Bird of Time (oz2093)

 

Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - plan thumbnail

About this Plan

Bird of Time. Radio control sailplane model.

Quote: "...first published as a free reduced scale plan in the January 1979 issue of Radio Control Models or RCM. (USA) Designed as an Open Class 118in tow line sailplane, it seems to have had a renaissance of late with a Balsa Kit & an ARTF Fiberglass Fuselage version by Dynaflight."

Update 31/03/2014: Added supplemental eBIRD wing plan (modern alternate high performance wing), thanks to DavePayne. [see more pics 004, 005] An alternative high performance wing design.

Quote "Steve, Here is my plan for a high performance wing (non-polyhedral) for the Bird of Time. It has ailerons and flaps so 'crow' or 'butterfly' settings can be used. I would like to contribute it for those people who would want to build an advanced version of the BOT or add another wing option to their current BOT. DXF files for laser cutting will also be available. Here is my build log with photos: http://www.rcgroups.com/forums/showthread.php?t=2125318 The design has been tested and performs beyond my expectations. Using slight amounts of flap adds to the camber for still air and really improves the glide ratio. Also negative flaps helps to de-thermal a ship that is in a monster thermal. Landing with 'crow' makes precision spot landings a breeze. I am the author of the design. DavePayne"

Update 12/12/2014: Replaced this (the main) plan with a clearer version, thanks to theshadow. Also added alternate version of same plan as a supplement (another good clean scan) thanks to Thermaler.

Update 04/01/2016: Replaced Article file with a more complete copy (fixed missing text on p5) thanks to RogerClark.

Update 03/07/2020: Added kit instructions (from an original Thornburg kit) thanks to ChrisD.

Supplementary file notes

Article, thanks to Thermaler, hlsat.
Alternate version of the fullsize plan, thanks to Thermaler.
eBIRD wing plan.
Instructions.

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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - model pic

Datafile:

Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 003.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 004.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 005.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 006.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 007.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 008.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 009.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 010.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 011.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 012.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 013.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 014.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 015.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 016.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 017.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 018.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 019.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 021.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 022.jpg
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Bird of Time (oz2093) by Dave Thornburg from RCMplans 1979 - pic 023.jpg
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User comments

Today I send you some new photos of our secondary activity: RC sailplanes. The Birds of Time are something very special for my son and I. We have won several National Championships and we do not stop to keep and fly a few [more pics 006].
AntonioRG - 16/01/2017
Here are some photos of my Bird of Time, which I completed in the summer of 2018 [more pics 007-010]. This iconic design flies as well as it looks! Thanks for the service you provide through this website.
MarkF_Tucson_AZ - 21/01/2019
They are very well-known models so without further ado, Ocaña Virgen de los Remedios Trophy, Winner Toño (my son) and with BoT versus Avas Bird of time [more pics 011-015].
AntonioRG - 22/09/2019
eBird of Time wing... Only one wing? So I asked for a mirror image print and no problem.
Glenn Phipps - 23/10/2019
Sent from my iPhone [more pics 016, 017]
BigPondEmail - 18/02/2020
There have been many modifications and many versions of the Bird of Time. This one is mine [pic 018]. It is built from the orginal plan, increased to 147 inches. It flys exactly like the original.
Dale Denton - 24/05/2020
Steve and Mary, I hope this afternoon finds you safe and well! I spent last Weekend with Dave Thornburg [more pics 019-022]. In 1979 Dave had built a prototype V tailed version of the Bird of Time. He was not satisfied and gave me the fuse and said: You know V-tails, go make this work. 41 years later we flew the VBOT together in Moriarty New Mexico. Enjoy,
Larry Jolly - 07/06/2020
Bird of Time, the quintessential glider, the one I always wanted to build but never did!, that's why I earnestly wish to believe in reincarnation :-)
Please tell me Thornburg is the guy on the left, I always figured him as a heroic cross between Charlton Heston and Chuck Norris 8-)
Miguel - 07/06/2020
Following up on one recent Update I looked into the downloads counter in the Advanced option. The BOT is the most popular download at over 21.000, the world ought to be snowed under BOTs! Das Ugly Stick (oz1253) comes behind some 1,000. This must be Outerzone's way of telling the Beauty and the Beast story.
Miguel - 05/07/2020
My version of this timeless classic design [pic 023].
Nemzon - 18/07/2020
I just fly my B.O.T. today. (with hacker motor and phoenix ice ESC) Still learning about wind, and weather....have had it many years. If you undertake the project, you won't be disappointed. It will fly.
DL - 20/07/2020
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Download File(s):
  • Bird of Time (oz2093)
  • Plan File Filesize: 1704KB Filename: BirdOfTime_RCM-751_oz2093.pdf
  • Supplement Filesize: 1356KB Filename: BirdOfTime_RCM-751_oz2093_article.pdf
  • Supplement Filesize: 78KB Filename: BirdOfTime_RCM-751_oz2093_eBIRD_Wing_V3.PDF
  • Supplement Filesize: 801KB Filename: BirdOfTime_RCM-751_oz2093_instructions.pdf
  • Supplement Filesize: 2885KB Filename: BirdOfTime_RCM-751_oz2093_plan_Thermaler.pdf
  • help with downloads
 

Notes

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Scaling

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