Doublet. Radio control sport twin model. For 2 x Enya .19 motors.
Quote: "AFTER spending some weeks looking around for a new project, I developed the urge to build a twin, and the sight of a large twin flying at Esher Club symposium last year finally spurred me on. I really wanted an acrobatic model, and, as there didn't appear to be a commercial plan available, I set out to design my own.
The basic aerodynamics are those of a conventional acrobatic single engined model, but with the two engines and a scalish fuselage. The resultant model is really satisfying to fly, being quite lively on the two 19's and it really dispels some of the fantasies put around about what will happen if one motor cuts!
Doublet will loop, bunt, roll, spin, and fly inverted as well as any single engined model of the same calibre, and that beautiful beat of the two motors, I find a real thrill. If a motor does cut, she will hold off with a little aileron and even climb slowly, so, if you feel you want to have a go, let's make a start.
Construction. This model is not intended for the beginner, rather a new adventure for the reasonably accomplished builders and flyers, so I will do my best to point out possible pitfalls in construction rather than provide a blow by blow, A to B method of construction.
The original model had a home-made foam wing covered in mahogany veneer with strengthening hardwood spars to carry the undercarriage and to stiffen the area by the nacelles in the positions shown on the plan, but a built up wing is shown should you prefer this type of construction. Join the two halves together using the two 1/4in plywood dihedral keepers, and web in between top and bottom spars at the two inner bays using 1/8in hard balsa, grain vertical. Use a wing jig if you have one, to preserve alignment..."
Doublet, RCM&E, June 1977.
Direct submission to Outerzone.
Article pages, thanks to RFJ.
Did we get something wrong with this plan? That happens sometimes. Help us make a correction
Do you have a photo you'd like to submit for this page? Then email firstname.lastname@example.org
* 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, 2011-2018.
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.