The Dudley Kem WH4 Harpoon is a rare and distinctive aircraft, designed with unique styling and strong performance that makes it stand out among classic light aircraft. Discover Dudley Kem WH4 Harpoon aircraft for sale worldwide on AvPay. Browse active WH4 Harpoon listings and find available aircraft across the USA, North America, UK, Europe, Asia, Africa, Australia and South America. Connect directly with aircraft brokers, private sellers, flying clubs, flight schools and manufacturers. Explore the full inventory of aircraft for sale on AvPay here!
Finding a Dudley Kem WH4 Harpoon Aircraft for Sale on AvPay
AvPay is a global marketplace for the Dudley Kem WH4 Harpoon, a rare single-engine turboprop conversion of a Beechcraft Baron airframe. Buyers and sellers connect across the USA, North America, UK, Europe, Asia, Africa, Australia, South America, and beyond. Discover your ideal WH4 Harpoon in our active aircraft listings.
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As a leading aviation marketplace, AvPay features a wide range of aircraft for sale, including the Dudley Kem WH4 Harpoon. Explore our full Dudley Kem selection here, or browse all aircraft from various manufacturers here.
Found the right Harpoon? Contact sellers on AvPay via WhatsApp, private message, or phone to discuss pricing and specifications of Dudley Kem WH4 Harpoon Aircraft For Sale.
Interesting facts about the Dudley Kem WH4 Harpoon
✈ The WH4 Harpoon is an experimental, single-engine turboprop built from a Beechcraft Baron B55-series donor airframe.
✈ A Walter M601D turbine typically powers the type, delivering about 724–750 shp to an AVIA reversible propeller.
✈ FAA records show a four-seat cabin and single-engine, fixed-wing configuration registered in the U.S.
✈ Seller literature cites ~225–230 KTAS cruise and 1,500–3,000 fpm climb, depending on weight and setup.
✈ Some examples carry fiberglass tip tanks and modern Garmin glass, boosting range and situational awareness.
✈ Only a handful were completed; trade sources and brokers report roughly six flying examples worldwide.
Dudley Kem WH4 Harpoon Specifications
Information below is a guide only. Do not use it for flight planning or operations. Variants, modifications, upgrades, and age can change the details. Confirm exact specifications with the seller, the manufacturer, or the relevant aviation authority.
Length: ~8.53 m (28 ft) (Baron B55 airframe)
Wingspan: ~11.53 m (37 ft 10 in) (Baron B55 airframe)
Height: ~2.92 m (9 ft 7 in) (Baron B55 airframe)
Empty Weight: varies by build; experimental category
Max Take Off Weight (MTOW): up to ~2,313 kg (5,100 lb) typical of B55 donors
Powerplant: Walter M601D turboprop, ~724–750 shp
Rate of Climb: seller-reported ~1,500–3,000 ft/min
Range / Fuel: configuration dependent; some builds list ~136 US gal mains plus up to ~160 US gal in tip tanks (≈300 US gal total)
Avionics: many aircraft feature Garmin G3X/GTN glass upgrades
Useful Load (example): seller-reported up to ~2,157 lb on some builds
Get help buying a Dudley Kem WH4 Harpoon Aircraft
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Sell your Dudley Kem WH4 Harpoon Aircraft on AvPay
Do you have a Dudley Kem WH4 Harpoon Aircraft for Sale? List your aircraft on AvPay and reach buyers searching for rare turboprop conversions worldwide. AvPay is a Zero Workload Website, so our team handles updates. Every aircraft listing features on our Social Media Pages for extra visibility in front of our 190,000+ followers. Generate enquiries from your Aircraft Listings, your Aircraft Broker Profile, and each Service Listing you add to our Aviation Marketplace Pages. Let AvPay promote your Dudley Kem WH4 Harpoon aircraft for sale.
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