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  #1  
Old 02-03-2013, 10:28 PM
billspad's Avatar
billspad billspad is offline
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Default R141: NAR S & T New Motor Certification

The following motor has been certified by NAR Standards & Testing for
general use as a Model Rocket Motor effective January 6, 2013.


*************************************
Estes:

E16-0,4,6,8
29mm x114mm
33.38 Newton-seconds Total Impulse
26.44 Newtons Peak Thrust
15.95 Newtons Average Thrust

Propellant mass: 40.0 grams

*************************************
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  #2  
Old 02-03-2013, 10:33 PM
stefanj stefanj is offline
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Interesting . . . a cut-down F15? That is, an F15 without the long tail?

I'd have preferred to see something with a much higher peak thrust. An E30, say.

Why is Estes releasing so many low-thrust mid-power motors?

I am guessing that the black motor team has been testing all sorts of motor designs, but that the low-thrust long-burning varieties are the only ones that make the grade as far as reliability goes.
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  #3  
Old 02-04-2013, 06:14 AM
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billspad billspad is offline
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I can't figure out how to attach a pdf so you'll have to go over to TRF to get the data sheet with the curve but it is just like the F15 with a shorter sustaining thrust.
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Old 02-04-2013, 09:01 AM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
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Quote:
Originally Posted by billspad
Estes:

E16-0,4,6,8
29mm x114mm
33.38 Newton-seconds Total Impulse
26.44 Newtons Peak Thrust
15.95 Newtons Average Thrust

Propellant mass: 40.0 grams
7.50 lb-sec, 0.0883 lb propellant, 84.94 ISP lb-sec/lb. That's great.

Power/thrust=time. 33.38/15.95=2.09 sec burning time. Very useful.

Furthermore it has a full 1/2 second rise time to peak thrust. That's a little odd and users should watch what issues that may raise.

BTW at 40g, one can fly a three cluster within the FAA 125g exemption.

Tech Jerry
Attached Files
File Type: pdf ESTES E16.pdf (37.7 KB, 217 views)

Last edited by Jerry Irvine : 02-05-2013 at 11:11 AM.
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  #5  
Old 02-04-2013, 11:29 AM
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billspad billspad is offline
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Default

Okay, somebody want to tell me how to do the attachment?
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  #6  
Old 02-04-2013, 01:54 PM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
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Quote:
Originally Posted by billspad
Okay, somebody want to tell me how to do the attachment?
When you are editing the message go well below the edit window to a white button that says, "manage attachments". It will bring up a new window and the option I use most often is to "browse" for the file on my local drive and "open" it which starts the attachment process. Then select upload when you have verified it is the file you want. Then when it appears in the window near the bottom, close that little window and submit the message. You can always edit the message later and add further files as needed.

This doesn't work for a pdf, but of course you can place an image into the body of the message with the yellow square "img" button which puts the code in front of and after your URL for the image which you copy and paste into the message:

http://www.rocketryforum.com/attach...16&d=1340656145

BTW that didn't seem to work right.

Tech Jerry
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  #7  
Old 02-05-2013, 03:45 PM
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ghrocketman ghrocketman is offline
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Anybody wanna bet we see these and the new 29mm F15 motors on shelf before any of those Thundermess things ?

I just hope they sell them in 3-paks for a street price less than per n-sec of a RMS24 reload.
If CLOSE to the price per n-sec of a 24mm reload, I will buy them.
If even remotely close to the per n-sec cost of SU APCP motors other than the 18mm D and 24mm E15 through valuerockets, I won't. Will buy one of each for the collection and that's it.
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