They Fly Right Off the Ground!

Welcome to the house of Frog, a web site devoted to the free flight model aircraft kits produced by International Model Aircraft Ltd.

I have become something of a fan of the splendid free flight flying models produced as kits by Frog in the 1940's and 50's, and feel they are often overlooked in favour of the better known Keil Kraft and Veron designs of the same period. So, in an effort to make them more widely known, and hopefully encourage more to be built, I thought I would have a go at scanning some of the plans and placing them here for download. In many cases the original kits were die cut, so I have tried to draw items such as fuselage formers that may not have been on the original plan. Some bits of the plans have also been redrawn in places for clarity.

I am hoping these plans are out of copyright. They are all 50 years old or more, and the Frog company has not existed for many years. The kits have never to my knowledge been re-issued. So, I hope I am not treading on anyone's toes. If anyone knows differently, please let me know!!! I think they are just too nice to never see the light of day again.

Please send me photos of any models you have built, and let's see if we can build up a comprehensive photo gallery of Frog flying models.

Also, if anyone would like to submit any information or personal recollections of International Model Aircraft Ltd. and their flying model kits, I would be delighted to hear from you.

Latest updates

De-Luxe Scale Ryan PT-20 plan added 08.04.15
New photos added to Senior Series and glider pages

De-Luxe Scale Cessna 180 plan added 13.02.14
New photos added to Senior Series, gliders and scale model pages

Follow the links below to access different sections of the site:

Frog Senior Series plans

Frog Senior Series photo gallery

Rubber powered scale models *Ryan PT-20 plan added 08.04.15*

More rubber model plans

Frog Junior Series plans

Frog Junior Series scale plans

Frog glider plans

Power model plans

1960 flying model catalogue

Ready to fly models

Memories of working for Frog

Wilmot Mansour Commemorative Exhibition, May 2005


Feel free to E-mail me with comments or suggestions

Site last updated 8th April 2015

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