Orion (oz6562)

 

Orion (oz6562) by Milan Drazek 1965 - plan thumbnail

About this Plan

Orion. CL team racer model.

Quote: "Hello Steve, I have a pdf of the Czech team racer Orion but it will need cleaning up before posting on the site, I have a couple of photos too. It was published in Aeromodeller, May ’65 & was only available I believe by special request from the Aeromodeller offices, it never went into the plans list, could have only been 1/2 size as well, my scan is full size. Regards,"

Direct submission to Outerzone.

Update 10/10/2023: Added vector format plan, also article (from 2021), thanks to Pertti.

Quote: "Hi, I found a vector version of the Orion CL team racer oz6562. I think I managed to size it pretty well, assuming the wings are equal length. The plan says: Autocad: Pavol Barbaric 07.03.2021. There is also an article, starting on page 22 at https://www.slis.org/_Media/2021_2.pdf [see supplements]. Pertti"

Quote: "Orion, a Czechoslovak Team Racer. Building of the Orion, by Pavol Barbaric.

Described model is the current development done by Milan Drazek, flying as teammate with Jiri Trnka. It represents how a strict efficiency and elegance could be coupled. The model has very good flight parameters, is robust and lightweight (not to compare with current F2C models).

Construction material is mainly balsa, epoxy resin only used for gluing and all external surfaces covered with thin (3o g/dm2) fibre glass. Certain degree of experience and skills are required for successful model building, the described building method is kept as short as possible.

The 1964 World Championships, where it placed second, was held in Hungary. Nowadays we must see the construction as well as used materials or technology with another view, as the model was designed and built almost Go years ago, so if you consider to build it, you probably need to use current materials and technologies, unless you plan to make an exact copy of the model. Good luck and enjoy the flying.

Fuselage: Basic and most difficult part of the model's construction is the engine mount 3a holding the engine and whole fuel system. The massive frame secures the protection of fuel tubes/hoses are jeopa-dized to the engine's vibrations and simultaneously an easy system of tank regulation is possible.

The frame is milled from Duraluminium of 11 mm thickness. Front part is the engine mount with M3 threads to fasten the engine (drilled according to the used engine). Rear part is bearing the fuel tank 9a-f as well as filling valve 10a-h, lightened as much as reasonable. Arrestation bolts 3b dia 2 mm each, are pressed to the chamfered front part and these are fixing the upper cowl part. Four countersunk M3 x 20 mm screws 14 are placed in dia 3.2 borings. Remaining three M3 x 5 mm screws (12 a 13) as well as one M3 x 40 mm screw (15) is fixing the upper fuselage cowl.

The upper fuselage cowl 2a-d is carved out of balsa 2b. The contact surfaces to the fuselage bottom part are reinforced by i mm plywood parts 2C a 2d. Front part is reinforced by using 3 mm plywood, formed according to the propeller nut. To avoid the damage of fastening bolt (3b) holes, the use of bushings (2e) made of brass tube is highly recommended. The screw hole for M3x4o screw (15) must be drilled together with main frame attached. The cabin glazing is pressed from organic glass (like Umaplex) 1,5-2 mm strong..."

Supplementary file notes

Article (2021).

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Orion (oz6562) by Milan Drazek 1965 - model pic

Datafile:
  • (oz6562)
    Orion
    by Milan Drazek
    from Aeromodeller
    May 1965 
    40in span
    C/L
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 16/04/2015
    Filesize: 448KB
    Format: • PDFbitmap • PDFvector
    Credit*: Flyingflea, Pertti
    Downloads: 1622

Orion (oz6562) by Milan Drazek 1965 - pic 003.jpg
003.jpg

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Notes

* Credit field

The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.

Scaling

This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.

 

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