Help with unlabled RMS Reload

[Skylark4]

Hi all. I have a 38/480 reload that is not labled as to what it is. Had it for a while so I cant remember what rocket I bought it for. The internal diamiter of the nozzel is .185 inch so that should be a good indicator. This will be used for the wifes level 2 cert. Help

 

[mikec]

Not seeing anything with a nozzle that small, but maybe I missed it. The I154J appears to have the smallest nozzle. https://aerotech-rocketry.com/resources.aspx?id=6

 

[tfish]

AT 38/480 I154J https://www.aerotech-rocketry.com/c...gs/38mm_hp_rms/38-480/38-480_i154j-m_assy.pdf

uses a 01500 nozzle.

RCS Rocket Motor Components 01500 nozzle shows a throat of .180" https://www.rocketmotorparts.com/2938mm_Nozzle_0180__Throat/p1577809_7762949.aspx

Not an L2 motor

Tony

 

[Skylark4]

Sorry Tony, I should of mentioned its for a Canadian L2 ( must be an I motor). It very well could be a .180 throat as it was a bit tuff to get an acurate read. That and a cheap Vernier Caliper may be "off a bit".

 

[dhbarr]

Pics of the grains and/or measuring the core would further confirm.

 

[swatkat]

agreed, grain pics will help, it's pretty easy to tell red, white and green. FJ and blue are pretty similar.

 

[Skylark4]

Core diameter is .419ish.

 

[Skylark4]

 

[swatkat]

my vote would be fast jack

 

[tfish]

Aerotech's website shows the I225FJ to have a nozzle with a .266" Throat https://www.aerotech-rocketry.com/c...s/38mm_hp_rms/38-480/38-480_i225fj-m_assy.pdf

Are there any Marks alot, Sharpie flet pen marks lengthwise on the outside of the grains? If so, what color are they?

Tony

 

[Skylark4]

The date stamped on the back of the instructions is May 04 2000 if that helps any as well.

 

[thequick]

I’ve noticed the 38mm grains I’ve been getting have a colored line down the side that corresponds to the color. Are these grain marked similarly?

 

[tfish]

IIRC...2000 predates FJ and maybe Redline too.

found this.."and the new Redline propellant formulation, planned for release in early 2001"

Tony

 

[dhbarr]

Yeah, I'd guess that lines up for Blackjack ( not fast ). Electronic deployment?

 

[swatkat]

my vote would be fast jack

Or Black Jack def not white, green or red. blue is usually a little darker.

 

[Voyager1]

Pics of the grains and/or measuring the core would further confirm.

Plus its mass.

 

[Voyager1]

The date stamped on the back of the instructions is May 04 2000 if that helps any as well.

A 20 year old reload! Better scrape the inside of the top grain where the igniter will sit so it ignites reliably. Also, scrape the base of the delay grain and the butted faces of the fuel grains.

 

[n3tjm]

It is a black jack load. They were casted in thicker casting tubes so the propellant weight still remained at 62 grams.