Rearwin Speedster oz9502


Rearwin Speedster - plan thumbnail image

Rearwin Speedster - completed model photo

Submitted to Outerzone: 24/11/2017
Outerzone planID: oz9502 | Filesize: 966KB | Format: • PDFbitmap | Credit*: DBHL, theshadow


About this Plan

Rearwin Speedster. Rubber scale model. 1940 Nationals Rubber Scale Winner.

Quote: "THE Rearwin Speedster airplanes manufactured in Kansas City, Kansas, during recent years, have certainly been a model builder's dream-come-true so far as flying scale models are concerned. During the past three Nationals a relatively large number of this type has been entered in the Scale Model Event. After comparing the Speedster with other aircraft the reason for its predominance becomes apparent. The features which make the Speedster so desirable are the relatively long fuselage, in-line engine and large vertical tail.

Performance characteristics of the actual Rearwin Speedster, powered with a Menasco 125 horsepower engine, are very good. For its relatively low power it has a maximum speed of 150 mph, a rate of climb of 1300 ft/min and a ceiling of 1800 ft.

The model of the Speedster seems to have similarly good performance when properly adjusted. The original model weighed approximately seven and one-half ounces when ready to fly, but in spite of this fact flights varying from 90 to 120 seconds have been made consistently; its official flight was 87 seconds at the Nationals.

Incidentally, a very interesting incident happened to the original model while making test flights the morning of the Scale Model Event at the Nationals. The model was wound near capacity and launched on a flight which proved to be nearly two minutes. We were happily chasing as it came gliding down like an outdoor cabin model, when, as it approached the ground, we saw it was going to land on a bare spot on the field. We thought surely when it would land it would nose over and damage the covering, because the wheels projected very little below the pants. But to our amazement, as well as our friends, the model alighted on the rather rough ground and came to a stop after a short run; just like a real plane.

Our airplane was designed with greatest consideration given to ruggedness, stable climb, flat glide and appearance. By following the directions and plans carefully an exact scale model with very good contest possibilities can be made. Before starting any building, make cross section plates 1 and 3 in 1/4 in squares and two large sheets of paper measuring 14 x 20 inches in 1/2 in squares. Then proceed to enlarge the plans to full-size by drawing the lines appearing on the plates through corresponding squares on the large paper.

Fuselage. Two blocks 1-1/4 x 4-1/2 x 22 in are needed. The blocks should be soft, clear wood such as is used for indoor model propellors..."

Quote: "1940 Nationals Rubber Scale Winner. Original plan published in Model Airplane News May 1940. Drawn by Harold Osborne. Scale 1-1/8in = 1 foot. 25 years ago I wanted to build his model but I did not know how to enlarge the plans, and the carved fuselage stopped me cold. It still does, so sections 1 thru 12 and conventional framework fuselage is included in this plan. H Osbourne, 12 April 1970"

Scan from DBHL, cleanup by theshadow.

ref DBHL-6093.

Direct submission to Outerzone.

Update 10/10/2018: Added article, thank to Pit. Includes plan drawings as originally published, 1941.

Supplementary files



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oz9502 datafile

Rearwin Speedster  
by Edward Naudzius
from Model Airplane News
May 1941 
35in span
Tags: Scale Rubber F/F Cabin Civil
all formers complete :)
got article :)



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User comments

Now that I've read the article and seen the original drawings as printed, I can really appreciate what a beautiful drawing this plan by Harold Osborne is.
SteveWMD - 10/10/2018
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* Credit field

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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.


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