The BK117 Bubble Cover encloses the entire canopy including the windshield, skylights, chin glass, front and rear doors, and side windows. The cover attaches at 4 points. At the upper rear corners the cover attaches to the boarding assist handles above and behind the rear side windows. Straps at the lower corners attach to the rear cross-tube. Attachment buckles are made of non-metal Delrin, designed for rugged outdoor use. Both the top and bottom hems of the cover have a special rope-hem feature with which they can be tightened to insure a perfect guarantee against abrasive chafing of the windshield. Pockets are sewn into the cover for the temperature probe and pitot tubes. The bubble cover is reinforced with patches at hinge points, door handles, and for the windshield wipers. For ease of installation, the bubble cover is color-coded (red=left, green=right) with color swatches sewn into the corners.

The Windshield Cover covers the windshield only, installing over the windshield wipers. The sides of the cover are specially made flaps which are inserted into the forward door jams. When the doors are closed the cover is tightly secured against the windshield. This cover is useful as a temporary aid against instrument and avionics overheating. It is also used to prevent frost or dew buildup on the windshield. The Windshield Cover weighs about 3 pounds.

Windshield and Bubble Covers are made of nylon Silver Laminate. Bruce's Custom Covers developed Silver Laminate especially for aircraft protection. The outer material is a medium weight nylon treated for ultraviolet resistance and anti-static buildup. The inner lining is brushed nylon tricot knit. Silver Laminate is extremely reflective. Tests show that the cabin interior temperature can be reduced by as much as 25 degrees. It is water, ice and snow repellent, yet it is breathable enough to allow moisture to escape from between the cover and the windshield surface. Silver Laminate contains no hydrocarbon compounds which can harm plexiglass windshields and acrylic finishes.

Skylight HeatShields are simple inserts designed to quickly and easily install on the inside of the cockpit skylights. This polyester film/foam laminate blocks about 98% of the Sun's rays. When unfolded, Reflectors have a stiffness similar to cardboard, but with much less weight and greater flexibility. This allows them to be installed beneath the skylight without any fasteners. Reflectors come with a cloth sleeve in which they can be rolled up and stored.

The Engine Cover encloses the intake, exposed rotor shaft area, engine air inlet and exhaust stacks. The engine cover forms a saddle over the entire engine area, and overlaps with the rotor hub cover. A Velcro closure seals the cover forward of the rotor shaft, over the forward air inlet. The engine cover attaches with straps to the front and rear cross tubes, and with another strap which goes under the tail boom.

Intake Plugs and Exhaust Covers are more practical where complete engine protection is not required. Intake plugs have zippers in the back to allow the foam pillow to be removed for easy cleaning. Exhaust covers are attached with a small metal spring-hook fastened to the ventilating grill forward of the exhaust.

The Complete Fuselage Cover is designed to enclose the largest part of the helicopter airframe. It is a one-piece design, enclosing the fuselage down to the struts and extending aft to the tail boom. To allow easy access to the cockpit while the cover is installed, a Velcro closure is placed on the side of the cover near the pilot's door. Depending on customer preferences and climatic conditions, a variety of materials and colors are available to choose from. For use in extremely rugged conditions, a synthetic woven material (UltraFab¨: a durable polyester/acrylic blend) is best. For the longest use in very hot and humid climates a dark color is preferable because it reflects ultraviolet rays much better. The Body Cover is lined in the location of the canopy plexiglass to prevent chafing. To aid in quick installation, it is color coded and marked in specific locations. The cover can be custom trimmed to allow for antennae, mirrors, brackets, engine or canopy heater ports, etc.

The Tail Boom/Stabilizer Cover is designed to overlap with both the fuselage cover and tail rotor/gearbox cover. It covers the entire tailboom, and the upper surfaces of the vertical and horizontal stabilizers. Made of Cordura nylon, this cover weighs about 6 pounds.

The Rotor Hub Cover overlaps with the blade covers and the engine cover to insure complete protection for the entire rotor hub system. It is made of Cordura nylon and fastens securely with Delrin buckles below each blade root. The rotor mast cover weighs about 3 pounds.

Blade Covers are sewn of medium weight nylon pack cloth. Cut "full" to avoid damage to trim tabs, blade covers can be installed from the ground with the aid of lightweight rope which is attached to the open end. Covers are cinched tight at the blade root with straps and Delrin buckles. A small opening at the tip of the cover allows for some air circulation and drainage. For operations in extremely cold weather, Cold Weather Blade Covers (PART# BCC-B117-410-1189) are fitted with full length zippers, and with "boots" designed to accept a pre-heater hose. Made of medium weight nylon, blade covers are available in a variety of colors and weigh about 6 pounds. A duffle bag is included.

Blade Tie-Downs are "socks" which fit over the blade tip with or without blade covers installed. Each tie-down is fitted with a generous length of rope. Made of Cordura nylon, tie-downs are available as a complete set, or individually. Blade tie-downs weigh about 1.5 pounds each.

The Tail Rotor/Gearbox Cover is a one-piece design which fits over the blades, hub and gearbox. Installing with the tail rotor in any position, the cover fastens with snaps along its bottom edge. A sleeve extends over the gearbox and tail fairing, kept snug with an elastic hem. Made of medium weight nylon, tabs have been sewn into the tips of the cover so that it may be tied down in high winds. The Tail Rotor Cover weighs about 1 pound.

The Tail Rotor Tie-Down is a simple harness assembly designed to secure the tail rotor in high winds. A small strap tightens around the lower blade while a larger belt goes around the tail rotor support fairing.

Pitot Covers are carefully sewn of durable red Naugahyde vinyl. Stainless steel staples strengthen the cover at stress points. A metal snap closure tightens the cover around the pitot base, and a "REMOVE BEFORE FLIGHT" warning streamer is sewn onto the bottom.

HeatShield Interior Reflectors are made of a special laminate of metallized polyester film and closed cell foam. Less than 1/8" thick, the reflector is stiff enough when flat to stand up against the windshield using the sunvisors and window framing only. On some designs Velcro fasteners are necessary. HeatShields roll up and store in a sleeve, yet retain a memory to be flat whenever they are needed. HeatShields are an excellent short-term remedy for cockpit overheating, but the Canopy Cover offers a more effective and practical solution.