Douglas A-26 Invader (oz9062)

 

Douglas A-26 Invader - plan thumbnail image

About this Plan

Douglas A-26 Invader - Scale twin WWII American attack bomber, for control line.

Quote: "In response to the heavy demand from the many I readers who now find themselves in possession of more than one 1 cc to 2.5 cc diesel, we now have pleasure in introducing this tried and proven design to Plans Service. Don Deeley selected the A26A Invader as a 'natural' for twin engined control-line. Fitted with a pair of Elfin 1-49's, his prototype has covered many miles at scale appearance speed of 45-50 mph, and we have no doubt that two smaller or larger engines would provide equal entertainment at a slight variance in speed. It would also accommodate two engines of unequal capacity, though in this case, the larger engine should be fitted in the inboard nacelle.

Construction is both robust and simple. All-up weight at 40 oz is enough to require extra tough control-line wires, yet at the same time does not provide an over-heavy wing loading to spoil its excellent three point landings and general maneouverability.

Start building with the wing, taking care to bind and cement the ply gussets to the spars, except where fuselage and nacelle formers locate. Then cement formers F4 and F5 to the spars, and fit the bottom keel. Bellcrank assembly, formers F1 to F10, the nosewheel and planking between F1 and F6, F7 and F10 follow in that order. Now cut away keels and fit balsa between F6 and FT.

Make up tail assembly minus fin and rudder and fit, then build nacelles onto wing spars and attach undercarriage legs. Plank all over and sand to shape, giving a coat of sanding sealer.

Wings are sheet covered and fin and rudder added, the tail end being streamlined off by a balsa fairing block. Ballast by fitting engines and tanks and adding lead nose weight. Remove the engines for final cowling detail, etc, and attach moulded canopies, gun turrets and scale detail, before colouring all over with silver and black anti-glare panels.

Perhaps the greatest deterrent to the twin is engine starting; however, Don Deeley reports no trouble whatsoever if the following procedure is adopted. Start the outer engine first, warm it up, stop it, fill up the tank again and prime ready to start. Then switch to the inner, start up, set it right, then back to the still warm outer engine, which should soon burst into song."

Direct submission to Outerzone.

Update 12/08/2017: Added PDFvector plan tracing, thanks to hogal.

Supplementary file notes

Article pages, thanks to hogal.
PDFvector plan tracing.

Corrections?

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

Douglas A-26 Invader - completed model photo

Datafile:

003.jpg
003.jpg

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

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

 

 
 

Download File(s):
  • Douglas A-26 Invader (oz9062)
  • Plan File Filesize: 1135KB Filename: Douglas_A26_Invader_CL_oz9062.pdf
  • Supplement Filesize: 1504KB Filename: Douglas_A26_Invader_CL_oz9062_article.pdf
  • Supplement Filesize: 292KB Filename: Douglas_A26_Invader_CL_oz9062_vector_hogal.pdf
  • help with downloads
 

Notes

* 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.

Scaling

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, 2011-2019.

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.