Table of Contents
Advertisement
Quick Links
The MKII is a CAD designed, CNC manufactured auto gyro sport flier.
The MKII is designed to be a very stable, forgiving auto gyro with great performance. It was designed and tested
to be capable of flying in winds up to 15 mph and to ROG (rotate off ground) for takeoff's. No hand launches
are needed with the MKII.
By using CNC equipment, design tolerances are very tight and performance is duplicated kit to kit.
We recommend seeking help from the local modelers in your area if you are inexperienced. Orientation could be
your toughest challenge.
FlyingBalsa, LLC guarantees this kit to be free of defects in both material and
workmanship at the date of purchase. This warranty does not cover any damage of
component parts by modification, use or shipping. In no case shall FlyingBalsa, LLC
liability exceed the original cost of the kit. Further, FlyingBalsa, LLC reserves the right
to change this warranty without notice.
In that FlyingBalsa, LLC has no control over the final assembly or material used for
final assembly, no liability shall be assumed or accepted for any damage resulting from
the use by the user of the final user assembled product.
MKII 'Humpback'
Instruction Book
Initial release (May 2012)
We hope you enjoy the MKII as much as we do.
Warranty
Motor
Eflite Power 25 or
Size
Power 32
Rotor
43"
Diameter
Length
36"
overall
Weight
54 oz.
Head
FlyingBalsa Gen III
Rotor
Aerobalsa high
Airfoil
performance SG6042
Direct rotor control
4 Channel
Pitch / Roll, Throttle
and Rudder
Advertisement
Table of Contents
Summary of Contents for FlyingBalsa MKII Humpback
- Page 1 Further, FlyingBalsa, LLC reserves the right to change this warranty without notice. In that FlyingBalsa, LLC has no control over the final assembly or material used for final assembly, no liability shall be assumed or accepted for any damage resulting from...
-
Page 2: Table Of Contents
Table of contents Table of contents........xx List of CNC machined parts....1 Kit Contents..........2 , 3 Suggested supplies and tools....3 Recommended equipment....... 3 Building........... 4 Horizontal stabilizer....4 Vertical stabilizer......4 Fuselage........5, 6, 7, 8, 9, 10, 11 Pylon.......... -
Page 4: Kit Contents
Documentation: 6 sheets 11” x 17” CAD drawings 1 Instruction book Blades: 3 each Aerobalsa high performance SG6042 CNC machined for blade bolt bushings and to fit the FlyingBalsa Generation III rotor head. CNC parts: See page 1 Hardware Bag: 1.. -
Page 5: Suggested Supplies And Tools
Other included items: 1..1/8 x 4 x 36 balsa for fuselage sheeting 1..3/8 x 3/8 x 12 balsa triangle for firewall and pylon reinforcement 1..Generation III head kit 1..Generation III gimbal kit 1..Du-Bro tail wheel bracket 2.. -
Page 6: Building
General construction notes: The CNC cut parts will have small 'tabs' on them when they are removed from their sheets. The tabs must be removed prior to use. Use care and do not sand or cut into the part while removing the tabs. The term “use thin CA glue”... - Page 7 3) Locate the two 3/16 balsa fuselage sides, the 1/16 plywood fuselage doublers, and formers F1 and F2. Start by gluing the doublers to the fuselage sides using 15 minute epoxy glue. Center the doublers vertically on the balsa sides. You may notice that the doublers are approximately 1/64”...
- Page 8 7) Install the former cage on the inboard side of one of the completed fuselage sides. The inboard side is the doubler side. Ensure the pylon support is towards the bottom of the fuselage. Before gluing the formers in place, ensure the former tabs are fully seated in the slots and use a square to ensure that F1 and F2 are perpendicular to the fuselage side.
- Page 9 10) The three 1/8” birch plywood hatch mounts are glued in place with 15 minute epoxy. The mounts fit into the notches of the fuselage doublers. Install each mount as shown in this photo and ensure they are flush or slightly below the top of the fuselage sides.
- Page 10 13) The landing gear torque blocks and 3/8” balsa triangle braces are installed next with 15 minute epoxy. This can all be accomplished at the same time. The torque blocks have a angle sanded in them to match the firewall down thrust.
- Page 11 16) Next you will be sheeting the bottom of the fuselage. All sheeting, top and bottom is installed cross-grain. Locate the provided 1/8” x 4” x 36” balsa sheeting. Sheet bottom of the fuselage from the aft side of the wire trap to the forward edge of the tail wheel bracket mount.
- Page 12 19) Continue sheeting the top of the fuselage stopping at the point where the horizontal tail will go. Remember, there is enough sheeting supplied with the kit to sheet the top and bottom of the fuselage but you cannot be wasteful with the wood.
- Page 13 23) Drill a hole at each end of the landing gear mount for the preformed landing gear. Use a #21 drill bit. Location is critical. See the CAD drawings for locations. Note that the holes are staggered! Drill the holes perpendicular to the fuselage bottom.
-
Page 14: Pylon
This completes the basic fuselage structure. Pylon Assembly: 26) You will need the parts shown in this photo: The pylon core, 2 each pylon forks, pylon spacers, pylon sides and the 1/8 birch dowel. The dowel will need to be cut in half and then both of those pieces cut in half again so that you have 4 equal length pieces. - Page 15 28) The pylon sides are simply glued to the pylon core using epoxy glue (one on each side of the core). To ensure the best fit, slide the pylon core into the pylon hatch and then screw the hatch to the fuselage. Make sure the pylon core is fully seated on the fuselage lower sheeting.
-
Page 16: Tail Installation
31) Cover the fuselage, horizontal stabilizer, vertical fin and rudder, and battery hatch with your favorite film covering. Ultracote was used on the prototype. 32) Using a #11 X-acto knife or equivalent, cut two rudder hinge slots in the vertical fin approximately 1/2” down from the top of the fin and up 1/2”... -
Page 17: Tail Wheel, Rudder, Main Gear
35) The tail wheel bracket assembly is attached to the fuselage with two #2 self tapping screws which are supplied in the hardware bag. Hold the tail wheel assembly in place with the wire firmly touching the rear end of the fuselage. Mark the location of the two screw holes and drill with a 1/16”... -
Page 18: Radio Installation
Radio Installation: 39) The rudder servo and connecting hardware is installed next. The servo mount is cut to fit a Hitec HS-85 servo. Simply install the rubber grommets and brass eyelets supplied with the servo and secure with the screws included with the servo. -
Page 19: Motor Installation
Motor Installation: 41) Install the motor on the firewall per the instructions included with your particular motor. It might be necessary to drill another hole in the firewall for motor shaft clearance. To help prevent possible motor battery damage in the event of a crash do not use motor mount screws that extend into the battery compartment more than 1/16”. -
Page 20: Rotor Head Installation
43) The completed rotor head assembly is installed next. Slide a #4 flat washer onto the gimbal shaft followed by a 1/4” long brass tube spacer. NOTE: Both brass tube spacers will need to be deburred before use. Now slide the head assembly onto the shaft. -
Page 21: Blade Balancing
Blade Balancing: 45) Your blades are shipped with each blade weighing as close to each other as possible, however, to prevent unwanted vibration the rotor head and blades assembly should be statically balanced. A statically balanced rotor assembly will allow the blades to remain at any position you select. An unbalanced rotor will not. -
Page 22: Flying
Flying: This section will cover flying your new autogyro. Since it would be virtually impossible to teach flying the gyro in a few paragraphs, we will mainly cover the highlights of what to expect. The main thing to remember is, if you are new to autogyro flight, once airborne orientation will be your biggest challenge! Until you are comfortable, it helps to have a spotter along to help you. -
Page 23: Contact Information
Thank you for purchasing the FlyingBalsa MKII Contact Information Website address – www.flyingbalsa.com For general information and ordering – flyingbalsa@bellsouth.net For technical support or parts – flyingbalsa@bellsouth.net Yahoo groups support forum - http://groups.yahoo.com/group/ptgyrosupport/ FlyingBalsa, LLC PO Box 1491 Collierville, TN...