Bell P-39 Airacobra (oz14554)

 

Bell P-39 Airacobra (oz14554) by John Berryman 1988 - plan thumbnail

About this Plan

Bell P-39 Airacobra (Ivan's Iron Dog). Peanut scale model WWII fighter, for rubber power.

Quote: "The P-39 was built like a tank; in Soviet service it proved deadly against the Nazi panzers. Ivan's Iron Dog, by John Berryman.

The P-39, the airplane nobody loved. Our own fliers called it the 'Iron Dog.' Minus its turbocharger, and shipped to the British, it was judged unsuitable for combat in Europe. We even tried to sell a few to the French, but the country fell before they arrived. Saburo Saki, the famous Japanese Ace, shot themdown in droves. Quite an inauspicious beginning for what may have been the first single-engined fighter to exceed 400 mph in level flight.

But the Russians, who were starving for aircraft of any description, used them, and used them well. With its powerful 37mm cannon firing through the spinner, it was an efficient tank-buster in the early days of the war. Its trike gear must have also made it amenable for use on primitive Russian air-fields as well.

If anyone ever loved the P-39, it had to have been the Russians and we modelers. Finally, a WWII fighter with a decent nose moment, a fair-sized tail, and a bit of 1930s 'Bill Barnes-ish' panache, as well.

This peanut model may look familiar to those of you who were fortunate enough to pick up Model Builder's plan book of WWI! aircraft. It should because it's a reduction (and alteration) of Clarence Mather's P-39 Airacobra (oz3518). If you compare the two sets of plans, you'll see that the wing construction has been changed considerably and that all the wood has been appropriately down-sized for proper peanut construction.

In addition, I chose to use a home-brew prop of my own design on my Iron Dog. This is one model that won't need much nose weight; in fact, if you use a plastic prop, you may end up nose heavy. Mine weighed 6.5 grams (no rubber), and the CG ended up at about 10 percent (more about this later). While not a beginner's model, construction is straightforward for anyone who has ever built a few peanuts.

Flight Surfaces: Assemble the tail feathers (5-pound, 1/20-inch stock), and build the wing in the usual manner. I chose to use heavier 7-pound, 1/16-inch stock for the leading edge of the wing, as it does take a beating. The balance of the wing was assembled from 4-to 6-pound stock, in the sizes called for on the plans.

All the curved surfaces of the flight surfaces were laminated from two pieces of 1/40-inch that were soaked, and bent around appropriately sized cardboard forms. They were then glued while still damp with white glue. If you've never used this procedure before, I urge you to try it, as it's very light and strong. I also urge you to remember to wax the forms, or you may never get the tips off..."

Direct submission to Outerzone.

Supplementary file notes

Article.

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

Bell P-39 Airacobra (oz14554) by John Berryman 1988 - model pic

Datafile:
  • (oz14554)
    Bell P-39 Airacobra
    by John Berryman
    from Model Builder
    December 1988 
    13in span
    Scale Rubber F/F LowWing Military Fighter
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 27/04/2023
    Filesize: 267KB
    Format: • PDFbitmap
    Credit*: IanSalmon
    Downloads: 533

ScaleType:
  • Bell_P-39_Airacobra | help
    see Wikipedia | search Outerzone
    ------------
    Test link:
    search RCLibrary 3views (opens in new window)


    ScaleType: This (oz14554) 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/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.

Bell P-39 Airacobra (oz14554) by John Berryman 1988 - pic 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):
  • Bell P-39 Airacobra (oz14554)
  • Plan File Filesize: 267KB Filename: Bell_P-39_Airacobra_oz14554.pdf
  • Supplement Filesize: 1504KB Filename: Bell_P-39_Airacobra_oz14554_article.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, 2011-2024.

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.