Bristol 138a High Altitude (oz15313)


Bristol 138a High Altitude (oz15313) by Tom Akery 2014 - plan thumbnail

About this Plan

Bristol 138a High Altitude. Free flight scale model for rubber power. Wingspan 28 in.

Direct submission to Outerzone.

Quote: "Steve and Mary, I wanted to submit a new plan I've drawn of the Bristol 138a high altitude record setter.

The Bristol Type 138 High Altitude Monoplane was a British high-altitude single-engine, low-wing monoplane research aircraft developed and produced by the Bristol Aeroplane Company during the 1930s. It set nine world altitude records, with the maximum altitude achieved being 53,937 ft (16,440 m) on 30 June 1937, during a 2ΒΌ-hour flight.

I was intrigued by the long wingspan and the potential for a rubber powered model. I also liked the silver and black paint scheme on the single prototype.

The wing is built using the Dave Rees style sliced rib constrution. Mike Stuart has a very good tutorial on this construction on his site: Mike's flying scale model pages under his technique section, see I highly recommend this site for all the other info and plans he has available.

The fuselage is built using the fuselage box style with added formers to flesh out the fuselage. I think this will make a nice model. The cowling is built up and can be filled between the 3rd and 4th Cowling disc to smooth out the cowling or it can be covered with bond paper or tissue. I would us balsa infil to add a bit weight to the nose as this is a short moment nose aircraft where you'd probably have to add weight to balance. I think this will be a fun build. Tom Akery/Sky9pilot"


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  • (oz15313)
    Bristol 138a High Altitude
    by Tom Akery
    April 2014 
    28in span
    Scale Rubber F/F LowWing
    clean :)
    all formers complete :)
  • Submitted: 15/05/2024
    Filesize: 197KB
    Format: • PDFvector
    Credit*: TomAkery
    Downloads: 326

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User comments

Tom Akery keeps flying high with an eye for the rarely seen subject. Careful with this one, or she'll go OOS too easily!
Miguel - 26/05/2024
I was curious about what Tom might have in his hangar, he had added a lot since my last visit. He now has over 150 plans at the reach of a mouse click. See the link at the bottom, and look for the Sky9pilot's Constellation.
Thanks, Tom!

Miguel - 29/05/2024
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