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2007 Hall WH4 HarpoonExperimental Aircraft • Port Saint Lucie, FL, USA

Presenting a 2007 Hall WH4 Harpoon, an exceptionally rare single-engine turbine conversion based on the Beechcraft Baron B55 airframe. This Experimental/Homebuilt aircraft, registration not listed, is one of only six flying examples. With a total time of 750 hours, the seller describes it as a build where no expense was spared and notes it has been inspected annually and maintained to certified Baron standards. The aircraft is currently undergoing its annual inspection, which the seller states would be an ideal time for a pre-buy.

Powered by a 725 HP Walter 601D turbine engine, this aircraft offers a claimed 225-230 knots cruise with a...

Year
2007
Make
Hall
Series
Baron
Model
WH4 Harpoon

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Specifications

Category
Experimental
Intended Use
Business, Recreational

Hours, Logs & Inspections

Total Time
750 hrs
Inspection Status
Currently getting its annual done

Additional Equipment

Oxygen System

Four-place oxygen system

Air Conditioning

Auxiliary air-conditioning

Engine & Propeller

Engine Type
Turboprop
Engine Count
1
Engine Model
Walter 601D
Engine Power
725 HP

Asking Price

$450,000

Aircraft Location

Port Saint Lucie, FL, USA

Listing Details

Used
For Sale

Price History

Mar 31, 2026: $450,000 - controller

Contact Seller

First Seen: Mar 31, 2026

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Asking Price

$450,000