The Renegade II and the Renegade Spirit
The Renegade II can be purchased as plans only, plans and partial kits, plans and raw materials, or in a quick build kit form. It features (only) the Rotax 503 engine, and a smooth sided cowl. Empty weights of the Renegade II tend to fall between 375 to 425 lbs. Weights for the Renegade Spirit which has the same basic airframe, but other powerplant options, run 420 to 520 lbs. Forward of the Spirit firewall there can be a Rotax 582 (65 hp.), or if you prefer four cycle, a Rotax 912 (80 hp.). The Spirit also features the nostalgic look of the rounded bump cowling that made antique aircraft like the Monocoupe famous. Depending on where you live, both versions of the Renegade might qualify for ultralight aircraft status.
The structure of the Renegade is a blend of old and new technology, it is a conventional strut and wire braced biplane of fabric covered all metal construction. Under the PolyFiber fabric you will find an aluminum truss fuselage that utilizes 6061-T6 aluminum tubing mated with a unique, custom designed extrusion. All fuselage members are blind-riveted with AVEX and stainless steel rivets. The larger diameter tubes provide a fuselage with very high strength and rigidity while maintaining light weight. A fuselage of equivalent strength and rigidity, but welded from 4130 steel would weigh more than twice as much. Because the structure is a blind riveted one, rather than welded, it is very easy for even an inexperienced person to check for structural integrity and make any necessary repairs. The use of square tubing wherever possible provides maximum contact between riveted parts as well as increasing bending strength.
All quick build kits feature assembled fuselage frames which are fabricated in precision jigs at the Murphy factory. If you opt for a quick build kit you do not need to construct any special jigs to build your Renegade.
The tail assembly is wire braced for the strongest possible structure with minimum weight. Doublers and crush tubes are used at all wire attach points. The doublers are used to increase bearing surface while the crush tubes allow the correct tightening of bolts without over stressing the tube structure. The tail group is made of aluminum tubes and channels that have an exceptionally high strength to weight ratio. Assembly is a simple matter of laying out the materials over full scale drawings that are provided for all the flying surfaces.
The wings of the Renegade biplane are the most impressive parts of the aircraft. Both wings are constant chord NACA 23012 Aerofoil sections. Sweepback of 10 degrees on the upper wing only. Dihedral of 3 degrees on the lower wing. Angle of incidence for both wings is 4 degrees. Front spars of rectangular 3 1/2" x l 1/2" extruded 606l-T6 aluminum tubing; rear spars of C section 606l-T6 aluminum alloy and stamped aluminum ribs are used with an aluminum sheet leading edge, giving smooth, firm shape to the wing. Durable interplane "I" struts and stainless flying/landing wires provide incredible strength and rigidity in the wings. Standard wing tips are made from pre-formed aluminum tubes with fibreglass wing tips optional.
All controls except for the rudder utilize push-pull tubes with rod end bearings, which provides precise and immediate response to control inputs. Rudder controls are standard aircraft quality stainless steel cables. Ailerons are built similar to small wings. A "D" cell built up from stamped ribs, pre-formed spar and leading edge provides a very strong but light weight aileron. The ailerons are friese type and differentially rigged which provide very crisp response with little adverse yaw. Dual control sticks and rudder pedals are standard as are heel brakes in the rear cockpit.
The landing gear of the Renegade is built to withstand a lot of abuse and rough handling. The shock cord (bungee) suspension system is one of the best ways to take those tough landings. The main struts of the aircraft landing gear are 606l-T6 square tubes with a wall thickness of 1/8", The drag struts are sleeved full length for extra security. In keeping with our goal that the Renegade should be repairable with a minimum quantity of tools and minimum skill level, the landing gear is an all bolted sub-assembly. The tail wheel is steerable and full swivel. High profile tires are standard for providing extra prop clearance if you prefer to make landings on river beds or in open fields.
High Quality Construction Methods
When purchasing an airplane, one of the most important things pilots are concerned with is the structural integrity of the craft. They like to know that they are flying a strong and safe machine they can trust. When comparing craft in this regard, the tale is told by the materials and construction methods.
Murphy Aircraft Mfg. Ltd. is proud to present one of the strongest and most structurally sound flying machines on the market today. By using aircraft quality materials and excellent fabrication methods, we have designed and built an aircraft which surpasses anything of similar weight and characteristics.
We are forever being asked questions about the construction techniques used in the Renegade as well as the design itself. There are many advantages and highlights of the Renegade which put it above the rest. This airplane is like no others on the market today. It is a combination of great looks and one of the most advanced designs.
The open cockpit biplane has a certain nostalgic eye appealing quality which is reflected in the Renegade and even more so in the Renegade Spirit. Pilots who have flown biplanes regard them highly for their outstanding performance and handling characteristics. Those same qualities have also been incorporated into the Murphy Renegade line.