PT-40 MkII (oz10911)

 

PT-40 MkII (oz10911) by Craig Golema from Great Planes 1996 - plan thumbnail

About this Plan

PT-40 MkII (Perfect Trainer). Radio control sport trainer model, for 40 power. Wingspan: 60 in, wing area: 672 sq in.

Discontinued kit from Great Planes.

The original PT-40 (oz8015) was a Stu Richmond design, published by RCM in 1985. This here is the MkII kit by Great Planes, and has a credit on it to Craig Golema as the designer.

Complete kit manual (64 pages) is available online at http://www.greatplanes.com/airplanes/gpma0118.php along with part listing, technical data.

Update 29/03/2020: Added kit review from RCM March 1998, thanks to RFJ.

Quote: "RCM Product Review. PT-40 MK II, Great Planes Model Mfg. By Mike Lee.

In the world of R/C training aircraft, there are many dozens of examples of planes that claim to be trainers, and some truly are. Because of advances in construction techniques and kit design, the truly good models often get updated to reflect better performance and easier construction for the builder. The subject of this review is one such design, the Great Planes Perfect Trainer 40, Mark II.

The newer MK II version makes the mark by improving on the structural side as well as the performance side of flying. The wing is stronger with a modified 'D' tube construction that also features shear webs and formed leading edges. You may build it in two versions, with the first being a pure trainer type wing with increased wing dihedral and a rubber band attachment to the fuselage. The second version of the wing is a sport version, this being flatter and sporting a bolt-on wing. Either version may use ailerons; however, the PT-40 is easily flown on rudder with elevator and throttle.

Other improvements include a stronger yet lighter fuselage, self-locking alignment, and sporty looks. Hefty landing gear wire increases the aircraft's ability to sustain heavy landings, and the radio equipment tray is made to accommodate the most advantageous location for balance within the fuselage. Let's look at how the plane is constructed.

Construction: The kit is contained within a colorful box measuring 40 x 8 x 5 in, making it easily shipped by UPS. Inside, the wood is securely nestled and banded or bagged for safe transport. The plane is constructed from balsa, lite plywood, and a couple of dense plywood parts. Most all parts are die-cut and the quality of the die-cutting is quite good. Care must be taken in the case of the die-cut plywood, as it just about falls from the cut sheets on contact. While this is not a problem in the integrity of the wood, it may be confusing when it comes down to parts identification.

Both full-size plans and photo illustrated instruction manual are a part of the kit. Two sheets of drawings are supplied, along with a 64-page manual that also covers construction of its smaller cousin, the PT-20 MK II. Construction begins with the fuselage, this being a box-type section. Several die-cut parts are required for each fuse side and they are reinforced with ply and balsa doublers. The instructions will assist you in making either of the two versions as you proceed with step-by-step check-off boxes. We elected to build the sport version. The formers are now adhered to the sides and we used Great Planes Pro CA adhesives throughout most of the construction.

At the fire wall, F-1, we placed the blind nuts for the engine mount and then secured it in place with Great Planes' 30-minute epoxy... "

Supplementary file notes

Review.

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PT-40 MkII (oz10911) by Craig Golema from Great Planes 1996 - model pic

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User comments

I remember the PT-40 being a good trainer for its time. Had at least one student who used it.
lincoln - 20/02/2019
By examination, all formers are present on the plan showing the F2 Former in both the rubber band bolt-on and options with details.
Bob Blubaugh - 23/01/2021
Got it. Have tagged this as formers complete now. Thanks.
SteveWMD - 23/01/2021
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