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Honda NR750 v. 1.0

Started by Blackheart, April 21, 2016, 12:51:23 PM

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h106frp

Once you have the radii, you should go to bikeED and add them to check you steering geometry - trail for NR750 is 88mm at 24 degrees on 1435mm wheelbase

Blackheart

Quote from: h106frp on April 25, 2016, 09:03:34 PM
Once you have the radii, you should go to bikeED and add them to check you steering geometry - trail for NR750 is 88mm at 24 degrees on 1435mm wheelbase

The problem is to understand how to get to 88   ;D

h106frp

Yep, BikeED is fiddly, but trail has a big impact on wobbles and front folds

Blackheart

I know my geom
Quote from: h106frp on April 25, 2016, 10:39:22 PM
Yep, BikeED is fiddly, but trail has a big impact on wobbles and front folds

I hope for the v 0.5 geometry will be complete (or almost) it is the longest and most boring part for me  ;D

Allen

Just messing with some on board sound.... may need more punch at higher revs
(it's actually an NC30 VFR400.. so plenty of cam gear whine) - hopefully youtube quality doesn't make it sound too bad!

https://www.youtube.com/v/KMg7T46aIO8

Blackheart

April 25, 2016, 11:11:39 PM #140 Last Edit: April 25, 2016, 11:46:08 PM by Blackheart
Personally I love it!  :o

Yes, perhaps at high rpm should "scream" a little more  :D

EDIT: And it is overly "empty" It needs more work. But its a very good start.

h106frp

Quote from: h106frp on April 25, 2016, 07:44:19 PM
OK, tried the tire radius change and it is reflected in game - note rear tire to track 'gap'

The default tyre is wider and taller than my road bike tyre so i will have to make a full tire set  :(




Wish the rider would bend his arms a bit  ;D

Something strange going on with tire sizing/tire model/tire file/bikeED;

All set to make a tire set based on what i have observed in the relationship between in sim view and tire file radius. Load up the model expecting to find my tires are undersized on radius but the dimensions are correct   ???  (in fact spot on for Dunlops)

So now i am very confused as too why i have to reduce the tire radius in the tire file to get the tire to touch the track. I will do the calcs to create the correct contact arc but i cannot see how that changes the radius parameter sizing.

Puzzled!



Hawk

Is it because the tyre data is real, but the model of the tyre is not the same dimensions as the real tyre data?

Not used bikeED before so this is just the first thought off the top of my head.  ;)

Hawk.

h106frp

April 26, 2016, 08:16:46 AM #143 Last Edit: April 26, 2016, 09:41:52 AM by h106frp
The model tire is the correct radius and width using real life tire sizing nomenclature.

Wheel is correctly defined with inner bead diameter to define my wheel diameter at 17''.

Seem to need to lose 15mm on calculated radius to achieve the value that looks visually correct and that already assuming the smaller tire shoulder height=radius   :(  (suspiciously close to the wheel flange height value :-\  )

I will have another go at iterating through the BikeED / tire file process this evening - perhaps the problem is there.

I get TorusRadius=0.104, radius 0.315 for 180/55/17 rear  --> The smaller radius should help raise the height a bit
        TorusRadius=0.061, radius 0.300  for 120/70/17 front ---> this seems to be about correct assuming radius=shoulder height   :)

Maybe it will work out OK based on the front tire calc being correct :)


h106frp

Quote from: Blackheart on April 25, 2016, 02:21:23 PM
For the rear tyre have u tried to change the radius?

The orginal model has front: 130/70 ZR 16; rear 180/55 ZR 17

For you wheels assuming radius=shoulder height   ::)  ;

Front 16''
Radius = 0.294
TorusRadius = 0.066

Rear 17''
Radius = 0.315
TorusRadius = 0.104

The front is very close to the default tire presumably due to aspect difference- can you check the tyre OD measurement in your 3D app ?

Blackheart

Quote from: h106frp on April 26, 2016, 10:06:43 AM
For you wheels assuming radius=shoulder height   ::)  ;

Front 16''
Radius = 0.294
TorusRadius = 0.066

Rear 17''
Radius = 0.315
TorusRadius = 0.104

The front is very close to the default tire presumably due to aspect difference- can you check the tyre OD measurement in your 3D app ?

Excuse full morning at work  :-\

Probably the wheels I have to resize, at the moment in 3ds max are:

Front tire: 0,332m and 1,48m
Rear tire: 0,489m and 1,616m


HornetMaX

Quote from: Blackheart on April 25, 2016, 11:38:13 AM
There is a wiki page for the tires?  :o

I found this http://forum.piboso.com/index.php?topic=687.0

If anyone understands these things, translate it for me in an easy way  ;D
What you don't understand exactly ?

The total radius of the tyre (from rim center to tyre middle) is "Radius": if in game your tyre is flying (assuming that doesn't come from the track), just reduce this to match the overall radius of the 3d model of your tyre. I think that should be enough. The width is in degrees.

In GPB the profile is simply round I think. Notice that there's no notion of rim size in GPB, only the 3 params matter for physcis (Radius, TorusRadius, Width).
Getting the right Radius will make the tyre touch the asphalt with the bike vertical.
Once this done, playing around with TorusRadius and Width will make the tyre touch the asphalt (as much as possible) when the bike is leaning, but they will also change the tyre profile.



I can be wrong, I don't recall PiBoSo bothering to confirm or correct all this stuff.

Quote from: h106frp on April 25, 2016, 12:22:14 PM
MaXTire(tm)  please MaX ;)

There's already a MaxTyre, but it deals with the tyre physcal model more than with the dimensions.
For the dimensions a spreadsheet is more than enough.

Quote from: Allen on April 25, 2016, 02:46:07 PM
The width parameter doesn't really define the width, it defines how flat the profile of the tyre is, so in fact the more round profile is more likely on the front.

Let's put it this way, to do an Avon Speedmaster rear tyre, you would need width to be about 5 and TorusRadius to be around 0.254 (or in other words the same as the wheel + tyre radius), on the other hand a bicycle racing tyre would have a width of 90, but the TorusRadius would be about 0.01
That Avon would be a very very very flat profile and fairly thin: 2 * 0.254 * sin(5deg) = 4.4cm !

Allen

Quote from: HornetMaX on April 26, 2016, 12:54:04 PM
Quote from: Allen on April 25, 2016, 02:46:07 PM
The width parameter doesn't really define the width, it defines how flat the profile of the tyre is, so in fact the more round profile is more likely on the front.

Let's put it this way, to do an Avon Speedmaster rear tyre, you would need width to be about 5 and TorusRadius to be around 0.254 (or in other words the same as the wheel + tyre radius), on the other hand a bicycle racing tyre would have a width of 90, but the TorusRadius would be about 0.01
That Avon would be a very very very flat profile and fairly thin: 2 * 0.254 * sin(5deg) = 4.4cm !

I never bothered with the maths, it's was more making a point.. about double that would be close then

if you want a laugh http://www.avon-tyres.co.uk/motorcycle/safety-mileage-mkii

I actually had one on the back of an FS1E for a while..

Allen

April 26, 2016, 02:34:42 PM #148 Last Edit: April 26, 2016, 03:14:05 PM by Allen
fuck it....

Blackheart

April 26, 2016, 02:47:41 PM #149 Last Edit: April 26, 2016, 03:02:38 PM by Blackheart
Pls no confusion here just the official files from the modders (me and matty) delete the links pls. If u want help with the engine or other stuff speak with matty.

The sounds quality is too low for put it in the mod.