“The Boomerang is a new high performance pressurized 5 place light twin intended for personal transportation. Its basic goals were to provide optimum performance from two turbocharged 200 hp Lycoming reciprocating powerplants. Probably one of the most difficult tasks faced in the development of this aircraft was explaining why I would design a configuration that is asymmetric. In fact, an early comment as the aircraft arrived at the Experimental Aircraft Association International Air Show at Oshkosh, Wisconsin this year, was from a fellow who ran up and remarked, “What in the hell were you smokin’ when you laid that one out?”
– Burt Rutan (1996)
In trying to explain how Burt Rutan developed the idea of the Boomerang, he used a step-by-step comparison of a “traditional” twin-engine aircraft (Beech Baron BE58) and his design.
Step-by-Step Comparison : Baron vs. Boomerang
Baseline Baron 58P
Left engine moved outboard to improve symmetry at low speeds and to reduce cabin noise.
Both engines moved inboard to reduce MCS. Right engine moved forward to clear fuselage. Left engine moved aft to balance.
Wing skewed to support engines and to reduce left engine interference.
Composite construction allows smaller, higher aspect ratio wing. but configuration is now nose-heavy, thus left wing is swept forward. This helps, but configuration is still nose-heavy.
The weight savings allows smaller engines and tail area can be reduced.
Higher aspect ratio tail flutter problem is fixed with nacelle boom. This allows additional baggage room in boom.
Right engine is moved to the fuselage to reduce weight, cost and drag. Lateral balance is restored by moving entire wing to the left. MCS is now well below stall.
Left engine is moved outboard to reduce cabin noise and to eliminate prop interference. Entire wing is moved left to restore lateral balance.
Twin small vertical tails improve low speed handling, reduce weight and allow low-drag pressure-recovery aft fuselage.
- Round fuselage, increased room.
- Laminar flow flying surfaces.
- Higher wing loading.
- Aspect Ratio to 13.2.
- Full-span camber control for aileron/flap/wing optimization
|3.8psi cabin||4.6psi cabin|
|6 seats||5 seats or 4 seats+1 bed|
|3% more span||15% wider cabin|
|84% more wing area||20% longer cabin|
|65% more tail area||92% more aspect ratio|
|59% more engine power||10% higher stall speed|
|62% more empty weight||45% more climb rate|
|13% more fuel||41 kt higher cruise speed|
|45% more gross weight||56% more range at 75%|
|92% more max range|
|Immune from MCS accidents|