Attachment_1-_Specifications.pdf

SPECIFICATIONS

REPRODUCTION BRONZE CANNON USED IN NATIONAL PARK SERVICE HISTORIC WEAPONS

DEMONSTRATIONS AT FORT STANWIX NATIONAL MONUMENT

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

* 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:

Bronze — 88 parts copper, 10 parts tin and 2 parts zinc, 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.

● 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 corrections required.

● 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.

Carriage Specifications:

Carriage constructed to proper fit of 6-pounder gun tube, with no binding of trunnions against the trunnion plate or cap squares or tube against the cheeks of the carriage.

6-Pdr Revolutionary War Grasshopper Carriage (Laminated Carriage, Trail not to exceed 2 beams) All lumber to be #1 Kiln-dried White Oak or Ash. Wood to be treated with copper naphthenate, two coats boiled linseed oil, one coat bonding primer, one coat oil base enamel, and Two coats 100% acrylic enamel. All metal parts to be either ductile iron or steel, treated with two coats of rust prim

All wooden parts of carriage to fit together evenly and cleanly, with no noticeable gaps.

Trunnion caps to fit over trunnions so that the plate runs parallel with the top of the carriage.

All metal parts fit snugly onto/into the wooden carriage.

A quoin or similar elevating device to be provided with the carriage.

The whole carriage to be painted to National Park Service specifications.

Ammo Chest for Grasshopper carriage that fits between the double brackets of the trails or mounted as side boxes on each side of tube.

Ammunition chest:

Interior is made of non-sparking materials

Nails are countersunk and puttied over

Lid fits snugly

Additional Equipment to be provided:

· Oak Sponge rammer staff, Sponge made of sheepskin. Synthetic sponge covers cannot be used.

· Iron worm or wad hook attached to oak shaft.

· Linstock

· Cartridge Former- sized to bore of cannon tube.

· Tampion (Muzzle Plug)- sized to bore of cannon tube.

· Leather apron (vent cover).

· Brass vent pick- sized to vent hole of cannon tube.

· Vent punch- sized to vent hole of cannon tube.

· Vent brush- sized to vent hole of cannon tube.

· Sponge bucket

Specifications for cannon implements:

Sponge Rammer:

Sponge head fits securely to staff

Sponge cover is oak-tanned sheepskin

Tacks are copper/brass and are not protruding

Rammer head fits securely to staff

Staff is free of cracks or splintering

Worm:

Worm head fits securely to staff

Staff is free of cracks and splintering

Linstock:

Linstock head fits securely to staff

Staff is free of cracks and splintering