hip precautions and roll cage - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> General Rodding Tech
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 02-26-2012, 01:37 PM
Last photo:
Join Date: Jun 2008
Location: Oregon
Posts: 150
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
hip precautions and roll cage

My 29 street-strip A sedan is a joy to drag race, running high 10s. My continued enjoyment is, however, now questionable, due to a mismatch between the design of my NHRA rollcage and the hip precautions which I now must follow due to total joint replacement of my left hip. Simply put, a person with a replaced hip must avoid postures in which the knee is raised higher than the hip. Phrased in terms of angles, one must keep lower than 90 degrees the angle between the knee and an imaginary vertical line drawn from head to toe in a standing position. In my A, I must bend my knee to almost 135 degrees just to slide into the driver's seat and, when seated, my knees are both higher than my hip, at about 120 degrees. My physical therapist suggested that, for starters, I move the seat back 6-10 inches so that my legs could then be less than the 90 degree limit. That might be possible by modifying the driver's side roll cage to accommodate a recessed "funny car" style cage surrounding the driver, allowing the seat to then be back into into the now- recessed space. This does not, however, answer how one gets into that recessed seat without running afoul of the 90 degree limit.
I would be pleased to hear from any with suggestions, especially any who have had to address hip precaution issues in configuring their own car's interior.

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 02-26-2012, 08:09 PM
454 Rattler's Avatar
Last photo:
Join Date: Sep 2006
Location: Eagle River WI.
Age: 73
Posts: 1,425
Wiki Edits: 0

Thanks: 51
Thanked 131 Times in 117 Posts
Does NHRA still allow "swing-out" side bars on the cage ? Would that help ?

Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-26-2012, 09:03 PM
WDCreech's Avatar
Grumpy Old Goat Herder
Last photo:
Join Date: Apr 2006
Location: Anchorage, Alaska
Age: 73
Posts: 1,397
Wiki Edits: 0

Thanks: 5
Thanked 45 Times in 42 Posts
471A, do you have enogh head room to raise the seat?
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-26-2012, 10:09 PM
bentwings's Avatar
Last photo:
Join Date: May 2002
Location: St.Paul, Minn
Age: 75
Posts: 2,143
Wiki Edits: 0

Thanks: 3
Thanked 86 Times in 75 Posts
Just off the top of my head....a swing out bar will help getting in/out I think. Consider a sliding seat with a low left side. Back into it, lift the feet and slide the seat back. In the race position you may be able to have a side support to compliment the seat.

BTW a custom aluminum seat is difficult to make and expensive. I just finished one for a Nostalgia Funnycar. Prefer not to make another one.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-27-2012, 07:13 PM
39 chev's Avatar

Last journal entry: new pictures of T-bucket
Last photo:
Join Date: Apr 2005
Location: pennsylvania
Age: 70
Posts: 243
Wiki Edits: 0

Thanks: 2
Thanked 24 Times in 19 Posts
I have had both total knee replacements and total left hip replacement.I am currently building a T-bucket with a 2" seat riser.so obviously my knees will be higher than my hips.I had my surgerys 3 years ago,my orthopaedic surgeon has always assured me that after the initial healing process that there is no reason that I can't do everything I used to do before the surgery.obviously I gave up riding motorcycles but thats just common sense.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-28-2012, 08:08 AM
OneMoreTime's Avatar
Hotrodders.com moderator
Last wiki edit: Health and safety in the shop or garage
Last journal entry: Yard Dog pic
Last photo:
Join Date: Jul 2004
Location: Washington State
Age: 72
Posts: 8,828
Wiki Edits: 3

Thanks: 219
Thanked 457 Times in 409 Posts
I have some of the same issue in that I do not bend as well as I used to so getting in and out of a race cage can be a bit of a difficulty..I am working out the seating so when I am in I am in a comfortable position with my legs stretched out..Btw I am building my seats from steel as that is much easier than aluminum and the weight is not that much of a factor for me.. using a detachable steering wheel is a big help as well..

I have tried most all of it and now do what is known to work..
Reply With Quote Quick reply to this message

Recent General Rodding Tech posts with photos

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ned roll bar,roll cage help in a g-body cutthroatkid Hotrodding Basics 1 12-20-2010 10:30 AM
s-10 roll cage carnahan General Rodding Tech 13 09-14-2010 07:09 AM
s10 roll cage awoodman General Rodding Tech 3 07-15-2010 03:27 AM
Roll cage?? GearHead69 Interior 32 11-23-2004 11:41 PM
ROLL Cage D M N Interior 11 08-26-2003 02:11 PM

All times are GMT -6. The time now is 04:32 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.