About this Plan
B-24. Scale model WWII bomber, by Frank Baker, RCM plan #195, December 1966.
Quote: "Four engine single channel B-24 by Frank Baker. Easy to build, stable semi-scale model for single channel proportional.
WHEN I indicated my intention to build a radio controlled scale B-24 at a meeting of the Madison Area Radio Control Society, I received the usual smiles reserved for such projects. Mentioning that it would be for rudder only brought a chorus of: You are out of your mind! Thus encouraged, I proceeded to build and successfully fly what appears to be the world's first four engined rudder only scale R/C model.
The B-24 was a natural choice due to the large twin rudders which are directly behind each pair of engines and the general bulky airframe configuration. Before building the B-24 I constructed a semi-scale PBY which was used to test several radical ideas about multi-engined R/C models. The PBY turned out to be a very docile ship on either or both engines. In fact, the PBY was used as my practice plane for our local limbo contest. Experience with the PBY indicated that the secret to successful multi-engined rudder-only design was fourfold:
1. Some form of proportional control is mandatory.
2. Build the plane large.
3. Make it as light as possible.
4. Do not over-power the plane.
A glance at the B-24 plans reveals all four of these maxims have been closely followed. The radio equipment is simple pulse proportional, the span is a generous 60 inches, the weight ready-to-fly is only 44 ounces, and the power is provided by four Cox TO .020's. These characteristics arc diametrically opposed to the usual multi-engined scale plane which is normally heavy, overpowered, and aerodynamically unstable.
Hopefully, the B-24 will start a new trend as I am convinced nearly any four engined plane can be flown following the four axioms given above.
The most common question heard at the flying field is: How are you going to start all those engines? Rather than keep you in suspense, here is how it is done. Start the outboard right (facing the model) engine and adjust it to run smoothly. I do not attempt to peak out the engines but settle for a smooth run-ning engine on sport type fuel (Cox Blue can). Then, start the next engine and repeat the process until all four engines are running smoothly.
On larger multi-engined planes tachometers are used to synchronize the engine, but this is too much bother for sport flying. Hence, the engines are synchronized by sound and sight, and not too well at that. When all four engines are running. I quickly stop them by stuffing a cloth into the props. The tanks are topped off, and I restart each engine.
Using this procedure, the Cox's will actually start with one flip, hence, engine starting is no problem. Normal practice has been to start the two outboard, then the two inboard engines in hopes that they will quit in the same order. It has also proved more convenient to let one person start the engines while a second person holds the plane.
The B-24 is a very docile aircraft to fly and behaves like a Midwest Esquire (oz384) or a Debolt Champion (oz413) on a .15 engine. The first few flights were hand launched, but it was discovered by accident (someone let it go) that it will ROG from a grass field in about 50 feet...."
Supplementary file notes
Article pages, text and pics, thanks to Pit.
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
by Frank Baker
from RCMplans (ref:195)
Scale IC R/C Multi Military Bomber
all formers complete :)
got article :)
Found online 14/06/2015 at:
Format: • PDFbitmap
Credit*: RFJ, bullseye000
Consolidated_B-24_Liberator | help
see Wikipedia | search Outerzone
ScaleType: This (oz6706) 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.
ScaleType is formed from the last part of the Wikipedia page address, which here is https://en.wikipedia.org/wiki/Consolidated_B-24_Liberator
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.
Do you have a photo you'd like to submit for this page? Then email email@example.com
User commentsI used the b-24 plans from your site and made some dtfb plans and build. wasnt sure how to upload a picture of my build to your site. Heres the plans i used: http://www.outerzone.co.uk/plan_details.asp?ID=6706 Pic attached [see more pics 003] build thread link: http://forum.flitetest.com/showthread.php?20801-B-24-DTFB-design-and-build-log
Nate - 11/09/2015
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.