make ur own cars,i build 3 models with blueprints the ferrari mythos,vw scirocco and the fiat stylo,they go greatbut u need more skills,that doesn t mean that u can t build something nice

                                        Elisei (sketchupper)


                                        Before no life was done on Earth it was THE LIFE ITSELF...GOD
                                        Come and See EliseiDesign

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                                        • G Offline
                                          GreenToaster
                                          last edited by

                                          @unknownuser said:

                                          they go greatbut u need more skills,that doesn t mean that u can t build something nice
                                          Yes but my car modeling technique thus far hasn't resulted in anything very impressive. I think I might learn something new which could help - one 3 view won't hurt - the distraction might be helpful.

                                          If you really want something you won't ever stop pursuing it.

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                                          • G Offline
                                            GreenToaster
                                            last edited by

                                            So, a student doubts I can draw a car in five minutes . . . so, of course, I take the challenge . . . this is literally a five minute car . . . excluding wheels & tires . . .


                                            bw_car_08630_01.jpg

                                            If you really want something you won't ever stop pursuing it.

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