RTI Ramps

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Newsgroups: rec.autos.4x4
Subject: Need specs for Ramp for Travel Measurement
From: cobyh@holly.colostate.edu (coby hughey)
Date: 7 May 1996 06:21:23 GMT

I am looking for plans or specifications, explanations, and/or stories from 
clubs that own them about using ramps to measure travel.  I understand that one 
of the 4wd rags ran an article recently that included plans; anyone know the 
issue?  
Has anyone had a ramp fall apart when a truck was on it?
Has anyone had problems with their ramp?
What is the equation used to calculate rti?
Anyone build a ramp on an axle so it easy to tow?
Are the rti readings somewhat standardized?

Thanks in advance from the Mountaineers of Ft. Collins, Colorado and from Coby 
Hughey.

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Newsgroups: rec.autos.4x4
Subject: Re: Need specs for Ramp for Travel Measurement
From: ryna10@email.sps.mot.com (Jay Kopycinski)
Date: 7 May 1996 15:31:30 GMT

In article <4mmq53$37f2@yuma.ACNS.ColoState.EDU>, cobyh@holly.colostate.edu
(coby hughey) wrote:
 
> Has anyone had a ramp fall apart when a truck was on it?

Been on three different ones and they all held full-size trucks fine.

> Has anyone had problems with their ramp?

Never seen a problem.

> What is the equation used to calculate rti?

Ramp is 20 degrees. Measure distance traveled up the slope of the ramp from
bottom edge of ramp to front tire centerline. Divide this number by the
vehicle wheelbase, then multiply by 1000.

> Anyone build a ramp on an axle so it easy to tow?

Yes, seen several done this way using removable trailer tires and a
removable
hitch.

> Are the rti readings somewhat standardized?

The ramp angle is 20 degrees.

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Jay Kopycinski             '85 Toylet  (ROKTOY)       
Chandler, AZ               '91 4Runner

Motorola Fourwheelers      ASA4WDC   UFWDA
Fun Country Fourwheelers   SWFWDA    TLCA
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Newsgroups: rec.autos.4x4
Subject: Re: Need specs for Ramp for Travel Measurement
From: cobyh@holly.colostate.edu (coby hughey)
Date: 7 May 1996 18:21:13 GMT

In article , ryna10@email.sps.mot.com 
spouts...
>
>Ramp is 20 degrees. Measure distance traveled up the slope of the ramp from
>bottom edge of ramp to front tire centerline. Divide this number by the
>vehicle wheelbase, then multiply by 1000.
>
The point of centerline, is that a line drawn perpendicular to the ramp 
surface from the center of the hub, or perpendicular to the ground?

coby