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 http://www.ffscale.co.uk/rees.htm 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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Datafile:
  • (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: 311

ScaleType:
  • Bristol_Type_138 | help
    see Wikipedia | search Outerzone
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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!
https://freeflightarchive.com/index.php/plans-gallery

Miguel - 29/05/2024
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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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