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  #11  
Old 01-04-2019, 10:46 PM
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tbzep tbzep is offline
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Quote:
Originally Posted by BEC
I have the B8 data on my computer....

I just finished downloading all the Estes and Quest PDFs, including the B8 and C5 since they include a little more info than I put in my spreadsheet. Now if they discontinue another motor, I'll have it forever. I won't remember I've got it, but I'll have it!
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  #12  
Old 01-04-2019, 11:20 PM
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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 Iíve 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). Iíll try a D24 next flight. The Mars Lander just screams on a D13, by the way.
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  #13  
Old 01-04-2019, 11:21 PM
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found this link of rasp data B14s are listed

Code:
; B14 modified 8/11 to match NAR published delivered impulse, as tested 1/79 B14 18 70 0-5-7 0.0053 0.0193 E 0.037 7.8 0.075 18.0 0.150 27.2 0.280 3.0 0.330 0.0
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  #14  
Old 01-04-2019, 11:32 PM
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David,

That makes the B8 look pretty decent. I have a 3-pack of B8-5s. Iíll have to do a B6-B8 test next time I go launch. I bought them years ago, but honestly donít remember if Iíve flown any B8s before.
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Last edited by LeeR : 01-05-2019 at 02:28 AM.
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  #15  
Old 01-05-2019, 12:38 AM
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B8s give a quite noticeable extra kick off the pad vs. B6s - it's fun. I am seeing a similar look of late flying Q-Jet C12s.

Hmmmmmm.....next time I'm up at Sixty Acres flying on my own I should fly a B8-5 in a Nova Payloader with an AltimeterThree and then compare acceleration curves...... Or maybe I should write to Steve Lubliner and get official permission to fly B8s at the next WAC launch (weekend after this one upcoming). I have about a dozen and a half of them that I got from Rich O'Hara shortly after I BAR'd, coming up on 10 years ago now ( ).
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  #16  
Old 01-05-2019, 09:45 AM
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The raw rasp data pulled from r.m.r. left a little something to be desired. I jumped back on the NAR testing page and modified the URL to get all of the NAR test data on FSI motors. The composite G60 is missing, but everything else is there. The F100 is listed as an F80. We've all heard it was a baby F. Well, it's barely an F at 42.68N-s!

All testing was done in late 1994-1995. I thought Harold Reese died in 1993, so the test dates are interesting.

https://www.nar.org/SandT/pdf/FSI/
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