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

This 2007 Hall WH4 Harpoon, registration not provided, is an experimental/homebuilt aircraft based on a Beechcraft Baron B55 airframe and powered by a 725 HP Walter 601D turbine engine. With 7,500 hours total time on the airframe, it is one of only six such aircraft flying and has been maintained with annual inspections as a certified Baron, with the seller noting no expense was spared in its building, improvement, and upkeep. Performance is cited at 225-230 knots with a 1500-3000 fpm climb capability, and the aircraft is equipped with avionics, a four-place oxygen system, and auxiliary air-conditioning.

The listing emphasizes the...

Year
2007
Make
Hall
Series
B55
Model
WH4 Harpoon

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Specifications

Category
Experimental
Intended Use
Business, Recreational

Hours, Logs & Inspections

Total Time
7,500 hrs
Inspection Status
Fresh Annual To Be Completed 04/2026

Additional Equipment

Oxygen System

Four-Place O2 System

Air Conditioning

Auxiliary Air-Conditioning

Engine & Propeller

Engine Type
Turboprop
Engine Count
1
Engine Model
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