Inland Sport (oz2944)

About this Plan

Inland Sport. Rubber scale parasol model.

Direct submission to Outerzone.

Update 20/1/2023: Added article and some pics, thanks to mescal1 and his post on HPA see: hippocketaeronautics.com/hpa_plans... Note the article includes a further drawing, showing optional Townend cowl ring, also wheel spats.

Quote: "Inland Aviation was a product of the boom times of the late 1920's. A young engineer, Dewey Bonebrake, designed and built a trim little side-by-side parasol monoplane with a 40hp Wright-Anzani 3 cylinder radial and sold the design to a Kansas City businessman and sportspilot, Art Hargrave, who put up the cash to go into production of the Inland Sport. The Anzani was dropped in favor of the S cylinder LeBlond (60hp) in the 3-300 (priced at $3485) or the Warner Scarab Jr. 5 cylinder or the Scarab 7 cylinder in the 3-400 Super Sport version (price $5975). Forty six Inland's were produced from 1928 to 1931 before the company folded as another victim to the Great Depression.

As for the model, the one represented here - and so nicely redrawn by that master artist Bill Ceresa (of Massimo fame) - is an Inland Sport R-400 with a Warner 5 cylinder 90 horse job. Some of the Leblond S-300's and the Warner S-400's had a pointed nose with a spinner and sometimes a speed ring around the engine. A few sported big beautiful streamlined wheel pants. If your clever with a pen, you can convert these drawings to that version.

The model is 3/4 inch to the foot scale with all the wing ribs, tail ribs and fuse stringers. BUILD IT LIGHT! Construction is all 1/16 square longerons with 1/16 x 1/32 stringers. Formers are 1/16 and the nose and tail section are covered with very light 1/32 balsa. Don't forget the baggage door on the left side aft of the cockpit. Use firm balsa for the cabane struts and anchor them in the fuselage against the proper formers. The nose block is built up from medium sheets of 1/8 stock. Williams Brothers 3/4 in cylinders are perfect for the engine. Make the exhaust stacks and carb intake from polystyrene tubing. Cylinder heads and rocker boxes are balsa with pins for pushrods. Spend some time on the engine - it is the focal point of the model - don't forget the plugs, plug wires and instrument panel.

The wing has laminated leading and trailing edges and tips made from 1/16 x 1/32 balsa in 3 layers. Use split ribs with the bottom ribs made from of 5-71b 1/32 balsa tapering from 18 high at the LE to 1/16 high at the TE. Block up the leading edge by 1/16 before you start construction. The spar is from 1/16 91b balsa of the appropriate height. I added a few degrees of dihedral at the wing center and built dihedral into the wing tips. Sand the front section of the lower ribs to an upward swoop to blend into the leading edge for the proper semi-semmetrical shape.

Tail surfaces are laminated from 1/16 x 1/32 61b balsa. Fashion the tail skid from balsa, aluminum tubing and a basswood shoe. Landing gear is .032 wire covered with balsa. Cover the Inland with plyspan, shrink in 1/16 washout in the wingtips and dope with 2 coats of thin Sig low shrink dope on the fuse and thin laquer on the wing and tail surfaces. Don't forget the wing window and the airleron tubes that are visible in the window, and bond paper for the gas tank on the top of the wing. Don't forget the gas caps!

Assemble the Inland using pin joints for all the struts and at the top of the cabanes where they mate with the wing. Pay particular attention to the landing gear and shock struts. I used 2-3 degrees of incidence in the wing and 3 degrees of downthrust with 2 degrees of right thrust in the nose.

My Inland Sport has 70 sq inches of wing area and weighed in at 34 grams covered and doped. Flying weight with 4 strands of 5/32 FM grey rubber was 46 grams with an 8 in Peck prop. Average times were in the 45 second range. Both of the Inlands I've built flew very well with Brown CO2 engines and are a perfect bet for the new HiLine electric mini. Also, the Flyline kit of the Inland is perfect for Jumbo or schoolyard scale RC..."

Supplementary file notes

Article.

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