Big Boy IV (oz8314)


Big Boy IV (oz8314) by Vaclav Horcicka 1974 - plan thumbnail

About this Plan

Big Boy IV. FAI competition power model. World champion design.

Quote: "The origin of the Big Boy FAI series reaches as far back as 1960, when the FAI announced an engine run reduction from 15 to 10 seconds. Till then I had stuck to small models of conventional layout, using mainly 09 diesels ...designed for .15 power, using the then new Austrian Bugl 15 Oliver diesel, with the highly efficient Czech 8-1/4 x 3-1/2in MVVS wooden props. An ED timer for sutoff, plus a Tatone DT were used. Neither autorudder nor autostab were employed. The initial experience with Big Boy I was quite good, and prompted me to conceive Big Boy II..."

Direct submission to Outerzone.


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

Big Boy IV (oz8314) by Vaclav Horcicka 1974 - model pic


Big Boy IV (oz8314) by Vaclav Horcicka 1974 - pic 003.jpg

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?
Add a comment



Download File(s):


* 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, 2011-2024.

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.