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#1 Jeff Muhlstock SOC

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Posted 09 October 2008 - 09:36 AM

I am looking for someone to build me a Rickshaw. Any advice??? Any info would be greatly appreciated, email me direct.

Thanks

Jeff
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#2 Andrey Yazydzhi

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Posted 09 October 2008 - 11:50 AM

I am looking for someone to build me a Rickshaw. Any advice??? Any info would be greatly appreciated, email me direct.

Thanks

Jeff


Jeff , I use this one .

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#3 Kareem La Vaullee

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Posted 09 October 2008 - 12:13 PM

Hi Andrey,

Did you made it yourself or had a grip make it for you ?

I would be interested in more pictures or even a list of parts as I am also in the market for a Rickshaw and think that it may be the best design (it looks a lot like Larry McConkey's rickshaw).

I was also wondering seeing my friend Chris' Handsfree if the vertical post would be better on the arm connection side instead of right in the middle.

Waiting for your replies and thoughts,

Thanks,

K.
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#4 Mike McGowan SOC

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Posted 09 October 2008 - 07:15 PM

Hi Andrey,

Did you made it yourself or had a grip make it for you ?

I would be interested in more pictures or even a list of parts as I am also in the market for a Rickshaw and think that it may be the best design (it looks a lot like Larry McConkey's rickshaw).

I was also wondering seeing my friend Chris' Handsfree if the vertical post would be better on the arm connection side instead of right in the middle.

Waiting for your replies and thoughts,

Thanks,

K.


Me too, that one looks sweet.
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#5 Kareem La Vaullee

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Posted 09 October 2008 - 07:40 PM

I am posting a picture of Larry's rickshaw for comparison.

Larry's one is a bit more elaborated but Andrey's is a good start.

Posted Image


K.
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#6 RonBaldwin

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Posted 09 October 2008 - 08:36 PM

I'm nearly done building one similar to Larry's -- I really like the idea of sitting at the same level as the garfield mnt no matter what height riser one uses. It works well, but I need better tires. I owe Larry many a beer for his innovations and insight over the years

I recently found out Larry is (or will be soon) selling his own design of rickshaws:

http://www.larryvision.net/id2.html

I would have gone with his if I had known when I started.
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#7 Alfeo Dixon SOC

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Posted 09 October 2008 - 09:21 PM

I use this one .

Larry's one is a bit more elaborated but Andrey's is a good start.

Posted Image


Off the back... I noticed also that Larry's sits below the center of the wheels more so the style of the Transport, keeping the CG low which would prevent an easy flip over the front end.

Andrey, I was very impressed on sight, but after reviewing the two, your's sits above the center of the wheels and could put you in a very easy face forward to the pavement. You have the weight of you and the rig all on the upper front end. A simple mod to get your force placed below the center would make that a bit more safer. I hope I did loose you on what I'm explaining?

-Alfeo "minored in physics"
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#8 Jess Haas SOC

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Posted 09 October 2008 - 09:51 PM

Most of the weight is still above the wheels so while it should have a minor effect I don't see it being that major. Am I missing something?

~Jess
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#9 Alfeo Dixon SOC

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Posted 09 October 2008 - 10:24 PM

Most of the weight is still above the wheels so while it should have a minor effect I don't see it being that major. Am I missing something?

~Jess


Absolutely your missing it... the weight of the rider add a downward force on the the wheels. Now if this force is below the center of the wheel, it hangs. If the force is above the wheel it rocks on top at a balancing point, just like on our rigs.

The force is below the wheels center on a hands free transport also... this is why one can stand on it with very little balancing adjustments. Go and try to stand on a ball... that's exactly what you doing on the other rickshaw which is essentially the closer to a wheel barrel.

Also on Larry's, I noticed and didn't mention that the force is also just behind the wheel adding to better precaution of not going over head first, which is probably the reasoning behind the third wheel. Also the lower profile now pulls the wheels down instead of pushing down on them (that gets a bit deeper, but deals with balance).

If one could truly center the force directly inline with the wheels (a la transport) then it becomes a lot easier to carry the load... think large heavy case on a mag liner... there is that point where you balance at and all the force is directly over the wheels, this hold true wether below or above the axel.

Hope that helps... gotta hit the bed for an early morning call

-Alfeo

Edited by Alfeo Dixon, 09 October 2008 - 10:34 PM.

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#10 Brant S. Fagan SOC

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Posted 10 October 2008 - 06:57 PM

Alfeo--

I feel I must mention that the attachment point of Larry's rickshaw seat, as you put it, "below the wheels," is incorrect in terms of how the CG is affected.

The "Larryvision" mass is still above the wheels because that's where he is sitting. Not below the wheels as you suggest.

To be below the wheels would be impossible in this dimension given Larry's current state of matter and energy.

If Scottie could send him through the transporter and remodulate the stream, he might just fit under the cart wheels and make it more stable.

Check your physics books.

Best,

Brant S. Fagan, SOC
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#11 Alfeo Dixon SOC

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Posted 10 October 2008 - 10:27 PM

Not quite. If you look back at my post, I said that Larry's sits below the axel (framing). Clearly both seats are about in the same position.

I noticed also that Larry's sits below the center of the wheels more so the style of the Transport, keeping the CG low which would prevent an easy flip over the front end.

Andrey, I was very impressed on sight, but after reviewing the two, your's sits above the center of the wheels

Correct, both masses are above the axel, but the displacement of force is what is key in the two designs.

Attached File  Andrey_s_Rickshaw.pdf   37.1KB   320 downloads
Attached File  Larry_s_Rickshaw.pdf   38.32KB   269 downloads
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#12 Andrey Yazydzhi

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Posted 11 October 2008 - 12:14 AM

Hi Andrey,

Did you made it yourself or had a grip make it for you ?

I would be interested in more pictures or even a list of parts as I am also in the market for a Rickshaw and think that it may be the best design (it looks a lot like Larry McConkey's rickshaw).

I was also wondering seeing my friend Chris' Handsfree if the vertical post would be better on the arm connection side instead of right in the middle.

Waiting for your replies and thoughts,

Thanks,

K.

Hi Kareem ,
I made it miself .
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#13 Andrey Yazydzhi

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Posted 11 October 2008 - 12:27 AM

Not quite. If you look back at my post, I said that Larry's sits below the axel (framing). Clearly both seats are about in the same position.

I noticed also that Larry's sits below the center of the wheels more so the style of the Transport, keeping the CG low which would prevent an easy flip over the front end.

Andrey, I was very impressed on sight, but after reviewing the two, your's sits above the center of the wheels

Correct, both masses are above the axel, but the displacement of force is what is key in the two designs.

Attached File  Andrey_s_Rickshaw.pdf   37.1KB   320 downloads
Attached File  Larry_s_Rickshaw.pdf   38.32KB   269 downloads

Alfeo Your analise is great but my sits is not above the center of the wheels ! The center of my mass and my rig mass is above the center of the wheels . And I can remove the wheel's center back or forvard to realise this.
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#14 Alfeo Dixon SOC

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Posted 11 October 2008 - 12:00 PM

Not quite. If you look back at my post, I said that Larry's sits below the axel (framing). Clearly both seats are about in the same position.

I noticed also that Larry's sits below the center of the wheels more so the style of the Transport, keeping the CG low which would prevent an easy flip over the front end.

Andrey, I was very impressed on sight, but after reviewing the two, your's sits above the center of the wheels

Correct, both masses are above the axel, but the displacement of force is what is key in the two designs.

Attached File  Andrey_s_Rickshaw.pdf   37.1KB   320 downloads
Attached File  Larry_s_Rickshaw.pdf   38.32KB   269 downloads

Alfeo Your analise is great but my sits is not above the center of the wheels ! The center of my mass and my rig mass is above the center of the wheels . And I can remove the wheel's center back or forvard to realise this.


Again, another misinterpretation of sits (structure/framing) for sits (body in a seated position). This was the original difference in the chassises I spoke of. Lets call it top slung (Andrey's) and underslung (Larry's).

In regards to the mass of you and your rig, they both apply force to your longest main pipe. The vertical pipe for rig mounting is attached to the very but then supported by the cross bar which should help displace the force of the rigs mass back over the axel, this I did over look. So your rickshaw should balance nicely still when decelerating without the added force on the front.
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#15 Katerina Kallergis

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Posted 22 April 2009 - 09:28 AM

I have someone building me a rickshaw and he had a question for me. I'm not sure if this matters but what size bicycle wheels does one use? He asked if they could be 20" or if they have to be 26".

Thanks,
Kat
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