"Plain Jane" Propellant

"Experimental" rocket motors are an exciting way to delve deeper into the hobby.
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patelldp
Posts: 160
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Location: New York

"Plain Jane" Propellant

Postby patelldp » Thu Nov 19, 2015 9:06 am

Here's my "Plain Jane" Propellant, based on Whitmore's Black Velvet and uses RIO in lieu of lamp black:

R45M - 13.52%
DOA - 2.31%
TEPANOL - 0.20%
Modified MDI - 1.97%

Aluminum 400 - 5.00%
Red Iron Oxide - 0.10%
AP 200 - 76.90%

I've had great success when using the Unimodal propellant listed above. A 54-4G CATO'd with the Trimodal version this year, so it's back to the drawing board there.

This propellant is nothing special, but it does appear to be quite versatile. I don't have accurate a and n figures, but know that with good mixing techniques you can run this to a Kn of 300, and incredibly safely up to 265-275. The a and n would be different for you, anyways! It's essentially plug and play in AMW hardware. Here's a test of the trimodal version firing here:

https://www.youtube.com/watch?v=VXwve3S61l4

29/6G Erosivosity Test (last grain and nozzle both 3/8") (picture by Dave McCann):

15375101822_17ce9e630c_b.jpg


38/4G Pad Cam .gif:

Image

54/1G:

OSC I190PJ - Oct 11 15.png


54/3G Grains:

ImageUploadedByRocketry Forum1410790312.157027.jpg


54/3G Flight (picture by Dave McCann):

15375285585_74722c27ef.jpg


Trimodal 54/4G Grains:

image.jpg


Trimodal 54/4G Right Before Boom...:

Bad Attitude CATO.png


Happy 54/4G Flight (onboard video: https://www.youtube.com/watch?v=BNcEqOdo6fU):

Bad Attitude K694.png


98/4G (picture by Todd Harrison):

IMG_4869.jpg


And last but not least...the 54/1750 Moon burn that flew successfully in September in my MAC 3" Arcas...flight data to follow!

ImageUploadedByRocketry Forum1419617592.375166.jpg
Dan Patell
TRA 10904 L3

PGagnon
Posts: 40
Joined: Mon Nov 09, 2015 5:49 pm

Re: "Plain Jane" Propellant

Postby PGagnon » Thu Nov 19, 2015 6:24 pm

Very nice pics Dan! I didn't know you could use a camera too. Question--- Why the Tepinol with 200 um AP? Paul G.

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patelldp
Posts: 160
Joined: Thu Nov 05, 2015 5:07 pm
Location: New York

Re: "Plain Jane" Propellant

Postby patelldp » Thu Nov 19, 2015 10:16 pm

PGagnon wrote:Very nice pics Dan! I didn't know you could use a camera too. Question--- Why the Tepinol with 200 um AP? Paul G.


The objective of TEPANOL is to form a tear-resistant shell around the AP particles and establish strong bonds between this shell and the propellant matrix. Effectively, the goal is to prevent debonding. Debonding is bad because it is unpredictable.

Regardless of the size of the AP particles, TEPANOL should be used for repeatable results.
Dan Patell
TRA 10904 L3

PGagnon
Posts: 40
Joined: Mon Nov 09, 2015 5:49 pm

Re: "Plain Jane" Propellant

Postby PGagnon » Thu Nov 19, 2015 10:36 pm

Thanx Dan. By the way, The motors you made for me are holding up very well. And, Nice grains. You can come over and cut my grains
any time you like. Paul

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patelldp
Posts: 160
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Location: New York

Re: "Plain Jane" Propellant

Postby patelldp » Fri Nov 20, 2015 8:41 am

PGagnon wrote:Thanx Dan. By the way, The motors you made for me are holding up very well. And, Nice grains. You can come over and cut my grains
any time you like. Paul


Glad to hear it! Cutting grains is simple!
Dan Patell
TRA 10904 L3

PGagnon
Posts: 40
Joined: Mon Nov 09, 2015 5:49 pm

Re: "Plain Jane" Propellant

Postby PGagnon » Fri Nov 20, 2015 10:20 pm

Yes I know, I'm getting good too. And yours are quite acceptable.

wefly2
Posts: 2
Joined: Sat Nov 07, 2015 7:20 am

Re: "Plain Jane" Propellant

Postby wefly2 » Sun Nov 22, 2015 9:48 am

How about a show and tell on cutting grains?

JD13x
Posts: 26
Joined: Thu Feb 04, 2016 10:35 pm

Re: "Plain Jane" Propellant

Postby JD13x » Sat Feb 06, 2016 6:08 pm

What was the Kn range on the 38 mm x 2G test?

JD

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patelldp
Posts: 160
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Location: New York

Re: "Plain Jane" Propellant

Postby patelldp » Sat Feb 06, 2016 7:43 pm

JD13x wrote:What was the Kn range on the 38 mm x 2G test?

JD


It's in the video bottom banner, I'll have to watch again to remind myself.
Dan Patell
TRA 10904 L3

JD13x
Posts: 26
Joined: Thu Feb 04, 2016 10:35 pm

Re: "Plain Jane" Propellant

Postby JD13x » Sat Feb 06, 2016 8:17 pm

Ok, max Kn of 297.
I didn't see the scrolling marquee.

JD


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