Douglas JD-1 (oz1275)
About this Plan
Douglas JD-1. Scale radio control twin. The JD-1, Navy version of the USAAC Douglas A-26 (the Invader) semi-scale model twin. Two Veco .35's for power. This is a large model, at 90 in span and 14 lb AUW. Winner of the 1962 RC Scale Nationals.
Quote: "Enter the Age of the Twin. 1962 RC Scale Nationals Winner.
Two Veco .35's proved perfect for this 90" span Multi Engined Multi Centrifugal Force Actuated Engine Cut-Offs.
Everything must have a beginning, so this will start with a quote from an unknown author, expounding the qualities of scale modeling: 'Everybody loves a good scale model. Other phases of modeling may attract more contestants, but all modelers are fans of flying scale at heart. The appeal of a miniature copy of a real airplane cannot be denied. After all, this is what the model hobby is really all about - models of airplanes. Although other specialized model types have evolved, the scale model is the all-time favorite. Scale building requires a high degree of craftmanship, ingenuity, and patience, (author's note - and a certain amount of vacuum, preferably between the ears) to produce a contest-winning model. Many modelers spend as long as a year producing a single model for the big Nats competition.'
My sole purpose in inserting this little goodie is to relate to you my wife's reaction to the last sentence. It went something like Brother, have I got news for him! This rather biting remark was an obvious reference to the fact that this little project was originally born about four years ago. I'll admit that about once each year I would sit back, take a long look, and say to myself this is ridiculous, after which it usually took about four months to get my nerve back and plunge forward again. Those little side trips however, were not entirely wasted, as this is where I gained much needed experience in flying twin engine.
Altogether there were three twins preceding the JD - two built from scratch, and one modified Dmeco Cub. The four month periods mentioned above usually worked out to be about three and three-quarter months building and one-quarter month flying. Boy, was I getting the experience! This so-called experience finally resolved itself down to only one item - there had to be some method of stopping the good engine when one quit. And further, this system must work automatically in the model instead of waiting for some idiot on the ground to find the right button.
Now, I've heard all sorts of stories of how this twin and that twin flies single engine fine, etc, etc, but these hot pilots have not lived until they've had an engine conk on take-off, or maybe while making a low altitude pass - this can become 'terribly exciting'. Anyhow, this became a must, for ourselves at least, and the system as finally decided upon has worked out perfectly. The operation will be explained later.
Since this is supposed to be a semi-construction article, we should get on with it. But first, there are a few things you should attend to.
Now, accepted practice is to look over the plans carefully before rushing to the balsa, so let's do this. The first thing apparent is that much of the detail has been omitted. One reason for this is the time-honored excuse that since only the experienced builder will take on such a project, it is not necessary. He's supposed to know about these things. However, there is another legitimate excuse - you see, I don't draw plans before the model is built. It just sort of grows like 'Topsy', and even though there are quite a few removable hatches, you would be surprised how many places you can't see.."
Update: Added a pdf (scaled up to full size) of the missing page p14 which shows nacelle structure and cross section details. Thanks to RalphGiordano for this.
Quote: "I downloaded the JD-1 B-26 plans and noticed the details for pylons and cowlings were missing. I contacted Flying Model and asked if they had it. It turns out they do and forward me the pdf. Can you update the current copy of the JD-1 with this page?"
Supplementary file notes
Planfile includes article.
Nacelle drawing.
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(oz1275)
Douglas JD-1
by Bob Doell
from Flying Models
February 1963
90in span
Scale IC R/C Multi Military Bomber
clean :)
all formers complete :)
got article :) -
Found online 22/06/2011 at:
http://www.rcgroups.com/forums/showthread.php?t=126587...
Filesize: 1075KB
Format: • PDFbitmap
Credit*: 50+AirYears, RalphGiordano
Downloads: 3709
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ScaleType: This (oz1275) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.
If we got this right, you now have a couple of direct links (above) to 1. see the Wikipedia page, and 2. search Oz for more plans of this type. If we didn't, then see below.
Notes:
ScaleType is formed from the last part of the Wikipedia page address, which here is https://en.wikipedia.org/wiki/Douglas_A-26_Invader
Wikipedia page addresses may well change over time.
For more obscure types, there currently will be no Wiki page found. We tag these cases as ScaleType = NotFound. These will change over time.
Corrections? Use the correction form to tell us the new/better ScaleType link we should be using. Thanks.





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- Douglas JD-1 (oz1275)
- Plan File Filesize: 1075KB Filename: Douglas_JD-1_oz1275.pdf
- Supplement Filesize: 147KB Filename: Douglas_JD-1_oz1275_nacelle_drawings.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
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