Motorcycle Streamliner Frame Dimension Changes

[panic]

Since he's off line, here's the posted e-mail text:

"From: Mike Manghelli [rulebookinfo@scta-bni.org]
      Sent: Mon 9/22/2008 11:19 PM

To: ctracing@earthlink.net

Subject: RE: Comments


Terry,

I have not heard these types of rumblings, but then....

I will answer your questions under them. Let me know if you require further clarification.

Mike

-----Original Message-----
From: ctracing@earthlink.net [mailto:ctracing@earthlink.net]
Sent: Monday, September 22, 2008 7:52 PM
To: office@scta-bni.org; rulebookinfo@scta-bni.org
Subject: Comments



Here is the information submitted to  from 4.88.163.184 on Monday, September 22nd, 2008 at 7:51 pm

------------------------
Name: Terry A. Hume

Address: 28795 Sky Village Ave.

City: Clinton

State: Missouri

Zip Code: 64735

Home Phone : 660-477-3535

Email Address: ctracing@earthlink.net

Cell Phone: 660-525-0484

Rulebook Section: 7.H

Rulebook Page No: ---

Question: It seems as though the motorcycle streamliner and sidecar streamliner frame/roll bar material dimensions MAY change from the current specs to more closely conform to the car specs. If this becomes fact, it will impact several finished m/c streamliners and several currently under construction which could cause a financial burden and create costly delays in construction. Please consider any changes carefully.
I do have a few questions that I feel need to be addressed for clarification:

1) Does "FRAME" mean the entire frame structure including everything in front of the front tire and behind the rear tire (including the supporting structures for the nose, chutes and tail)?
If you are speaking of an automobile, we consider the frame of a special construction vehicle the area of the driver's cockpit only. The rest of the structure must be of suitable material to support the structure of the vehicle.

2) Is the frame considered the structure just between the front and back wheel?
See #1

3) For a Sidecar Streamliner, is the sidecar frame considered a part of the main framework of the streamliner and therefore would fall under the same "FRAME" dimensional requirements?
No, see #1

4) Is the frame considered the structure enclosing only the cockpit/drivers area?
You got it!

5) I also wonder if the roll bar would really have to change to the 1.625 x .120 (car spec) or if it could be 1.500 x .090 or .120 since its primary purpose is to prevent the body from caving in on the driver and to prevent the driver from contacting the outside world. That depends, how fast is the vehicle going to go? How much will it weigh?.... All things that must be taken into consideration during design....

This is a copy of your Petition for Rule Change or Clarification from the SCTA/BNI
No virus found in this incoming message.
Checked by AVG - http://www.avg.com
Version: 8.0.169 / Virus Database: 270.7.0/1683 - Release Date: 9/21/2008 10:10 AM"

The buttons are large and ugly because they have to be big enough to put the mouse where you want it or function is reduced. I apologize for the cluttered and rough appearance.

[willieworld]

panic  i still cant change the numbers --maybe its my computer --thanks for your postings----------------  willie buchta

[panic]

Easiest test: click Cell J4 and substitute another number from the keypad, or just hit "delete", values should change. The spin button has no effect? You may an older version of Excel?
Look on the toolbar for "Tools", then "Protection". If you see a selection that says "Unprotect", click it.

[panic]

Elaborating: one of the hardest concepts to grasp is the difference in stiffness between a 2-dimensional object (assumes tube = line, thickness = 0) and a 3-dimemsional object.
Both resist deformation in X and Y (duh), but almost any amount of enhancement to OD, braces etc. are useless at resisting "twist" or "wracking" in the Z plane of a 2-dim object. It must have a 3rd element (depth) added to work, but this isn't that tough to do.
Foale suggests that a pyramid of very small tubing added "inside" the open area of a rectangle, trapezoid etc. dramatically increases resistance to twist with only a few ounces of weight penalty and minimal intrusion into the driver's space (even 1" on each side helps, and it need not be centered). Drawing "borrowed" from his on-line samples (buy his book for more details):

[panic]

Revised the Excel file, more possible entries, posted in "Formulas".

[Loose Goose-Terry#1]

  We should have a definitive answer to the motorcycle streamliner frame rules after the November rules meeting 

Terry 

[1212FBGS]

really.?.... interesting.!.... Is this your speculation or rumor.?...How have you drawn that conclusion or has someone told you this.?....
kent

[Loose Goose-Terry#1]

Hi Kent,  8-)

Below is a quote from bak189. He is keeping me up-to-date now and has been in contact with Van. Since I don't belong to a Cal club and therefore don't have any say in the rules, I didn't feel like I should keep pestering Van (whom was kind enough to give me a heads up so I didn't waste anymore time or money on something that might not be legale).

"Terry, according to Van Butler nothing will be decited regarding tubing size and wall thickness until the board meets in November.

B.B."

Thanks,

Terry 

[LittleLiner]

Terry

Check your 'My Messages'.  The package is on the way. 

Art