Originally posted: Sat, 13 Jan 96 11:35:05 -0500
By: James Crouchet <jtc@io.com>
Original posting is available.

SCHLDGER SAFETY TESTING

01/12/96 [FLEX] [PUNCH] [NOTE] [CREDIT]

These tests were designed to compare practice schldger blades with other fencing blades commonly used in the SCA and against various protective gear to provide data on which to base safety regulations for the use of practice schldgers in the SCA.

BLADE FLEX TEST

It has become apparent that different schldger blades flex with different amounts of pressure. Though there is a rating system (0= Lightest to 3 = Stiffest) many blades are not marked and those marked are inconsistent. One source, Malcolm the Scott of Scotty Armory, explained that the blades come from several different forges in Germany and that even within one forge they are not always consistent. This test was designed to give us enough data to allow us to build a consistent rating system for practice schldgers.

In addition, one of the major concerns about practice schldgers has been over the amount of blunt trauma they will inflict, relative to other fencing weapons. By charting the flex of other weapons we were able to gain a basis for comparison.

METHODS

This test was conducted by gripping the hilt of a weapon, placing the point against a spring scale and pressing until the blade flexed about 6 inches from true. We discovered that once a blade flexes past the first 2 to 3 inches the amount of pressure does not increase appreciably (perhaps one pound) until the blade reaches a bend of 18 inches of so. Our measurements were taken in this "plateau area". In addition, we had a practice schldger break during another set of tests we were doing, so we re-measured the flex after breakage and listed that on the chart as well.

RESULTS

The following chart shows the results of our tests. Some weapons, particularly those with permanent curves in the blade, required more force to bend in one direction than in the other. We expressed these two numbers as a range (i.e. 4 - 5 Lbs.).
Weapon    Date      Weapon     Force to Flex
Number   Tested      Type         In Lbs.
  F1    01/07/96     Foil           3
  F2    01/09/96     Foil           3
  F3    01/09/96     Foil           3
  F4    01/11/96     Foil           3
  F5    01/07/96     Foil           4
  F6    01/07/96     Foil          4-5
  F7    01/09/96     Foil          4-5
  F16   01/09/96     Foil          4-4.5
  F8    01/09/96     Foil        4.5-5
  F9    01/09/96     Foil        4.5-5
  F15   01/09/96     Foil        4.5-5
  F18   01/09/96     Foil        4.5-5
  F19   01/09/96     Foil        4.5-5
  F10   01/07/96     Foil        4.5-5.5
  F11   01/09/96     Foil           5
  F12   01/09/96     Foil          5-5.5
  F13   01/09/96     Foil          5-6
  F14   01/09/96     Foil          5.5
  F17   01/09/96     Foil        5.5-6
Average Foil: 4.5
  D1    01/07/96     Dagger        2-3
  D2    01/07/96     Dagger        2-3
  D3    01/09/96     Dagger        2-3
  D4    01/09/96     Dagger        3-4
Average Light Dagger: 2.8

  D5    01/11/96   Prier Dagger    8-10
  D6    01/09/96   Prier Dagger  9.5-14
  D7    01/09/96   Prier Dagger     11
D8 01/07/96 Prier Dagger 12-15
Average Prier Dagger: 11.3

  E1    01/09/96      Epie       5.5-6
  E2    01/07/96      Epie         6-7
  E3    01/09/96      Epie         6-7
  E4    01/09/96      Epie         6-7
  E5    01/07/96      Epie         6-9
  E6    01/09/96      Epie         6.5
  E7    01/09/96      Epie       6.5-7.5
  E8    01/09/96      Epie         7-7.5
  E9    01/07/96      Epie         7-8
  E10   01/09/96      Epie         7-8
  E11   01/09/96      Epie       7.5-8
  E12   01/07/96      Epie         8-9
  E13   01/11/96      Epie         8-10
Average Epie: 7
  M1    01/09/96    Musketeer      14
  A1    01/11/96    Antir Rapier+   6
  S1    01/07/96    Schldger        9
  S2    01/09/96    Schldger(2)    10.5
  S3    01/07/96    Schldger       11
  S4    01/07/96    Schldger       12
  S5    01/09/96    Schldger       13.5
  S6    01/07/96    Schldger       16
  S7    01/07/96    Schldger(3)    26
Average Schldger: 14
  S6*    01/07/96  Broken Schldger  23
+ Antir Fiberglass rapier, 5 years old. They now make them stiffer.
* This is the same blade as S6, above, after 4.5 inches broke off the end. 
(N) The numbers in parentheses indicate this number was stamped on the Schldger blade.

CONCLUSIONS

Most practice schldgers we tested fall in the 9 to 16 pound range. The notable exception to this was a blade that registered about twice that at 26 lbs. Most of the fighters who have inspected the 26 lb. blade (this includes Dons, Cadets, non-scarves and various marshals of fence from a variety of kingdoms) felt that it was too stiff to be safe. Those looking over the 16 lb. blade felt it was marginal.

Another observation was that the lighter schldgers have about the same flex as the stiffer epies, and schldgers of medium stiffness equate to musketeer blades. Although we have no proof that the stiffness of the blades correlates to the likelihood of inflicting blunt trauma damage it does seem logical to assume they are related.

We also noted that when one of our blades broke the stiffness increased markedly. With the loss of only 4.5 inches from the end of the blade the flex rose from 16 lbs. to 23 lbs. -- an increase of 7 lbs.

RECOMMENDATIONS

I believe we should set a limit, not allowing the use of blades that require more than 15 lbs. to flex. Given this limit I feel the only areas where we need to worry about additional blunt trauma are the head and neck. In addition, any blade that breaks or is cut shorter should be retested for flex before being allowed back on the field.

PUNCH TESTS

This test is designed to determine what sort of material is necessary to prevent a blade from punching through a fighter's protective garments. I checked with Tivar to find out how the original punch tests for foils were conducted. Using the same methodology I recreated those tests with schldger blades. This was done on two separate occasions and at the second one Robin of Gilwell assisted me and also provided broken foils and epies for comparison.

METHODS

To perform the tests the material was laid out on soft ground. The tester knelt and gripped the blade in both hands (wear gloves) about a foot from the end of the blade with the blade end projecting downward so he could deliver downward stabs. He then delivered several forceful blows to the material, trying to punch through it. This method should deliver a blow that is more forceful than any blow a fighter might face on the field. Thus if the material holds up to this test it should be adequate on the field.

One of our schldgers broke during testing, allowing us to perform our tests with an actual broken schldger. I have been told by several sources that schldgers break flat and even and in fact when the blade broke it was indeed flat and almost as strait as a machine cut. Because the corners were somewhat sharp we performed additional tests to determine if that would be a problem.

Alternate testing methods were used to gather additional data. To determine what protection a single layer of trigger provides we grasped unbroken practice schldger blades by the hilt in a standard fencing grip and thrust at the cloth. To test the reliability of the HTM rubber rabbit blunts we are using as protective tips we placed one on a practice schldger, unmodified from how it came from the manufacturer (a slightly pointed tip) and then thrust against 1 layer of trigger (to keep the tip from sinking into the ground) laid on soft ground.

RESULTS

In the special tests we found that one layer of trigger provides very little protection as even a thrust of medium strength with an untipped schldger penetrated easily. The Rabbit blunt, however, was not penetrated in our tests in spite of the slightly pointed blade (as from the seller) and very hard thrusts.

In the material punch tests we found that an untipped or broken schldger could penetrate 4 layers of trigger, though it would not do so every time. Penetration occurred about 1 out of 3 to 1 out of 4 hits. With 5 layers of trigger we did punch through once using our stiffest blade, but could not repeat it with the other blades. Six Layers was proof against the schldgers.

By contrast, we were not able to penetrate 4 layers of trigger with a foil and only once with an epie.

I have also heard of "old trigger" and "new trigger". Supposedly, the old trigger was stouter and the new trigger is thinner and less resilient. By chance the first test was performed with new trigger purchased in 1995 to conduct the test, and the second test was performed with old trigger that Don Robin had left over from a garment he built years ago. Both were in like -new condition. The results of the two tests were virtually identical, even to the single penetration of 5 layers by the stiff schldger. While this does not prove that there are no variations among different manufacturers it does show that in this case there was no significant difference between old trigger and new trigger.

We tested leather as well, testing both 3-4 oz. leather and heavier 4-5 oz. leather. Both were suede, not top grain. The 3-4 oz. was not penetrated by the foils and epies, but the schldgers did penetrate a few times. The 4-5 oz . leather was not penetrated by foils, epies or schldgers.

The shape of the end of the schldger blade also made a difference in how easily the blade penetrated. the four blade ends were:

  1. mostly rounded, but with a slight point (many blades come this way)
  2. fully rounded ( some blades come this way)
  3. broken end, flat but slightly sharp on the edges and end cut flat and lightly filed to remove burs and sharp edges.

Blade end #1 penetrated the most easily, as one would expect. However, blade end #2, the rounded end, also penetrated fairly easily. The flat broken end (#3) did not penetrate as easily, nor did the #4, the flat smooth end. The main difference between #3 and #4 was that the sharper cornered #3 end scarred the materials more -- actual penetration was the same.

We were concerned about the sharp corners of end #3 so we conducted tests striking at an angle so the sharp corner would hit the material first. Scarring increased, indicating that a fighter might have been scratched through a single layer shirt or similar clothing, but actual penetration decreased markedly.

Stiffness of the blade also seemed to play a part in penetration. Given the same type of blade end, the stiffest blade penetrated most easily.

CONCLUSIONS

From the punch tests it is apparent that while 4 layers of trigger usually stops foils and epies, 5 layers is needed to reliably stop an untipped or broken schldger. The idea that one layer of trigger will stop an untipped schldger is clearly an unfounded myth.

The fact that a stiffer blade penetrates more easily would seem to be one reason for limiting the stiffness of blades allowed on the field.

The sharp corners on a broken schldger blade may cause scratches and other superficial damage to a fighter, but should not be a factor in serious or life threatening injury.

The flat, smoothed blade end (#4) seems to be the safest of those we tested.

Schldgers, whether untipped or broken, clearly penetrate more easily than do broken foils. While a foil that has lost or punched through it's rubber tip is not particularly dangerous, a schldger that has lost it's tip is a real hazard.

The HTM rabbit blunts hold up well. Although, like any tip, they will eventually wear out the thick rubber in the head (we measured it -- 1/8 inch ) should protect well for a long time.

RECOMMENDATIONS

Five layers of trigger or 4-5 oz. leather would seem to be a reasonable standard for impenetrable material to use with schldgers, but a better idea would be to punch test each garment separately. The use of a "testing square", a piece of cloth or leather made from the leftovers from making the garment and have exactly the same number and types of layers, would be acceptable. If the testing square passes, the garment should be considered to have passed.

HTM rabbit blunts should be the standard tip for use on schldgers. Before any other tip is passed by the marshalate it should undergo similar extreme testing. Under this tip I recommend a strip of 4 oz. leather be used to tighten the fit and to help insulate the rubber from wearing against the metal blade end. The tip should be inspected separately as it is so critical here. A good inspection would be to examine the tip for wear, then grasp the blade with one hand, the tip with the other and give it a few firm tugs to assure it will stay in place.

Schldger blade ends should be required to be cut flat, then lightly filed to remove sharp corners and edges. Rounded and pointed blade ends should be prohibited.

The stiffness of schldgers allowed on the field should be limited, in part to reduce the risk of penetration from an untipped blade.

Author:Don Savian (James Crouchet)

Original Greeting Message

Greetings From Don Savian Dori, Heavy Rapier (Schlager) marshal for Ansteorra.

I am posting this information for those who are interested. These are the results of several tests conducted over the past month. If you do have an interest, please feel free to comment to me at jtc@io.com.

Note: Maintainer reformatted and removed personal notes found in the original posting. Original document is available without any modifications.


CREDITS

Blade Flex Testers:
Don Savian
Don Robin of Gilwell
Don Alaric Greythorne
Lord Collin Bevins, Cadet to Don Iolo
Aethelyan of Moondragon

Punch Test Crew:
Don Savian
Don Robin of Gilwell
Don Alaric Greythorne
John Hidalgo

Additional Blades Provided By:
Armory of the Barony of Bryn Gwlad
Doqa Gwenneth
Lord Antonio Bastiano, Cadet to Don Alden
Lord Otto, Cadet to Don Savian
Lord Dave de Menthe
Lord Collin Bevin
_________________________________________________________________
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Transarc, 707 Grant St., Pittsburgh, PA 15219 groff+@transarc.com
Last modified: Tue Jan 16 18:05:33 1996