Gregor FDB-1 oz1160


Gregor FDB-1 - plan thumbnail image

Gregor FDB-1 - completed model photo

This plan was found online 02/06/2011 at:
Outerzone planID: oz1160 | Filesize: 991KB | Format: • PDFbitmap | Credit*: nibor, Ratracer


About this Plan

CCF Gregor FDB-1 - Scale control line model of the Canadian fighter biplane. The last of the biplane fighters.

Quote: "REPRESENTING the last link in fighter design between World Wars I and II, the Gregor FDB-1 was probably the cleanest and smartest-looking biplane ever built. It could properly be called the last biplane fighter, since all succeeding designs have been monoplanes. Before the United Kingdom entered World War II, the Canadian Car and Foundry Co of Ontario was producing Grumman designs under license and various British aircraft types. The Gregor FDB-1 represented the company's first original design. Completed in late 1938, test flights proved the qualifica-tions of the design, but because of the impending conflict the plane was never produced in quantity. Instead, United Kingdom production was standardized on the Spitfire and Hurricane, and these types bore the brunt of Hitler's attack on England. Possessing the good maneuverability of the biplane, the FDB-1 carried light armament in comparison to the eight-gun Spits and Hurricanes. Power was originally the 750 hp P&W Twin-Wasp Jr, but the design was suited for engines up to 1200 hp. Wingspan was 28 ft. and top speed was 300 mph at 9000 ft.
The model presented here is scaled at 1-1/4in = 1ft directly from factory 3-view, giving a span of 35in and a wing area of 271 sq in. Details such as spinner, aluminum cowling, canopy and wheels scale out to the sizes readily available at most hobby shops. The ship is designed primarily as a good flying scale design; however, limited stunting is possible and has been done. A symmetrical wing section is shown on the plans and was used on the original model; thickness is the same as the scale lifting section. Although the wing loading is too high to compete against the pure stunt design, the final weight of 32 oz giving a wing loading of 11.7 oz/100 sq in allows for plenty of loops, Eights and inverted flight. The good flying characteristics of full-scale biplanes seem to carry over to the model, and no difficulties were experienced even on the first flight with a good wind blowing. It's a real treat to see this baby stunt.
The only bug in the entire model proved to be balance. Because the nose is so short, about 11/2 oz of lead weight was added inside the cowling to bring the CG to its proper place. Needless to say, we haven't flown without the weight, because flights have been fine with CG as shown on the plans. If you want better stunt performance, overall weight reduction is the answer..."

Update 07/11/2017: Replaced this plan with a clearer copy, thanks to Ratracer.

Quote: "Roger Newman over at the David Baker Heritage Library site was kind enough to share these plans with us and should be mentioned."

Direct submission to Outerzone.

Update 09/11/2017: added article, thanks to theshadow.

Supplementary files

Previous scan version.


Did we get something wrong with this plan? That happens sometimes. Help us make a correction


oz1160 datafile

Gregor FDB-1  
by S Cal Smith
from Air Trails
March 1950 
34in span
Tags: Scale IC C/L Biplane Military Fighter
all formers complete :)
got article :)


Do you have a photo you'd like to submit for this page? Then email

User comments

No comments yet for this plan. Got something to say about this one? Click here to Add a comment




* 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, 2011-2018.

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.