Boeing L-15 (oz11778)
About this Plan
Boeing L-15A. Free flight scale model. For rubber power or CO2 installation (also shown).
Direct submission to Outerzone.
Update 06/12/2019: Added article, thanks to RFJ.
Quote: "Build the Boeing L-15A, by Dick Struhl.
Here's a most unusual flying scale model, the Boeing L-15A. One quick glance at the photographs of the plane will tell you that the L-15A has the most unorthodox configuration of any service aircraft today. Truly the plane resembles a 'flying bath tub' with a tail boom. But no matter how unusual the design, it is the most efficient liaison type in the world. The L-15A was expressly designed and built to provide the versatile performance needed by the Army Ground Forces for observation, range-finding and liaison missions.
Powered by a 125 horsepower Lycoming engine, this little plane cruises at 101 miles per hour, with a total range of speeds from 50 to 112 miles per hour. The gross weight is just under 2,050 pounds and the useful load is 541 pounds. Wing span is 40 feet even and the length is 26 feet.
As the subject for a flying scale model, the L-15A leaves very little to be desired. The high wing and stabilizer, twin rudders, long moment arm, and the CLA position all add up to a stable, dependable flying model. Equally important is the ease of construction and ruggedness.
The use of wing flaps has made the flight pattern quite varied. With the flaps in the down position, the model has a slow forward speed but the climb is like an escalator - straight up! And with the flaps in the normal or zero position, the flight path is quite conventional, with a floating glide.
The model was originally de signed as a rubber-powered model but its 30 inch wingspan lends itself very nicely to CO2 power. The necessary modifications are shown in the plans. Note that it is necessary to run the rubber motor out through the back window of the fuselage to hook onto the end of the tail boom. Of course when you have the model on display, you can remove the rubber motor. Incidentally, don't fret about the slender tail boom, it has been tested under fourteen strands of 1/8 flat rubber fully wound with no ill effects.
Due to the size of our pages, plans must be presented one-half size, except for the wing and stabilizer ribs which are full size. The graphs on the plans are all 1/2 in squares, so the enlarging job really isn't too bad. But enough talk, let's get to the pleasant task of building the L-15A.
Build the fuselage over full-size drawings of the side view. Use firm grade 1/2 in square stock to make the basic fuselage framework. Build two sides, one directly upon the other for perfect align ment. When dry, remove from the plans and connect with 1/8 square cross members. Note that the ex-treme top portion of the fuselage under the leading edge of the wing is pushed out slightly over the rest of the fuselage..."
Supplementary file notes
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
Boeing_L-15_Scout | help
see Wikipedia | search Outerzone
ScaleType: This (oz11778) 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/Boeing_L-15_Scout
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, 2011-2020.
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.