Landracing Forum Home
December 13, 2017, 11:32:47 PM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News:
BACK TO LANDRACING.COM HOMEPAGE
 
   Home   Help Search Calendar Login Register  


(Note: Donations are not tax deductible)







Live Audio Streaming and Archives of Past Events
Next Live Event: TBD
Pages: 1 [2]   Go Down
  Print  
Author Topic: Hump on back neckline  (Read 5251 times)
0 Members and 1 Guest are viewing this topic.
stay`tee
Sr. Member
****
Offline Offline

Age: 65
Location: Mackay, Qld. Australia
Posts: 432


"Kawasaki ZX12"


WWW

Ignore
« Reply #15 on: September 05, 2017, 06:52:41 PM »

The "hump" has stuff all affect on speed, however, "standing"(flattening your back) can make a significant improvement  smiley
Logged

First Australian to ride a motorcycle over 200mph at Bonneville,,,
AHG
Full Member
***
Offline Offline

Age: 62
Location: Chesterton, Indiana
Posts: 229



WWW

Ignore
« Reply #16 on: September 06, 2017, 11:49:50 AM »


#1 - The comments regarding SCTA rules serve no purpose on the BMST page, as that speed meet is strictly involved with the AMA and F.I.M. regulations.
The same would pertain to motorcycle rules inquiries for the Cook Shootout.

#2 - Leathers with the hump on the back are allowed in all AMA and F.I.M. LSR classes, except for streamliners naturally
Logged
Pippi2
Full Member
***
Offline Offline

Posts: 70


"Do or do not.... there is no try"




Ignore
« Reply #17 on: September 07, 2017, 09:27:57 AM »

Page 23 of the BMST Rule Book:
2. O. (IV) LEATHERS
Suits made of synthetic material are not permissible. The use of stretchable Kevlar and perforated materials in non- critical areas are permissible. Leather suits shall be one- piece design or joined by a full circumference zipper at the waist. Leathers cannot be too big or loose. Critical area (knees, elbows, forearms, shoulders) armor or 2-layers of leather is highly recommended. Due to invisible flames, riders’ of motorcycles burning fuels of Methanol content are recommended to wear Nomex underclothing or something of similar nature.

We do not have a rule on leather humps. It's the machine that gets classified for records, not what you are wearing.
The BMST has different rules than the SCTA.

Stay fabulous,
Linnea
Logged
comet
Full Member
***
Offline Offline

Age: 45
Location: Kent, England
Posts: 137





Ignore
« Reply #18 on: September 12, 2017, 10:39:44 AM »

Chris it was brilliant to see you running the bike this year. Can't tell you how much Dawn and I enjoyed flagging you both off. Well done to you both.
Best wishes.

Logged
Chris V
Full Member
***
Offline Offline

Location: Crows Landing CA.
Posts: 70




Ignore
« Reply #19 on: September 13, 2017, 09:33:27 AM »

Comet, we are off topic here but anyway I am looking forward to next year grin, Sandy not so much cry
Logged

1972 Yamaha R5  350cc
comet
Full Member
***
Offline Offline

Age: 45
Location: Kent, England
Posts: 137





Ignore
« Reply #20 on: September 13, 2017, 10:16:08 AM »

It was a hot one this year for sure. It must have been hard work sitting in leathers.
I have read elsewhere (previously) that the race humps in leathers do not have much of an effect on performance until higher speed numbers are reached, over 125ish. Not sure if that is correct or not. But I have also heard they offer a safety benefit. A local hospital in Kent was doing research a couple of years ago into accidents with and without speed humps. I never found the outcome which would have been very interesting.
Logged
Doc B.
New folks

Offline Offline

Age: 61
Location: Bainbridge Island, WA
Posts: 20



WWW

Ignore
« Reply #21 on: November 20, 2017, 10:46:10 PM »

For what it's worth, the late Dr. John Hinds wrote about speed humps and in particular their hindrance of getting an injured rider safely on their back in the case of spinal injuries and for the difficulty added during intubation. His experienced recommendation was to roll the patient on their side and cut the hump off with a scalpel so you can get the patient in a natural supine position without their head tilting back.

http://motorcycleminds.org/2017/03/24/the-hump/

Note that this article does not deal with whether or not a hump is more safe than no hump in a crash. But Hinds pointed out that they are an aero feature, not a safety feature. My impression is that back armor and a neck brace (or one of those awesome inflatable MotoGP suits) are going to be more effective than a speed hump in preventing injury in that area of the body. Seems pretty clear a speed hump is for, well, speed. Hinds was a really entertaining lecturer and I highly recommend his Cases from the Races lecture that is posted on youtube.
Logged
noboD
Full Member
***
Offline Offline

Location: central PA
Posts: 53




Ignore
« Reply #22 on: November 21, 2017, 07:25:16 AM »

Just a semi-related question from the cheap seats. Are the new helmets with the point in the back considered aero? Seems to me if the speed bump is so should the helmet.
Logged
Pages: 1 [2]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!


Google visited last this page November 21, 2017, 03:45:04 PM