About this Plan
The Barnstormer. Singel channel radio control biplane sport model. From American Modeler February 1957.
Quote: "Starting Out as a Free Flight Design Ten Years Ago, Jack's Latest Answers Numerous Requests For 'Forgiving' R/C Biplane. Barnstormer, by Jack Luck.
This little biplane was first designed as a Free-Flight nearly 10 years ago. Since then it has undergone constant develop-ment until, in its present R/C form, Barnstormer gives a performance equal to that of the best. A safe, relaxing airplane to fly and yet no slouch in maneuvering either. In over 25 years of designing and building model airplanes, this is the one to which I point with greatest pride.
Construction: Proceed according to the standard practice of building the lower part of fuselage, upside down, over the plan and then building the removable top directly on the completed lower half to assure a perfect fit. Note the following before construction begins.
1. Plan R/C layout carefully in order to concentrate all weight as far forward as possible. Re-locate front formers, if necessary, to suit a particular installation and read the remarks on nose length under flight testing.
2. Cabane strut structure must be sawed out of strong aluminum sheet .040 to .064 thick. Best way to assure material of adequate strength is to specify 'Tempered' or 'Hard' sheet. Such alloys are usually designated by the letter T or H after the alloy number.
3. Do not cement stab to fuselage until after flight testing. A few spots of cement will tack the stab in position until the exact incidence has been determined. Some builders would rather leave the stab separate. This is quite practical and calls only for the addition of appropriate dowels for the rubber hands.
4. CG location is only critical in terms of optimum performance. Try to balance the ship at the point shown, or ahead of it.
Glide Testing: Fortunately quite easy because of the light wing loading. 10 to 14 ounces per square foot being about the range between light and heavy builders.
Without upsetting the general relationships of flying surface incidences, aim for a steady and definite downward glide. Because of the light loading, study the glide carefully. What may appear as floating could be, in fact, the desired glide angle. The model has a lower stalling speed than most orthodox designs and there is little sense in trimming out this asset in favor of an unnecessarily fast glide. It is again stressed that while the exact degree of positive decalage (when lower wing has greater incidence than top wing, the decalage is positive) is established empirically, for best results it must still be positive. Similarly, longitudinal dihedral must be as generous as possible..."
Update 05/02/2019: Added article, thanks to RFJ.
Supplementary file notes
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
Do you have a photo you'd like to submit for this page? Then email firstname.lastname@example.org
User commentsNo comments yet for this plan. Got something to say about this one?
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.
© Outerzone, 2011-2019.
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.