Tue Jan 05, 2010 12:54 pm

Hooked
mp3 250 "Windy"
Joined: 23 Jan 2008
Posts: 492
Location: Seattle WA
 
Hooked
mp3 250 "Windy"
Joined: 23 Jan 2008
Posts: 492
Location: Seattle WA
Tue Jan 05, 2010 12:54 pm linkquote
NathanielSalzman wrote:
I doubt I'll use a radial brake rotor like that, however. I'm not interested in having to custom machine a wear-out part like a brake rotor.
But the radial rotor is so desperately cool! 

Jest aside, are scooter-size rotors that much shorter lived than car brake rotors?  Would it be too expensive or time consuming to machine a batch of six or so and call it a lifetime supply?
Tue Jan 05, 2010 12:56 pm

Hooked
Vespa GT 200L
Joined: 21 Mar 2008
Posts: 111
Location: St. Paul, MN
 
Hooked
Vespa GT 200L
Joined: 21 Mar 2008
Posts: 111
Location: St. Paul, MN
Tue Jan 05, 2010 12:56 pm linkquote
That's a good point. although I'm already likely to have to machine the rear rotor. I'm trying to cut down on as much custom engineering as I can.

I'll be machining gear teeth into the rear brake rotor so that I can fire a starter solenoid in there to engage those teeth and be "reverse" for the vehicle. It'd be nice to just be able to use all stock brakes otherwise. Stock pads, stock calipers, stock master cylinders and only have to run custom lines.
Tue Jan 05, 2010 1:59 pm

Addicted
Joined: 27 Jan 2008
Posts: 921
Location: Linnville, TX
 
Addicted
Joined: 27 Jan 2008
Posts: 921
Location: Linnville, TX
Tue Jan 05, 2010 1:59 pm linkquote
NathanielSalzman wrote:
I'll be machining gear teeth into the rear brake rotor so that I can fire a starter solenoid in there to engage those teeth and be "reverse" for the vehicle. It'd be nice to just be able to use all stock brakes otherwise. Stock pads, stock calipers, stock master cylinders and only have to run custom lines.
Yikes. I don't know if that is the best way to do reverse. I would be nervous about messing with the brake rotor like that. If your reverse mechanism fails, you might lose your rear braking ability or jam the rear wheel.

I like the friction drive system or you could add a fourth wheel. Make it a small one that you can deploy that only does reverse. It would be like a friction drive, but would drop to the ground rather than the rear wheel. I don't think that it would push you up a hill backwards, but it might back you out of a parking spot.
Tue Jan 05, 2010 2:02 pm

Hooked
Vespa GT 200L
Joined: 21 Mar 2008
Posts: 111
Location: St. Paul, MN
 
Hooked
Vespa GT 200L
Joined: 21 Mar 2008
Posts: 111
Location: St. Paul, MN
Tue Jan 05, 2010 2:02 pm linkquote
It's hardly my final thought on the matter, but I'm not worried about it. When was the last time your starter randomly interacted with your flywheel? It's the exact same mechanism. The main advantage is that unlike a friction drive, it doesn't need a bracket to push that motor on and off the wheel. It'd be a setup with basically just two moving parts and solid-mounted to the rear swing arm. It'd add a touch of unsprung weight, but so would a friction drive, if not more with all its bracketry and such.
Tue Jan 05, 2010 2:25 pm

Hooked
More than one should have.
Joined: 02 May 2007
Posts: 477
Location: Willits California
 
Hooked
More than one should have.
Joined: 02 May 2007
Posts: 477
Location: Willits California
Tue Jan 05, 2010 2:25 pm linkquote
I have a Zoe Zipper three wheeled micro car. It uses a small electric motor that turns a friction wheel agaist the rear tire. It works OK. But; backing more than a few feet is not feasible.

I plan on doing this if I can't find something with reverse built in.

I've been considering a large cc ATV, most have reverse built in.
Tue Jan 05, 2010 2:27 pm

Hooked
Vespa GT 200L
Joined: 21 Mar 2008
Posts: 111
Location: St. Paul, MN
 
Hooked
Vespa GT 200L
Joined: 21 Mar 2008
Posts: 111
Location: St. Paul, MN
Tue Jan 05, 2010 2:27 pm linkquote
Quote:
I've been considering a large cc ATV, most have reverse built in.
Future projects along this line will likely utilize ATV drivetrain, but that just isn't the right fit for this particular vehicle.
Tue Jan 05, 2010 2:35 pm

Molto Verboso
'66 Sears Allstate 788.94370 '65 Vespa V9A1T
Joined: 20 Oct 2008
Posts: 1236
Location: Roseville, MI
 
Molto Verboso
'66 Sears Allstate 788.94370 '65 Vespa V9A1T
Joined: 20 Oct 2008
Posts: 1236
Location: Roseville, MI
Tue Jan 05, 2010 2:35 pm linkquote
Re: Awe yes
NathanielSalzman wrote:
erich51 wrote:
Let the rear tire and MP3 500cc enging do it all. Rear wheel drive is the best thing and in that way you can fool around with the front suspension all you want. I just saw your drawing and good luck on doing you project.
Thanks! Yeah, that's the plan. Right now I'm leaning toward the Suzuki Burgman, but the MP3/BV-500 motor is on my radar as well.
the can-am spyder could provide some parts and ideas as well.

http://www.sybarites.org/wp-content/uploads/2008/04/left.jpg

it has reverse, so it might be a perfect platform.
Tue Jan 05, 2010 2:51 pm

Hooked
Vespa GT 200L
Joined: 21 Mar 2008
Posts: 111
Location: St. Paul, MN
 
Hooked
Vespa GT 200L
Joined: 21 Mar 2008
Posts: 111
Location: St. Paul, MN
Tue Jan 05, 2010 2:51 pm linkquote
Quote:
the can-am spyder could provide some parts and ideas as well.
It's an interesting machine, but from both a price and a component standpoint, the Can Am isn't a good fit for what I'm specifically doing. Although creating a vehicle similar to what I'm designing from that trike would be possible if you had the cash. If you read my project specifications, I think you'll understand better what I mean:

http://www.projectstreetliner.com/introduction/
Wed Jan 06, 2010 5:07 am

Addicted
Joined: 27 Jan 2008
Posts: 921
Location: Linnville, TX
 
Addicted
Joined: 27 Jan 2008
Posts: 921
Location: Linnville, TX
Wed Jan 06, 2010 5:07 am linkquote
NathanielSalzman wrote:
When was the last time your starter randomly interacted with your flywheel?
The last time I started a vehicle, the flywheel wasn't a brake rotor.

I don't think that you mean to use "random" to describe the interaction. I think that you mean adversely interacted. Flywheel to starter interactions can cause damage, usually to the starter.

You seem confident, so go for it.
Wed Jan 06, 2010 6:10 am

Hooked
Vespa GT 200L
Joined: 21 Mar 2008
Posts: 111
Location: St. Paul, MN
 
Hooked
Vespa GT 200L
Joined: 21 Mar 2008
Posts: 111
Location: St. Paul, MN
Wed Jan 06, 2010 6:10 am linkquote
It'd definitely require some precision alignment, but it's my favorite method so far. I haven't spent a lot of time and focus on solving that problem just yet and friction drive is definitely still an option. The starter motor just seems very elegant.
⬆️    About 2 months elapsed between posts    ⬇️
Sun Feb 28, 2010 10:47 am

Hooked
Vespa GT 200L
Joined: 21 Mar 2008
Posts: 111
Location: St. Paul, MN
 
Hooked
Vespa GT 200L
Joined: 21 Mar 2008
Posts: 111
Location: St. Paul, MN
Sun Feb 28, 2010 10:47 am linkquote
Project Update:

Things are coming along well. I'm starting on my first small scale prototype today, but what may be of more interest to you folks is some of the more recent design decisions about the overall shape and proportion of the vehicle. I'm having a great time with it and would love to get feedback or ideas on the design so far.



As always, more info available at http://www.projectstreetliner.com
Wed Mar 03, 2010 11:43 pm

Molto Verboso
GT60
Joined: 26 Aug 2007
Posts: 1381
Location: Fraser Valley, BC
 
Molto Verboso
GT60
Joined: 26 Aug 2007
Posts: 1381
Location: Fraser Valley, BC
Thu Mar 04, 2010 6:36 am

Hooked
2009 Piaggio Fly 50 2009 Piaggio Fly 150
Joined: 09 Sep 2009
Posts: 292
Location: Alpha, Georgia
 
Hooked
2009 Piaggio Fly 50 2009 Piaggio Fly 150
Joined: 09 Sep 2009
Posts: 292
Location: Alpha, Georgia
Thu Mar 04, 2010 6:36 am linkquote
Hmm, that is pretty interesting..
Thu Mar 04, 2010 6:37 am

Hooked
2009 Piaggio Fly 50 2009 Piaggio Fly 150
Joined: 09 Sep 2009
Posts: 292
Location: Alpha, Georgia
 
Hooked
2009 Piaggio Fly 50 2009 Piaggio Fly 150
Joined: 09 Sep 2009
Posts: 292
Location: Alpha, Georgia
Thu Mar 04, 2010 6:37 am linkquote
NathanielSalzman wrote:
Project Update:

Things are coming along well. I'm starting on my first small scale prototype today, but what may be of more interest to you folks is some of the more recent design decisions about the overall shape and proportion of the vehicle. I'm having a great time with it and would love to get feedback or ideas on the design so far.



As always, more info available at http://www.projectstreetliner.com
How big is that exactly? Can you put a human next to the image so we can see it to scale? And it's looking good man..
Thu Mar 04, 2010 9:42 am

Molto Verboso
LX150 Darling Plum; GTS 250 Dragon Red; Honda Big Ruckus Demented Bastard
Joined: 03 Aug 2008
Posts: 1387
Location: Sacramento, Ca.
 
Molto Verboso
LX150 Darling Plum; GTS 250 Dragon Red; Honda Big Ruckus Demented Bastard
Joined: 03 Aug 2008
Posts: 1387
Location: Sacramento, Ca.
Thu Mar 04, 2010 9:42 am linkquote
Hey NathanielSalzman
This sounds like a great idea, and I really hope you are successful at building and enjoying your streetliner someday. Since you are trying to avoid the engineering, you may want to check out what MotherEarthNews did years ago. They designed a 3VG that did just what your talking about, it just does not look as slick as your streetliner design. I am sure you could still get the plans from them with the dimentions and sources that you might be able to use. I think the canopy idea they had would work great for your concept. It slid back like that of a jet fighter. They also had a cantaleavered front suspention that most of todays 3 wheeled tilting vehicles used. The whole thing was designed for the DIYer to be able to do or have parts of it done.



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