Bell P-39 Airacobra (oz3518)
About this Plan
Bell P-39 Airacobra. Rubber scale model fighter. Scale is 1/24. This plan is from the book 'Flying Scale Models of WWII' from MB magazine.
Quote: "The sleek lines and graceful proportions of the P-39 made it a beautiful aircraft! Designer Lawrence Bell showed refreshing originality in locating the engine over the wing and driving the propeller by an extension shaft. That location permitted a number of features; the pilot was well forward for visibility, the big 37mm cannon could fire through the propeller shaft, thus not requiring synchronization, and the nose could be thin and streamlined yet house tricycle gear for rough field operation.
The model is very realistic and flies well. It is built close to scale, with modest increases in stabilizer area, dihedral, and propeller size. Being a low winger with a short tail moment and smallish tail areas, it does not have much excess stability. Notice that the balance point is well forward. This increases the effectiveness of the tail and requires the negative able shown in the stabilizer.
The original model was kept light by using medium grade balsa, built up wheels, 1/32 x 1/16 stringers, and a light coat of dope. It weighs three quarters of an ounce empty, and flies for about a minute ROG.
When cutting the ribs and formers, do not notch them for the spars and stringers. Cut the notches after the parts are in position on the wing and the fuselage. Small errors in the notch position cause an unsightly snakiness in the long strips. This can be avoided by sighting along the ribs and formers and making required adjustments. As drawn, the formers are slightly oversize, to allow for tracing and cutting errors.
Note the stringers are pre-bent before being glued in place so they won't pull the body out of shape..."
Direct submission to Outerzone.
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
Bell_P-39_Airacobra | help
see Wikipedia | search Outerzone
search RCLibrary 3views (opens in new window)
ScaleType: This (oz3518) 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/Bell_P-39_Airacobra
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 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, 2011-2024.
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.