Good Afternoon All;
Working toward completion of my Estes reboot of the Centuri Long Tom. Decided to take this opportunity to also begin playing around with Open Rocket. There is no Open Rocket file for the Long Tom, but there is a .rkt file for it available on Rocket Reviews that Open Rocket will read.
Uploaded the file and began running simulations with various engine combinations. In the course of doing so I noticed data that now has me questioning fundamental laws of physics...
This particular Rocksim file for the Long Tom details a rocket weight (empty) of 139 grams, 175 grams with a B6-0/B6-4 configuration, 180 grams with a C6-0/B6-4, and 185 grams with a C6-0/C6-5.
All of those configurations result in a liftoff weight well in excess of what is recommended per the Estes Engine Chart (~113 - 115 grams). For that matter, even the empty weight of the rocket is in excess of that recommended liftoff weight.
Is the Rocksim file that much in error in its empty airframe weight (Estes specs the Long Tom at 91 grams, but I've heard their numbers are borderline unachievable for mere mortals (or anyone who wants more than a dusting of paint,,,))? Unfortunately I don't have a scale to get an accurate weight of my model (it's on the 'to do' list). Is the data (weight) being 'corrupted' because I am using a .rkt file instead of a .ork one? Or is this 'operator error' and I am guilty of misinterpreting the information being presented to me in Open Rocket and/or the Estes Engine Chart?
Looking forward to feedback...
Thank you,
Dave
Working toward completion of my Estes reboot of the Centuri Long Tom. Decided to take this opportunity to also begin playing around with Open Rocket. There is no Open Rocket file for the Long Tom, but there is a .rkt file for it available on Rocket Reviews that Open Rocket will read.
Uploaded the file and began running simulations with various engine combinations. In the course of doing so I noticed data that now has me questioning fundamental laws of physics...
This particular Rocksim file for the Long Tom details a rocket weight (empty) of 139 grams, 175 grams with a B6-0/B6-4 configuration, 180 grams with a C6-0/B6-4, and 185 grams with a C6-0/C6-5.
All of those configurations result in a liftoff weight well in excess of what is recommended per the Estes Engine Chart (~113 - 115 grams). For that matter, even the empty weight of the rocket is in excess of that recommended liftoff weight.
Is the Rocksim file that much in error in its empty airframe weight (Estes specs the Long Tom at 91 grams, but I've heard their numbers are borderline unachievable for mere mortals (or anyone who wants more than a dusting of paint,,,))? Unfortunately I don't have a scale to get an accurate weight of my model (it's on the 'to do' list). Is the data (weight) being 'corrupted' because I am using a .rkt file instead of a .ork one? Or is this 'operator error' and I am guilty of misinterpreting the information being presented to me in Open Rocket and/or the Estes Engine Chart?
Looking forward to feedback...
Thank you,
Dave