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TECHNICAL MEMORANDUM NO. 74-12 


LWL GRIDS FOR PRODUCT IMPROVEMENT TEST 
OF LWL FUEL TABLET 


by 


Frederick M. Drake 
Environment and Survival Branch 


April 1974 


Technical Memorandum for Peri< 


5 June 1973 - 7 September 1973 J[\ 


TECHNICAL LIBRARY 
BLDG- 305 

ABERDEEN PROVING GROUND,. MDrf 
STEAP-TL 


APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED 


U. S. ARMY LAND WARFARE LABORATORY 

Aberdeen Proving Ground, Maryland 21005 


11 



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20081017 391 
















The findings in this report are not to be construed as an official Depart¬ 
ment of the Army position unless so designated by other authorized documents. 

The contents of this report are not to be used for advertising, publication, 
or promotional purposes. Citation of trade names does not constitute an 
official endorsement or approval of the use of such commercial products. 

DISPOSITION INSTRUCTIONS 


Destroy this report when no longer needed. 


Do not return it to the originator. 




« 







UNCLASSIFIED 


SECURITY CLASSIFICATION OF THIS PAGE (When Ihitu 

’riterod) 


REPORT DOCUMENTATION PAGE 

RKAD INSTRUCTIONS 

BE!*ORK COMPLETING KORM 

1 REPORT NUMBER 

2. GOVT ACCESSION NO. 

3 RECIPIENT’S CATALOG NUMBER 

TECHNICAL MEMORANDUM NO. 74-12 



4 TITLE (and Subtitle) 

LWL GRIDS FOR PRODUCT IMPROVEMENT 
LWL FUEL TABLET 

TEST OF 

5. TYPE OF REPORT ft PERIOD COVERED 

Tech Memo for Period 

5 June 1973 - 7 Sept 1973 


6 PERFORMING ORG. REPORT NUMBER 

7. AUTHOR(.t) 

Frederick M. Drake 

Enviroment and Survival Branch 

8. CONTRACT OR GRANT NUMBER(s) 

9. PERFORMING ORGANI Z ATION NAME AND ADDRESS 

US Army Land Warfare Laboratory 

Aberdeen Proving Ground, MD 21005 

10. PROGRAM ELEMENT. PROJECT. T ASK 

AREA ft WORK UNIT NUMBERS 

LWL Task No. 09-S-73 

11. CONTROLLING OFFICE NAME AND ADDRESS 


12. REPORT DATE 

April 1974 



13. NUMBER OF PAGES 

8 

14 MONITORING AGENCY NAME ft ADDRESS (if different from Controlling Office) 

15. SECURITY CLASS, (of this report) 



Unclassified 



15a. DECLASSI FI CATION/DOWN GRADING 

SCHEDULE 

16. DISTRIBUTION STATEMENT (of this Report) 



Approved for public release; distribution unlimited 

17. DISTRIBUTION STATEMENT (of the abstract entered in Rlock 20, if different from Report) 

16. SUPPLEMENTARY NOTES 

TECHNICAL LIBRARY 

BLDG- 305 

ABERDEEN PROVING GROUND, MD« 
_ .STRAP-TI - 

19 KEY WORDS (Continue on reverse side if necessary and identify by block number) 

Grids, Heating 

Fuel Tablets 

Heating Combat Rations 

20. ABSTRACT (Continue on reverse side if necessary and identify by block number) 

The US Army Land Warfare Laboratory developed an experimental heat tablet of 
acetal resin for heating combat rations. To use this new fuel source effi¬ 
ciently and provide a support for the ration can or canteen to be heated, the 
LWL grid was developed. The grid was designed to give a one inch standoff 
between the ration can stove and the food can or canteen cup being heated. 

Field evaluations of the grid were generally favorable, although some comments 
by the users indicated the standoff height of one inch was too much. The 

CON'T_ 


DD , jan M 73 1473 COITION OF I NOV 65 IS OBSOLETE UNCLASSIFIED 


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fto - 1200x3 


DESCRIPTION 

A method was developed by USALWL where a combat ration can could be converted 
to a serviceable ration stove by use of a single grid. The grid was developed 
to be used with the LWL fuel tablet, although Trioxane fuel can also be sub¬ 
stituted . 

The grid is fabricated from C1018/C1020 mild steel, .0239 inches thick. The 
grid is die stamped to the configuration shown in Figure 1, then folded flat 
for ease of packaging and carrying. To use, the open end of the grid is 
spread to conform to the diameter of the ration can stove. Appropriate 
notching and tabs provide a stable positioning of the grid on the can stove 
to support a canteen cup or a ration can of food. The one quarter inch stand¬ 
off between the stove and the canteen cup permits a flow of air to the fuel 
for combustion and acts as a chimney, to release the products of combustion. 
This grid is essentially a throw-away item but can be reused a number of 
times. Directions on method of using the grid are shown in Figure 2. 


1 


£ (g£JO 



GRID 





























LWL FUEL TABLET 



DIRECTIONS 

Cut holes in small "C" ration can as shown, using can opener, 
knife, or bayonet. Holes must be approximately l/2 inch above 
the bottom of the can to retain melted fuel. Place fuel unit 
(two tablets joined to form an X shape) in can, light a match 
and drop into the hole in the center of the tablets. Open 
grid and place on can as shown in diagram. It requires 3 to 
4 minutes for the fuel to reach a maximum burning temperature 
and the fuel will continue to burn for another 7 to 10 minutes, 
depending upon wind conditions. 

Aluminum foil, shaped to form a dish capable of retaining the 
melted fuel, can be used in place of the ration can. 

NOTE: The fuel tablet will not flare up and therefore will not 

burn the user's hand. 


Figure 2. Directions for Use of Grid 


TECHNICAL LI3RABY 
BLDG . 305 

ABERDEEN PROVING GROUND „ 
STEAT-TL 































PRODUCT IMPROVEMENT TEST 


At the request of US Army Natick Laboratories, the US Army Test and Evalu¬ 
ation Command (TECOM) scheduled a Product Improvement Test of Fuel Tablet 
and Grid, TECOM Project No. 8-EI-215-000-001. Testing began 30 September 
1973 and is currently being conducted at the US Army Arctic Test Center, the 
US Army Tropic Test Center, and by the US Army Infantry Board, Ft Benning, 
Georgia. 

The US Army Land Warfare Laboratory supported this effort by providing 
50,000 LWL fuel tablets and 5,500 LWL grids. Results will not be available 
until completion of the Product Improvement Tests. 


CONCLUSION 

The Product Improvement Tests are still being conducted by TECOM. See 
TECOM Report for Project No. 8-EI-215-000-001 for results of the Tests. 


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