scott  30 rr lr   33.5 rf  37.5 lf
ack   21 rf   23 lf
barbie  18 rf    21.5  lf
dave greene   42  rf  42  lf    37  rr  51  lr
wilson    21   rf    17   lf
fling    66  rf      68  lf  no rear taken
sleepy   36  rf    35   lf
eric     21   lf    21    rf
gary fling  31   rf    24  lf
skyhighranger      37  rf   41     lf      41    lr      31     rr   ( most balanced rig )


take each individual score and divide by wheelbase.
if you want overall score   average then divide.

any 's
leave anyone out?     

That can't be right.......
 

ok   ill look into it

I'm pretty sure my RR should be 41 too....at least I think you told me they were all 41, except for the RF at 37

damn   im screwing up left and right  ill recheck all figures and you are right kevin all were 41 but one.

if you average all wheels that is combined score on 30 degree   but i still cant get a straight answer about how to divide it.

help !!

That is the correct calculation for figuring RTI......(I think the "proper" way to "express" RTI of a particuliar rig, is to either average all the scores, or do the front axle and rear axle independently) .  But it doesn't take into account whether you are on a 20* ramp or a 40* ramp. 
BTW, what degree ramp was that one yesterday?

Here is a chart that I ran across a long time ago, to show actual axle articulation, when using a 20* ramp....I am sure that one yesterday wasn't a 20*...but kind of a neat chart none the less.

30   degree   thats the standard anymore with the rock crawling crowd, so it seems.

i think you are right about it being per axle.   not sure about the dividing part yet but the numbers im coming up with seem plausible.

You figure RTI like you said Flea......divide the inches traveled up the ramp by the wheelbase, then multiply that by 1000=RTI.  As I said, you can figure it by averaging the "4 corners" or by averaging each axle by independently.  But that does not take into account whether it was figured on a 20* or 30* ramp.  There is a lot of difference between a 1000 RTI score on a 20*, compared to a 30*.

I think your math is stable it is your definition that is shakey,
take your rti score (most of the time it is LF) and divide it by your total wheelbase
this will give you a number in decimal form, simply mulitply by 1000 and that is your score.
you could also contact pure evil (brent) on izook he has been running the one at zukimelt for years.

here is an example of my LF this year at zukimelt (30* ramp)
70"                             
(distance on ramp)
80"
(wheelbase)

70 divided by 80 = .875 times 1000 = 875

the scoring is the same on any angle ramp but of course your score would vary by each ramps angle

sorry about that skyhigh I am a little slow on the posting

pe  is a member here  maybe he will stop by again.

That's what I said!!!.....in a round-about way.   I sometimes don't explain things very well.
And as far as whether you want to measure just one corner, 2 corners, or all 4 corners (average or otherwise) to figure your RTI....that is a personal decision.....I don't know that there is an official "rule" on how it has to be done.  But, IMO, a "true" RTI calculation would be made by taking measurements from all 4 corners.....since very rarely will you find a vehicle that will flex exactly the same both driving up the ramp and backing up the ramp.

I know that is what you said and that is what my apology was for,
it is just that as I was about to post it came up and informed me you had posted,
I just hated to loose all that typen and also the fact that I am not very good at getting many posts on boards
I also agree that a four corners is probably better, but I am sure I am not alone when I take the biggest risks with my side of the rig as I can see what I am driving over, so I think that drivers front is the most important as you can always goose it to bring the back end down

the ramp was there we had time people were entertained and it was all good !!!


big thank you to billjohn from IZOOK

No problem.....sometimes I need someone to help me say what I am trying to say (that doesn't make sense either, does it ).

THANK YOU BILLJOHN   from IZOOK

he sent me this link

http://www.billjohn.com/rti/index.htm