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Author Topic: Lay down motorcycle in A-G class  (Read 14314 times)

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Offline Unkl Ian

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Re: Lay down motorcycle in A-G class
« Reply #15 on: August 04, 2011, 08:37:47 PM »
Quote from: Nortonist 592 on August 04, 2011, 02:56:53 PM
Mine is a sidecar so commenting on how a solo would handle is something I can't do.


Bill: Have you considered removing the side car,
and installing a larger front wheel ?

Motorcycle Streamliner rules specify a minimum tilt angle.
But it is not specified in Open or partial Streamlined motorcycle.

So it appears yours would be legal.

 
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Offline Nortonist 592

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Re: Lay down motorcycle in A-G class
« Reply #16 on: August 04, 2011, 09:06:12 PM »
I haven't really considered it as it was purpose built as a sidecar.  The sidecar is welded on.  The rules may not specify a lean angle for A and M solos but I only have about 1" of ground clearance as it stands.  The frame is wide and the lean angle is not much.  To raise the frame would involve cutting of the rear wheel mounting and manufacturing a new one which I have to admit I have little enthusiasm for doing.  The front could be raised fairly easily but the rear would be a headache.

There was a solo at the June El Mirage meet (no. 980 I think) which is a laydown.  It passed tech and ran.  But from what I've heard it didn't want to handle too good.  I had a look at it when it was in tech.  Very interesting but I wasn't crazy about the steering set up.  And the front tire had very sharp edges (for the want of a better way to explain it).  I had the feeling that if you were to try and turn it you woud get up on the edge and mess things up.  There is a photo of it on the SCTA site.  They've changed the bike photos to some cockamamie slide show.  Can't download it for here.  But its worth a look.
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Offline Unkl Ian

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Re: Lay down motorcycle in A-G class
« Reply #17 on: August 04, 2011, 10:18:16 PM »
« Last Edit: August 04, 2011, 10:21:14 PM by Unkl Ian »
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Offline Unkl Ian

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Re: Lay down motorcycle in A-G class
« Reply #18 on: August 04, 2011, 10:23:16 PM »
Quote from: Nortonist 592 on August 04, 2011, 09:06:12 PM
Very interesting but I wasn't crazy about the steering set up. 


Bill:  How did his steering, compare with
your original steering that didn't pass inspection ?
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Offline bak189

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Re: Lay down motorcycle in A-G class
« Reply #19 on: August 04, 2011, 10:26:49 PM »
Now WHY would anybody want to remove a sidecar and make a solo bike...................

2 wheels is not enough.........4 wheels is to many.......3 wheels is just right........................................
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Offline Glen

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Re: Lay down motorcycle in A-G class
« Reply #20 on: August 04, 2011, 10:33:46 PM »
He would need to add a kick stand. :roll:
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Offline Richie

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Re: Lay down motorcycle in A-G class
« Reply #21 on: August 04, 2011, 10:58:55 PM »
keep us posted on your progress , i have been working on something similar... only was planning on incapsulating the rider in a tubing structure, built a mock up piece to get the shape of the body and to see if i could fit it in something that size
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Offline Nortonist 592

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Re: Lay down motorcycle in A-G class
« Reply #22 on: August 05, 2011, 12:47:51 AM »
Quote from: Unkl Ian on August 04, 2011, 10:23:16 PM
Quote from: Nortonist 592 on August 04, 2011, 09:06:12 PM
Very interesting but I wasn't crazy about the steering set up. 


Bill:  How did his steering, compare with
your original steering that didn't pass inspection ?

Originally my steering was a T set up (see photo) which was fine until I added the bracing.  When I added the bracing Tom felt if I went upside down my legs would be trapped.  Hence the under my knees handlebars.  His steering setup allowed unrestricted entry and exit which is where I fell afoul of the inspectors.  I have a tendency to overbuild and without being in front of the machine I can't explain it.  He passed inspection so what do I know?  Were it my machine (and I wouldn't mind having it in the garage) I would do the front end differently.

By weslake at 2007-06-15
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Offline DaveB

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Re: Lay down motorcycle in A-G class
« Reply #23 on: August 05, 2011, 10:04:14 AM »
When you are at speed do you rest your helmet on anything? I'm thinking in a lay down position that might be handy but I don't know if this would work due to vibration or bounce. I had a sprint kart that was partially reclined and if I touched my helmet to the seat at all, I couldn't see. But of coarse it had no suspension.
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Offline Nortonist 592

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Re: Lay down motorcycle in A-G class
« Reply #24 on: August 05, 2011, 12:04:16 PM »
I have a small foam pad I rest my helmet on during a run.  In my case it works fine.  But at idle on the line waiting if I rest my head against it, suddenly there are four starters instead of one!  One thing I have found was I can't lay down too far.  It becomes impossible to see over the chin guard on a full face.  My original plan was to be flat as a pancake but wheelbase restrictions and the above vision impediment forced me to be "folded" up slightly.  I don't believe there are wheelbase restrictions in A so you have a bit more freedom.
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Offline Nortonist 592

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Re: Lay down motorcycle in A-G class
« Reply #25 on: August 05, 2011, 05:54:38 PM »
DaveB and Richie.  Any chance of posting progress photos?  Or better still start a build thread. 
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Offline tomsmith

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Re: Lay down motorcycle in A-G class
« Reply #26 on: August 05, 2011, 07:47:43 PM »
Another (and last) picture of Bud Hare's lay down/face down 500cc Triumph.  It was the Class A (fuel) record holder at Bonneville in 1952 at 134.597mph, beating Rich Richards' conventional sit-on Triumph by only 1 or 2 mph.
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139mph with no bike, but with speedo and helmet.

Offline Glen

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Re: Lay down motorcycle in A-G class
« Reply #27 on: August 05, 2011, 08:02:37 PM »
Notice the safety gear Bud was wearing. One hell of a rider in the day.
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Offline Unkl Ian

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Re: Lay down motorcycle in A-G class
« Reply #28 on: August 05, 2011, 08:43:46 PM »
Is the human body more aerodynamic, head first, or feet first ?   :?



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Offline Richie

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Re: Lay down motorcycle in A-G class
« Reply #29 on: August 05, 2011, 09:04:24 PM »
when i was kid , i used to ride a skateboard down a hill and headfirst i felt like i had more control... layin on my back felt like i had more speed and not so much control
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