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| < Classifieds ~ lambretta frame |
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 Posted:
Sat Feb 11, 2006 1:33 am
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Training
Joined: 01 Dec 2005
Posts: 28
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| lookin for a wicked cheap lambretta frame. i plan on cutting it up and someday hope to have something i can take to the salt flats. |
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Sat Feb 11, 2006 2:48 am
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Noob
Joined: 18 Jan 2006
Posts: 6
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Sat Feb 11, 2006 5:03 am
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Licensed
Joined: 23 Jan 2005
Posts: 300
Location: NE Minneapolis
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| n8murphy wrote: | | hope to have something i can take to the salt flats. |
Worlds Fastest Lambretta? |
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Sat Feb 11, 2006 9:31 am
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Training
Joined: 01 Dec 2005
Posts: 28
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| i figure it will work better for this purpose thsn a vespa would. there is less to cut off |
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| Posted:
Sat Feb 11, 2006 9:33 am
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Training
Joined: 01 Dec 2005
Posts: 28
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| why you takin my words ya bastard |
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Sat Feb 11, 2006 11:39 am
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Licensed
Joined: 19 Jan 2005
Posts: 1323
Location: MPLS
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| The flatest black Lambretta |
_________________
-Matt
-++-you can't spell jackass with out JKSC-++- |
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| Posted:
Mon Feb 13, 2006 2:20 am
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Licensed
Joined: 06 May 2005
Posts: 215
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email creepimpls /at/ hotmail d0t com
His name is carlin and he has an LI frame for sale, I think |
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| Posted:
Mon Feb 13, 2006 8:56 am
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Licensed
Joined: 19 Jan 2005
Posts: 576
Location: St. Paul
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| What kind of speed are you looking for, 100 mph plus? |
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Brad |
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Mon Feb 13, 2006 10:55 pm
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Licensed
Joined: 28 Jun 2005
Posts: 812
Location: St. Paul MN USA
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Probably as his ride goes about 80 or so as it is. :-)
Dave |
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Tue Feb 14, 2006 1:58 pm
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Licensed
Joined: 19 Jan 2005
Posts: 576
Location: St. Paul
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| Any math majors here? So how rpms does a 10" wheel turn at 80 mph? : ) |
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Brad |
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| Posted:
Tue Feb 14, 2006 2:20 pm
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Licensed
Joined: 19 Jan 2005
Posts: 1323
Location: MPLS
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| dmarquis wrote: | | Probably as his ride goes about 80 or so as it is. |
Postal Jeeps can go that fast??? |
_________________
-Matt
-++-you can't spell jackass with out JKSC-++- |
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| Posted:
Tue Feb 14, 2006 10:28 pm
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Licensed
Joined: 28 Jun 2005
Posts: 812
Location: St. Paul MN USA
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Don't know how many RPMS they are spinning at 80 MPH, but he did pretty much show up a guy on a crotch rocket thou on the hennipen bridge. I was doing about 50 or so and they way, way ahead........ Robert was there. Crazy stuff! Nate, must got a nitro setup in there... :-)
Dave |
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| Posted:
Wed Feb 15, 2006 12:09 pm
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Licensed
Joined: 19 Jan 2005
Posts: 587
Location: Best Saint Paul
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3.14 * 10 = 31.4 " around
80 mph in inches per minute is 84400
84400/31.4 = 2690 rpm
I don't know what gearing he's running, so you'd have to deal with that before you could figure out engine RPM. |
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| Posted:
Wed Feb 15, 2006 1:36 pm
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Joined: 06 May 2005
Posts: 215
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| nate wrote: | 3.14 * 10 = 31.4 " around
80 mph in inches per minute is 84400
84400/31.4 = 2690 rpm
I don't know what gearing he's running, so you'd have to deal with that before you could figure out engine RPM. |
3.14 * 10? is it running on rims?
80 mph would be about 7.5K assuming stock gearing and no loss at the wheel. To hit 100 a bikes gott have about 35+ ponies (where one can probably hit 80 with about 15-16 hp). Low weight helps but cutting air is a bitch. |
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| Posted:
Wed Feb 15, 2006 1:47 pm
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Licensed
Joined: 18 Jun 2005
Posts: 704
Location: Longfellow, Minneapolis
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| nate wrote: | 3.14 * 10 = 31.4 " around
80 mph in inches per minute is 84400
84400/31.4 = 2690 rpm
I don't know what gearing he's running, so you'd have to deal with that before you could figure out engine RPM. |
Ummm, no, your math's not quite right. The *wheel* has a 10" diameter, not the outside of the tire. I'm guessing the rolling surface is more like a 16" diameter and 16*3.14 ~= 50 and 84400/50 is a much saner 1688 rpm. The standard Stella's fourth gear has a 5.39:1 final ratio, which means 9100 RPMs for a standard Stella at 80MPH with a 21/68 primaries assuming my estimate of approx. 16" across the tire is correct. A fireball, with a 23/66 primary set would yield a 4.7 final drive in fourth (by my math), which means a still saner 7900 RPMs at 16" across the tire.
So 80MPH, while difficult for a 150, shouldn't be impossible. And since you're talking lammys, you get a few extra ccs to boot.
If anybody knows what the actual outside diameter of a 10" scooter tire is, please provide info! |
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Just say hello to dmarquis. |
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