Atch_B__RM6_Artillery_Specifications.pdf

POLICIES RELATING TO HISTORIC WEAPONS DEMONSTRATIONS — FINAL 2019

For Civil War:

1861 ORDNANCE MANUAL FOR THE USE OF THE OFFICERS OF THE UNITED

STATES ARMY and 1849 ARTILLERY FOR THE LAND SERVICE by Major Alfred Mordecai.

For earlier periods use:

AMERICAN ARTILLERIST’S COMPANION by Louis de Tousard or TREATISE OF ARTILLERY by John Muller or any other relevant source.

Tube will be cast using:

o Bronze — 88 parts copper, 10 parts tin and 2 parts zinc, o Gun Metal — 90 parts copper, 10 parts tin or, o Silicon Bronze — 82 parts copper, 14 parts zinc and 4 parts silicon.

The tube will be cast solid and bored. Core casting is not acceptable.

The bore will be free of gouges, holes, cracks, burrs or other imperfections. The bore will be of uniform diameter for its entire length. The radius of the breech will be one fourth of the diameter of the breech.

Vent and vent piece: For mid-19th century guns; the vent will be in a vertical plane passing through the axis of the bore and makes an angle of 80 degrees with it. The vent enters the bore at a distance from the bottom equal to one fourth of the diameter of the bore. The diameter of the vent will not exceed .2 inches. A removable vent piece made of “marine bronze” or copper will be installed as per the original manufacturer. For early period guns, installation of a vent piece is optional. The contractor will supply one replacement vent with the gun.

Barrel Markings: The barrel manufacturer will place their company’s identification stamp ONLY on the underside of the barrel between the trunnions or on the left rim base. Any additional stampings are at the discretion of the purchasing park.

Park will stamp the National Park Service property number on the right rim base.

Exterior finish: There will be no gouges, voids cracks, burrs or other imperfections on the exterior finish of the barrel. All traces of lathe marks will be removed, leaving a smooth finish suitable for polishing. The exterior finish of the barrel should be free of paint, lacquer or other composition.

OPTIONAL: On bronze guns an iron pendulum hausse sight base will be installed on the center top of the base of the breech, adjacent to the base ring, as per original manufacturer.

An iron front sight will be installed on the top portion of the muzzle swell, as per original manufacturer.

ATTACHMENT B - CASA Bronze

APPENDIX E — ARTILLERY SPECIFICATIONS

SPECIFICATIONS FOR REPRODUCTION BRONZE CANNON USED IN NATIONAL PARK

SERVICE HISTORIC WEAPONS DEMONSTRATIONS

* Gun shall conform in all principal dimensions and weights as specified period manuals.

Cannon SOW

Changes or substitutions: No changes or substitutions of materials or design shall be made without the written approval of the contracting officer after consultation with the park’s Historic Weapons Program Supervisor and a Regional Inspector.

Inspection and acceptance: The U.S. Government shall have the option of inspecting the gun at the contractor’s location or at the park site. The government shall have seven days to perform a final inspection, if the gun is delivered to the site. The contractor agrees to perform the necessary changes or the purchase order shall be cancelled.

Contractor’s Warranty: The contractor shall warrant all parts and labor for a period of two years from the date of acceptance of delivery. The contractor shall replace without cost to the U.S.

Government any part that fails due to manufacturing or material defect during the warranty period. All cost of transportation of the gun for repair covered by warranty will be at the expense of the contractor.

ATTACHMENT A - CASA Bronze Cannon SOW

SPECIFICATIONS FOR REPRODUCTION IRON CANNON USED IN NATIONAL PARK SERVICE

HISTORIC WEAPONS DEMONSTRATIONS

* Gun shall conform in all principal dimensions and weights as specified period manuals.

For Civil War:

1861 ORDNANCE MANUAL FOR THE USE OF THE OFFICERS OF THE

UNITED STATES ARMY and 1849 ARTILLERY FOR THE LAND SERVICE by Major Alfred Mordecai.

For earlier periods use:

AMERICAN ARTILLERIST’S COMPANION by Louis de Tousard or TREATISE OF ARTILLERY by John Muller or any other relevant source.

Tube must be cast of cast ductile iron.

Tube will be cast solid and bored. Core castings are not acceptable.

Liner o inch-thick D.O.M. (Drawn Over Mandrel) steel tubing for bore diameters less than 4 inches.

o ½ inch thick D.O.M. steel tubing for bore diameters greater than 4 inches

Tube will not be cast with the liner in place.

The bore of the liner will be of uniform diameter for its entire length.

Internal breech of the steel sleeve must consist of an appropriate radius steel plug threaded into place and secured in sleeve with a deep fillet weld around the circumference exterior surface of the plug.

Trunnion diameter not to exceed measurement of original design.

Where appropriate the tube will have lathe turned external finish.

Vent and vent piece: Where appropriate the tube will be vented with a brass or copper vent piece, as per the original guns. The vent will be on a vertical plane passing through the axis of the bore and makes an angle of 80 degrees with it. The vent enters the bore at a distance from the bottom equal to one fourth the diameter of the bore. The diameter of the vent will not exceed .2 inches.

Barrel markings: The barrel manufacturer may place their company’s identification stamp ONLY on the underside of the barrel between the trunnions or on the left rim base. Any additional stampings are at the discretion of the purchasing park.

Park will stamp the National Park Service property number on the piece.

Vent and vent piece: For mid-19th century guns; the vent will be in a vertical plane passing through the axis of the bore and makes an angle of 80 degrees with it. The vent enters the bore at a distance from the bottom equal to one fourth of the diameter of the bore. The diameter of the vent will not exceed .2 inches. A removable vent piece made of “marine bronze” or copper will be installed as per the original manufacturer. For early period guns, installation of a vent piece is optional. The contractor will supply one replacement vent with the gun.

Paint-minimum standards: one coat of metal primer and one coat of semi-gloss black, oil base enamel.

OPTIONAL: Sights or sight brackets are installed at the discretion of the park.

While not required, it is appropriate and park is encouraged to order a false muzzle of cosmetic rifling. The final ten or twelve inches of the steel sleeve at the muzzle should be cosmetically rifled as in an original tube of the type that is duplicated.

Changes or substitutions: No changes or substitutions of materials or design shall be made without the written approval of the contracting officer after consultation with the park Historic Weapons Program Supervisor and a Regional Inspector

Inspection and acceptance: The U.S. Government shall have the option of inspecting the gun at the contractor’s location or at the park site. The government shall have seven (7) days to perform the final inspection, if the gun is delivered to the site. The contractor agrees to perform the necessary changes or the purchase order shall be cancelled.

Contractor’s Warranty: The contractor shall warrant all parts and labor for a period of two years from the date of acceptance of delivery. The contractor shall replace without cost to the U.S Government any part that fails due to manufacturing or material defect during the warranty period. All cost of transportation of the gun for the repaired covered by warranty will be at the expense of the contractor.