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 Posted 10/17/2018 5:06:32 PM |
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Junior Member
 
Last Login: 7/15/2021 8:35:20 AM
Posts: 63,
Visits: 271
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Hi Everyone-
I'm planning my Batpod build (still in the CAD stages now, though I can't help but start to shop around for parts) and I have a general question about the rear end. I'm not "hung up" on it, and since I don't think these pieces are vital, I have a hard time convincing my engineer's brain to add pieces to the bike just to make it look more technical.
On the rear subframe, there are two dampers and two blocks of extruded aluminum fixed to the square stock that help support the rear axle. I was guessing that these are dampers, though they could be linear actuators. I noticed that these are present on both the movie props (with a radiator behind the left foot floorboard) and most replicas I've seen (which do not use an additional radiator here). Though, having the floorboard mounted radiator solves my current issue of solely using a VT750 radiator mounted horizontally for filling purposes, and helps explain the multiple large radiator hoses that can be seen zip-tied to the frame itself.
I'll save the radiator question for another day, but for now, does anyone know what these pieces are for? I thought, maybe the extruded aluminum on the axle could be a housing for a wheel speed sensor? Likewise, the aluminum on the swingarm itself could house a fitting for the floorboard-mounted radiator.
Any help would be greatly appreciated!
Thanks-
-Adam
-Waz
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| Posted 10/18/2018 12:13:40 AM |
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Forum Guru
Last Login: 10/10/2023 2:34:08 PM
Posts: 506,
Visits: 8,329
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They do absolutely nothing..... dont even need them as is evident in the first picture.
Here's mine. Made of pipe and plastic.
I refer to parts like this a movie prop garnish.
Brad.
www.spidey4fun.com
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| Posted 10/18/2018 12:29:10 AM |
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Junior Member
Last Login: 7/15/2021 8:35:20 AM
Posts: 63,
Visits: 271
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Thanks!
And double-thanks for not giving me a nerdy explanation! Although, part of me can imagine how convenient they would be if they were linear actuators that subtly pivoted the rear axle to make the turning radius a bit smaller... it would certainly make maneuvering the project around the garage easier!
Since I originally posted my question, I read through a lot of your comments and your build log... really great work! It's really interesting to see how your project came together!
Thank you for sharing your work with everyone!
-Adam
-Waz
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| Posted 10/19/2018 12:43:45 AM |
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Junior Member
Last Login: 7/15/2021 8:35:20 AM
Posts: 63,
Visits: 271
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Since seeing your pictures... I have re-thought the way I was going to do my rear axle...
Instead of hacking up the Honda TRX450ER rear axle, I want to use 3/4" steel and generic taper roller bearings, similar to the trailer spindle for the front swingarm joint.
But, the rear axle is proving to be trickier than the front!
Am I correct to assume that you're using a two-piece rear axle, connected at the wheel?
This is what I interpreted your pictures as... I still have a lot of thinking to do on how to connect the rear sprocket and make it so tightening the axle won't create more stress on the axle than necessary. And, obviously, my frame section shouldn't have two bearings, but until I figure everything else out, I'm not sure where I should mount things.
P.S. Sorry for the low-resolution images... my CAD machine doesn't have access to CLTC.
P.P.S. Lime Green are the anticipated weld beads. Blue is the wheel hub... don't worry about the brakes for now!
-Waz
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| Posted 10/19/2018 2:17:41 AM |
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Forum Guru
Last Login: 10/10/2023 2:34:08 PM
Posts: 506,
Visits: 8,329
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Mines a bit different. Electric motor. The motor shaft doesn't rotate, just needed to be fixed in.
www.spidey4fun.com
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| Posted 10/19/2018 4:03:32 AM |
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Forum Guru
Last Login: 10/10/2023 2:34:08 PM
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Visits: 8,329
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| Posted 10/19/2018 8:01:54 AM |
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Junior Member
Last Login: 7/15/2021 8:35:20 AM
Posts: 63,
Visits: 271
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OH MAN!
That's amazing- Hubbed electric motor will solve so many little issues with the overall design, but you seem to be really on top of your game either way!
Thanks again for sharing pictures of your build- Is there a good way we can keep up to date with what you're working on?
Thanks for the help-
-Adam
-Waz
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| Posted 10/19/2018 9:56:01 AM |
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Supreme Being
Last Login: 4/6/2024 5:28:59 PM
Posts: 1,684,
Visits: 5,334
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| I have to say, that electric motor concept is pure genius.
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| Posted 10/19/2018 4:52:36 PM |
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Junior Member
Last Login: 7/15/2021 8:35:20 AM
Posts: 63,
Visits: 271
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Yeah... just think about how much simpler the design is mechanically!
You can eliminate all these things:
-4 jackshafts to reroute chains through the frame (and all the vibration those will cause)
-chain tensioners
-electronic/air shifter
-clutch
And, I'm sure the amount of space you have for battery is going to give you nearly the same "mileage" as the ~1.5 gallon tank that fits in the same location.
Really excited to see the progress being made!
-Waz
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| Posted 10/20/2018 6:33:43 PM |
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Has NO LIFE!!
Last Login: 12/4/2023 11:08:55 PM
Posts: 3,232,
Visits: 5,166
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Hey WAERZENGINEER,
Welcome to the build logs.
Great to see a new Bat vehicle (Bat Pod) builder join the site.
Good luck on your build. vertigo
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