Floating Kidney (oz7727)


Floating Kidney (oz7727) by FG Birden 1947 - plan thumbnail

About this Plan

Floating Kidney. All-wing glider model.

Quote: "Herewith a very old Aeromodeller plan 'Floating Kidney', might go well with a Ducted Fan if enlarged. I apologise for its poor quality, it is over 50 years old. If you can make anything of it, its rarity value would make it worth the effort."

Note this plan could use a good clean-up.

Direct submission to Outerzone.

Update 27/05/2016: article pages, text & pics added. Found online at www.rcgroups.com Thanks to Doug for sharing the link.

Update 02/06/2016: Replaced this plan with a version completely redrawn from scratch in PDFvector format, thanks to GeneRock.

Quote: "Hi Steve and Mary, This one was a struggle to recreate in CAD. You will notice that the spars do not agree with the original drawing. I added a required split line to all but F so that the model can be assembled. You will notice that there are very few straight edges. the model will require careful sanding to achieve all the required chamfers. Gene Rock"

Supplementary file notes

Previous scan version.


Did we get something wrong with these details about this plan (especially the datafile)? That happens sometimes. You can help us fix it.
Add a correction

Floating Kidney (oz7727) by FG Birden 1947 - model pic

  • (oz7727)
    Floating Kidney
    by FG Birden
    from Aeromodeller
    January 1947 
    15in span
    Glider F/F
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 13/05/2016
    Filesize: 154KB
    Format: • PDFbitmap • PDFvector
    Credit*: MikeWight, GeneRock

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

Congratulations on the clean up of the Floating Kidney plan. I did not realise how doggy my original was until I saw the rework. Have downloaded it and now considering upsizing it with a ducted fan to push it along.
MikeWight - 07/06/2016
16" span and a 5x3x2 tractor prop on a FT Radial 1806 or equivalent will do wonders with this wing planform. I run mine with the aforementioned specs on a 1300 mAh 45c 3s battery and she handles great. Ultra light wing loading from the big wing area and a very forward CG means even a smaller model will like a big fat battery. I get like 30 minutes of flight per charge and plenty of power even with the modest prop. Anyone who enjoys a Nutball, it's a lot like that with some subtle nuanced differences.
Vimana89 - 08/08/2019
I've updated my prototype electric foamy with the 16" span I mentioned before. It originally had a "sawed off" nose compared to the original glider, but I built and swapped to an A fold box nose that looks very much like the original glider's nose. It was originally a bit tail heavy and needed the 1300 mAh battery, but with a full nose and the same specifications, I'd recommend an 850 instead.
If the CG is right on or a little nose heavy, this plane will have a very good glide ratio. I cut all throttle from fairly high up and was able to glide down for a safe and smooth landing.
Vimana89 - 12/08/2019
I'd like to nominate V's achievement for the OZ Silk Purse out of a Sow's Ear 2019 Award.
Miguel Morao - 12/08/2019
Add a comment



Download File(s):
  • Floating Kidney (oz7727)
  • Plan File Filesize: 154KB Filename: Floating_Kidney_1947_oz7727.pdf
  • Supplement Filesize: 2482KB Filename: Floating_Kidney_1947_oz7727_article.pdf
  • Supplement Filesize: 716KB Filename: Floating_Kidney_1947_oz7727_previous.pdf
  • help with downloads


* 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.


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.


Terms of Use

© Outerzone, 2011-2022.

All content is free to download for personal use.

For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.

Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.