INTRODUCTION Thank you for purchasing the BVM PNP L-39 Albatross. This model represents the latest in manufacturing technology and completion for the R/C jet enthusiast. The factory has expertly crafted and thoroughly inspected all aspects of the model. Only a small amount of work is required to complete the assembly of your L-39.
BVM Products Received with the Instruction Package that is sent from BVM Assembly and Operating Manual Package .020 Polyply Cockpit parts 1/4” Ply RX Battery Tray Heat Blanket Aluminum Tape 2.5” x 6” Jet Foam 2”x 4”x 0.8” Recommended Accessories You may have some of these products in your shop, but if not, refer to this list.
This enlarged opening in the left vertical plywood panel allows access to the very front of the model. BVM’s prototype has a Spektrum remote receiver mounted there with sticky back Velcro and also a piece of Jet-Foam helps hold it in place. If a few ounces of ballast is necessary, this would be a convenient location.
Also, a restraining strap is installed to keep the UAT in place. See later in manual. Apply a piece of fuzzy adhesive backed Velcro as shown to protect the servo extension wires below. BVM®2016 09/14/2016...
1/2 - 3/4 of fuel in the Header Tank. A Sullivan 16 oz. B.T. tank (with hardware) is available from BVM. (#PA-SR-0093) See Recommended Accessories page 3. Use the Perma-Grit pancake rotary cutter to grind the fuse flange joint and plywood former to allow the Sullivan 16 oz.
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The two top tubes accept fuel from the two main tanks. The third brass tube from the clunk line feeds into one brass fitting on the UAT. The length of the flexible clunk line is 3.25”. Header Tank is shown ready to install into model. BVM®2016 09/14/2016...
Apply a ZAP finish to the top side of the 1/4” ply battery tray to allow better adhesion of the white Velcro tape. This part is supplied with the BVM Instruction Manual Package. Drill (2) 1/16” holes just above the 1/4” ply tray.
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Apply prickly white Velcro as shown to the top surface. Matching fuzzy is applied to batteries. Route all battery wires forward and to the “right” side of the nose. BVM®2016 09/14/2016...
Cockpit The Fwd end of the cockpit is supported by this piece of Jet-Foam that is supplied with the BVM Instruction Manual Package. Secure with adhesive backed Velcro that attaches to the battery retaining strap. The aft end is supported by flanges of the fuse and 2 buttonhead screws as shown on page 12.
For the rear cockpit tub retention, glue the Polyply tabs onto the top side of the canopy fiberglass flanges. Drill 1/16” holes where shown. Use one button head screw per side to secure the Fwd. cockpit. BVM®2016 09/14/2016...
3. 16oz Header Tank (BVM # PA-SR-0093) Held in place with sticky-back Velcro. 4. BVM U.A.T. (BVM# 6044): Held in place with (2) 2-1/2” straps of 1/2” wide Velcro. Note how the straps are attached to plywood with (2) Button Head Socket Screws (BVM# 5625).
3 and 9 o’clock positions. #4-40 x 1/4” SHCS with nuts can replace the smaller factory installed phillips head screws. See next page. BVM®2016 09/14/2016...
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Enlarge the holes in the tailpipe with a #33 bit. Reinstall with the 4-40 parts as shown. Apply a drop of Z-42 to secure the threads. NOTE: Engine and Bypass must be removed to remove or install the tailpipe. BVM®2016 09/14/2016...
#IK6400-01. engine bypass system. If not provided by the factory, use Dremel tools to accomplish. Cut the aft end of the Bypass duct (lower half) such that the total length of the piece is 10” long. BVM®2016 09/14/2016...
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Scuff the inside aft section with medium sandpaper or a 3M #7447 red scuff pad. Brush-on 3 coats of BVM “Heat Shield” (BVM# PA-MA-1940). NOTE: A modeling heat gun will accelerate drying between coats. Drill (2) 3/32” holes in the bottom of Bypass to allow a fuel spill to drain out.
Overall view of the engine installation. It runs cool enough that the aluminum bell mouth and front few inches of the inner tail pipe are barely warm to the touch while the engine is running. BVM®2016 09/14/2016...
Reinstall the (4) screws to secure the servo to the stab. Apply a drop of BVM “Dry lube” (BVM # 1947) to both aluminum / plastic ball linkages. NOTE: Do this for all metal-to- metal or metal-to-plastic linkages on the model.
Cut a 3-1/2” x 5” piece of BVM Heat Blanket (BVM # 1710 ). Apply 1” x 6” strips of aluminum tape as shown. A 3/8” x 3/8” x 10” wood stick (make from scrap) is used to space the heat shield off the stainless steel tailpipe.
Use a safety clip or tape around the servo connection to secure it. Connect the rudder servo lead to the extension coming out of the fuselage; use a safety clip or tape to secure the connection. BVM®2016 09/14/2016...
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Use a 9/64” hex driver. An 8-32 x 3/4” SHCS secures the front of the fin from the inside of the model. Start the screw by hand, then use a 9/64” “L” wrench to snug it tight. BVM®2016 09/14/2016...
Apply air pressure to the nipple to push “O” Ring out then pinch with fingers while prying the “O” Ring off the disc with the wood stick. Apply “O” Ring lube (BVM # 1945) to the “O” Ring and massage thoroughly to fully “wet”...
Apply Axle Lube (BVM #5784) to the steel axle and bronze bushing. Use a 2mm “L” hex wrench to secure the axle in the landing gear strut. Apply the brake tubing and check for proper function. Pneumatic Line Identification at Wing Root ...
70º deflection. Use them for slow fly-bys and on final approach and landing. There is no elevator trim change required. Lubricate the linkages with BVM Dry Lube. BVM®2016 09/14/2016...
A flush mounted vent system is used on both the fuel and smoke systems. A magnetic vent plug with red “Remove Before Flight” tag and BVM Overflow/Taxi tank (Tank Not Included) conversion fittings are provided. Also listed in the “Recommended Accessories”...
Speed Brake 70º open Note: The BVM Demo plane is setup using the above Expo percentages. Positive values are used on Spektrum and JR radios, Futaba uses negative. NOTE: This chart reflects only medium rates for the ailerons, elevator, and rudder. Higher rates and expo settings are at pilot’s discretion but not necessary for safe aerobatic flight.
-------- DX18 and DX18QQ Transmitter File The BVM Demo models are setup on Spektrum DX18 transmitters. The file included on the SD card has all the mixes, rates, expos, and settings done for you. Setting the sub trim and travel adjustment must be accomplished by the modeler for the specific aircraft. Each aircraft is tested at the factory using a similar program.
Flight Time – There is 9 minutes of fuel on board. The BVM demo model’s transmitter timer was set for 6.5 min for a “Top Gun” routine. On the first flight, land a few minutes early to check fuel consumption. Adjust the flight timer accordingly.
(2) Hex Head Bolts and a 5.5mm open end wrench on the nuts (aft side). Slide wing on to test alignment. Use a glue syringe (BVM#PA-SR- 0072) to apply Aeropoxy to the perimeter of the Bracket-to-Former joint and to assure that the nuts on the aft side of the bulkhead stay affixed.
Bob Violett 2016 It has been a practice at BVM to operate our turbine engines a bit more conservative then the manufacturers published limits. Most recently, we applied this practice to the PNP L-39 Albatros powered by a KingTech K-140G.
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