About the Boss Beaver

The Wipaire Boss Beaver was designed to be an entry-level turbine aircraft to move the piston operator into the turbine class at minimal cost, yet providing tremendous revenue-generating capability.  To accomplish this we felt a fuselage stretch and a larger tail would make the conversion too expensive.  Wipaire engineers believed if the fuel could be moved forward for balance purposes and the engine could be kept reasonably close to the wing, that the tail would not have to be enlarged.  It worked!  We ended up with a very slippery Turbine powered Boss Beaver, without a long snout and all the fuel contained in the wings where it is safest and best for the aircraft structure.

The Wipaire extended cabin and additional float compartment storage offset the larger cabin volume of the factory built Turbine Beaver.  With 650 HP worth of take-off power and the paddle blade otter prop, the Boss Beaver will break water at full gross in just over 965 feet with amphibious floats.  All fuel and engine systems are patterned after the highly successful Cessna Caravan, so transitioning to the next step will be a breeze.  The entire airframe was re-engineered (mostly to FAA 23 standards).


The Beech 18 vs. The Boss Beaver
The Wipaire Boss Beaver is slightly faster and has more useful load. Yes, the seaplane version of the WTB can cruise over 200 mph and carry over 2600 pounds of fuel and payload, while maintaining a fraction of the per-seat mile cost.
The Otter vs. The Boss Beaver
The Wipaire Boss Beaver can carry more payload on trips of over 400 sm miles and is capable of cruise speeds 50% faster.

Take your beaver from standard to spectacular

Shown above is the Wipaire "Flagship" Boss Beaver N100KL. On the left is this aircraft "pre-boss" on the right is the same Beaver with all the Boss modifications installed and a sharp new paint job. This beaver went from ho-hum to WOW. The STOL is incredible and the amphibious floats open a whole new world of destinations.


Avionics Panel in a Turbine Boss BeaverBoss Modifications Include:

  • Extended cabin (internally)
  • Modified panel (instrument)
  • Twin Otter paddle blade prop
  • Wet wing fuel (increased quantity to 210 gallons)
  • Gross weight increase to 6100 lbs.
  • Flow energizers on wings
  • Strakes at lead edge of stabilizer
  • Caravan fuel and electrical systems
  • Bleed air heat
  • PT6-20, -27, -28 or -34
Performance for the Boss Beaver

All performance maneuvers performed with aircraft at gross weight.

ENGINE PT6A-27 / -28 / -34
Max Cruise Speed 202 mph TAS
Vmo      187 mph IAS
Gross Weight  6,100 lbs.
Useful Load Amphibian  2,140 lbs.
Useful Load Seaplane   2,550 lbs.
Useful Load Land plane 2,992 lbs.
Seats seven + pilot
Take off w/ 6100 floats (amphibious) – land 740 ft.
Take off w/ 6100 floats (amphibious) – water 965 ft.
Max horsepower  650 (5 min.) / 550 cont.
Fuel capacity      227.5 U.S. Gallons
Range (max w/ 45 min. res. amphibious)   767 statute miles

All performance data is estimated and will vary with individual airplanes and numerous factors affecting flight performance.

  • Wipaire Turbine Boss Beaver
    Wipaire Turbine Boss Beaver