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Can someone do a sim for me PLEASE??

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Vance in AK

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I'm trying to get projected altitude for a Super Big Bertha, with the stock D-12, & also with an E9-4.
It is built stock with the exception of being setup for "E" motors.
Thanks, Vance in AK.
 

dluders

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Here are the projected altitudes of an Estes Super Big Bertha flying on a D12-3 and E9-4:

D12-3: 596 feet maximum altitude
E9-4: 1,035 feet maximum altitude

Since I don't know the exact launch conditions in Alaska, I modelled the simulation using 2210 feet above sea level, 25 degrees F. and Light Winds (3-7 MPH).
 

Vance in AK

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Thanks dluders, I really appreciate it.
About the only thing I would change on your conditions would be the altitude. We are at 95'(yes 095') above sea level.
I don't know how much difference this would make.
Thanks again.
Vance in AK.
 

dluders

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I recalculated the RockSim flights, using 95 feet Elevation, Light Winds (3-7 MPH), and 15 degrees F. air temperature for the launch site conditions. The altitudes really didn't change much:

D12-3: 600 feet maximum altitude
E9-4: 1,044 feet maximum altitude
 

Vance in AK

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Thanks again dluders.
Guess if I'm going to stick with this stuff I'm going to have to get a sim program.
Wonder if it's too late to put it on my Christmas list???
Vance in AK.
 

teflonrocketry1

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Attached is my rendition of the simulation file for the Super Big Bertha Kit, Estes No. 2018. Note, I did not find this one in the EMRR library or at Jim Z's site. It was done using RockSim version 5 so you can open and modify it using the demo version of the software available from the Apogee website. I am not sure how this kit looks on the inside and the exact fin shape and body tube lengths. If you have the details and post them here I will create a more accurate file.

Bruce S. Levison, NAR #69055
 
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