Aerotech G42 thrustcurve

[Walter Longburn]

Does anyone have a thrustcurve file for the AT G42?

 

[OKTurbo]

Googled it...
https://www.aerotech-rocketry.com/c...s/NAR/single-use/24mm_mr_su/g42w_nar_cert.pdf

 

[Walter Longburn]

So how do I get that thrustcurve into Openrocket?

 

[neil_w]

https://www.rocketryforum.com/threads/how-to-add-a-motor-to-openrocket.123622/post-1869147

 

[Walter Longburn]

I've added thrust curves to OpenRocket before. That link is only a picture of a thrust curve, not the actual thrust curve data that OpenRocket needs.

 

[neil_w]

Whoops sorry, I misunderstood the question.

At some point the thrustcurve file should show up on Thrustcurve.org... I confess I don't know who actually is the person that creates the initial file from the NAR test data.

 

[Walter Longburn]

Does anyone have a thrustcurve file for the AT G42?

I have a file for it now.

 

[dhbarr]

Whoops sorry, I misunderstood the question.

At some point the thrustcurve file should show up on Thrustcurve.org... I confess I don't know who actually is the person that creates the initial file from the NAR test data.

https://www.thrustcurve.org/info/tctracer.html

 

[Walter Longburn]

My brother used WebPlotDigitizer to get the numbers out of the graph to make the .eng file.

 

[neil_w]

My brother used WebPlotDigitizer to get the numbers out of the graph to make the .eng file.

What a cool tool that is, I never knew such a thing existed.

 

[Rocketjunkie]

Rocksim and Openrocket can import .eng files. Use the engine editor.

 

[JohnCoker]

I've added thrust curves to OpenRocket before. That link is only a picture of a thrust curve, not the actual thrust curve data that OpenRocket needs.

I have written a program to trace an ENG file from an image:
https://www.thrustcurve.org/info/tctracer.html

 

[JohnCoker]

Does anyone have a thrustcurve file for the AT G42?

Wow, that does look like an ancient certification doc, but that motor is not on the current lists.
https://nar.org/SandT/pdf/CombinedMotorsByImpulse.pdf
If it really is still available, I will add it to ThrustCurve.org.

 

[Walter Longburn]

If it really is still available, I will add it to ThrustCurve.org.

As far as I know they haven't been made for a long time. I recently bought some from another rocketeer.

 

[JohnCoker]

As far as I know they haven't been made for a long time. I recently bought some from another rocketeer.

Well, if you want to make a thrust curve for it, I've added it to ThrustCurve.org for historical purposes:
https://www.thrustcurve.org/motors/AeroTech/G42/

 

[Walter Longburn]

I've added it to ThrustCurve.org for historical purposes

Thanks

 

[Initiator001]

As far as I know they haven't been made for a long time. I recently bought some from another rocketeer.

The G42 motor was created in response to the Rocketflight 38mm G100 black powder motor.

The G100 showed up at a Danville launch in the early 1990s. It was a huge motor for a 'G'.
The big draw was that it cost $6.00 and it was very reliable.

AeroTech came out with the G42 to compete with the G100.
The G42 was sold in a ten-pack for $59.95 ($5.95 each), 24mm diameter, White Lightning AND was NAR certified.

Rocketflight later came out with a F50 and an H220. A new propellant know as Silver Streak was used to get spark effects with the H220 motor.
Later they used 29mm aluminum tubing for casing.

These motors disappeared a few years later. I don't recall why.