Aero-Star 40 (oz10276)

 

Aero-Star 40 (oz10276) by Don Sobbe from Midwest 1987 - plan thumbnail

About this Plan

Midwest Aerostar 40. Radio control sport trainer model. Wingspan 62 in, wing area 675 sq in, for .40 power.

Discontinued kit from Midwest.

Direct submission to Outerzone.

Update 03/08/2018: Added kit review from MAN December 1987, thanks to JeffGreen.

Quote: "Field and Bench Review, Ron Farkas, MAN Dec 1987.

WHAT I LIKE MOST about the Midwest Aem-Siar is that it is not only a good vainer, it is also really distinctive-looking. While its configuration and force arrangement must have come right out of a standard trainer-design specification, the rakish slope of the forward fuselage gives it a unique appearance. It also featums a flashy color scheme and simulated window decals. The overall impression is that it could be the latest Cessna high-wing commuter airplane.

Despite its modern appearance, we find the traditional cabin-style fuselage with the wing locates well above the thrust line. The fuselage dimensions are such that there is a long nose and tail moment which improves pitch stability. The horizontal stabilizer is mounted low where it benefits from being fight in the wing downwash. Both the horizontal and vertical tail surfaces are adequately large for stabilization and control authority. The large constant-chord wing uses a thick high-lift flat-botiom airfoil for good, slow flight characteristics and a moderate amount of dihedral for self-righting ability. It is apparent that the Aero Star was designed by someone who knows what factors make an airplane a good trainer.

The wing assembly consists of the time-honored rib-and-spar construction with leading edge sheeting, spar webbing and full capstrips. The structure is often referred to as a D-tube because a cross section of the wing looks like the letter D. The tail surfaces are simply built from balsa sheet parts. For the fuselage, Midwest chose the modem technique of using die-cut interlocking light plywood parts that go together in a jiffy and produce a very rigid box structure. The ease of construction is further enhanced by the excellent instruction manual of one hundred pages or so which includes hundreds of clear illustrations.

The Aero-Star comes in two sizes - for engines in either the .40 or the .20 class. The .40 size, as reviewed here, has a 62-inch wingspan with 675 square inches of area and a weight in the 5 to 5-1/2 pound range. Specific engine recommendations are from .30 to .40 cubic inches for two-stroke engines or .40 to .45 for four-strokers„ For comparison, the .20 size Aero-Star has a 52 -1/2 inch wingspan.

Midwest has approached the issue of using three or for channels by giving the builder the option. The instructions and the plans show wing construction either with or without ailerons and all of the required materials are included for aileron operation. However, both versions call for the same amount of dihedral - which is rather moderate - leading this reviewer to believe that the designer favors the use of ailerons.

It looks like Midwest has made a big investment in the Aero-Star trainer and by doing so has provided the R/C beginner with the best possible model to start with. The design is well thought out, the kit is well engineered, and the material quality and parts fit are excellent The plans, instructions and..."

Update 22/09/2019: Added kit review from Flying Models, January 1989, thanks to RFJ.

Supplementary file notes

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Aero-Star 40 (oz10276) by Don Sobbe from Midwest 1987 - model pic

Datafile:
  • (oz10276)
    Aero-Star 40
    by Don Sobbe
    from Midwest (ref:159)
    1987 
    62in span
    IC R/C LowWing Trainer
    formers unchecked
  • Submitted: 15/07/2018
    Filesize: 1469KB
    Format: • PDFbitmap
    Credit*: JesseBartch

Aero-Star 40 (oz10276) by Don Sobbe from Midwest 1987 - pic 003.jpg
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Aero-Star 40 (oz10276) by Don Sobbe from Midwest 1987 - pic 004.jpg
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Aero-Star 40 (oz10276) by Don Sobbe from Midwest 1987 - pic 005.jpg
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