Lots of interior space allows the addition of some interior appointments for cruising comfort, and a large hull makes for a better ride in larger waters. This is the sev that cruised from Anacortes, WA to Juneau, AK, over 1400 miles.

With a hull size of 8 feet by 18 1/2 or 20 feet, Explorer is a scaleup of the Vanguard design, and uses a Subaru 1.8L EA 82 engine. Two aluminum frames automatically extend when the engine is started so this sev flies as if it were ten feet wide. (Note! The drawing shows the sev at flight configuration, 10 feet wide to the edges of the aluminum frames. It does automatically fold for highway trailering under 8 ft width.)

Using the same size engine and drive as Prospector, the efficient Explorer gives up very little in speed for a tremendous gain in payload. (Note, the North to Alaska Explorer had only a 1.4 liter engine!)

With a top over water speed of 39mph and fuel use of around 2.5 gallons per hour, this sev can cruise relaxed at 30mph plus speeds on just 70% power. This sev can haul over 1400lb payloads over big and small waters.

Plans and instruction manual are available for $65US, including first class postage, US, Can. Mex. (Foreign. add $3). Critical parts for Explorer such as propellers, fans, skirt material, drive hardware and foam for the composite hull construction are available from Sevtec.

Total cost of construction, including engine and critical parts kits for Explorer is $4300 to $9000, and some 650 to 1200 man hours.


Bryan Phillips and his 10ft X 20ft hulled Explorer.

(See Amphibious Marine for more images of this sev.).  Take a look as Terry Harrington, of West Lafayette, Indiana builds his Explorer.

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Three view drawing and Performance plots