SIG MAYHEM 40 Manual Download Page 18 | Manualshive

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SIG MAYHEM 40 Manual Download Page 18

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SPECIFICATIONS:
Engines:

.40 to .46

2-Stroke

.52 to .70

4-Stroke

Wing Span:

54-1/2 in.

(1384 mm)

Wing Area:

746 sq. in.

(48.1 sq. dm.)

Length:

49-1/2 in.

(1257 mm)

Flying Weight:

4.5 to 5 lb.

(2041 to 2268 g)

Wing Loading:

13.9 to 15.4 oz. per sq. ft.

Radio:

4-channel with 5 servos

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Summary of Contents for MAYHEM 40

Page 1: ...perly assembled powered and flown the MAYHEM 40 can take you into the exciting world of 3D aerobatic flying Generous wing area lightweight construction and huge control surfaces with large amounts of travel enable the MAYHEM 40 to perform the extreme 3D maneuvers you ve been reading about hovering harriers waterfalls blenders the MAYHEM 40 can do them all NOTE The MAYHEM 40 is not suitable for beg...

Page 2: ...uel Tank Assembly 1 260cc 8 8 oz Plastic Tank 1 Rubber Stopper 1 Metal Front Clamp 1 Metal Rear Clamp 1 M3 x 19mm PH Clamp Bolt 1 Metal Clunk Pickup 1 Fuel Pickup Tubing for inside tank 1 118 od x 1 9 16 long Aluminum Tube 1 118 od x 2 long Aluminum Tube 1 118 od x 2 3 8 long Aluminum Tube 1 bag 2 1 4 Dia White Spinner Assembly 1 Plastic Spinner Cone 1 Plastic Spinner Backplate 1 Plastic Prop Shaf...

Page 3: ... it cools Note When trying to remove a warp an extra set of hands are needed Have someone assist you While one person holds the reverse twist in the control surface the other person applies the heat by passing a covering iron over both sides of the part WING ASSEMBLY OVERVIEW The wing of the MAYHEM comes in two pieces a right wing panel and a left wing panel which will be permanently glued togethe...

Page 4: ...ugh the wing panel until the plug on the end of the wire comes out of the opening in the servo bay Be sure you don t pull all of the Y Harness inside the wing leave the other two plugs of the Y Harness outside at the center of the wing Note You may occasionally feel like the wire has become stuck inside the wing This is simply the plug on the end of the servo wire hitting the side of the holes in ...

Page 5: ... smears on the plastic covering don t worry about them right now Once the glue is dry you can clean the glue smears off the covering with CA Debonder 5 Allow at least 10 minutes before flexing the aileron After sufficient time has passed flex the aileron up and down several times At first you might notice a little stiffness in the joint This will go away after the hinges have been flexed back and ...

Page 6: ... step Once you have the horn properly located mark the location of the two control horn mounting holes onto the aileron Drill a 1 16 dia hole completely through the aileron at each mark 3 Mount the control horn in place using the Nylon Retainer Plate on the top side of the aileron and two M2 x 15mm Phillips Head Bolts 4 Repeat the last three steps to mount a control horn on the other aileron 5 Not...

Page 7: ...g the two 1 4 holes in the plate with the holes in the wing before the glue dries Make sure there is no excess glue inside the holes If necessary run a 1 4 dia drill bit through the holes after the glue is completely dry 5 Now permanently glue the Fuselage Bottom Fairing onto the bottom of the wing with thick CA or epoxy glue Let dry 6 a Bolt the wing back in place on the fuselage Locate the two F...

Page 8: ...gest using a little thread locking compound Loctite on the mounting bolts to keep them from coming loose Note This kit DOES NOT contain bolts for mounting your engine to the engine mounts That s because not all of the engines that can be used in the Mayhem use the same size bolts Some engines may need 4 40 size bolts while others may need 6 32 You will need to go to the hobby shop to obtain the co...

Page 9: ... cowl Mount the cowl to the fuselage with the four M2 6 x 8mm PWA Screws provided 4 Determine what size and shape opening you will need in the cowling to accomodate your engine s muffler Then cut the opening in the cowling starting small and gradually opening it up to the final size Note As you can see in the next photo the cutout for the YS 63 muffler in our photo model was a fairly simple 5 8 wi...

Page 10: ...r is easy to assemble If the diameter of your engine s prop shaft is smaller than the hole in the spinner backplate select a prop shaft adapter to fit If your prop shaft is larger than the hole in the backplate the hole can be drilled larger to fit use drill press Install the backplate and your propeller tightly onto your engine using the engine s prop nut and washer Snap the spinner cone in place...

Page 11: ... screws that came with the servo 2 Mount a control horn on the BOTTOM OF THE LEFT ELEVATOR Locate the horn at the inboard end of the elevator directly in line with the elevator servo The front edge of the horn s base should be located right at the front edge of the elevator s leading edge bevel Once you have the horn properly located 7 The fin can now be permanently glued in place on the fuselage ...

Page 12: ...h the engine s carburetor throttle arm From the front insert the 3 16 od x 11 3 8 long Plastic Pushrod Sleeve through the firewall 12 mark the location of the two control horn mounting holes onto the elevator Drill a 1 16 dia hole completely through the elevator at each mark Mount the control horn in place with the Nylon Retainer Plate on the top side of the elevator and two M2 x 15mm Phillips Hea...

Page 13: ...ce of foam rubber between them as shown in the next photo For the receiver antenna we drilled a 1 16 dia exit hole in the right fuselage side at the receiver position The antenna goes through the hole and is string back to the tail of the airplane We and back into the fuselage Notice that there is a slot cut in the first fuselage former behind the firewall for the pushrod sleeve to go through This...

Page 14: ...ur MAYHEM with normal control throws before attempting 3D rates FUEL TANK INSTALLATION 1 Assemble the fuel tank as shown We recommend that you plumb your tank with a standard 2 tube setup One of the tubes is the vent line through which you will fuel and defuel the tank The other tube is the fuel feed line to the carburetor Note that the rubber stopper for the tank has two holes that go all the way...

Page 15: ...a dry cloth Squeegee repeatedly to get as much of the water out from under the decal as possible BALANCE THE MODEL While all airplanes must be balanced to achieve flight the balance of an aerobatic airplane like the MAYHEM 40 is especially critical The final placement of the longitudinal Center of Gravity or Balance Point will have a great effect on the aerobatic performance of this airplane Balan...

Page 16: ...s you gain confidence Take the MAYHEM to a safe altitude and throttle the engine back to idle This will give you a good idea of the glide characteristics While still at idle steadily increase up elevator to get a feel for the stall characteristics Stalls tend to be very gentle with the nose dropping straight ahead with little tendency to drop a wing This is great information to have when set up fo...

Page 17: ...e and land the airplane Check all servo mountings and pushrod linkages before flying again If a control surface flutttered once it will flutter again under similar circumstances In general some of the things to look at when trying to cure flutter are Loose servo mounting screws or deteriorated rubber grommets Excessive hinge gap Weak or loose control horn Weak or flexible pushrods Poor fit of R C ...

Page 18: ...0 to 46 2 Stroke 52 to 70 4 Stroke Wing Span 54 1 2 in 1384 mm Wing Area 746 sq in 48 1 sq dm Length 49 1 2 in 1257 mm Flying Weight 4 5 to 5 lb 2041 to 2268 g Wing Loading 13 9 to 15 4 oz per sq ft Radio 4 channel with 5 servos ...

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