where u guys buying your scales to weight the car parts?

look at american weight scales (aws) there clearance items but get a calibration weight when you buy so they can all be dialed in

Bob you have a email with gtp2 and ntc3 files attached hopfully youll be getting nt1 we soon
as for scales
http://www.americanweigh.com/
generally they have clearance grams scales dirt cheap

Awesome. Thanks I'll get these up on the website ASAP.

Azeroth, just uploaded the OFNA GTP and NitroTC3 files.

I changed the CG height in the NTC3 car file to 34mm. Can you check your numbers and see what it should be.

i will re weight it again tonight

Just uploaded the AE 8.2 1/8th scale Nitro buggy model kindly donated by a RC3 user. That's the first Offroad model.

If anyone has that giving feeling please send them through.

sorry bob didnt rescale it will do it later this evening

Will this program be able to work with cars like the Awesomatix where you can change there are more options for upper than what is in the program?

My only thought is to model it in solidworks and get some data out of that that I can somehow use in the RC Crew Chief.

The Awesomatix is a little different beast from what the program is setup to handle. That being said with a some careful measurments the Suspension link geometry should work. The trick would be to come up with a way to convert the Awesomatix spring positions to the upright shock geometry RC3 uses. If I could get my hands on one for a day I'm sure I could figure out a model for it.

The other approach would be to measure the front/rear Ride Stiffness of the chassis at various spring positions and use that data to come up with an upright shock model. Measuring the Ride stiffness is fairly easy. You just need scales and a stepped ride height gauge. I can post some details on how to do it if you want to try and measure it.

I have access to a mitutoyo digital height gauge at work so measuring the ride stiffness would be easy.

The other thing is the rear castor and front and rear dynamic castor.

I was just on the Awesomatic site and they have some good CAD images that I could use to generate the suspension link geometry. What I do is import the image into my CAD program and set the pivot points from the image. I just need a couple of measured reference points to scale the drawing. I've done this a couple times and it works OK. Comparing this method to measurements the results were within ±.2 mm or so.

Here is the method I use to measure the ride stiffness.

1. Remove the wheels and install setup wheels or stands. Don't leave the tires on as the tire stiffness will affect the measurments
2. If measuring the rear support the front chassis on a piece of round bar or triangle scale so the front chassis can pivot with zero resistance and doesn't affect the measurements.
3. Place the rear on scales.
4. I use a stepped ride height gauge with .5mm increments to measure the chassis displacement. Slide the gauge in to the rear of the chassis until it stops. Press down on the rear shock tower and record the left/right scale loads.
5. Slide the ride height gauge out to get on to the next step. Press down on the rear shock tower and record the left/right scale loads. Keep repeating this until you run out of Ride height gauge.
6. Ride stiffness at each point is change in load between measurement steps divided by the height of each step (usually .5mm).

You would have to adapt this procedure to use your height measurement method.

As far as the Castor is concerned the program is only 2D, so castor, pro/anti dive and squat are not considered at this point. 3D may come down the road.

A new version of RC Crew Chief is available. The update will be delivered automatically the second time you open the program with an active internet connection.

• The new version contains the following updates/improvements:
• New Dynamic module that simulates chassis roll response to lateral acceleration including the effect of droop settings.
• Help files added to each page.
• Graphics improvements.

I have lots more improvements in mind for the new Dynamic module but if you have any suggestions feel free to send them through. User feedback welcomed.

Here is a screenshot of the new page

Thanks Bob, awesome job, now i just need to get my head around the new page ;D

Spend a few minutes and read the Help File on that page (that applies to everybody), it's only a few pages. Then just start playing with settings, watching the animation and looking at the graphs. You'll get the hang of it.

Enjoy