Ye Olde Rocket Forum - View Single Post - Ancient NAR Motor Data C5-3

Quote:

Originally Posted by tbzep

I've set up a spreadsheet to compare Total, Peak, and Avg thrust with clusters to compare them with larger single motors. I'd love to compare some clusters to real B14 data. Of course, that's only if they provide an early enough example that shows it's a real B14 instead of a rebadged B8.

I'm almost positive I can successfully fly Saturn V on a triple B6-2 or B4-2 cluster! Peak thrust is greater than a single D12 and total impulse is only a few ticks lower. Probably would only get 75 ft!!!!

Setting up a spreadsheet is a great idea. Makes it easy to compare trade offs in motor choice.

I have all the NAR motor files bookmarked, so I can look up average thrust and peak thrust on all the motors I use, as well as have, or may want to buy. This is especially important since I’ve found motor designations to be wildly off for some motors. The worst examples I have are the Aerotech 18/20 reloads I use on my Mars Lander. I decided on the D13 initially, thinking the D24 may have too much kick. Turns out the D24 is really a D15 (average thrust of 14.77N vs. 12.67N for the D13). I’ll try a D24 next flight. The Mars Lander just screams on a D13, by the way.